Alert archive / Texas / Severe Thunderstorm Watches in 2002
Severe Thunderstorm Watch 80
The Storm Prediction Center issued this severe thunderstorm watch at Apr 8, 2002, 3:00 AM CDT for 13 counties in Texas. It was in force for 5 hr.
The area
The outline as issued.
The facts
- Issued
- Apr 8, 2002, 3:00 AM CDT (08:00 UTC)
- Expired
- Apr 8, 2002, 8:00 AM CDT
- In force
- 5 hr
- Issued by
- the Storm Prediction Center
Counties Austin County, TX, Brazoria County, TX, Calhoun County, TX, Colorado County, TX, Fort Bend County, TX, Galveston County, TX, Harris County, TX, Jackson County, TX, Liberty County, TX, Matagorda County, TX, Montgomery County, TX, Waller County, TX, Wharton County, TX
The radar
The Houston radar (KHGX), 80 km from the middle of the area, began a volume at 07:59 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.
Warnings issued inside it
4 tornado, severe thunderstorm and flash flood warnings for its counties while it was in force.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Apr 8, 4:25 AM CDT | Severe Thunderstorm Warning | CRP | Calhoun, Victoria | 65 min |
| Apr 8, 6:23 AM CDT | Severe Thunderstorm Warning | HGX | Jackson, Matagorda | 37 min |
| Apr 8, 7:00 AM CDT | Severe Thunderstorm Warning | HGX | Brazoria, Matagorda | 45 min |
| Apr 8, 7:45 AM CDT | Severe Thunderstorm Warning | HGX | Brazoria, Galveston | 30 min |
The nearest sounding before it
Corpus Christi, TX (KCRP), launched 00:00Z, 8.0 hours before the alert went out and 246 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
- 2444 J/kg
- Mixed-layer CIN
- -128 J/kg
- Mixed-layer LCL
- 655 m above ground
- 0-6 km bulk shear
- 58 kt
- 0-1 km storm-relative helicity
- 180 m²/s²
- 0-3 km storm-relative helicity
- 182 m²/s²
- Significant tornado parameter
- 1.5
- Supercell composite
- 6.1
The text
As transmitted, in the capitals the NWS used until 2016.
000 WWUS20 KWNS 080741 SEL0 SPC WW 080735 TXZ000-CWZ000-081300- URGENT - IMMEDIATE BROADCAST REQUESTED SEVERE THUNDERSTORM WATCH NUMBER 80 STORM PREDICTION CENTER NORMAN OK 235 AM CDT MON APR 8 2002 THE STORM PREDICTION CENTER HAS ISSUED A SEVERE THUNDERSTORM WATCH FOR PORTIONS OF SOUTHEAST TEXAS COASTAL WATERS EFFECTIVE THIS MONDAY MORNING FROM 300 AM UNTIL 800 AM CDT. HAIL TO 2 INCHES IN DIAMETER...THUNDERSTORM WIND GUSTS TO 70 MPH...AND DANGEROUS LIGHTNING ARE POSSIBLE IN THESE AREAS. THE SEVERE THUNDERSTORM WATCH AREA IS ALONG AND 55 STATUTE MILES NORTH AND SOUTH OF A LINE FROM 35 MILES NORTHWEST OF PALACIOS TEXAS TO 35 MILES NORTH OF GALVESTON TEXAS. REMEMBER...A SEVERE THUNDERSTORM WATCH MEANS CONDITIONS ARE FAVORABLE FOR SEVERE THUNDERSTORMS IN AND CLOSE TO THE WATCH AREA. PERSONS IN THESE AREAS SHOULD BE ON THE LOOKOUT FOR THREATENING WEATHER CONDITIONS AND LISTEN FOR LATER STATEMENTS AND POSSIBLE WARNINGS. SEVERE THUNDERSTORMS CAN AND OCCASIONALLY DO PRODUCE TORNADOES. OTHER WATCH INFORMATION...THIS SEVERE THUNDERSTORM WATCH REPLACES SEVERE THUNDERSTORM WATCH NUMBER 76. WATCH NUMBER 76 WILL NOT BE IN EFFECT AFTER 300 AM CDT. CONTINUE...WW 77...WW 78...WW 79... DISCUSSION...LARGE SCALE ASCENT WILL CONTINUE TO SUPPORT INCREASING THUNDERSTORMS ACROSS SOUTHEAST TX THROUGH THE REMAINDER OF THE NIGHT...AHEAD OF STRONG UPPER LOW. THIS AREA REMAINS VERY UNSTABLE ABOVE SHALLOW COLD POOL IN THE WAKE OF EXTENSIVE SQUALL LINE NOW MOVING INTO SWRN LA. A PRIMARY THREAT OF LARGE HAIL WILL THEREFORE ACCOMANY STORMS AS THEY DEVELOP INTO THE WW. AVIATION...A FEW SEVERE THUNDERSTORMS WITH HAIL SURFACE AND ALOFT TO 2 INCHES. EXTREME TURBULENCE AND SURFACE WIND GUSTS TO 60 KNOTS. A FEW CUMULONIMBI WITH MAXIMUM TOPS TO 500. MEAN STORM MOTION VECTOR 25035. ...EVANS 295,0963 303,0944 290,0944 281,0963 WWUS20 KWNS 080741 SEL0 SPC WW 080735 TXZ000-CWZ000-081300- URGENT - IMMEDIATE BROADCAST REQUESTED SEVERE THUNDERSTORM WATCH NUMBER 80 STORM PREDICTION CENTER NORMAN OK 235 AM CDT MON APR 8 2002 THE STORM PREDICTION CENTER HAS ISSUED A SEVERE THUNDERSTORM WATCH FOR PORTIONS OF SOUTHEAST TEXAS COASTAL WATERS EFFECTIVE THIS MONDAY MORNING FROM 300 AM UNTIL 800 AM CDT. HAIL TO 2 INCHES IN DIAMETER...THUNDERSTORM WIND GUSTS TO 70 MPH...AND DANGEROUS LIGHTNING ARE POSSIBLE IN THESE AREAS. THE SEVERE THUNDERSTORM WATCH AREA IS ALONG AND 55 STATUTE MILES NORTH AND SOUTH OF A LINE FROM 35 MILES NORTHWEST OF PALACIOS TEXAS TO 35 MILES NORTH OF GALVESTON TEXAS. REMEMBER...A SEVERE THUNDERSTORM WATCH MEANS CONDITIONS ARE FAVORABLE FOR SEVERE THUNDERSTORMS IN AND CLOSE TO THE WATCH AREA. PERSONS IN THESE AREAS SHOULD BE ON THE LOOKOUT FOR THREATENING WEATHER CONDITIONS AND LISTEN FOR LATER STATEMENTS AND POSSIBLE WARNINGS. SEVERE THUNDERSTORMS CAN AND OCCASIONALLY DO PRODUCE TORNADOES. OTHER WATCH INFORMATION...THIS SEVERE THUNDERSTORM WATCH REPLACES SEVERE THUNDERSTORM WATCH NUMBER 76. WATCH NUMBER 76 WILL NOT BE IN EFFECT AFTER 300 AM CDT. CONTINUE...WW 77...WW 78...WW 79... DISCUSSION...LARGE SCALE ASCENT WILL CONTINUE TO SUPPORT INCREASING THUNDERSTORMS ACROSS SOUTHEAST TX THROUGH THE REMAINDER OF THE NIGHT...AHEAD OF STRONG UPPER LOW. THIS AREA REMAINS VERY UNSTABLE ABOVE SHALLOW COLD POOL IN THE WAKE OF EXTENSIVE SQUALL LINE NOW MOVING INTO SWRN LA. A PRIMARY THREAT OF LARGE HAIL WILL THEREFORE ACCOMANY STORMS AS THEY DEVELOP INTO THE WW. AVIATION...A FEW SEVERE THUNDERSTORMS WITH HAIL SURFACE AND ALOFT TO 2 INCHES. EXTREME TURBULENCE AND SURFACE WIND GUSTS TO 60 KNOTS. A FEW CUMULONIMBI WITH MAXIMUM TOPS TO 500. MEAN STORM MOTION VECTOR 25035. ...EVANS 295,0963 303,0944 290,0944 281,0963
SPC that day
Everything else SPC issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Apr 7, 8:00 PM CDT | Severe Thunderstorm Watch | SPC | Atascosa, Bastrop, Bell, Burleson, Caldwell, Collin and 36 more | 5 hr |
| Apr 7, 11:00 PM CDT | Severe Thunderstorm Watch | SPC | Angelina, Austin, Brazoria, Brazos, Colorado, Fort Bend and 14 more | 4 hr |
| Apr 8, 1:00 AM CDT | Severe Thunderstorm Watch | SPC | Aransas, Atascosa, Bee, Bexar, DeWitt, Frio and 12 more | 4 hr |
| Apr 8, 1:15 AM CDT | Severe Thunderstorm Watch | SPC | Chambers, Hardin, Jasper, Jefferson, Liberty, Newton and 4 more | 5 hr |
Nearby
Severe Thunderstorm Watches in Texas, 2002Every severe thunderstorm watch in 2002
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.