Alert archive / Texas / Severe Thunderstorm Warnings in 1998
Severe Thunderstorm Warning 30, NWS Houston/Galveston, TX
NWS Houston/Galveston, TX issued this severe thunderstorm warning at Jan 21, 1998, 9:40 PM CST for Chambers County, Texas. It was in force for 35 min. 1 report came from inside the area while it was in force.
The area
The counties it named, with what was reported inside it.
The facts
- Issued
- Jan 21, 1998, 9:40 PM CST (03:40 UTC)
- Expired
- Jan 21, 1998, 10:15 PM CST
- In force
- 35 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 03:40 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
| Time | Report | Where | Remark |
|---|---|---|---|
| Jan 21, 9:44 PM CST | Hail 0.75 | Winnie, TX |
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.
The watch it was issued in
The SPC watch in force over the same counties when this warning went out.
| Issued | Product | Office | Lasted |
|---|---|---|---|
| Jan 21, 8:00 PM CST | Severe Thunderstorm Watch | SPC | 6 hr |
The nearest sounding before it
Lake Charles Mun, LA (KLCH), launched 00:00Z, 3.7 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
- 1567 J/kg
- Mixed-layer CIN
- -9 J/kg
- Mixed-layer LCL
- 528 m above ground
- 0-6 km bulk shear
- 46 kt
- 0-1 km storm-relative helicity
- 120 m²/s²
- 0-3 km storm-relative helicity
- 168 m²/s²
- Significant tornado parameter
- 1.3
- Supercell composite
- 6.4
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 Jan 21, 7:55 PM CST, 1 hour 45 minutes earlier.
Area forecast discussion, Jan 21, 7:55 PM CST, 1 hour 45 minutes before
SOUTHEAST TEXAS FORECAST DISCUSSION NATIONAL WEATHER SERVICE HOUSTON/GALVESTON TX 755 PM CST WED JAN 21 1998 QUITE A HECTIC LATE AFTN-EVE W/OUTBREAK OF SUPERCELLS. 00Z LCH SOUNDING QUITE POTENT W/ABOUT 2000J/KG. SR HELICITY 144. CONVECTION SHOULD CONT ALL OF FA TONITE. RECOMMEND IST PD MINOR CHANGES AS FOLLOWS... CLL AREA...WND BCMG NORTHEAST. IAH AREA...WIND BECMG NORTHEAST LATE. GLS AREA...LOW UPPER 50S INLAND...NR 60 COAST. 37
In the hours before
Special weather statement, Jan 21, 8:12 PM CST, 1 hour 28 minutes before
TXZ178-179-199-200-213-214-226-227-235>238-220805- SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE HOUSTON/GALVESTON TX 812 PM CST WED JAN 21 1998 SEVERE THUNDERSTORM WATCH HAS BEEN ISSUED FOR MUCH OF SOUTHEAST TEXAS GENERALLY SOUTH AND EAST OF A LINE FROM EDNA TO WHARTON TO CONROE TO LIVINGSTON LINE. THIS THUNDERSTORM WATCH REPLACES THE TORNADO WATCH THAT EXPIRED AT 800 PM. THE FOLLOWING COUNTIES IN SOUTHEAST TEXAS ARE INCLUDED IN THE THUNDERSTORM WATCH...JACKSON...WHARTON...BRAZORIA...CHAMBERS...FORT BEND...GALVESTON...HARRIS...LIBERTY....MATAGORDA...MONTGOMERY... POLK...SAN JACINTO AND ADJACENT COASTAL WATERS. A WEAK COLD FRONT WILL MOVE SLOWLY SOUTHEAST INTO SOTUHEAST TEXAS TONIGHT. THIS FRONT WILL BE MOVING INTO A VERY WARM MOIST UNSTABLE AIRMASS. THIS COMBINATION WILL CONTINUE TO LEAD TO DEVELOPMENT OF ADDITIONAL THUNDERSTORMS TONIGHT SOME POSSIBLY SEVERE CONTAINING LARGE HAIL AND DAMAGING WINDS. IF YOU ARE OUTDOORS...MOVE TO A PLACE OF SHELTER IMMEDIATELY IF A STORM APPROACHES. MOTORISTS SHOULD REMAIN ALERT FOR REDUCED VISIBILITIES DURING DOWNPOURS OF RAIN. STREETS MAY FLOOD QUICKLY.
Special weather statement, Jan 21, 8:12 PM CST, 1 hour 28 minutes before
TXZ178-179-199-200-213-214-226-227-235>238-220805- SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE HOUSTON/GALVESTON TX 812 PM CST WED JAN 21 1998 SEVERE THUNDERSTORM WATCH HAS BEEN ISSUED FOR MUCH OF SOUTHEAST TEXAS GENERALLY SOUTH AND EAST OF A LINE FROM EDNA TO WHARTON TO CONROE TO LIVINGSTON LINE. THIS THUNDERSTORM WATCH REPLACES THE TORNADO WATCH THAT EXPIRED AT 800 PM. THE FOLLOWING COUNTIES IN SOUTHEAST TEXAS ARE INCLUDED IN THE THUNDERSTORM WATCH...JACKSON...WHARTON...BRAZORIA...CHAMBERS...FORT BEND...GALVESTON...HARRIS...LIBERTY....MATAGORDA...MONTGOMERY... POLK...SAN JACINTO AND ADJACENT COASTAL WATERS. A WEAK COLD FRONT WILL MOVE SLOWLY SOUTHEAST INTO SOTUHEAST TEXAS TONIGHT. THIS FRONT WILL BE MOVING INTO A VERY WARM MOIST UNSTABLE AIRMASS. THIS COMBINATION WILL CONTINUE TO LEAD TO DEVELOPMENT OF ADDITIONAL THUNDERSTORMS TONIGHT SOME POSSIBLY SEVERE CONTAINING LARGE HAIL AND DAMAGING WINDS. IF YOU ARE OUTDOORS...MOVE TO A PLACE OF SHELTER IMMEDIATELY IF A STORM APPROACHES. MOTORISTS SHOULD REMAIN ALERT FOR REDUCED VISIBILITIES DURING DOWNPOURS OF RAIN. STREETS MAY FLOOD QUICKLY.
The office that day
Everything else NWS Houston/Galveston, TX issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jan 21, 6:07 PM CST | Tornado Warning | HGX | Matagorda, Wharton | 68 min |
| Jan 21, 6:18 PM CST | Flash Flood Warning | HGX | Grimes, Walker | 2 hr |
| Jan 21, 6:21 PM CST | Tornado Warning | HGX | Grimes, Montgomery | 49 min |
| Jan 21, 6:29 PM CST | Tornado Warning | HGX | San Jacinto, Walker | 61 min |
| Jan 21, 6:33 PM CST | Flash Flood Warning | HGX | Fort Bend | 3 hr |
| Jan 21, 6:46 PM CST | Severe Thunderstorm Warning | HGX | Brazoria, Harris | 64 min |
| Jan 21, 6:58 PM CST | Severe Thunderstorm Warning | HGX | Polk | 62 min |
| Jan 21, 7:38 PM CST | Severe Thunderstorm Warning | HGX | Chambers | 62 min |
| Jan 21, 8:19 PM CST | Severe Thunderstorm Warning | HGX | Houston | 61 min |
| Jan 21, 8:25 PM CST | Severe Thunderstorm Warning | HGX | Brazoria | 65 min |
| Jan 21, 8:35 PM CST | Severe Thunderstorm Warning | HGX | Chambers, Liberty | 65 min |
| Jan 21, 8:48 PM CST | Severe Thunderstorm Warning | HGX | Galveston, Harris | 62 min |
| Jan 21, 9:34 PM CST | Flash Flood Warning | HGX | Chambers | 3 hr |
| Jan 21, 9:51 PM CST | Flash Flood Warning | HGX | Harris | 3 hr |
| Jan 21, 10:27 PM CST | Severe Thunderstorm Warning | HGX | Harris | 33 min |
| Jan 21, 10:36 PM CST | Flash Flood Warning | HGX | Chambers | 64 min |
| Jan 21, 10:36 PM CST | Severe Thunderstorm Warning | HGX | Chambers | 64 min |
| Jan 21, 10:53 PM CST | Severe Thunderstorm Warning | HGX | Chambers | 67 min |
| Jan 22, 12:33 AM CST | Flash Flood Warning | HGX | Chambers, Harris | 4 hr |
| Jan 22, 4:27 AM CST | Flash Flood Warning | HGX | Chambers | 3 hr |
| Jan 22, 9:05 AM CST | Severe Thunderstorm Warning | HGX | Jackson | 55 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; verification from NCEI's Storm Data; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.