ATL: IRMA - Post-Tropical - Discussion

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Sanibel
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Re: ATL: Irma: Observations,Web Cams,Local NWS Statements (NE Caribbean/Bahamas/Florida/SC/NC)

#12421 Postby Sanibel » Fri Sep 15, 2017 9:59 am

My smartphone just came back to life after being knocked out by Irma's eyewall moisture...I put the phone in rice for 2 days to suck out the moisture and it worked...I've got video of Irma's eyewall at RSW Airport...
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Re: ATL: Irma: Observations,Web Cams,Local NWS Statements (NE Caribbean/Bahamas/Florida/SC/NC)

#12422 Postby bvigal » Fri Sep 15, 2017 10:09 am

Sanibel wrote:My smartphone just came back to life after being knocked out by Irma's eyewall moisture...I put the phone in rice for 2 days to suck out the moisture and it worked...I've got video of Irma's eyewall at RSW Airport...


Sanibel, so happy to hear it wasn't as bad as what you had in Charley!
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Re: ATL: IRMA - Post-Tropical - Discussion

#12423 Postby jabman98 » Fri Sep 15, 2017 5:13 pm

Hurricane Andrew wrote:Well, I am flying home today after working relief efforts since Saturday. It was an interesting experience...including my first time through the RFQ of a legitimate hurricane. I can now definitvlry say that anyone who says the words "just a cat 1" and means them may very well be an idiot.

I was in one location near Everglades City that had been hard hit by surge. There was a mess of debris and stuff at the high water mark; kids toys, shoes, clothes, even a softball bat, and as I stood there, the thought came upon me that I was literally looking at the remnants of people's lives. It was quite sobering.

The keys are, to ky understanding, an absolute disaster zone. And as bad as it was for mainland Florida, it could have been worlds worse. This storm should serve as a warning to us all, that preperation is not an option but a necessity.

I will come out of this hurricane with a few good memories, a few bad ones, and a bunch of scars on my arms from clearing trees. So many Floridians will come out having lost so much, and for that, my heart is with them.

Mankind cannot hold a candle to nature. We never have, and we never will. When the next storm comes, and it will come, all we can do is prepare, hold on, and respond to help our fellow men and women in need.

I believe that another Cat 5 will make landfall in FL, and likely sooner rather than later. The entire response force of the US, from local EOCs to the federal government, as well as civilian volunteers, must make ready to deal with this threat.

Every couple of decades, a major storm comes along that all following storms are compared against. Camille; Andrew; Katrina, and now Harvey. What will the next one be?

What a great post. Thank you for helping those in need.

Has anyone heard from Floridasun?
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Re: ATL: Irma: Observations,Web Cams,Local NWS Statements (NE Caribbean/Bahamas/Florida/SC/NC)

#12424 Postby Sanibel » Sat Sep 16, 2017 1:20 pm

I've got really good eyewall video and the blasted Photobucket says "This person has either renamed or deleted this video" every time I try to upload it...
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Re: ATL: Irma: Observations,Web Cams,Local NWS Statements (NE Caribbean/Bahamas/Florida/SC/NC)

#12425 Postby lisa0825 » Sun Sep 17, 2017 9:32 am

Sanibel wrote:I've got really good eyewall video and the blasted Photobucket says "This person has either renamed or deleted this video" every time I try to upload it...


Have you tried any other sites aside from Photobucket?
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Re: ATL: IRMA - Post-Tropical - Discussion

#12426 Postby SouthFloridian92 » Tue Sep 19, 2017 8:44 pm

Irma was crazy. When the eyewall came over us, it sounded like a freight train outside.
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Re: ATL: IRMA - Post-Tropical - Discussion

#12427 Postby Shell Mound » Sun Oct 01, 2017 8:23 am

The National Weather Service in Key West has completed its post-storm survey. Based on the survey, the strongest estimated wind gusts (~139 knots) apparently occurred in connection with a mesoscale feature and did not represent the actual winds in the eyewall. The highest representative gusts in the area of peak damage were ~113 knots. If true, these results would indicate that Irma probably weakened to below Category-4 status by the time it struck the lower Florida Keys. Peak gusts of ~113 knots would suggest maximum sustained winds of about 95 to 100 knots, making Irma a high-end Category-2 or low-end Category 3 over the Keys—about the same strength as that at its second landfall over Marco Island. However, aircraft data did support surface winds of 110 knots, shortly after Irma's passage over the Keys, and the aircraft may have missed the strongest winds. The influence of dry-air intrusion and shear could indicate that those winds were not mixing efficiently to the surface. In that case, Irma would have been closer to a high-end Category-2 or low-end Category-3 hurricane over the Keys and southwestern mainland of Florida, though gusts would have easily been much higher, thanks to strong convective downbursts in the northern eyewall.

000
ACUS72 KKEY 291651 AAB
PSHKEY

POST TROPICAL CYCLONE REPORT...HURRICANE IRMA...UPDATED
NATIONAL WEATHER SERVICE KEY WEST FL
1250 PM EDT FRI SEP 29 2017

UPDATED TEXT IN HEADLINES AND INCLUDED BAHIA HONDA STATE PARK
RAINFALL TOTAL.

NOTE: THE DATA SHOWN HERE ARE PRELIMINARY....AND SUBJECT TO UPDATES
AND CORRECTIONS AS APPROPRIATE.

THIS REPORT INCLUDES EVENTS OCCURRING WHEN WATCHES AND/OR WARNINGS
WERE IN EFFECT...OR WHEN SIGNIFICANT FLOODING ASSOCIATED WITH IRMA
OR ITS REMNANTS WAS AFFECTING THE AREA.

COUNTIES INCLUDED...MONROE


A. LOWEST SEA LEVEL PRESSURE/MAXIMUM SUSTAINED WINDS AND PEAK GUSTS
---------------------------------------------------------------------
METAR OBSERVATIONS...
NOTE: ANEMOMETER HEIGHT IS 10 METERS AND WIND AVERAGING IS 2 MINUTES
---------------------------------------------------------------------
LOCATION ID MIN DATE/ MAX DATE/ PEAK DATE/
LAT LON PRES TIME SUST TIME GUST TIME
DEG DECIMAL (MB) (UTC) (KT) (UTC) (KT) (UTC)
---------------------------------------------------------------------
KEYW-KEY WEST INTERNATIONAL AIRPORT
24.56 -81.76 I 020/052 10/1115 030/082 10/1113

KMTH-FLORIDA KEYS MARATHON INTERNATIONAL AIRPORT
24.73 -81.05 I 060/044 09/2353 060/062 09/2345


NON-METAR OBSERVATIONS...
NOTE: ANEMOMETER HEIGHT IN METERS AND WIND AVERAGING PERIOD IN
MINUTES INDICATED UNDER MAXIMUM SUSTAINED WIND IF KNOWN
---------------------------------------------------------------------
LOCATION ID MIN DATE/ MAX DATE/ PEAK DATE/
LAT LON PRES TIME SUST TIME GUST TIME
DEG DECIMAL (MB) (UTC) (KT) (UTC) (KT) (UTC)
---------------------------------------------------------------------
KYWF1 - KEY WEST NOAA/NOS TIDE GAUGE
25.55 -81.81 340/061 10/1224 340/078 10/1224
ANEMOMETER HEIGHT 15 M (49.2 FT AGL)
ADDITIONAL WIND REPORTS FOR THE NORTH KEY
LARGO HANDAR AND KEY DEER NWR RAWS IN SECTION A AND STORM TOTAL
RAINFALL REPORTS IN SECTION C.
VCAF1 - VACA KEY NOAA/NOS TIDE GAUGE
24.71 -81.11 160/054 10/1342 160/081 10/1342
ANEMOMETER HEIGHT 6.5 M (21.3 FT AGL)

XSMS - WEATHERFLOW KEY WEST COAST GUARD SECTOR
24.57 -81.57 952.9 10/1225 014/053 10/1140 349/077 10/1245

XUMK - WEATHERFLOW UPPER MATECUMBE KEY
24.92 -80.64 976.3 10/1256 160/061 10/1436 158/081 10/1401

XSKL - WEATHERFLOW SOUTH KEY LARGO
25.10 -80.43 980.8 10/1347 135/054 10/1542 135/074 10/1542

TS607 - KEY DEER NATIONAL WILDLIFE REFUGE RAWS (BIG PINE KEY)
24.72 -81.39 090/048 10/1438 104/104 10/1338
ANEMOMETER HEIGHT 6.1 M (20 FT AGL)
SUSTAINED WINDS 10-MIN AVERAGE

KLNF1 - NORTH KEY LARGO HANDAR
25.19 -80.35 987.5 10/1400 110/045 10/1330 110/063 10/1300
10/1500

WFO KEY WEST (ROOFTOP RSOIS)
24.55 -81.79 030/079 10/1155

USCG ISLAMORADA STATION
24.95 -80.59 050/071 10/0430
ANEMOMETER HEIGHT 5.5 M (18 FT AGL)

104.1 FM STUDIO - UPPER SUGARLOAF KEY
24.67 -81.53 939.7 10/1315
REMARK: REPORTED AS 27.75 IN


B. MARINE OBSERVATIONS...
NOTE: ANEMOMETER HEIGHT IN METERS AND WIND AVERAGING PERIOD IN
MINUTES INDICATED UNDER MAXIMUM SUSTAINED WIND IF KNOWN
---------------------------------------------------------------------
LOCATION ID MIN DATE/ MAX DATE/ PEAK DATE/
LAT LON PRES TIME SUST TIME GUST TIME
DEG DECIMAL (MB) (UTC) (KT) (UTC) (KT) (UTC)
---------------------------------------------------------------------
PLSF1 - PULASKI SHOAL LIGHT CMAN
24.70 -82.77 986.5 10/1500 010/059 10/1200 010/072 10/1142
ANEMOMETER HEIGHT 17.7 M (58.1 FT AMSL)

XSMS - WEATHERFLOW SMITH SHOAL LIGHT
24.72 -81.92 964.6 10/1230 027/067 10/1210 035/084 10/0905

XALG - WEATHERFLOW ALLIGATOR REEF LIGHT
24.85 -80.62 977.0 10/1204 106/062 10/1159 106/081 10/1159

MLRF1 - MOLASSES REEF LIGHT CMAN
25.01 -80.38 884.7 10/1300 I 130/065 10/1200 140/080 10/1300
140/065 10/1300
ANEMOMETER HEIGHT 15.8 M (51.8 FT AMSL)

XCFL - WEATHERFLOW CARYSFORT REEF LIGHT
25.23 -80.21 986.8 10/1325 120/062 10/1240 124/081 10/1335
ANEMOMETER HEIGHT 47 FEET AMSL


C. STORM TOTAL RAINFALL FROM 0400 UTC SEP 09 UNTIL 0400 UTC SEP 12
---------------------------------------------------------------------
CITY/TOWN COUNTY ID RAINFALL
LAT LON (IN)
DEG DECIMAL
---------------------------------------------------------------------
KEY DEER NATIONAL WILDLIFE REFUGE RAWS (BIG PINE KEY)
24.72 -81.39 MONROE TS607 12.54

5.3 SW KEY LARGO
25.05 -80.49 MONROE COCORAHS 9.98
RAINFALL RECOVERED FOR PERIOD SEP 08 THROUGH SEP 15

0.9 SSW CUDJOE KEY
24.66 -81.51 MONROE COCORAHS 9.76
RAINFALL RECOVERED FOR PERIOD SEP 09 THROUGH SEP 18

6.8 ENE MARATHON
24.74 -80.98 MONROE COCORAHS 9.42
RAINFALL RECOVERED FOR PERIOD SEP 09 THROUGH SEP 19

1.3 NE KEY WEST
24.57 -81.76 MONROE COCORAHS 9.03

1 WSW BAHIA HONDA KEY
24.66 -81.28 MONROE BPNF1 7.58
RAINFALL RECOVERED FOR PERIOD SEP 06 THROUGH SEP 22

NORTH KEY LARGO HANDAR
24.19 -80.35 MONROE KLNF1 7.16

6.2 NE KEY LARGO
25.17 -80.37 MONROE COCORAHS 6.93
RAINFALL RECOVERED FOR PERIOD SEP 07 THROUGH SEP 13

1 SW KEY WEST
24.55 -81.79 MONROE KKEY 5.70

REMARKS (UPDATED): DUE TO INCOMPLETE RAINFALL RECORDS FROM FAILED
AUTOMATED STATIONS AND MANDATORY RESIDENTIAL EVACUATION OF MONROE
COUNTY FLORIDA KEYS...PLEASE NOTE SPECIFIC RAINFALL RECOVERY
PERIODS AS RESIDENTS AND PARTNERS RETURNED TO REPORT TOTAL
RAINFALL.


D. INLAND FLOODING...
---------------------------------------------------------------------
MONROE FLORIDA KEYS...RAINFALL FLOODING OF 6 TO 18 INCHES IN DEPTH
OBSERVED IN OCEAN REEF DURING MONROE EOC CONTINUITY OF OPERATIONS
CLEARLY DISTINGUISHABLE FROM STORM SURGE. RAINFALL ON TOP OF
EXISTING STORM SURGE RESULTED IN TOTAL WATER HEIGHT 6 TO 10 INCH
HIGHER STORM SURGE VALUES IN NEW TOWN KEY WEST PER MEASURED WATERLINES.

REMARKS: STORM SURGE VALUES GREATLY EXCEEDED POTENTIAL RAINFALL
FLOOD DEPTHS ACROSS MOST AREAS OF THE FLORIDA KEYS AND WILL B
(TOP OF THE 5TH STOREY ABOVE GROUND)E VERY
DIFFICULT TO DISTINGUISH.

---------------------------------------------------------------------

E. MAXIMUM STORM SURGE AND STORM TIDE...
OFFICIAL TIDE GAUGES NOTED WITH LEADING G
---------------------------------------------------------------------

COUNTY CITY/TOWN SURGE TIDE DATE/ BEACH
OR LOCATION (FT) (FT) TIME EROSION
---------------------------------------------------------------------
MONROE G KYWF1-KEY WEST 2.77 2.73 10/1742 I
MONROE G KYWF1-KEY WEST 3.29 2.56 10/1424 I

MONROE G VCAF1-VACA KEY 2.77 2.21 11/0118 I
MONROE G VCAF1-VACA KEY 2.80 2.19 11/0130 I

MONROE G MANATEE BAY CR 4.05 10/1000 I

REMARKS: FOR EACH STATION...
...FIRST ROW DENOTES TIME OF MAX STORM TIDE IN FT NAVD88
...SECOND ROW DENOTES TIME OF MAX STORM SURGE IN FT
...MANATEE BAY CREEK USGS GAUGE

ADDITIONAL REMARKS:
BASED ON DAMAGE SURVEYS...THE ESTIMATED INUNDATION OR PEAK FLOODING
ABOVE GROUND (ABOVE MEAN HIGHER HIGH WATER - MHHW) REACHED 5 TO 8
FEET OVER PORTIONS OF THE LOWER AND MIDDLE KEYS. THIS INCLUDES
PORTIONS OF SUGARLOAF KEY...CUDJOE KEY...RAMROD KEY...BIG PINE
KEY...BAHIA HONDA KEY...VACA KEY (MARATHON AND KEY COLONY
BEACH)...AND DUCK KEY.

OFFICIAL GAUGES AT KEY WEST AND VACA KEY ARE LOCATED ON THE GULF OF
MEXICO COAST AND BAYSIDE RESPECTIVELY. KEY WEST STORM TIDE LEVELS
WERE OBSERVED TO BE CONSISTENT WITH OBSERVED STORM SURGE FLOODING
IN KEY WEST. VACA KEY BAYSIDE WAS IN THE LEE OF THE MAXIMUM SOUTH
WINDS WITH MAXIMUM STORM TIDE VALUES OCCURRING WELL AFTER HURRICANE
IRMA WAS CENTERED 35 MILES EAST-NORTHEAST OF FORT MYERS.


F. TORNADOES...
---------------------------------------------------------------------
(DIST)CITY/TOWN COUNTY DATE/ EF SCALE
LAT LON (DEG DECIMAL TIME(UTC) (IF KNOWN)
DESCRIPTION
---------------------------------------------------------------------

REMARKS: NO DISCERNABLE TORNADO DAMAGE PATHS WERE DETERMINED AT
THIS TIME. THERE WAS EVIDENCE OF NON-UPDRAFT-INDUCED MESO-VORTICY
DAMAGE RESULTING IN OPPOSITE FALL OF A CONTINUOUS STRETCH OF WOOD
AND HOLLOW SPUN CONCRETE POWER DISTRIBUTION POLES ALONG KEY DEER
BOULEVARD ALMOST TWO MILES NORTHWEST OF AN AREA OF LOCALLY EXTREME
WIND DAMAGE ON BIG PINE KEY.
THIS WIND DAMAGE LIKELY OCCURRED
WITHIN THE ALMOST TWO-HOUR PASSAGE OF THE EASTERN EYEWALL OF
HURRICANE IRMA.


G. STORM IMPACTS BY COUNTY...
---------------------------------------------------------------------

COUNTY DEATHS INJURIES EVACUATIONS
DESCRIPTION
---------------------------------------------------------------------
MONROE 9 SEE REMARKS SEE REMARKS


THE FOLLOWING REPORT IS PRELIMINARY AND MAY BE REVISED PENDING
OFFICIAL JURISDICTIONAL AND DIVISIONAL REPORTS.

REMARKS: FATALITY INFO RELEASED BY THE MONROE COUNTY SHERIFFS
OFFICE. THIS VALUE MAY BE REVISED PENDING RELEASE OF ADDITIONAL
INFORMATION FROM AN OFFICIAL MONROE COUNTY SOURCE. INCLUDES BOTH
DIRECT AND INDIRECT CAUSES.

MORE THAN 40 INJURIES WERE IMMEDIATELY REPORTED WITHIN ONE DAY OF
HURRICANE IRMA`S DEPARTURE...BUT TOTAL INJURIES BOTH DIRECT AND
INDIRECT ARE PENDING.

PRELIMINARY EVACUATION TOTALS PRIOR TO THE ARRIVAL OF HURRICANE IRMA
OUT OF APPROXIMATLEY 73,000 RESIDENTS OF MONROE COUNTY INDICATE
APPROXIMATELY A 75 PERCENT EVACUATION RATE.

MONROE LOWER KEYS...KEY WEST THROUGH LITTLE DUCK KEY

OVER BAHIA HONDA THROUGH LITTLE TORCH KEY...THE STRONGEST ESTIMATED
WINDS WERE EVIDENT...POSSIBLY ATTRIBUTABLE TO A MESO-VORTEX
CIRCULATION WITHIN THE EYEWALL.
A GENERAL PATH OF MAXIMUM WIND
DAMAGE OCCURRED FROM JUST SOUTH OF BIG PINE KEY PARK THROUGH
KEY DEER BOULEVARD NORTH OF SOUTH STREET.
COMPLETE ROOF STRUCTURE
FAILURE INVOLVING SNAPPED WOOD TRUSSES
WAS OBSERVED ON SEVERAL HOMES
ALONG WITH COMPLETE EXTERIOR WALL FAILURE ON A WATERFRONT HOME. THE
PATH CONTINUED ACROSS KEY DEER BOULEVARD WHERE UTILITY POLES BOTH OF
WOOD AND HOLLOW-SPUN CONCRETE DESIGN WERE SNAPPED WITH NUMEROUS
SPANS LYING IN COMPLETELY OPPOSITE DIRECTIONS...THE SOUTHERN SPANS
OPPOSITE TO THE PATH DIRECTION. PEAK WIND GUSTS ESTIMATED 150 TO 160
MPH ALONG THE NORTHERN SIDE OF THE POSSIBLE CIRCULATION.
ELSEWHERE
ACROSS BIG PINE KEY...SIGNFICANT ROOF LOSS/EXTERIOR WALL COLLAPSE OF
OLDER MOBILE HOMES...LARGE SECTIONS OF ROOF COVERINGS ALL
TYPES...SOFFET DAMAGE AND LARGE METAL ROOF...WALL...AND DOOR
FAILURES ON A MODERN METAL BUILDING SYSTEM INDICATED MORE WIDESPREAD
ESTIMATED PEAK WIND GUSTS OF 120 TO 130 MPH.


FROM RAMROD KEY THROUGH SUGARLOAF KEY...WIDESPREAD AND BUSINESS -
RESIDENTIAL ROOF COVERING DAMAGE OF ALL TYPES WAS OBSERVED...WITH
ISOLATED ROOF TRUSS OR GABLE END FAILURES OF OLDER DESIGN. IT WAS
NOTED A DIAGONAL METAL CROSS BRACE ON THE POWER TRANSMISSION LINE
ACROSS NILES CHANNEL BECAME DETACHED FROM ONE VERTICAL CONCRETE
COLUMN INDICATIVE OF SIGNIFICANT FLEXING OF THE TRANSMISSION TOWERS.
ESTIMATED PEAK WIND GUST 110 TO 120 MPH.

FROM LOWER SUGARLOAF THROUGH BIG COPPITT KEY...WIDESPREAD SMALL
RESIDENTIAL AND BUSINESS ROOF COVERINGS WITH ISOLATED STRUCTURAL
GABLE END OR OVERHANG DAMAGE WAS NOTED ESPECIALLY IN AREAS OF OPEN
NORTH WIND EXPOSURE. ISOLATED MOBILE HOME DESTRUCTION INCLUDING
COLLAPSE OF ALL WALLS...ALTHOUGH SOME MODERN MOBILE HOMES ADJACENT
TO PROPERTIES WITH SEVERE DESTRUCTION EXHIBITED FEW SIGNS OF
COSMETIC DAMAGE. ESTIMATED PEAK WIND GUSTS 100 TO 110 MPH.

FROM BOCA CHICA KEY THROUGH KEY WEST...LOSSES OF ROOF
COVERINGS...SOFFET DAMAGE TO RESIDENTIAL HOMES AND CONDOMINIUMS WERE
NOTED...WITH TWO LODGING PROPERTIES INDICATED WITH GABLE END WOOD
TRUSS FAILURES OF BOTH MID-RISE AND TWO-STOREY DESIGN. PEAK
ESTIMATED WIND GUSTS 90 TO 100 MPH...ALTHOUGH THE MID-RISE ROOF
STRUCTURE FAILURE LOCATED WITH OPEN NORTH WIND EXPOSURE OFF THE GULF
OF MEXICO MAY HAVE INDICATED ISOLATED STRONGER WIND GUSTS OF 100
TO 110 MPH AT ROOFTOP LEVEL IN THIS HOUR.

TREE DAMAGE WAS WIDESPREAD AND EXTENSIVE.


MONROE MIDDLE KEYS...PIGEON KEY/MARATHON THROUGH CRAIG KEY

WIND DAMAGE FROM LONG KEY/LAYTON THROUGH GRASSY KEY INCLUDED SEVERAL
SECTIONS OF PULLED METAL BUILDING SYSTEM WALL PANELS...DAMAGE TO
BUILT-UP AND SHINGLE ROOF COVERINGS...VINYL SIDING...AND PLASTIC
PANELED SIGNS. PEAK WIND GUSTS ESTIMATED 90 TO 100 MPH.

THE FOLLOWING REPORT IS PRELIMINARY AND MAY BE REVISED PENDING
OFFICIAL JURISDICTIONAL AND DIVISIONAL REPORTS.
IN THE KEY COLONY BEACH AND MARATHON VICINITY...AREAL OVERFLIGHT
FROM LOCAL AGENCIES REVEALED SIGNIFICANT ROOF COVERING LOSS AND
ISOLATED ROOF TRUSS DAMAGE ON OLDER DESIGN OCEANFRONT HOMES. OLDER
RETAIL STORES AND A STRIP MALL DISPLAYED COMPLETE UPLIFT AND
COLLAPSE OF ROOF STRUCTURES OF BOX TRUSS TYPE...WHILE MODERN DESIGN
STRUCTURES DISPLAYED SIGNIFICANT SECTIONS OF ROOF COVERING
LOSS...INCLUDING METAL PANEL-OVER WOOD SHEATHING AND BUILT-UP
TAR/RUBBER COVERINGS. SOME OLDER SERVICE STATION CANOPIES DISPLAYED
COLUMN BUCKLING WHEREAS MODERN DESIGNS PERFORMED WELL OR HAD SLIGHT
RACKING. SIGNIFICANT ROOF PANEL DAMAGE TO MOBILE HOMES OVER BOTH
OLDER AND MODERN DESIGN. WHILE TRAFFIC SIGNAL MASTS REMAINED IN
PLACE SOME HORIZONTALLY MOUNTED SIGNALS WERE STILL BLOWN 90 DEGREES
OUT OF ALIGNMENT. PEAK WIND GUSTS ESTIMATED 100 TO 115 MPH.

TREE DAMAGE WAS WIDESPREAD AND EXTENSIVE.


MONROE UPPER KEYS...LOWER MATECUMBE KEY THROUGH OCEAN REEF

WIND DAMAGE FROM OCEAN REEF THROUGH KEY LARGO WAS CONSISTENT WITH
ESTIMATED PEAK GUSTS NEAR 90 MPH WITH LIMITED LOSSES OF BUILT-UP
ROOF COVERINGS...AND METAL FASCIA FROM GAS STATION CANOPIES. SOME
OLDER STRIP MALLS IN KEY LARGO DISPLAYED LARGE LOSSES OF SHINGLE AND
BARRELL TILE COVERINGS.

IN TAVERNIER...MODERN DESIGN LARGE METAL BUILDING SYSTEMS DISPLAYED
FAILURE OF OVERHEAD DOORS ON EAST AND SOUTHEAST-FACING SIDES...WITH
OLDER DESIGNS INCLUDING SOME PULLED EXTERIOR SHEET PANELS. PEAK
GUSTS NEAR 100 MPH ESTIMATED. SIGN DAMAGE WAS MORE PREVALENT THAN IN
KEY LARGO.

IN ISLAMORADA...WIND ESTIMATION AMONG MOBILE HOMES WAS DIFFICULT DUE
TO IMPACTS OF STORM SURGE FLOODING...HOWEVER ROOF PANELS WERE
STRIPPED FROM SOME HOMES ALONG WITH VINYL SIDING DAMAGE ON MODERN
SINGLE FAMILY HOMES. ONE SERVICE STATION CANOPY WAS COMPLETELY
OVERTURNED...HOWEVER THERE WAS NO DISCERNABLE DAMAGE TO THE
FOUNDATION FLANGES OR COLUMNS. PEAK WIND GUSTS ESTIMATED AT 90 TO
100 MPH.

TREE DAMAGE WAS WIDESPREAD AND EXTENSIVE.


THROUGHOUT THE KEYS--WIDESPREAD LOSS OF ELECTRIC POWER...CELLULAR
COMMUNICATIONS AND WATER PRESSURE OCCURRED.
MOST POWER PROBLEMS WERE
DUE TO FAILURE OF DISTRIBUTION SYSTEMS...ALTHOUGH SIGNICANT
INSULATOR DAMAGE OCCURRED NEAR THE EAST END OF LONG KEY ON THE
TRANSMISSION LINE. THE WATER TRANSMISSION PIPE WAS LARGELY
INTACT
...HOWEVER NUMEROUS NEIGHBORHOOD DISTRIBUTION LEAKS OCCURRED
AS TREES UPROOTED. NO COMMUNICATIONS TOWERS WERE REPORTED COLLAPSED
OR DEFORMED
...ALTHOUGH MOUNTED ANTENNAS ON THE TOWERS WERE DAMAGED
OR FELL OUT OF ALIGNMENT. A FEW MICROWAVE RELAY DISHES WERE TORN
FROM THEIR TOWERS.
WIDESPREAD DAMAGE TO TELECOM AND FIBER CABLES DUE
TO FALLING TREES AND DIRECT WIND IMPACTS STRIPPING FROM POLES AND
BEING STRETCHED ACROSS STREETS.



$$

LEGEND:
I-INCOMPLETE DATA
E-ESTIMATED

RIZZO/MORELAND


http://forecast.weather.gov/product.php?site=NWS&product=PSH&issuedby=KEY
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Re: ATL: IRMA - Post-Tropical - Discussion

#12428 Postby CrazyC83 » Thu Oct 12, 2017 11:50 pm

Shell Mound wrote:The National Weather Service in Key West has completed its post-storm survey. Based on the survey, the strongest estimated wind gusts (~139 knots) apparently occurred in connection with a mesoscale feature and did not represent the actual winds in the eyewall. The highest representative gusts in the area of peak damage were ~113 knots. If true, these results would indicate that Irma probably weakened to below Category-4 status by the time it struck the lower Florida Keys. Peak gusts of ~113 knots would suggest maximum sustained winds of about 95 to 100 knots, making Irma a high-end Category-2 or low-end Category 3 over the Keys—about the same strength as that at its second landfall over Marco Island. However, aircraft data did support surface winds of 110 knots, shortly after Irma's passage over the Keys, and the aircraft may have missed the strongest winds. The influence of dry-air intrusion and shear could indicate that those winds were not mixing efficiently to the surface. In that case, Irma would have been closer to a high-end Category-2 or low-end Category-3 hurricane over the Keys and southwestern mainland of Florida, though gusts would have easily been much higher, thanks to strong convective downbursts in the northern eyewall.

http://forecast.weather.gov/product.php?site=NWS&product=PSH&issuedby=KEY


The highest Recon winds I could find near Keys landfall were about 108 kt. That would create agreement with an intensity of 110 kt there, which I believe was the landfall intensity (the record I think will be gone in post-analysis). As for the mainland landfall, the most notable observation was a 99 kt sustained wind from a storm chaser. As the sustaining period was uncertain and the spatial data was very small, that piece of data alone makes for a final landfall intensity of 105 kt in my opinion.
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Re: ATL: IRMA - Post-Tropical - Discussion

#12429 Postby Alyono » Fri Oct 13, 2017 12:34 pm

what may work in Irma's favor is that surface winds were quite a bit above flight level winds when it struck Naples. So 108 kts may equate to 115 kts in this case at the Keys
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Re: ATL: IRMA - Post-Tropical - Discussion

#12430 Postby Shell Mound » Sun Oct 15, 2017 6:26 pm

Alyono wrote:what may work in Irma's favor is that surface winds were quite a bit above flight level winds when it struck Naples. So 108 kts may equate to 115 kts in this case at the Keys

Does anyone have a decent image from the lower Keys depicting Category-4 wind damage to coconut palms and other strong vegetation and/or structures? So far I have not found "stripped" palms down to the bud, which one typically sees in winds of major hurricane intensity...likewise, the most significant roof damage appears to have been to weaker structures. Many trees, including those that shed easily in a storm, still have a number of leaves left. (I used this excellent resource to find clear visual indicators of Category-4 winds, but struggled to find them.)
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Re: ATL: IRMA - Post-Tropical - Discussion

#12431 Postby galaxy401 » Wed Dec 13, 2017 8:17 pm

http://www.businessinsider.com/most-goo ... ay-2017-12

Hurricane Irma was the most Googled term of 2017.
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I don't get hurricanes here but I do get their remnants.

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Re: ATL: IRMA - Post-Tropical - Discussion

#12432 Postby Shell Mound » Fri Feb 23, 2018 7:40 pm

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