ATL: ALBERTO - Post-Tropical

[Kazmit]

Definitely think this will be classified as fully tropical in the post-season.

[WeatherGuesser]

Wow, just heard thunder for the first time!

I'm hearing it, but I'm a long ways from you. Small cells on the far outer bands. Some might not even consider it part of this storm, but the satellite images sure seem like it is.

[Aric Dunn]

landfall sea grove beach looks imminent.

[cycloneye]

@NHC_Surge
An @noaaocean tide station at Apalachicola recently reported a peak observed water level of 2.99 ft MHHW (or inundation above ground level).

[Ubuntwo]

Sustained winds of 41MPH in Tyndall, with gusts to 59.

[JaxGator]

Well, most of the day had been thankfully mostly sunny here, but now more rainbands are moving through. Alberto's radar and visible presentation has improved since this morning. It looks a lot more tropical now for sure.

[Aric Dunn]

Looks like we have Landfall. sea grove beach..

[Dean4Storms]

I'm getting gusts now into the 30's. Heavy rain.

[Dean4Storms]

Bottomed out at 29.39" barometric pressure.

[kthmcc7319]

I'm getting gusts now into the 30's. Heavy rain.

Same across the bay here in Choctaw Beach

[cycloneye]

BULLETIN
Subtropical Storm Alberto Advisory Number 15
NWS National Hurricane Center Miami FL AL012018
400 PM CDT Mon May 28 2018

...CENTER OF ALBERTO MAKING LANDFALL NEAR LAGUNA BEACH FLORIDA...
...HEAVY RAINFALL AND FLASH FLOODING OCCURRING OVER PARTS OF THE
FLORIDA PANHANDLE...


SUMMARY OF 400 PM CDT...2100 UTC...INFORMATION
----------------------------------------------
LOCATION...30.3N 85.9W
ABOUT 15 MI...20 KM WNW OF PANAMA CITY FLORIDA
MAXIMUM SUSTAINED WINDS...45 MPH...75 KM/H
PRESENT MOVEMENT...N OR 355 DEGREES AT 9 MPH...15 KM/H
MINIMUM CENTRAL PRESSURE...994 MB...29.36 INCHES


WATCHES AND WARNINGS
--------------------
CHANGES WITH THIS ADVISORY:

All watches and warnings east of the Aucilla River have been
discontinued.

SUMMARY OF WATCHES AND WARNINGS IN EFFECT:

A Storm Surge Watch is in effect for...
* Aucilla River to Mexico Beach

A Tropical Storm Warning is in effect for...
* Aucilla River to the Alabama/Florida border

A Storm Surge Watch means there is a possibility of life-
threatening inundation, from rising water moving inland from the
coastline, in the indicated locations. For a depiction of areas at
risk, please see the National Weather Service Storm Surge
Watch/Warning Graphic, available at hurricanes.gov.

For storm information specific to your area, including possible
inland watches and warnings, please monitor products issued by your
local National Weather Service forecast office.


DISCUSSION AND OUTLOOK
----------------------
At 400 PM CDT (2100 UTC), the center of Subtropical Storm Alberto
was located near latitude 30.3 North, longitude 85.9 West. The
storm is moving toward the north near 9 mph (15 km/h). A faster
northward to north-northwestward motion is expected during the next
few days. On the forecast track, the center of Alberto will move
over Alabama later tonight and Tuesday. The system is forecast to
move over the Tennessee Valley on Tuesday and into the Ohio Valley
and Great Lakes region on Wednesday and Thursday.

Maximum sustained winds are near 45 mph (75 km/h) with higher gusts.
Steady weakening is forecast as Alberto moves inland, and
Alberto is expected to become a subtropical depression tonight or
early Tuesday, and degenerate into a remnant low by Tuesday
afternoon.

Winds of 40 mph extend outward up to 90 miles (150 km) from the
center. The official observing site at Panama City recently
reported a sustained wind of 40 mph (65 km/h) and a gust to 59 mph
(95 km/h). An automated weather station near St. Andrew Bay
measured a sustained wind of 44 mph (70 km/h) with a gust to 52 mph
(83 km/h) within the past couple of hours.

The estimated minimum central pressure is 994 mb (29.36 inches).


HAZARDS AFFECTING LAND
----------------------
RAINFALL: Alberto is expected to produce the following rain
accumulations through Tuesday:

The Florida panhandle across eastern and central Alabama and western
Georgia...4 to 8 inches, isolated 12 inches.

The Florida Keys and Florida peninsula...Additional 1 to 2 inches,
isolated 5 inches.

Rest of the Southeast and Tennessee Valley into the lower mid
Atlantic from Tennessee east through the Carolinas...2 to 6 inches.

Flooding and flash flooding are possible in the southeast United
States, including Florida.

WIND: Tropical storm conditions will continue within portions of
the warning area into this evening.

STORM SURGE: The combination of storm surge and the tide will cause
normally dry areas near the coast to be flooded by rising waters
moving inland from the shoreline. The water could reach the
following heights above ground somewhere in the indicated
areas if the peak surge occurs at the time of high tide...

Acuilla River to Mexico Beach...1 to 3 ft

A National Ocean Service tide gauge at Apalachicola measured a
water level of 2.99 ft above Mean Higher High Water earlier this
afternoon.

The deepest water will occur along the immediate coast. Surge-
related flooding depends on the relative timing of the surge
and the tidal cycle, and can vary greatly over short distances. For
information specific to your area, please see products issued by
your local National Weather Service forecast office.

TORNADOES: Isolated tornadoes are possible through tonight over
parts of Georgia and southeast Alabama.

SURF: Swells generated by Alberto will continue to affect the
eastern and northern Gulf Coast through Tuesday. These swells are
likely to cause life-threatening surf and rip current conditions.
For more information, consult products from your local weather
office.


NEXT ADVISORY
-------------
Next intermediate advisory at 700 PM CDT.
Next complete advisory at 1000 PM CDT.

$$
Forecaster Brown



Subtropical Storm Alberto Discussion Number 15
NWS National Hurricane Center Miami FL AL012018
400 PM CDT Mon May 28 2018

Satellite and NWS Doppler radar data indicate that the center of
Alberto is making landfall along the coast of the Florida panhandle
near Laguna Beach with maximum winds estimated at 40 kt. The
overall organization of the system has changed little throughout
the day as bands of convection have continued to develop primarily
over the northern portion of the circulation. Data from the Air
Force reconnaissance aircraft showed that the pressure continued to
slowly rise and it was estimated to be 994 mb on the last fix just
before 1700 UTC. Alberto should quickly weaken as the circulation
moves inland this evening and the system should become a depression
by late tonight or early Tuesday.

Alberto has been moving northward or 355/8 kt. The track forecast
reasoning has not changed from the previous advisory. The cyclone
should move northward to north-northwestward around the western
periphery of a mid-level ridge located over the western Atlantic
over the next couple of days. The system is forecast to be absorbed
by a frontal system over Canada in 3 to 4 days. The track guidance
remains in good agreement on this scenario and only slight changes
to the official forecast were required.

KEY MESSAGES:

1. Heavy rainfall will lead to a significant risk of flash flooding
across the Florida Panhandle, much of Alabama, and western Georgia
through tonight, spreading northward into northern Georgia, the
western Carolinas, and Tennessee on Tuesday.

2. A hazardous storm surge remains possible along portions of the
coast of the Florida panhandle through this evening. Residents in
the storm surge watch area are encouraged to follow guidance given
by their local government officials.

3. Tropical storm conditions are likely within portions of the
tropical storm warning through this evening.

4. Dangerous surf and rip current conditions will continue to
affect portions of the eastern and northern Gulf Coast through
Tuesday.


FORECAST POSITIONS AND MAX WINDS

INIT 28/2100Z 30.3N 85.9W 40 KT 45 MPH
12H 29/0600Z 32.0N 86.4W 30 KT 35 MPH...INLAND
24H 29/1800Z 34.3N 87.0W 25 KT 30 MPH...INLAND
36H 30/0600Z 37.0N 87.4W 20 KT 25 MPH...POST-TROP/REMNT LOW
48H 30/1800Z 40.1N 86.7W 15 KT 15 MPH...POST-TROP/REMNT LOW
72H 31/1800Z 46.2N 82.3W 15 KT 15 MPH...POST-TROP/REMNT LOW
96H 01/1800Z...ABSORBED BY FRONT

$$
Forecaster Brown

[cycloneye]

Makes landfall near Laguna Beach.

...CENTER OF ALBERTO MAKING LANDFALL NEAR LAGUNA BEACH FLORIDA...
...HEAVY RAINFALL AND FLASH FLOODING OCCURRING OVER PARTS OF THE
FLORIDA PANHANDLE...


SUMMARY OF 400 PM CDT...2100 UTC...INFORMATION
----------------------------------------------
LOCATION...30.3N 85.9W
ABOUT 15 MI...20 KM WNW OF PANAMA CITY FLORIDA
MAXIMUM SUSTAINED WINDS...45 MPH...75 KM/H
PRESENT MOVEMENT...N OR 355 DEGREES AT 9 MPH...15 KM/H
MINIMUM CENTRAL PRESSURE...994 MB...29.36 INCHES

[Aric Dunn]

Makes landfall near Laguna Beach.

...CENTER OF ALBERTO MAKING LANDFALL NEAR LAGUNA BEACH FLORIDA...
...HEAVY RAINFALL AND FLASH FLOODING OCCURRING OVER PARTS OF THE
FLORIDA PANHANDLE...


SUMMARY OF 400 PM CDT...2100 UTC...INFORMATION
----------------------------------------------
LOCATION...30.3N 85.9W
ABOUT 15 MI...20 KM WNW OF PANAMA CITY FLORIDA
MAXIMUM SUSTAINED WINDS...45 MPH...75 KM/H
PRESENT MOVEMENT...N OR 355 DEGREES AT 9 MPH...15 KM/H
MINIMUM CENTRAL PRESSURE...994 MB...29.36 INCHES

laguna beach is impossible.. there is two feeder band going through laguna.. ...

[Dean4Storms]

Ah....29.38" so guess I haven't bottomed out.

[Aric Dunn]

Ah....29.38" so guess I haven't bottomed out.

the center is very close to you.. a mile or two

[Dean4Storms]

I got underneath that strong convective band to the west of the center, very heavy rain and winds gusting into the 30's. Rain Rate hit 1.40" per hour.

[LarryWx]

Alberto made landfall as a 40 knot storm. This is tied for the 2nd highest May US GOM landfall strength with 1959's TS Arlene, which landfalled on LA on 5/30. The only more powerful one was way back in 1863!

[Dean4Storms]

My winds are beginning to veer from NNE toward the NNW to NW.

[cycloneye]

@DrRickKnabb
Salt water level at Apalachicola gage peaked at 3 feet above normally dry ground at the coast. That’s right at the threshold of life-threatening storm surge, so quite reasonable that @NHC_Atlantic and @NHC_Surge hoisted and have kept up storm surge watch for Florida Big Bend.

 https://twitter.com/DrRickKnabb/status/1001224896582750213

[lrak]

Are there currents that will head this to the NE fast or is it stuck like Harvey? Sad to say no swell for us.
Crestview FL storm total is up to 2 inches I hope this moves out fast