Alert archive / Texas / Severe Thunderstorm Warnings in 1997
Severe Thunderstorm Warning 237, NWS Houston/Galveston, TX
NWS Houston/Galveston, TX issued this severe thunderstorm warning at Dec 7, 1997, 8:59 PM CST for Chambers County, Texas. It was in force for 2 hr. 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
- Dec 7, 1997, 8:59 PM CST (02:59 UTC)
- Expired
- Dec 7, 1997, 11:00 PM CST
- In force
- 2 hr
- 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 03:01 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 |
|---|---|---|---|
| Dec 7, 9:05 PM CST | Thunderstorm Wind | Anahuac, TX | Powerlines blown down. |
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 nearest sounding before it
Lake Charles Mun, LA (KLCH), launched 00:00Z, 3.0 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
- 0 J/kg
- Mixed-layer CIN
- No buoyant parcel
- Mixed-layer LCL
- 1270 m above ground
- 0-6 km bulk shear
- 64 kt
- 0-1 km storm-relative helicity
- 356 m²/s²
- 0-3 km storm-relative helicity
- 565 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
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 Dec 7, 8:50 PM CST, 9 minutes earlier.
Area forecast discussion, Dec 7, 8:50 PM CST, 9 minutes before
SOUTHEAST TEXAS FORECAST DISCUSSION NATIONAL WEATHER SERVICE HOUSTON/GALVESTON TX 848 PM CST SUN DEC 7 1997 SVR STORMS SPINNING UP ALONG THE WARM FRONT WITH LIKELY MERGERS OF STORMS OVER THE EXTREME SE ZONES. THIS SHOULD PRODUCE A FAIRLY FAST MOVING CLUSTER OF VERY INTENSE RAINFALL EASTWARD ALONG THE COASTAL ZONES OF SETX AND LA. WINDS HAVE BEEN COMING AROUND IN RESPONSE TO MESO LOW NEAR THE OFFICE. SKIES WILL BE SLOW TO CLEAR IN THE WAY OF CLOUDS SOR FOR THE TIME BEING CAN LEAVE THEM CLOUDY. WILL HAVE TO UPDATE ZONES BEFORE MIDNIGHT. 45 CLL T/B A/B 049/072 050/072 4000 SHRA IAH T/B A/B 052/072 051/072 7000 TSRA GLS T/B A/B 061/071 062/071 7000 TSRA
The office that day
Everything else NWS Houston/Galveston, TX issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Dec 7, 7:51 PM CST | Severe Thunderstorm Warning | HGX | Harris | 54 min |
| Dec 7, 8:40 PM CST | Flash Flood Warning | HGX | Chambers | 2 hr |
| Dec 7, 9:09 PM CST | Severe Thunderstorm Warning | HGX | Brazoria, Galveston | 66 min |
| Dec 7, 9:28 PM CST | Flash Flood Warning | HGX | Galveston | 62 min |
| Dec 8, 12:31 AM CST | Flash Flood Warning | HGX | Galveston | 119 min |
Nearby
Severe Thunderstorm Warnings in Texas, 1997Every severe thunderstorm warning in 1997
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.