Alert archive / Texas / Severe Thunderstorm Warnings in 2002

Severe Thunderstorm Warning 21, NWS Houston/Galveston, TX

March 30, 2002Chambers County, Liberty County, Texas

NWS Houston/Galveston, TX issued this severe thunderstorm warning at Mar 30, 2002, 8:32 PM CST for Chambers County, Liberty County, Texas. It was in force for 43 min. No storm report in the archive falls inside the area while it was in force.

The area

The outline as issued.

The facts

Issued: Mar 30, 2002, 8:32 PM CST (02:32 UTC)
Expired: Mar 30, 2002, 9:15 PM CST
In force: 43 min
Issued by: NWS Houston/Galveston, TX
Area: Counties, with a storm outline in the text

Counties Chambers County, TX, Liberty County, TX

The watch it was issued in

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

Issued	Product	Office	Lasted
Mar 30, 5:30 PM CST	Tornado Watch	SPC	6 hr

The nearest sounding before it

Lake Charles Mun, LA (KLCH), launched 00:00Z, 2.5 hours before the alert went out and 159 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-p

Temperature in red, dew point in green, the mixed-layer parcel dashed.

Hodograph

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: 2027 J/kg
Mixed-layer CIN: -16 J/kg
Mixed-layer LCL: 712 m above ground
0-6 km bulk shear: 58 kt
0-1 km storm-relative helicity: 97 m²/s²
0-3 km storm-relative helicity: 121 m²/s²
Significant tornado parameter: 1.5
Supercell composite: 6.2

Open this sounding in Storm Lab

The text

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

691 
WUUS54 KHGX 310232
SVRHOU
TXC071-291-310315-

BULLETIN - EAS ACTIVATION REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE HOUSTON/GALVESTON TX
831 PM CST SAT MAR 30 2002

THE NATIONAL WEATHER SERVICE HAS ISSUED A

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

* UNTIL 915 PM CST

* AT 829 PM CST...DOPPLER RADAR INDICATED A LINE OF SEVERE           
  THUNDERSTORMS FROM 3 MILES SOUTH OF BEACH CITY TO THE              
  LIBERTY/DAYTON AREA...MOVING NORTHEAST AT 30 MPH.

* LOCATIONS IN THE PATH OF THE SEVERE THUNDERSTORM INCLUDE...
  BEACH CITY...MONT BELVIEU
  OAK ISLAND...COVE
  DAYTON
  ANAHUAC...WALLISVILLE...KENEFICK
  LIBERTY...DAYTON LAKES

LARGE HAIL AND WIND GUSTS OVER 60 MPH ARE LIKELY WITH THESE STORMS.

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 2968 9491 2957 9498 2973 9440 3009 9448
          3017 9499 2980 9491 2973 9493

The office that day

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

Issued	Product	Office	Counties	Lasted
Mar 30, 6:04 PM CST	Tornado Warning	HGX	Matagorda, Wharton	41 min
Mar 30, 6:22 PM CST	Severe Thunderstorm Warning	HGX	Polk, Trinity	38 min
Mar 30, 6:31 PM CST	Severe Thunderstorm Warning	HGX	Harris	59 min
Mar 30, 6:33 PM CST	Tornado Warning	HGX	Polk	27 min
Mar 30, 6:48 PM CST	Tornado Warning	HGX	Brazoria, Fort Bend, Matagorda	57 min
Mar 30, 7:01 PM CST	Tornado Warning	HGX	Polk, Trinity	29 min
Mar 30, 7:23 PM CST	Severe Thunderstorm Warning	HGX	Harris, Liberty	37 min
Mar 30, 7:39 PM CST	Severe Thunderstorm Warning	HGX	Polk, San Jacinto	36 min
Mar 30, 7:47 PM CST	Tornado Warning	HGX	Chambers, Galveston, Harris	43 min
Mar 30, 7:54 PM CST	Special Marine Warning	HGX		66 min
Mar 30, 8:01 PM CST	Tornado Warning	HGX	Liberty	29 min
Mar 30, 9:08 PM CST	Special Marine Warning	HGX		67 min
Mar 30, 10:17 PM CST	Special Marine Warning	HGX		58 min
Mar 31, 3:02 AM CST	Severe Thunderstorm Warning	HGX	Trinity	13 min

Nearby

Severe Thunderstorm Warnings in Texas, 2002 Every 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; the sounding from the Mesonet's radiosonde archive.