Alert archive / Texas / Severe Thunderstorm Warnings in 2002

Severe Thunderstorm Warning 8, NWS Houston/Galveston, TX

March 25, 2002Polk County, Texas

NWS Houston/Galveston, TX issued this severe thunderstorm warning at Mar 25, 2002, 8:16 PM CST for Polk County, Texas. It was in force for 44 min. 1 report came from inside the area while it was in force.

The area

The outline as issued, with what was reported inside it.

The facts

Issued
Mar 25, 2002, 8:16 PM CST (02:16 UTC)
Expired
Mar 25, 2002, 9:00 PM CST
In force
44 min
Issued by
NWS Houston/Galveston, TX
Area
Counties, with a storm outline in the text

County Polk County, TX

The radar

The Houston radar (KHGX), 163 km from the middle of the area, began a volume at 02:16 UTC, the scan nearest the moment this went out.

Open the radar archive at this moment

The archived warnings, watches and discussions in force at that minute are drawn over the scan, this one among them.

What was reported inside it

TimeReportWhereRemark
Mar 25, 8:18 PM CSTHail 1.5Corrigan, TXQuarter to half dollar sized Hail (1.00" to 1.50") was reported by Co-op Observer.

NCEI Storm Data entries that began inside the alert's area while it was in force. Before 2003 the local storm report archive is thin, so this is the record of what happened rather than what was phoned in.

Did it verify

Not verified. The Iowa Environmental Mesonet's Cow found no qualifying storm report inside this severe thunderstorm warning while it was in force. That is not proof nothing happened: reports are thin where few people live.

Cow counts a report within 15 km of the polygon while the warning was in force: a tornado for a tornado warning; hail of 1 inch or more, a gust of 58 mph or more or wind damage for a severe thunderstorm warning; a flash flood report for a flash flood warning.

The watch it was issued in

The SPC watch in force over the same counties when this warning went out.

IssuedProductOfficeLasted
Mar 25, 7:30 PM CSTSevere Thunderstorm WatchSPC6 hr

The nearest sounding before it

Lake Charles Mun, LA (KLCH), launched 00:00Z, 2.3 hours before the alert went out and 188 km from the middle of its area. This is the routine balloon launch nearest before it, the air the forecaster had in hand, not a measurement taken for the alert.

Skew-T log-pSkew-T log-p diagram, Lake Charles Mun, LA at 00:00Z on 2002-03-26Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 819 joules per kilogram.LCLLFCEL10008507005003002001001 km2 km3 km6 km9 km12 km15 km-30°-20°-10°0°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Lake Charles Mun, LA at 00:00Z on 2002-03-26The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 77 square meters per square second.1939587897117Sfc1 km3 km6 km9 kmRMLM
The wind turning with height, colored by layer: ground to 1 km, 1 to 3 km, 3 to 6 km, 6 to 10 km.
Mixed-layer CAPE
819 J/kg
Mixed-layer CIN
-18 J/kg
Mixed-layer LCL
932 m above ground
0-6 km bulk shear
36 kt
0-1 km storm-relative helicity
77 m²/s²
0-3 km storm-relative helicity
117 m²/s²
Significant tornado parameter
0.4
Supercell composite
5.1

Open this sounding in Storm Lab

The text

As transmitted, in the capitals the NWS used until 2016.

000 
WUUS54 KHGX 260216
SVRHOU
TXC373-260300-

BULLETIN - EAS ACTIVATION REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE HOUSTON/GALVESTON TX
816 PM CST MON MAR 25 2002

THE NATIONAL WEATHER SERVICE HAS ISSUED A

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

* UNTIL 900 PM CST

* AT 806 PM CST...DOPPLER RADAR INDICATED A SEVERE THUNDERSTORM 7    
  MILES NORTHEAST OF ONALASKA...MOVING NORTHEAST AT 25 MPH. QUARTER
  SIZED HAIL HAS BEEN REPORTED NEAR ONALASKA.

* LOCATIONS IN THE PATH OF THE SEVERE THUNDERSTORM INCLUDE...
  SEVEN OAKS
  CORRIGAN

QUARTER SIZED HAIL IS LIKELY WITH THIS STORM.

MOVE TO AN INTERIOR ROOM ON THE LOWEST FLOOR OF YOUR HOME OR
BUSINESS. STAY AWAY FROM WINDOWS

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 3083 9514 3068 9501 3108 9455 3125 9476

What forecasters said that day

The local office's own words before this severe thunderstorm warning went out, as it sent them, from the Iowa Environmental Mesonet's archive of National Weather Service text.

NWS Houston/Galveston, TX wrote its last area forecast discussion before this severe thunderstorm warning went out at Mar 25, 6:05 PM CST, 2 hours 11 minutes earlier.

Area forecast discussion, Mar 25, 6:05 PM CST, 2 hours 11 minutes before
SOUTHEAST TEXAS FORECAST DISCUSSION...UPDATED
NATIONAL WEATHER SERVICE HOUSTON/GALVESTON TX
605 PM CST MON MAR 25 2002

COLD FRONT EXTENDS FROM LUFKIN TO HOUSTON TO PALACIOS AT 545 PM. SPC
HAS ISSUED AN MCD FOR ERN ZONES FOR POSSIBILITY OF A FEW SEVERE
STORMS. LAPS ANALYSIS SHOWS WEAK WAVE OF LOW PRESSURE ALONG FRONT
JUST NORTH OF HOUSTON WITH LIS OF -4 TO -6 AND CAPES OF 1500 AHEAD
OF FRONT. WILL UPDATE ZFP TO INCREASE POPS FOR SERN PART OF CWA AND
ADD MENTION OF THUNDER. FRONT SHOULD MOVE OUT OF CWA BETWEEN 03 AND
04Z WITH THREAT OF CONVECTION ENDING AT THAT POINT.

35/30

PREVIOUS DISCUSSION...
WHILE THE FRONT HAS SLOWED SOME THIS AFTERNOON...IT IS STILL ON A
CLIP TO HIT THE COASTAL ZONES AT/AROUND SUNSET. TEMPERATURE DROPS
WITH FROPA HAVE BEEN IMPRESSIVE - RANGING FROM 15 TO 20 DEGREES F.
THE WAVE THAT DEVELOPED ALONG THE FRONT APPEARS TO BE PUSHING THE
SRN END OF THE BOUNDARY MORE THAN THE NRN HALF. OUT AHEAD OF (AND
TO SOME EXTENT BEHIND) THE COLD FRONT...SHOWERS CAN BE FOUND (BUT
NO LIGHTNING DETECTED SO FAR). WILL GO AHEAD AND KEEP CHANCE POPS
FOR THE CENTRAL/COASTAL LOCALES FOR THE EARLY PART OF THE EVENING.
THE MAIN PROBLEM FOR THIS PACKAGE APPEARS TO BE TIMING. THAT IS...
WHEN THE EXTENSIVE CLOUD DECK WILL BEGIN TO CLEAR OUT AND WHEN WE
WILL SEE THE NEXT WX SYSTEM (IN THE EXTENDED). AS FOR THE CURRENT
OVC DECK...SOME CLEARING IS POSSIBLE OVERNIGHT BUT EXPECT MOST OF
THE CLEARING TO OCCUR EARLY TOMORROW AS THE UPPER RIDGE BECOMES A
LITTLE  BETTER ESTABLISHED. BUT HAVING SAID THAT THIS RIDGE NEVER
SEEMS TO SETTLE IN PROPERLY DURING THE WEEK (PER THE LATEST PROGS)
AND APPEARS TO REMAIN A BIT ON THE FLAT SIDE. AND WITH THE SLOWER
CLEARING TREND...TOMORROW NIGHT LOOKS TO BE A TAD COLDER THAN TO-
NIGHT. AT THE SFC...AS HIGH PRESSURE MOVES OFF TO THE EAST THURS-
DAY WE SHOULD SEE A RETURN OF ONSHORE WINDS AT THAT TIME. FOR THE
EXTENDED (IF THE LONG RANGE PROGS ARE ANY WHERE NEAR CORRECT) THE
UPCOMING HOLIDAY WEEKEND LOOKS QUITE WET. 41/45/37

.HGX...SCA BAYS AND COASTAL WATERS 0-60 NM TONIGHT AND TOMORROW.

PRELIMS...
CLL EB 045/066 042/070 048 100
IAH EB 048/067 044/072 049 700
GLS EB 055/065 051/068 056 700

In the hours before

Special weather statement, Mar 25, 8:05 PM CST, 11 minutes before
TXZ164-178-179-199-200-213-214-237-238-260700-

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE HOUSTON/GALVESTON TX
805 PM CST MON MAR 25 2002

...SEVERE THUNDERSTORM WATCH FOR PARTS OF SOUTHEAST TEXAS UNTIL 1
AM...

THE STORM PREDICTION CENTER HAS ISSUED A SEVERE THUNDERSTORM WATCH
FOR THE EASTERN PARTS OF SOUTHEAST TEXAS UNTIL 1 AM. THE WATCH IS
IN EFFECT EAST OF A LINE FROM TRINITY TO HOUSTON TO LAKE JACKSON.

THE FOLLOWING COUNTIES ARE IN THE WATCH...TRINITY...POLK...SAN
JACINTO...MONTGOMERY...HARRIS...BRAZORIA...GALVESTON...LIBERTY...AND
CHAMBERS.

SOME COMMUNITIES INCLUDED IN THE WATCH ARE GROVETON...CORRIGAN...
LIVINGSTON...COLDSPRING...CONROE...HOUSTON...LIBERTY...ANAHUAC...
GALVESTON...AND LAKE JACKSON.

A COLD FRONT IS PUSHING EAST ACROSS SOUTHEAST TEXAS. SCATTERED
THUNDERSTORMS ARE DEVELOPING ALONG AND BEHIND THE FRONT. SOME OF
THESE STORMS MAY BECOME SEVERE AS THE EVENING PROGRESSES. THE THREAT
FOR SEVERE WEATHER WILL END LATER THIS EVENING.

A SEVERE THUNDERSTORM WATCH MEANS CONDITIONS ARE FAVORABLE FOR
THUNDERSTORMS TO PRODUCE DAMAGING WIND GUSTS AND LARGE HAIL. A
SEVERE THUNDERSTORM WARNING IS ISSUED WHEN SEVERE WEATHER IS IMMINENT
OR OCCURRING.

STAY TUNED TO NOAA WEATHER RADIO AND LOCAL MEDIA FOR ADDITIONAL
UPDATES AND POSSIBLE WARNINGS. IF YOU ARE IN THE PATH OF A SEVERE
THUNDERSTORM...MOVE INSIDE TO A REINFORCED STRUCTURE AND STAY AWAY
FROM WINDOWS.

The office that day

Everything else NWS Houston/Galveston, TX issued on the same UTC day.

IssuedProductOfficeCountiesLasted
Mar 25, 7:27 PM CSTSevere Thunderstorm WarningHGXTrinity48 min
Mar 25, 10:39 PM CSTSevere Thunderstorm WarningHGXLiberty, Montgomery51 min
Mar 26, 12:13 AM CSTSevere Thunderstorm WarningHGXHarris, Liberty62 min

Nearby

Severe Thunderstorm Warnings in Texas, 2002Every severe thunderstorm warning in 2002

Sources

The product and its follow-ups from the Iowa Environmental Mesonet's archive of National Weather Service and Storm Prediction Center text; verification from NCEI's Storm Data; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.