Alert archive / Texas / Severe Thunderstorm Warnings in 1997
Severe Thunderstorm Warning 71, NWS Houston/Galveston, TX
NWS Houston/Galveston, TX issued this severe thunderstorm warning at Apr 27, 1997, 3:50 AM CDT for Brazoria County, Texas. It was in force for 25 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
- Apr 27, 1997, 3:50 AM CDT (08:50 UTC)
- Expired
- Apr 27, 1997, 4:15 AM CDT
- In force
- 25 min
- Issued by
- NWS Houston/Galveston, TX
- Area
- Whole counties
County Brazoria County, TX
The radar
The Houston radar (KHGX), 48 km from the middle of the area, began a volume at 08:52 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, 8.8 hours before the alert went out and 240 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
- 73 J/kg
- Mixed-layer CIN
- -281 J/kg
- Mixed-layer LCL
- 600 m above ground
- 0-6 km bulk shear
- 58 kt
- 0-1 km storm-relative helicity
- 139 m²/s²
- 0-3 km storm-relative helicity
- 180 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.2
The text
As transmitted, in the capitals the NWS used until 2016.
384 WUUS1 KHOU 270851 RRA SVRHOU TXC039-270915- BULLETIN - IMMEDIATE BROADCAST REQUESTED SEVERE THUNDERSTORM WARNING NATIONAL WEATHER SERVICE HOUSTON/GALVESTON TX 350 AM CDT SUN APR 27 1997 THE NATIONAL WEATHER SERVICE IN HOUSTON/GALVESTON HAS ISSUED A SEVERE THUNDERSTORM WARNING EFFECTIVE UNTIL 415 AM CDT FOR PEOPLE IN THE FOLLOWING LOCATION... IN SOUTHEAST TEXAS ...BRAZORIA COUNTY AT 345 AM..RADAR INDICATED SEVERE THUNDERSTORM NEAR ANGLETON. THIS STORM IS MOVING TO THE NORTH NORTHEAST AT 30 MPH. ALVIN IS IN THE PATH OF THIS STORM. THIS IS A DANGEROUS STORM. IF YOU ARE IN ITS PATH...PREPARE FOR DAMAGING WIND IN EXCESS OF 55 MPH...LARGE HAIL...AND VERY HEAVY RAIN. IF CAUGHT OUTSIDE... MOVE TO A SHELTER... PREFERABLY INSIDE A STRONG BUILDING BUT STAY AWAY FROM WINDOWS.
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 Apr 27, 3:32 AM CDT, 18 minutes earlier.
Area forecast discussion, Apr 27, 3:32 AM CDT, 18 minutes before
SOUTHEAST TEXAS FORECAST DISCUSSION
NATIONAL WEATHER SERVICE HOUSTON/GALVESTON TX
232 AM CDT SUN APR 27 1997
UPPER LOW TO THE SW BEGINNING TO MOVE TOWARD TX. SPEED MAX CURRENTLY
MOVING TO THE N THROUGH TX ASSISTING SVR TSTM DEVELOPMENT. LARGE
HAIL HAS BEEN REPORTED WITH A VIL FOR THIS CELL RIGHT AROUND 50.
MORE STORMS TO THE S ARE MOVING N TOWARD HOUSTON AREA. SO FAR...NO
FLOODING PROBLEMS ANYWHERE. MODELS SHOW MOST SIGNIFICANT UVV VALUES
FROM LA EASTWARD WHERE THETA-E RIDGE SHIFTS TO DURING THIS FORECAST.
UNCERTAIN AS TO HOW MUCH RAIN WILL DEVELOP WITH THE CURRENT ACTIVITY
MOVING THIS WAY FROM THE S. WITH UPPER LOW STILL PROGGED TO MOVE
RIGHT ACROSS SE TX...ELEVATED STORMS STILL CAPABLE OF DUMPING SOME
LOCALLY HEAVY RAINS. WOULD THEREFORE LIKE TO KEEP THE FLASH FLOOD
WATCH UP FOR THIS MORNING FOR ALL OF SE TX AND MENTION LOCALLY HEAVY
RAINS IN THE ZONES. COASTAL FLOOD WARNING WILL NOT NEED TO BE
REISSUED. WINDS HAVE BEEN FROM THE N TO NW FOR A WHILE NOW...AND
TIDE READINGS FROM THE HOUSTON/GALVESTON PORTS SYSTEM ARE DOWN TO
1.50 TO 2 FEET ABOVE NORMAL. EXPECT THESE READINGS TO CONTINUE TO
DECREASE. WILL COVER SITUATION WITH AN MWSHOU.
MOISTURE VALUES BEGIN TO DECREASE AFTER 36 HOURS (12Z MONDAY MORNING)
AS LOW PRESSURE NEAR THE ARKLATEX CONTINUES TO MOVE OFF TO THE E.
WILL CALL FOR SKIES TO BECOME PARTLY CLOUDY ON MONDAY AND WILL BRING
RAIN CHANCES DOWN TO ZERO. DRY COUPLE OF DAYS TO FOLLOW AFTER MONDAY.
PRELIM DETAILS ARE NEXT.
FLASH FLOOD WATCH THIS MORNING
LOCALLY HEAVY RAIN POSSIBLE TODAY
CLL T/C BECOMING B/V 63/51 76 51 6400
IAH T/C BECOMING B/V 66/55 76 52 7400
GLS T/C BECOMING B/V 67/62 74 60 7400
42In the hours before
Special weather statement, Apr 27, 12:15 AM CDT, 3 hours 35 minutes before
TXZ211-237-210-227-198-213-163-200-511-236-199-179-178-164-177- 212-197-226-196-195-214-238-235-176-271115- SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE HOUSTON/GALVESTON TX 1217 AM CDT SUN APR 27 1997 THE NATIONAL WEATHER SERVICE HAS ISSUED A SEVERE THUNDERSTORM WATCH FOR ALL OF SOUTHEAST TEXAS UNTIL 600 AM THIS SUNDAY MORNING. THIS WATCH INCLUDES AUSTIN...BRAZORIA...BRAZOSCHAMBERS...COLOTADO...FORT BEND... GALVESTON...GRIMES...HARRIS...HOUSTON...MONTGOMERY...POLK...SAN JACINTO. TRINITY...WALKER...WALLER...WASTHIGTON...WHARTON...JACKSON... MATAGORDA COUNTIES. A SEVERE THUNDERSTORM WATCH MEANS SEVERE THUNDERSTORMS ARE POSSIBLE IN AND NEAR THE WATCH AREA.
Special weather statement, Apr 27, 12:17 AM CDT, 3 hours 33 minutes before
TXZ211-237-210-227-198-213-163-200-511-236-199-179-178-164-177- 212-197-226-196-195-214-238-235-176-271115- SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE HOUSTON/GALVESTON TX 1217 AM CDT SUN APR 27 1997 THE NATIONAL WEATHER SERVICE HAS ISSUED A SEVERE THUNDERSTORM WATCH FOR ALL OF SOUTHEAST TEXAS UNTIL 600 AM THIS SUNDAY MORNING. THIS WATCH INCLUDES AUSTIN...BRAZORIA...BRAZOSCHAMBERS...COLOTADO...FORT BEND... GALVESTON...GRIMES...HARRIS...HOUSTON...MONTGOMERY...POLK...SAN JACINTO. TRINITY...WALKER...WALLER...WASTHIGTON...WHARTON...JACKSON... MATAGORDA COUNTIES. A SEVERE THUNDERSTORM WATCH MEANS SEVERE THUNDERSTORMS ARE POSSIBLE IN AND NEAR THE WATCH AREA.
The office that day
Everything else NWS Houston/Galveston, TX issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Apr 26, 11:03 PM CDT | Severe Thunderstorm Warning | HGX | Austin, Colorado | 57 min |
| Apr 26, 11:31 PM CDT | Severe Thunderstorm Warning | HGX | Washington | 59 min |
| Apr 26, 11:52 PM CDT | Severe Thunderstorm Warning | HGX | Waller | 38 min |
| Apr 27, 12:02 AM CDT | Severe Thunderstorm Warning | HGX | Grimes, Montgomery | 58 min |
| Apr 27, 12:45 AM CDT | Severe Thunderstorm Warning | HGX | Walker | 60 min |
| Apr 27, 1:03 AM CDT | Severe Thunderstorm Warning | HGX | San Jacinto | 57 min |
| Apr 27, 1:20 AM CDT | Severe Thunderstorm Warning | HGX | Polk | 55 min |
| Apr 27, 2:00 AM CDT | Severe Thunderstorm Warning | HGX | Trinity | 45 min |
| Apr 27, 4:09 AM CDT | Severe Thunderstorm Warning | HGX | Galveston | 66 min |
| Apr 27, 4:21 AM CDT | Severe Thunderstorm Warning | HGX | Harris | 54 min |
| Apr 27, 5:06 AM CDT | Severe Thunderstorm Warning | HGX | Liberty | 69 min |
| Apr 27, 5:37 AM CDT | Severe Thunderstorm Warning | HGX | Brazoria | 53 min |
| Apr 27, 8:16 AM CDT | Severe Thunderstorm Warning | HGX | Brazoria | 64 min |
| Apr 27, 8:49 AM CDT | Severe Thunderstorm Warning | HGX | Harris | 56 min |
| Apr 27, 9:17 AM CDT | Severe Thunderstorm Warning | HGX | Harris, Liberty | 58 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; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.