Alert archive / Texas / Severe Thunderstorm Warnings in 2001

Severe Thunderstorm Warning 91, NWS Houston/Galveston, TX

June 8, 2001Chambers County, Texas

NWS Houston/Galveston, TX issued this severe thunderstorm warning at Jun 8, 2001, 1:37 AM CDT for Chambers County, Texas. It was in force for 38 min. No storm report in the archive falls inside the area while it was in force.

The area

The outline the Iowa Environmental Mesonet reconstructed for it; the warning itself named whole counties.

The facts

Issued
Jun 8, 2001, 1:37 AM CDT (06:37 UTC)
Expired
Jun 8, 2001, 2:15 AM CDT
In force
38 min
Issued by
NWS Houston/Galveston, TX
Area
Whole counties; the outline is the Mesonet’s reconstruction

County Chambers County, TX

The radar

The Houston radar (KHGX), 70 km from the middle of the area, began a volume at 06:36 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.

The nearest sounding before it

Lake Charles Mun, LA (KLCH), launched 00:00Z, 6.6 hours before the alert went out and 126 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 2001-06-08Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 1189 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 2001-06-08The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 45 square meters per square second.193958Sfc1 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
1189 J/kg
Mixed-layer CIN
-22 J/kg
Mixed-layer LCL
887 m above ground
0-6 km bulk shear
28 kt
0-1 km storm-relative helicity
45 m²/s²
0-3 km storm-relative helicity
87 m²/s²
Significant tornado parameter
0.2
Supercell composite
1.6

Open this sounding in Storm Lab

The text

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

000 
WUUS54 KHGX 080638
SVRHOU

TXC071-080715-

BULLETIN - EAS ACTIVATION REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE HOUSTON/GALVESTON TX
137 AM CDT FRI JUN 8 2001

THE NATIONAL WEATHER SERVICE HAS ISSUED A

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

* UNTIL 215 AM CDT

* AT 126 AM CDT...DOPPLER RADAR INDICATED A SEVERE THUNDERSTORM 12
  MILES SOUTHWEST OF STOWELL...MOVING NORTHEAST AT 15 MPH.

* LOCATIONS IN THE PATH OF THE SEVERE THUNDERSTORM INCLUDE...
  STOWELL
  WINNIE

WINDS IN EXCESS OF 60 MPH ARE 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 2990 9440 2989 9441 2989 9450 2970 9450
          2957 9449 2957 9443 2959 9443 2961 9440
          2961 9436 2983 9436 2990 9438

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 Jun 7, 8:15 PM CDT, 5 hours 22 minutes earlier.

Area forecast discussion, Jun 7, 8:15 PM CDT, 5 hours 22 minutes before
SOUTHEAST TEXAS FORECAST DISCUSSION...REMOVED CAUTION FOR BAYS
NATIONAL WEATHER SERVICE HOUSTON/GALVESTON TX
815 PM CDT THU JUN 7 2001

ONLY MINOR CHANGES IN 9 PM UPDATE...

THE PERSISTENT MID LEVEL REMAINS OF T.D. ALLISON WILL CONTINUE  TO
BE THE MAIN PLAYER IN THE LOCAL FORECAST AREA INTO THE WEEKEND.
MOST RECENT CONSENSUS BASED MAINLY ON RADAR, SATELLITE & RUC - IS
THAT THE 700 MB CIRCULATION IS BEGINNING TO BECOME DISTENDED WITH A
NE-SW AXIS.  IF THIS IS SO, AND THE LATEST RUC AND ETA FORECASTS PAN
OUT, THIS MAY RESULT IN REDEVELOPMENT OR INTENSIFICATION OF
PRECIPITATION ON THE SOUTHEAST SIDE OF THIS 700MB CYCLONE AXIS,
MEANING (FOR TONIGHT) MAINLY IN A CORRIDOR FROM THE MATAGORDA BAY
AREA TO SOUTHERN LIBERTY COUNTY, INCLUDING METRO HOUSTON.  AND AS
HAS BEEN WELL COVERED IN THE NEWS, MUCH OF THE HOUSTON AREA HAS BEEN
THOROUGHLY DRENCHED DURING THE LAST TWO DAYS ALREADY.

HOWEVER, THIS DOESNT CALL FOR MUCH IF ANY CHANGE TO CURRENT
FORECAST, SINCE ENTIRE CWA IS UNDER A FLASH FLOOD WATCH - IT JUST
MEANS WE MAY GET INTO A FLASH FLOOD WARNING SITUATION A LITTLE
EARLIER THAN ANTICIPATED, POSSIBLY BETWEEN 9 PM & MIDNIGHT.

AND AS FAR AS THE FLASH FLOOD WATCH GOES, SINCE LARGE AREAS OF LIGHT
TO MODERATE CONTINUE TO ORBIT ABOUT THE 700MB CIRCULATION,
IMPOSSIBLE TO RULE OUT ANY AREA IN THE CWA AS NOT AT RISK, ALTHOUGH
THE STRIP OF COUNTIES ON THE FAR WESTERN EDGE OF THE FORECAST AREA
HAVE YET TO REALLY RECEIVE COPIOUS RAINS FROM THIS SYSTEM.  HOWEVER,
THE CURRENT TREND OF THE MID LEVEL CIRCULATION TO SLIP GRADUALLY TO
THE SOUTHWEST MAY BRING THEM INTO THE ACT YET.

ELSE, NOT MUCH CHANGED IN THE 18Z RUNS REGARDING THE
QUASI-STATIONARY NATURE OF THE REMAINS OF THE T.D. AND IN PARTICULAR
THE MID & UPPER LEVEL CIRCULATIONS, WHICH MAY PRESENT A PRECIP
PROBLEM INTO NEXT WEEK.

38/36/30/48

.KHGX...FLASH FLOOD WATCH ALL OF SOUTHEAST TEXAS THROUGH
        TONIGHT.
        SCEC 0-60 NM WATERS.

PRELIMS...
CLL TT 072/082 072/082 072 877
IAH TT 073/082 073/082 072 877
GLS TT 075/084 075/084 075 877

The office that day

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

IssuedProductOfficeCountiesLasted
Jun 7, 8:02 PM CDTFlash Flood WarningHGXLiberty3 hr
Jun 7, 8:45 PM CDTFlash Flood WarningHGXHouston3 hr
Jun 7, 10:44 PM CDTFlash Flood WarningHGXWalker3 hr
Jun 7, 11:21 PM CDTFlash Flood WarningHGXHouston3 hr
Jun 7, 11:48 PM CDTFlash Flood WarningHGXLiberty3 hr
Jun 8, 1:49 AM CDTFlash Flood WarningHGXLiberty4 hr
Jun 8, 2:50 AM CDTFlash Flood WarningHGXHouston, Trinity, Walker6 hr
Jun 8, 3:57 AM CDTSevere Thunderstorm WarningHGXGalveston, Harris63 min
Jun 8, 4:25 AM CDTFlash Flood WarningHGXBrazoria, Chambers, Galveston, Liberty3 hr
Jun 8, 6:41 AM CDTFlash Flood WarningHGXPolk2 hr
Jun 8, 7:15 AM CDTFlash Flood WarningHGXBrazoria3 hr
Jun 8, 7:23 AM CDTFlash Flood WarningHGXLiberty3 hr
Jun 8, 3:48 PM CDTFlash Flood WarningHGXMontgomery, Walker3 hr
Jun 8, 5:10 PM CDTFlash Flood WarningHGXHarris3 hr
Jun 8, 5:30 PM CDTFlash Flood WarningHGXBrazoria, Fort Bend3 hr
Jun 8, 5:46 PM CDTTornado WarningHGXMontgomery44 min
Jun 8, 6:40 PM CDTFlash Flood WarningHGXWashington3 hr
Jun 8, 6:52 PM CDTFlash Flood WarningHGXMontgomery, Walker3 hr

Nearby

Severe Thunderstorm Warnings in Texas, 2001Every severe thunderstorm warning in 2001

Sources

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