Alert archive / Texas / Severe Thunderstorm Warnings in 1997
Severe Thunderstorm Warning 229, NWS Houston/Galveston, TX
NWS Houston/Galveston, TX issued this severe thunderstorm warning at Nov 5, 1997, 8:47 AM CST for Trinity County, Texas. It was in force for 58 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
- Nov 5, 1997, 8:47 AM CST (14:47 UTC)
- Expired
- Nov 5, 1997, 9:45 AM CST
- In force
- 58 min
- Issued by
- NWS Houston/Galveston, TX
- Area
- Whole counties
County Trinity County, TX
The radar
The Houston radar (KHGX), 180 km from the middle of the area, began a volume at 14:47 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 |
|---|---|---|---|
| Nov 5, 8:47 AM CST | Hail 0.88 | Groveton, 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 |
|---|---|---|---|
| Nov 5, 7:00 AM CST | Severe Thunderstorm Watch | SPC | 5 hr |
The nearest sounding before it
Shreveport, LA (KSHV), launched 12:00Z, 2.8 hours before the alert went out and 203 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
- 85 J/kg
- Mixed-layer CIN
- -182 J/kg
- Mixed-layer LCL
- 621 m above ground
- 0-6 km bulk shear
- 41 kt
- 0-1 km storm-relative helicity
- 466 m²/s²
- 0-3 km storm-relative helicity
- 616 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 8.7
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 Nov 5, 2:25 AM CST, 6 hours 22 minutes earlier.
Area forecast discussion, Nov 5, 2:25 AM CST, 6 hours 22 minutes before
SOUTHEAST TEXAS FORECAST DISCUSSION NATIONAL WEATHER SERVICE HOUSTON/GALVESTON TX 225 AM CST WED NOV 5 1997 WAA SHRA/TSRA BECOMING MORE WIDESPREAD THIS MORNING AS AMS OVER SE TX CONTINUES TO MOISTEN AND DESTABILIZE. A COUPLE OF STRONG STORMS HAVE PERSISTED ALONG THE COAST AND LATEST VAD WIND PROFILE INDICATING VERY GOOD INFLOWS (45KT WINDS FROM 2-4KFT). PWs PROGGED TO 1.3-1.5 LATER THIS MORNING AS ROBUST S/W ENERGY RIDES DOWN THE NWLY FLOW ALOFT INTO THE AREA JUST AHEAD OF THE NEXT COLD FRONT. CROSS-SECTIONS STILL IN- DICATING VERY IMPRESSIVE LIFT ASSOCIATED WITH THE LEADING SYSTEM...AS WELL AS SOME DECENT WIND SHEAR WITH HEIGHT THRU THIS AFTN. UPPER JET PATTERN ALSO REMAINS FAVORABLE, AND SHOULD FURTHER ENHANCE CONVECTIVE DEVELOPMENT. ONLY CHANGE FROM PREVIOUS RUNS WOULD THEN BE THAT PROGS HAVE SLOWED THINGS A BIT AND ARE NOW GOING WITH A MID TO LATE MORNING START TO THE FIREWORKS. AS A RESULT, WILL PUSH FROPA TIMES 2-3 HOURS BACK IN THE NEXT SET OF TAFS/ROOUND OF STATEMENTS. WILL CONTINUE THE MENTION OF SEVERE FOR THE 1ST PD. WILL TAKE A BLEND OF GUIDANCE NUM- BERS FOR FINAL TALLY ON TEMPS. 41 PRELIMS... CLL C>B/V U/V 74/46 72/40 6000 (SVR TDY/CLRING AFTN) IAH C>B/V U/V 77/48 70/41 6000 (SVR TDY/CLRING LATE AFTN) GLS C>B/V U/V 76/56 70/52 6000 (SVR TDY/CLRING LATE AFTN)
In the hours before
Special weather statement, Nov 5, 7:00 AM CST, 1 hour 47 minutes before
TXZ163-179-164-051800- SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE HOUSTON/GALVESTON TX 700 AM CST WED NOV 5 1997 THE NATIONAL WEATHER SERVICE HAS ISSUED A SEVERE THUNDERSTORM WATCH FOR THE FOLLOWING COUNTIES IN NORTHERN SOUTHEAST TEXAS: HOUSTON...TRINITY... AND POLK COUNTIES. A STRONG UPPER LEVEL DISTURBANCE CONTINUES TO MOVE THROUGH NORTHERN TEXAS AND WILL APPROACH SOUTHEAST TEXAS THIS MORNING. SHOWERS AND THUNDERSTORMS CONTINUE TO DEVELOP AHEAD OF THIS IMPULSE. THESE STORMS HAVE THE POTENTIAL TO REACH SEVERE LIMITS. STORMS EARLIER THIS MORNING PRODUCED GOLFBALL SIZE HAIL IN HOUSTON COUNTY. REMEMBER...A SEVERE THUNDERSTORM WATCH MEANS THAT CONDITIONS ARE FAVORABLE FOR SEVERE THUNDERSTORMS IN AND NEAR THE WATCH AREA. PEOPLE IN THE WATCH AREA SHOULD KEEP ALERT OF THE LATEST WEATHER CONDITIONS AND BE PREPARED TO SEEK SHELTER SHOULD SEVERE WEATHER APPROACH YOUR AREA. STAY TUNED TO NOAA WEATHER RADIO OR OTHER NEWS SOURCES FOR FURTHER STATEMENTS OR POSSIBLE WARNINGS.
Special weather statement, Nov 5, 7:04 AM CST, 1 hour 43 minutes before
TXZ163-179-164-051800- SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE HOUSTON/GALVESTON TX 700 AM CST WED NOV 5 1997 THE NATIONAL WEATHER SERVICE HAS ISSUED A SEVERE THUNDERSTORM WATCH FOR THE FOLLOWING COUNTIES IN NORTHERN SOUTHEAST TEXAS: HOUSTON...TRINITY... AND POLK COUNTIES. A STRONG UPPER LEVEL DISTURBANCE CONTINUES TO MOVE THROUGH NORTHERN TEXAS AND WILL APPROACH SOUTHEAST TEXAS THIS MORNING. SHOWERS AND THUNDERSTORMS CONTINUE TO DEVELOP AHEAD OF THIS IMPULSE. THESE STORMS HAVE THE POTENTIAL TO REACH SEVERE LIMITS. STORMS EARLIER THIS MORNING PRODUCED GOLFBALL SIZE HAIL IN HOUSTON COUNTY. REMEMBER...A SEVERE THUNDERSTORM WATCH MEANS THAT CONDITIONS ARE FAVORABLE FOR SEVERE THUNDERSTORMS IN AND NEAR THE WATCH AREA. PEOPLE IN THE WATCH AREA SHOULD KEEP ALERT OF THE LATEST WEATHER CONDITIONS AND BE PREPARED TO SEEK SHELTER SHOULD SEVERE WEATHER APPROACH YOUR AREA. STAY TUNED TO NOAA WEATHER RADIO OR OTHER NEWS SOURCES FOR FURTHER STATEMENTS OR POSSIBLE WARNINGS.
The office that day
Everything else NWS Houston/Galveston, TX issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Nov 4, 6:15 PM CST | Severe Thunderstorm Warning | HGX | Matagorda | 60 min |
| Nov 4, 6:36 PM CST | Tornado Warning | HGX | Matagorda | 54 min |
| Nov 4, 10:26 PM CST | Severe Thunderstorm Warning | HGX | Brazoria | 64 min |
| Nov 4, 11:01 PM CST | Severe Thunderstorm Warning | HGX | Brazoria, Matagorda | 59 min |
| Nov 4, 11:34 PM CST | Severe Thunderstorm Warning | HGX | Brazoria | 41 min |
| Nov 5, 12:10 AM CST | Tornado Warning | HGX | Brazoria | 35 min |
| Nov 5, 2:16 AM CST | Severe Thunderstorm Warning | HGX | Brazoria | 59 min |
| Nov 5, 3:25 AM CST | Severe Thunderstorm Warning | HGX | Brazoria | 65 min |
| Nov 5, 3:59 AM CST | Severe Thunderstorm Warning | HGX | Galveston | 61 min |
| Nov 5, 4:06 AM CST | Severe Thunderstorm Warning | HGX | Houston | 69 min |
| Nov 5, 4:30 AM CST | Severe Thunderstorm Warning | HGX | Matagorda | 60 min |
| Nov 5, 4:35 AM CST | Severe Thunderstorm Warning | HGX | Brazoria | 55 min |
| Nov 5, 5:21 AM CST | Severe Thunderstorm Warning | HGX | Houston | 54 min |
| Nov 5, 5:31 AM CST | Severe Thunderstorm Warning | HGX | Brazoria | 59 min |
| Nov 5, 6:00 AM CST | Severe Thunderstorm Warning | HGX | Houston | 60 min |
| Nov 5, 7:02 AM CST | Severe Thunderstorm Warning | HGX | Houston | 58 min |
| Nov 5, 7:26 AM CST | Flash Flood Warning | HGX | Houston | 2 hr |
| Nov 5, 7:26 AM CST | Severe Thunderstorm Warning | HGX | Trinity | 64 min |
| Nov 5, 8:05 AM CST | Severe Thunderstorm Warning | HGX | Houston | 55 min |
| Nov 5, 8:31 AM CST | Flash Flood Warning | HGX | Houston, Trinity | 119 min |
| Nov 5, 8:52 AM CST | Severe Thunderstorm Warning | HGX | Polk | 68 min |
| Nov 5, 10:38 AM CST | Tornado Warning | HGX | Liberty | 37 min |
| Nov 5, 2:55 PM CST | Severe Thunderstorm Warning | HGX | Matagorda | 50 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.