Alert archive / Texas / Severe Thunderstorm Warnings in 1998
Severe Thunderstorm Warning 87, NWS Houston/Galveston, TX
NWS Houston/Galveston, TX issued this severe thunderstorm warning at Mar 7, 1998, 4:42 AM CST for Chambers County, Texas. It was in force for 48 min. No storm report in the archive falls inside the area while it was in force.
The area
The counties it named.
The facts
- Issued
- Mar 7, 1998, 4:42 AM CST (10:42 UTC)
- Expired
- Mar 7, 1998, 5:30 AM CST
- In force
- 48 min
- Issued by
- NWS Houston/Galveston, TX
- Area
- Whole counties
County Chambers County, TX
The radar
The Houston radar (KHGX), 47 km from the middle of the area, began a volume at 10:50 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, 10.7 hours before the alert went out and 149 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.
- Mixed-layer CAPE
- 904 J/kg
- Mixed-layer CIN
- -3 J/kg
- Mixed-layer LCL
- 617 m above ground
- 0-6 km bulk shear
- 50 kt
- 0-1 km storm-relative helicity
- 65 m²/s²
- 0-3 km storm-relative helicity
- 159 m²/s²
- Significant tornado parameter
- 0.4
- Supercell composite
- 2.1
The text
The text of this product is not in the archive. The NWS text archive before 2002 is incomplete.
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 7, 3:18 AM CST, 1 hour 24 minutes earlier.
Area forecast discussion, Mar 7, 3:18 AM CST, 1 hour 24 minutes before
SOUTHEAST TEXAS FORECAST DISCUSSION NATIONAL WEATHER SERVICE HOUSTON/GALVESTON TX 318 AM CST SAT MAR 7 1998 STRONG CLUSTER OF STORMS HAVE MOVED OUT OF THE WATERS SE OF HIGH ISLAND AND INTO LA WITH MDT MESOS INDICATIVE OF THE ENVIORN. WARM FRONT APPEARS TO RUN FROM NEAR LCH TO GLS TO JUST OFFSHORE OF PSX AND THEN COMES ONSHORE BETWEEN CRP/BRO. RIDGING BEHIND THE FRONT HAS WEAKENED CONSIDERABLY SINCE 03Z. WIDESPREAD FOG WILL CONTINUE UNTIL WARM FRONTAL PASSAGE...SEA FOG WILL BE A PROBLEM ALONG THE IMMEDIATE COAST THIS MORNING. WARM FRONT SHOULD BEGIN THE MARCH INLAND BEFORE 12Z MAKING SETX MORE VULNERABLE TO THE MUCH ADVERTISED SVR THREAT. MDT RISK GLS-IAH AND NORTHEASTWARD-SLIGHT ELSEWHERE PER SPC. S/W OVER THE MEX MOUNTAINS LOOKS AS THOUGH IT WILL BE MOVING INTO THE REGION BETWEEN 15-21Z SPARKING WIDESPREAD TSRA. PW 1-1.4...LI <-2...CAPES IN THE 1200-1800 RANGE...STRONG SFC-700 SHEAR AND FAVORABLE ENVIORN FOR SUPERCELLS. ISOLATED TORNADOES A SIGNIFICANT THREAT TODAY MIXED WITH HAIL AND DAMAGING WINDS. THREAT SHOULD CHANGE OVER TONIGHT TO MORE OF HAIL AS MID LEVEL COOLING SETS IN. CONVECTION ALONG THIS PREFRONTAL TROUGH MAY LEAVE BEHIND AN INTERSECTING BOUNDARY FOR CONVECTION TO WORK ON WITH THE COLD FRONT THAT WILL COME THROUGH TONIGHT. GIVEN HOW STRONG THE SYSTEM IS...RESIDUAL MOISTURE AND THE PACE OF THE FRONT WILL NEED TO INCLUDE MENTION OF SOME SEVERE FOR TODAY THROUGH TONIGHT...LIMITING FACTOR ON CONVECTION TONIGHT WILL BE THE MAGNITUDE OF THE CAP. WRAP AROUND MOISTURE WILL BE PREVELANT SUNDAY SO WILL KEEP CLOUDS IN THE FCST BUT NO SIG POPS FOR SUNDAY. BREEZY CONDITIONS 15 TO 20 MPH AND GUSTY INLAND ON SUNDAY...WINDY ON THE COAST 20 TO 25 MPH AND GUSTY. GUSTS TO GALE LOOK QUITE REASONABLE ON NOSE OF 45-50 KNOT 850 JET IMPINGING ON COASTAL WATERS SUNDAY. TEMPS WILL BE TAKING A SERIOUS PLUNGE. WILL FAVOR THE FAN FOR TEMPS. 45 PRELIMS... CLL TC/ C/C/E 066/045/057/037 7300 IAH TC/T>E/C/E 071/051/062/039 7400 GLS TE/T>E/E/E 069/056/062/044 7510
In the hours before
Special weather statement, Mar 6, 11:57 PM CST, 4 hours 45 minutes before
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</html>The office that day
Everything else NWS Houston/Galveston, TX issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Mar 7, 7:17 AM CST | Severe Thunderstorm Warning | HGX | Polk | 33 min |
| Mar 7, 8:02 AM CST | Tornado Warning | HGX | Polk | 33 min |
| Mar 7, 8:19 AM CST | Severe Thunderstorm Warning | HGX | Trinity | 61 min |
Nearby
Severe Thunderstorm Warnings in Texas, 1998Every severe thunderstorm warning in 1998
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.