April: Warm & Muggy To End The Month. Showers Monday?

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TORNADO WARNING
NATIONAL WEATHER SERVICE HOUSTON/GALVESTON TX
102 PM CDT WED APR 4 2012

THE NATIONAL WEATHER SERVICE IN LEAGUE CITY HAS ISSUED A

* TORNADO WARNING FOR...
GALVESTON COUNTY IN SOUTHEASTERN TEXAS...
EXTREME NORTHEASTERN BRAZORIA COUNTY IN SOUTHEASTERN TEXAS...

* UNTIL 145 PM CDT

* AT 1259 PM CDT...DOPPLER RADAR INDICATED A SEVERE THUNDERSTORM
CAPABLE OF PRODUCING A TORNADO. THIS DANGEROUS STORM WAS LOCATED
NEAR ALVIN...AND MOVING SOUTHEAST AT 10 MPH. LARGE HAIL IS ALSO
EXPECTED.

* LOCATIONS IMPACTED INCLUDE...
ALVIN...SANTA FE AND HILLCREST.

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Code: Select all

SEVERE THUNDERSTORM WATCH OUTLINE UPDATE FOR WS 139
NWS STORM PREDICTION CENTER NORMAN OK
1255 PM CDT WED APR 4 2012

SEVERE THUNDERSTORM WATCH 139 IS IN EFFECT UNTIL 800 PM CDT
FOR THE FOLLOWING LOCATIONS

TXC007-025-039-047-057-061-131-157-167-175-215-239-247-249-261-
273-297-321-355-391-409-427-469-481-489-050100-
/O.NEW.KWNS.SV.A.0139.120404T1755Z-120405T0100Z/

TX
.    TEXAS COUNTIES INCLUDED ARE

ARANSAS              BEE                 BRAZORIA
BROOKS               CALHOUN             CAMERON
DUVAL                FORT BEND           GALVESTON
GOLIAD               HIDALGO             JACKSON
JIM HOGG             JIM WELLS           KENEDY
KLEBERG              LIVE OAK            MATAGORDA
NUECES               REFUGIO             SAN PATRICIO
STARR                VICTORIA            WHARTON
WILLACY

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HGX issues Severe Thunderstorm Warning for Brazoria County

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Brazoria County Emergency Management reports .5 inch rainfall rates in 10 minutes

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Hail damage reported in Alvin

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HGX issues Severe Thunderstorm Warning for Brazoria & Galveston Counties

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Pea sized hail reported W of League City

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From Jeff:

Severe Thunderstorm Watch has been issued for locations along and south of US 59 until 800pm



Air mass south of stationary frontal boundary has become very unstable with CAPE of 3000-400 J/kg and little to no capping. SW moving outflow boundary is colliding with this boundary and has produced a tornadic sueprcell over western Galveston County currently.



With continued heating this afternoon and inland moving seabreze which will collide with the stationary boundary near/along US 59 new thunderstorms may develop and become quickly severe. Boundary enhanced low level shear may provide an enhanced tornado threat near any low level boundaries that are in place across the region. Otherwise the main threats will be large damaging hail and strong winds.

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Baseball size hail reported in Alvin. HGX issues Severe Thunderstorm Warning for Brazoria County yet again.

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From Jeff:

Extremely dangerous thunderstorm producing frequent reports of baseball and golfball size hail moving toward the western end of Galveston Island. As this storm passed over Alvin there have been numerous reports of baseball size hail breaking windows of vehicles and houses in and around Alvin Community College.



This storm is nearing the northern side of west Bay and will be crossing into west Bay and western Galveston Island within the next 20 minutes. Although the radar is showing a weakening trend, this remains a dangerous storm.

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Folks in Matagorda, Wharton, Ft Bend, S Harris and Brazoria Counties heads up. Rapidly developing storms along and S of the HWY 59 Corridor may go severe shortly.

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HGX issues Severe Thunderstorm Warning for Brazoria & Matagorda Counties

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From NESDIS:

SATELLITE PRECIPITATION ESTIMATES..DATE/TIME 04/04/12 1901Z
SATELLITE ANALYSIS BRANCH/NESDIS---NPPU---TEL.301-763-8678
LATEST DATA USED: GOES-13 1845Z KUSSELSON
NOAA AMSU:1614Z DMSP SSMIS:1223Z
.
LOCATION...SE TEXAS...
.
ATTN WFOS...HGX...
ATTN RFCS...WGRFC...
.
EVENT...MICROWAVE PASS SHOWING DEEP PRECIPITABLE WATER WITH OFFSHORE
CONVECTIVE COMPLEX FOLLOWING ALONG OUTFLOW INTO SE TEXAS CONVECTION...
.
SATELLITE ANALYSIS AND TRENDS...NICE 1614Z NOAA AMSU PASS OVER THE WESTERN
GULF OF MEXICO SHOWING OUTFLOW HIGHER PRECIP WATER MOISTURE TRAILING
ALONG THE OUTFLOW AND BACK INTO THE SE TEXAS COAST. THIS WAS ALLOWING
SMALLER COMPLEX BRAZORIA INTO GALVESTON COUNTY TO HANG TOGETHER WITH
SOME EMBEDDED TRAINING CELLS. EAST EXTENT OF COMPLEX DRIFTING EAST AND
SE TOWARD GULF COAST...BUT BACK EDGE MOVING SLOWLY AND CONVECTIVE CELLS
TRYING TO FORM TO SOUTHWEST FOR POTENTIAL TRAINING SCENARIO...AT LEAST
BRAZORIA TO NEAR WEST/SW GALVESTON COUNTY. WITH GPS PW VALUES NEAR 1.6"
AND A FEW GOES SOUNDER VALUES EVEN HIGHER...CERTAINLY COULD GET AMOUNTS
OF 1-1.5" PER HR WITH ISOLATED RATES TO 2.0"/HR, ESPECIALLY IF THERE
ARE ANY OVERSHOOTING CLOUD TOPS LIKE 1745Z AND 1830Z.
.
AN ANNOTATED SATELLITE GRAPHIC SHOWING THE HEAVY PRECIPITATION THREAT AREA
SHOULD BE AVAILABLE ON THE INTERNET ADDRESS LISTED BELOW IN APPROXIMATELY
10-15 MINUTES.
.
SHORT TERM OUTLOOK VALID 1900-2200Z...MEDIUM CONFIDENCE FACTOR IN SHORT
TERM OUTLOOK...CONVECTIVE DEVELOP TO SW OF THIS SMALL COMPEX THE KEY...IF
CELLS CONTINUE TO DEVELOP...THEN THERE IS A CHANCE THEY COULD FEED
INTO BACK PART OF COMPEX AND CONTINUE TO GIVE BURSTS OF HVY RAIN AND
INCREASE FF. BUT NO WHERE NEAR A CERTAINTY...JUST WILL HAVE TO WATCH
THE CELL DEVELOPMENT AND POTENTIAL TRAINING IN MATAGORDA/WHARTON AND
EAST THAT COULD GIVE ADDITIONAL HVY RAIN TO BRAZORIA AND GALVESTON COUNTY.

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HGX issues Severe Thunderstorm Warning for Galveston County

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HGX issues Severe Thunderstorm Warning for Brazoria & Matagorda Counties

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Folks in Lake Jackson heads up. Hail reported and a rotating wall cloud obsevered near Richwood

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SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE HOUSTON/GALVESTON TX
306 PM CDT WED APR 4 2012

TXC039-321-042030-
/O.CON.KHGX.SV.W.0063.000000T0000Z-120404T2030Z/
BRAZORIA TX-MATAGORDA TX-
306 PM CDT WED APR 4 2012

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 330 PM
CDT FOR BRAZORIA AND EXTREME EAST CENTRAL MATAGORDA COUNTIES...

AT 257 PM CDT...DOPPLER RADAR INDICATED A SEVERE THUNDERSTORM
CAPABLE OF PRODUCING LARGE HAIL UP TO PING PONG BALL SIZE. THIS
STORM WAS LOCATED NEAR RICHWOOD...MOVING EAST AT 15 MPH. ANOTHER
SEVERE THUNDERSTORM WAS LOCATED NEAR SWEENY.

QUARTER SIZED HAIL WAS REPORTED IN LAKE JACKSON AT 255 PM CDT.

LOCATIONS IMPACTED INCLUDE...
LAKE JACKSON...ANGLETON...FREEPORT...CLUTE...WEST COLUMBIA...
SWEENY...RICHWOOD...BRAZORIA...WILD PEACH VILLAGE...JONES CREEK...
DANBURY...VAN VLECK...OYSTER CREEK...BAILEY`S PRAIRIE...SURFSIDE
BEACH AND QUINTANA.

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DAY 1 CONVECTIVE OUTLOOK
NWS STORM PREDICTION CENTER NORMAN OK
0300 PM CDT WED APR 04 2012

VALID 042000Z - 051200Z

...THERE IS A SLGT RISK OF SVR TSTMS FROM THE TX COASTAL AREA INTO
EXTREME ERN TX AND THE LOWER MS VALLEY REGION...

...THERE IS A SLGT RISK OF SVR TSTMS FROM THE SRN APPALACHIANS INTO
NC AND SRN VA...

...SRN THROUGH ERN TX...

A FEW STORMS CONTINUE ALONG SEA BREEZE AUGMENTED FRONT ALONG THE TX
COASTAL AREAS. TENDENCY HAS BEEN FOR THIS ACTIVITY TO DEVELOP SWD
WITH TIME...AND AT LEAST ISOLATED DEVELOPMENT REMAINS POSSIBLE INTO
SRN TX. STEEP LAPSE RATES...2000-3000 J/KG MLCAPE...AND 30-40 KT
EFFECTIVE SHEAR WILL SUPPORT A THREAT OF SUPERCELLS WITH LARGE HAIL
AND ISOLATED DAMAGING WIND THE MAIN THREATS INTO THE EARLY EVENING.

THE POTENTIAL EXISTS FOR OTHER STORMS TO DEVELOP FARTHER NORTH FROM
FAR ERN OR NERN TX INTO THE LOWER MS VALLEY REGION THIS EVENING AS
NEXT IN A SERIES OF VORT LOBES ROTATE THROUGH BASE OF UPPER TROUGH
AND BEGINS TO INTERACTS WITH WRN EDGE OF THE INSTABILITY AXIS.
SHOULD THEY DEVELOP...THESE STORMS WILL POSE A RISK FOR ISOLATED
DAMAGING WIND AND HAIL.

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HGX issues Severe Thunderstorm Warning for Jackson & Matagorda Counties

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MESOSCALE DISCUSSION 0447
NWS STORM PREDICTION CENTER NORMAN OK
0332 PM CDT WED APR 04 2012

AREAS AFFECTED...MIDDLE AND SRN TX COAST

CONCERNING...SEVERE THUNDERSTORM WATCH 139...

VALID 042032Z - 042200Z

THE SEVERE WEATHER THREAT FOR SEVERE THUNDERSTORM WATCH 139
CONTINUES.

SEVERE THREAT CONTINUES INVOF THE TX COAST/WITHIN WW 139.

LATEST RADAR IMAGERY SHOWS STORMS CONTINUING INVOF A SEA-BREEZE
BOUNDARY LOCATED JUST INLAND FROM THE TX COAST. SEVERAL STORMS HAVE
BEEN SUPERCELLULAR OVER THE PAST 1-2 HOURS -- PARTICULARLY ACROSS
NRN-MOST PORTIONS OF THE AREA...WHERE SLIGHTLY STRONGER FLOW ALOFT
IS INDICATED.

GIVEN THE VERY MOIST/UNSTABLE ENVIRONMENT AND SHEAR SUFFICIENT FOR
SUPERCELLS...EXPECT THREAT FOR HAIL AND LOCALLY DAMAGING WINDS TO
CONTINUE. IN ADDITION...WITH FAIRLY SLOW STORM MOVEMENT AND
CONVECTIVE CELLS MOVING REPEATEDLY OVER SOME OF THE SAME
AREAS...LOCALLY HEAVY RAINFALL WILL ALSO OCCUR.

..GOSS.. 04/04/2012


ATTN...WFO...HGX...CRP...BRO...