SE TX weather thread #3 - windy and cooler Wednesday

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Extremeweatherguy
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#381 Postby Extremeweatherguy » Fri Nov 10, 2006 3:54 pm

CaptinCrunch wrote:
Extremeweatherguy wrote:
CaptinCrunch wrote:Pacific cool front pushed through the D/FW metroplex around 9:30am, N/NW winds are around 14mph. The forecast high for today is 75, but the front did come thru earlier then expected, so high's may fall short, right now it's 66 at 11:12 am and as the cooler air filters in temps should level off soon.

GFS morning run have backed off any major cold fronts coming thru over the few days, with only cool pacific air being the main factor. Weekend high's (65) will be just below the normal (67) for this time of year. Thing's look to be rather up and down with temps thru the 19th but, buy the 23rd-24th thing may be different.

There is bitter cold air in western and central Canada with the early snow pack, and the polar vortex is nearby instead of across the continent in Siberia, and once the cold is too heavy it will spill into the Con-US. I'm thinking the EPO will go negative at the end of November, the forecast is showing the EPO going back to neutral by the 20th or so, and the NOA will also be heading negative at that time, so I still think that the Con-US will see colder air by late November and most likely by early December. Also the MJO has shown signs of strengthening so that will also play into the game of when the colder air spills south.

I feel that by Thanksgiving the weather pattern will be quite different with a large area of the U.S from the Rockies east seeing it's coldest weather of the season, and New Yorkers may be watching the annual Macy's Thanksgiving parade in the snow.
That is a very good assessment Cpt. Crunch. I think you will probably end up right on that. JB would also support your analysis as he believes that most of the nation east of the rockies will be chilly to end out the month.

On another note, I can NOT wait for that cooler air you are seeing right now to work down this way. Right now it is in the upper 80s and very humid here in Houston.

BTW: JBs very latest post agrees with you almost exactly. He is saying that the cold can not come down and have any "staying power" until the 40-day wave of the MJO comes east. He said that there will be attempts at cold (including the front next week), but he said the CORE of the cold in western canada will likely not come until December. However, he said that when it does come full force that it could be a major event! Before it comes though, he said that days 10-20 could become warm again for the nations midsection. Eventually though, this build up of cold air will likely mean a parka event for Texas and a true blue-norther. Can't wait...


EWG,

I don't subcribe to JB so that is interesting about what he said. I may be early on my assessment and JB may be late so the end of Nov may very well be the bullseye on the change over to a colder patteren.
That could very well be the case.

What I wonder is if we could potentially get another event similar to 1989, where each front got stronger and stronger before finally peaking by the time of the 3rd or 4th arctic front? It would be cool (no pun intended) if that could happen again this year. All I want is one snowfall and I will be happy for the rest of the winter. :wink:
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#382 Postby gboudx » Fri Nov 10, 2006 4:03 pm

Extremeweatherguy wrote:All I want is one snowfall and I will be happy for the rest of the winter. :wink:


Liar. :wink:

What, if any cold must hold off until after Thanksgiving. It has to. No ice or sleet in DFW on the Friday after. Not because I want to shop until I drop, but because we fly back from Disney that day, and I don't want a 4 hour commute home from DFW airport.
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#383 Postby Extremeweatherguy » Fri Nov 10, 2006 4:45 pm

AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE HOUSTON/GALVESTON TX
330 PM CST FRI NOV 10 2006

.DISCUSSION...COLD FRONT APPROACHING THE NORTHWEST PORTIONS
OF THE CWA THIS AFTERNOON AND THE CAP ACROSS SOUTHEAST TEXAS
CONTINUES TO KEEP A LID ON ANY CONVECTION DEVELOPING.
HOWEVER...BELIEVE A SLIGHT CHANCE OF SHOWERS AND THUNDERSTORMS
IS WARRANTED ACROSS THE EASTERN AND SOUTHERN PORTIONS OF THE
CWA THIS EVENING AS THE BOUNDARY MAY STILL ERODE THE CAP AS
THE FRONT MOVES INTO THE AREA TONIGHT. IN ADDITION...SURFACE
INSTABILITIES REMAIN FAIRLY UNSTABLE WITH LIFTING INDICES BETWEEN
-4 AND -6 IN GENERAL. CANADIAN AIRMASS ACROSS THE CENTRAL UNITED
STATES IS EXPECTED TO FILTER INTO THE AREA TONIGHT INTO SATURDAY
IN THE WAKE OF THE FRONT WHICH WILL PROVIDE COOLER TEMPERATURES
THROUGH THE WEEKEND. THE SURFACE RIDGE ACROSS THE CENTRAL U.S. WILL SHIFT
EASTWARD SUNDAY ALLOWING MOISTURE OVER THE SOUTHWEST GULF OF
MEXICO TO ADVECT NORTHWARD SUN NIGHT. WILL KEEP MENTION OF SLIGHT
CHANCE OF SHOWERS SUN NIGHT AND CHANCE OF SHOWERS AND
THUNDERSTORMS MONDAY AS A WEAK COLD FRONT MOVES INTO CENTRAL TX
MON AFTERNOON. RAIN CHANCES SHOULD DIMINISH MON NIGHT AS A 500MB
SHORTWAVE TROUGH OVER THE SOUTHERN PLAINS MOVES EASTWARD. LOW
PRESSURE IS PROGGED TO DEVELOP OVER THE NORTHERN PLAINS TUESDAY
AND MOVE SOUTHEAST WEDNESDAY AS A SIGNIFICANT TROUGH DEVELOPS
ACROSS THE CENTRAL U.S. TUES NIGHT AND MOVES EASTWARD BRINGING
ANOTHER STRONG COLD FRONT THROUGH SOUTHEAST TX LATE TUESDAY INTO
EARLY WEDNESDAY. BELIEVE ENOUGH MOISTURE WILL RETURN AHEAD OF THIS
FRONT TO WARRANT A SLIGHT CHANCE OF RAIN WITH FRONTAL PASSAGE TUES
NIGHT. HIGH PRESSURE WILL BUILD INTO EAST TX WEDNESDAY IN THE WAKE
OF THE FRONT AND THE 500MB TROUGH ACROSS THE EASTERN U.S. THURSDAY
WILL CONTINUE TO PROVIDE SUBSIDENCE THROUGH THE REST OF THE
PERIOD. 32


BTW: Areas north of I-10 will likely flirt with the upper 30s Sunday morning.
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#384 Postby double D » Fri Nov 10, 2006 5:19 pm

The front came through the hill country and the wind is gusting to 20 mph. It is still 84 degrees but the dewpoint is 39. Even though it is still warm outside it feels great due to the lower humidity compared to this morning.
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#385 Postby Extremeweatherguy » Fri Nov 10, 2006 5:34 pm

Though it will likely never be 'arctic' for us, the 18Z GFS certainly does look cooler:

http://www.nco.ncep.noaa.gov/pmb/nwprod ... _120.shtml
^^WED^^

http://www.nco.ncep.noaa.gov/pmb/nwprod ... _132.shtml
^^WED EVE/THURS MORN^^

http://www.nco.ncep.noaa.gov/pmb/nwprod ... _144.shtml
^^THURS^^

Though it will be progressive, it could still be quite strong. Looks like Wednesday may be one of those days where we hit our highs in the morning and drop during the day. This will probably be one of the strongest fronts so far this season with the potential for a very chilly Wednesday night (if skies clear and winds go calm).
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#386 Postby Extremeweatherguy » Fri Nov 10, 2006 6:19 pm

Looks like Houston could end up on the southern edge of a developing squall line this evening. We will have to watch (especially north of I-10) for the possibility of severe weather:

Image

MESOSCALE DISCUSSION 2189
NWS STORM PREDICTION CENTER NORMAN OK
0448 PM CST FRI NOV 10 2006

AREAS AFFECTED...SWRN AR INTO ERN TX

CONCERNING...SEVERE POTENTIAL...WATCH POSSIBLE

VALID 102248Z - 110015Z

POTENTIAL FOR A FEW SEVERE STORMS IS EXPECTED TO INCREASE ACROSS
DISCUSSION AREA THIS EVENING. CONVECTIVE TRENDS ARE BEING MONITORED
FOR A POSSIBLE WW ISSUANCE.

AS OF 2235Z...REGIONAL RADAR IMAGERY INDICATED DEEPENING MOIST
CONVECTION ALONG COLD FRONT FROM NEAR GGG TO 40 NNE CLL WITHIN A
WARM AND MOIST LOW-LEVEL AIR MASS WITH MLCAPES OF 1500-2500 J/KG AND
LITTLE OR NO CONVECTIVE INHIBITION. BASED ON LATEST TRENDS IN
SATELLITE IMAGERY...IT APPEARS THAT FORCING FOR ASCENT ASSOCIATED
WITH THE TRAILING PORTION OF A LEAD SHORT WAVE TROUGH MOVING INTO
CNTRL AR AND NWRN LA APPEARS TO BE CONTRIBUTING TO THIS
DEVELOPMENT..IN ADDITION TO LOW-LEVEL FRONTAL CONVERGENCE.

REGIONAL PROFILERS SHOW THAT DEEP-LAYER VERTICAL SHEAR IS MARGINALLY
STRONG /30-35 KT IN THE LOWEST 6 KM AGL/ TO SUPPORT STORM
ORGANIZATION GIVEN THE MODERATE INSTABILITY. ANY STORMS THAT
DEVELOP AND BECOME SUSTAINED WILL BE CAPABLE OF LOCALLY DAMAGING
WINDS AND PERHAPS SOME SEVERE HAIL.


..MEAD.. 11/10/2006


Image
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#387 Postby Yankeegirl » Fri Nov 10, 2006 7:14 pm

Uh, thats alot south of I 10!! :eek:
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#388 Postby Extremeweatherguy » Fri Nov 10, 2006 7:22 pm

Yankeegirl wrote:Uh, thats alot south of I 10!! :eek:
what is? The storms right now are north of I 10.
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#389 Postby Extremeweatherguy » Fri Nov 10, 2006 7:38 pm

the line of storms west of Brenham doesn't seem to be strengthening any. We will need to watch it closely though, because at any moment it may try to become like the line in NE Texas and go severe. The line (at whatever strength it may achieve) should be in the Houston area by around 9pm.

BTW, it not looks like a new line may be forming to the east of the old one. We will need to watch that one too.
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#390 Postby Extremeweatherguy » Fri Nov 10, 2006 7:40 pm

I just stepped outside and it looks like that second line to the east is really exploding. There is vivid lightning and thunder going off everywhere to my NW. Looks pretty violent off that way.

update: It has become even more furious (lightning now going every second). I wouldn't be surprised to see a warning soon. It also looks like the brunt of it will hit southern montgomery county. Watch out the woodlands and conroe!

I am also concerned that the line will try and build back SW with time. We shall see..
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#391 Postby Extremeweatherguy » Fri Nov 10, 2006 8:00 pm

Image

DAY 1 CONVECTIVE OUTLOOK
NWS STORM PREDICTION CENTER NORMAN OK
0638 PM CST FRI NOV 10 2006

VALID 110100Z - 111200Z

...THERE IS A SLGT RISK OF SVR TSTMS FROM THE UPPER TX COASTAL PLAIN
NEWD ACROSS THE MS VALLEY TO THE LOWER OH VALLEY/SRN IL...

...UPPER TX COASTAL PLAIN NEWD ACROSS THE LOWER/MID MS VALLEY...
PRONOUNCED SURFACE PRESSURE RISES ACROSS THE CNTRL/SRN PLAINS WILL
DRIVE A STRONG COLD FRONT EWD ACROSS THE MID MS VALLEY AND SEWD OVER
THE ARKLATEX AND TX GULF COAST REGIONS THROUGH TONIGHT. MEANWHILE...
A STRONG MID/UPPER LEVEL TROUGH SPREADING EAST TOWARD IA/MO WILL
CONTINUE TO SUPPORT A SURFACE CYCLONE TRACKING EAST ALONG A WARM
FRONT STRETCHING FROM IL/IND EWD TO OH AND WRN PA.

EVENING ANALYSIS DEPICTED A RELATIVELY NARROW INSTABILITY AXIS AHEAD
OF THE ADVANCING COLD FRONT AND NEAR THE SURFACE LOW...FROM SCNTRL
IL SWWD ACROSS THE BOOTHEEL OF MO...AND THEN ACROSS MUCH OF ERN/SRN
AR...NWRN LA...AND EAST TX. STRONGER SHEAR AND FORCING WERE
JUXTAPOSED WITH MARGINAL INSTABILITY FROM ERN MO ACROSS CNTRL IL
WHERE PRIMARILY ELEVATED POST-FRONTAL DEEP CONVECTION COULD STILL
POSE A THREAT FOR HAIL.

FROM SCNTRL IL AND THE MO BOOTHEEL SSWWD ACROSS AR/NWRN LA AND EAST
TX...LINEAR FORCING/STRONG LIFT ALONG THE ADVANCING COLD FRONT WILL
ACT ON STRONGLY UNSTABLE AIR MASS AND CONTINUE TO PROMOTE SEVERE
TSTMS OVER THE NEXT SEVERAL HOURS. WHILE SHEAR AND LARGE SCALE
FORCING DO LESSEN WITH SWWD EXTENT...LIFT ALONG THE ADVANCING
BOUNDARY HAS BEEN RESPONSIBLE FOR STORM INITIATION AND UPDRAFT
PERSISTENCE ACROSS CNTRL AR INTO NWRN LA AND ERN TX THIS EVENING.
EVENING RAOBS FROM LITTLE ROCK AND SHREVEPORT INDICATE MORE THAN
ADEQUATE SHEAR AND INSTABILITY TO SUPPORT SUPERCELLS WITH
HAIL...HIGH WINDS....AND PERHAPS A BRIEF TORNADO.

EXPECT ONGOING QUASI-CELLULAR/SUPERCELLULAR ACTIVITY TO GRADUALLY
EVOLVE TOWARD SQUALL LINE SEGMENTS AS THE EVENING PROGRESSES AND
CONVECTIVE COLD POOLS DEEPEN ALONG THE FRONT. TORNADO/DAMAGING WIND
AND HAIL THREAT SHOULD EXIST FOR A FEW MORE HOURS AS STORMS MOVE
TOWARD THE MS RIVER AND THE LOWER OH VALLEY AREAS...AS WELL AS FROM
NRN LA ACROSS ERN TX. WITH LOSS OF DIURNAL HEATING...PREFRONTAL
BOUNDARY LAYER AIR MASS SHOULD STABILIZE AND SEVERE THREAT IS
EXPECTED TO GRADUALLY DIMINISH AS CONVECTION MOVES EAST OF THE MS
RIVER AND OFF THE UPPER TX GULF COAST LATER TONIGHT.
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#392 Postby Yankeegirl » Fri Nov 10, 2006 8:00 pm

Very good lightning here to my north... very nice cloud to cloud lightning with a few bolts going to the ground... very imoressive... and a few rumbles to go with it...
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#393 Postby Yankeegirl » Fri Nov 10, 2006 8:07 pm

Special Weather Statement

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE HOUSTON/GALVESTON TX
658 PM CST FRI NOV 10 2006

TXZ199-212-213-110500-
MONTGOMERY-WALLER-HARRIS-
INCLUDING THE CITIES OF...THE WOODLANDS...CONROE...WILLIS...
HEMPSTEAD...PRAIRIE VIEW...BROOKSHIRE...HOUSTON...PASADENA...
KATY...TOMBALL...HUMBLE
658 PM CST FRI NOV 10 2006

...STRONG THUNDERSTORMS DEVELOPING NEAR AND AHEAD OF FAST MOVING
COLD FRONT...

A COLD FRONT IS MOVING RAPIDLY ACROSS SOUTHEAST TEXAS THIS EVENING.
AT 650 PM...THE FRONT WAS LOCATED NEAR BRENHAM EXTENDING TO NEAR
HUNTSVILLE AND TO NEAR GROVETON. SCATTERED THUNDERSTORMS WILL
CONTINUE TO DEVELOP NEAR AND AHEAD OF THIS FRONT. THE STRONGER
STORMS ARE CAPABLE OF PRODUCING SMALL HAIL AND GUSTY WINDS TO 45
MPH. EXPECT RAINFALL RATES OF 1/2 TO AN INCH AN HOUR. AT THE
CURRENT RATE OF MOVEMENT...THE FRONT IS EXPECTED TO MOVE ACROSS
THE HOUSTON METRO AREA AROUND 930 PM AND SHOULD REACH THE COAST
AROUND MIDNIGHT.











$$
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#394 Postby double D » Fri Nov 10, 2006 8:12 pm

It looks like the line is backbuilding to the southwest. Hopefully it won't become severe and weaken as they approach Houston.
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#395 Postby Extremeweatherguy » Fri Nov 10, 2006 8:17 pm

double D wrote:It looks like the line is backbuilding to the southwest. Hopefully it won't become severe and weaken as they approach Houston.
looks like that won't happen..

SEVERE THUNDERSTORM WARNING
TXC201-473-110200-
/O.NEW.KHGX.SV.W.0168.061111T0114Z-061111T0200Z/

BULLETIN - EAS ACTIVATION REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE HOUSTON/GALVESTON TX
714 PM CST FRI NOV 10 2006

THE NATIONAL WEATHER SERVICE IN LEAGUE CITY HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
HARRIS COUNTY IN SOUTHEAST TEXAS
WALLER COUNTY IN SOUTHEAST TEXAS

* UNTIL 800 PM CST

* AT 706 PM CST...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
SEVERE THUNDERSTORM. THIS STORM WAS LOCATED 5 MILES NORTHEAST OF
WALLER...MOVING SOUTH AT 10 MPH.

* LOCATIONS IMPACTED INCLUDE...
NORTHWESTERN HARRIS COUNTY...
EASTERN WALLER COUNTY...

PLEASE REPORT SEVERE WEATHER TO THE COUNTY SHERIFF...LOCAL POLICE...
OR DEPARTMENT OF PUBLIC SAFETY. THEY WILL RELAY YOUR REPORT TO THE
NATIONAL WEATHER SERVICE.
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#396 Postby Yankeegirl » Fri Nov 10, 2006 8:20 pm

It looks like there is a secondary line now popping up behind the severe line... Just popps up outta no where!!
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#397 Postby Yankeegirl » Fri Nov 10, 2006 8:22 pm

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#398 Postby Extremeweatherguy » Fri Nov 10, 2006 8:29 pm

I have a feeling this is going to be an intense line of storms!
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#399 Postby double D » Fri Nov 10, 2006 8:31 pm

I guess I was wrong as I typed they went severe. I wonder why the Houston NWS sometimes doesn't specify why the thunderstorm is severe? Ex. size of hail or wind speed. Just curious as I notice that the majority of other NWS do specify. I hope this make sense.
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#400 Postby double D » Fri Nov 10, 2006 8:37 pm

new severe thunderstorm warning:

SEVERE THUNDERSTORM WARNING
TXC373-110200-
/O.NEW.KHGX.SV.W.0169.061111T0121Z-061111T0200Z/

BULLETIN - EAS ACTIVATION REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE HOUSTON/GALVESTON TX
721 PM CST FRI NOV 10 2006

THE NATIONAL WEATHER SERVICE IN LEAGUE CITY HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
POLK COUNTY IN SOUTHEAST TEXAS

* UNTIL 800 PM CST

* AT 712 PM CST...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
SEVERE THUNDERSTORM. THIS STORM WAS LOCATED 6 MILES SOUTHWEST OF
DIBOLL...MOVING SOUTH AT 10 MPH.

* LOCATIONS IMPACTED INCLUDE...
CORRIGAN...

PLEASE REPORT SEVERE WEATHER TO THE COUNTY SHERIFF...LOCAL POLICE...
OR DEPARTMENT OF PUBLIC SAFETY. THEY WILL RELAY YOUR REPORT TO THE
NATIONAL WEATHER SERVICE.

LAT...LON 3113 9480 3108 9490 3086 9485 3090 9464
3103 9468
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