Alert archive / Texas / Severe Thunderstorm Warnings in 1998
Severe Thunderstorm Warning 21, NWS Houston/Galveston, TX
NWS Houston/Galveston, TX issued this severe thunderstorm warning at Jan 21, 1998, 5:52 PM CST for Grimes County, Texas. It was in force for 48 min. 2 reports 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, 5:52 PM CST (23:52 UTC)
- Expired
- Jan 21, 1998, 6:40 PM CST
- In force
- 48 min
- Issued by
- NWS Houston/Galveston, TX
- Area
- Whole counties
County Grimes County, TX
The radar
The Ft Hood radar (KGRK), 135 km from the middle of the area, began a volume at 23:53 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, 6:00 PM CST | Hail 1.75 | Roans Prairie, TX | |
| Jan 21, 6:30 PM CST | Hail 1 | Richards, 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, 2:15 PM CST | Tornado Watch | SPC | 6 hr |
The nearest sounding before it
Lake Charles Mun, LA (KLCH), launched 12:00Z, 11.9 hours before the alert went out and 271 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
- 58 J/kg
- Mixed-layer CIN
- -81 J/kg
- Mixed-layer LCL
- 502 m above ground
- 0-6 km bulk shear
- 46 kt
- 0-1 km storm-relative helicity
- 287 m²/s²
- 0-3 km storm-relative helicity
- 313 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 1.7
The text
As transmitted, in the capitals the NWS used until 2016.
000 TTAA00 KHOU 212351 RRA SVRHOU TXC185-220040- BULLETIN - IMMEDITATE BROADCAST REQUESTED SEVERE THUNDERSTORM WARNING NATIONAL WEATHER SERVICE HOUSTON/GALVESTON TX 552 PM CST WED JAN 21 1998 THE NATIONAL WEATHER SERVICE IN HOUSTON/GALVESTON TX HAS ISSUED A SEVERE THUNDERSTORM WARNING EFFECTIVE UNTIL 640 PM CST FOR PEOPLE IN THE FOLLOWING LOCATION... IN SOUTHEASTERN TEXAS ...GRIMES COUNTY AT 550 PM CST... WEATHER RADAR INDICATED A SEVERE THUNDERSTORM LOCATED 4 MILES NORTHEAST OF ANDERSON MOVING EAST AT 20 MPH. RICHARDS IS IN THE PATH OF THIS SEVERE THUNDERSTORM. THIS STORM WILL LIKELY CONTAIN LARGE HAIL. A TORNADO WATCH IS ALSO IN EFFECT FOR THE WARNED AREA. REMEMBER... SEVERE THUNDERSTORMS CAN AND OCCASIONAL0LY DO PRODUCE TORNADOES WITH LITTLE OR NO ADVANCE WARNING. REMAIN CALM BUT BE ALERT TO RAPIDLY CHANGING WEATHER CONDITIONS.
The office that day
Everything else NWS Houston/Galveston, TX issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jan 21, 1:17 PM CST | Severe Thunderstorm Warning | HGX | Colorado | 58 min |
| Jan 21, 1:45 PM CST | Severe Thunderstorm Warning | HGX | Austin | 60 min |
| Jan 21, 1:58 PM CST | Tornado Warning | HGX | Austin, Colorado | 62 min |
| Jan 21, 3:05 PM CST | Tornado Warning | HGX | Burleson | 60 min |
| Jan 21, 3:15 PM CST | Severe Thunderstorm Warning | HGX | Matagorda | 60 min |
| Jan 21, 3:28 PM CST | Tornado Warning | HGX | Jackson | 62 min |
| Jan 21, 3:41 PM CST | Severe Thunderstorm Warning | HGX | Washington | 64 min |
| Jan 21, 4:04 PM CST | Tornado Warning | HGX | Burleson | 46 min |
| Jan 21, 4:11 PM CST | Severe Thunderstorm Warning | HGX | Brazos | 64 min |
| Jan 21, 4:47 PM CST | Tornado Warning | HGX | Madison | 63 min |
| Jan 21, 4:48 PM CST | Tornado Warning | HGX | Brazos, Grimes | 62 min |
| Jan 21, 4:57 PM CST | Severe Thunderstorm Warning | HGX | Fort Bend, Wharton | 63 min |
| Jan 21, 5:00 PM CST | Severe Thunderstorm Warning | HGX | Jackson, Matagorda | 65 min |
| Jan 21, 5:21 PM CST | Tornado Warning | HGX | Matagorda | 64 min |
| Jan 21, 5:25 PM CST | Tornado Warning | HGX | Montgomery, Walker | 65 min |
| Jan 21, 5:34 PM CST | Tornado Warning | HGX | Houston, Madison | 66 min |
| Jan 21, 5:59 PM CST | Severe Thunderstorm Warning | HGX | Fort Bend | 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; verification from NCEI's Storm Data; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.