Alert archive / Texas / Severe Thunderstorm Watches in 2006
Severe Thunderstorm Watch 252
The Storm Prediction Center issued this severe thunderstorm watch at Apr 25, 2006, 7:16 PM CDT for 8 counties in Texas. It was in force for 5 hr.
The area
The outline as issued.
The facts
- Issued
- Apr 25, 2006, 7:16 PM CDT (00:16 UTC)
- Expired
- Apr 26, 2006, 12:00 AM CDT
- In force
- 5 hr
- Issued by
- the Storm Prediction Center
- Largest hail expected
- 2 in
- Strongest gust expected
- 60 kt
Counties Brooks County, TX, Cameron County, TX, Hidalgo County, TX, Jim Hogg County, TX, Kenedy County, TX, Starr County, TX, Willacy County, TX, Zapata County, TX
The radar
The Brownsville radar (KBRO), 142 km from the middle of the area, began a volume at 00:15 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 SPC expected
The probabilities SPC published with the watch, for the watch area over its life.
- Two or more tornadoes
- 10%
- One or more EF2 to EF5 tornadoes
- 2%
- Ten or more severe wind reports
- 30%
- One or more gusts of 65 knots or more
- 20%
- Ten or more severe hail reports
- 30%
- One or more hailstones of 2 inches or more
- 20%
- Six or more combined severe hail and wind reports
- 60%
Warnings issued inside it
13 tornado, severe thunderstorm and flash flood warnings for its counties while it was in force.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Apr 25, 7:25 PM CDT | Tornado Warning | BRO | Brooks | 31 min |
| Apr 25, 7:30 PM CDT | Severe Thunderstorm Warning | BRO | Brooks, Hidalgo, Kenedy | 36 min |
| Apr 25, 7:32 PM CDT | Severe Thunderstorm Warning | BRO | Jim Hogg, Zapata | 58 min |
| Apr 25, 8:03 PM CDT | Severe Thunderstorm Warning | BRO | Jim Hogg | 57 min |
| Apr 25, 8:21 PM CDT | Severe Thunderstorm Warning | BRO | Jim Hogg, Starr, Zapata | 54 min |
| Apr 25, 8:58 PM CDT | Severe Thunderstorm Warning | BRO | Brooks, Jim Hogg, Starr | 48 min |
| Apr 25, 9:09 PM CDT | Tornado Warning | BRO | Brooks, Jim Hogg | 36 min |
| Apr 25, 9:13 PM CDT | Severe Thunderstorm Warning | BRO | Starr | 47 min |
| Apr 25, 9:36 PM CDT | Flash Flood Warning | BRO | Starr | 84 min |
| Apr 25, 10:05 PM CDT | Severe Thunderstorm Warning | BRO | Starr, Zapata | 25 min |
| Apr 25, 10:28 PM CDT | Flash Flood Warning | BRO | Jim Hogg, Zapata | 2 hr |
| Apr 25, 10:33 PM CDT | Severe Thunderstorm Warning | BRO | Zapata | 42 min |
| Apr 25, 11:45 PM CDT | Flash Flood Warning | BRO | Jim Hogg, Starr, Zapata | 90 min |
Discussions around it
SPC mesoscale discussions over the same counties from four hours before the watch to its end.
The nearest sounding before it
Brownsville Intl, TX (KBRO), launched 00:00Z, 0.3 hours before the alert went out and 144 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
- 2694 J/kg
- Mixed-layer CIN
- -242 J/kg
- Mixed-layer LCL
- 969 m above ground
- 0-6 km bulk shear
- 42 kt
- 0-1 km storm-relative helicity
- 88 m²/s²
- 0-3 km storm-relative helicity
- 134 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.5
The text
As transmitted, in the capitals the NWS used until 2016.
000
WWUS20 KWNS 260015
SEL2
SPC WW 260015
TXZ000-CWZ000-260400-
URGENT - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WATCH NUMBER 252
NWS STORM PREDICTION CENTER NORMAN OK
715 PM CDT TUE APR 25 2006
THE NWS STORM PREDICTION CENTER HAS ISSUED A
SEVERE THUNDERSTORM WATCH FOR PORTIONS OF
SOUTH TEXAS
COASTAL WATERS
EFFECTIVE THIS TUESDAY EVENING FROM 715 PM UNTIL 1100 PM 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 APPROXIMATELY ALONG AND 60
STATUTE MILES NORTH AND SOUTH OF A LINE FROM 90 MILES WEST
NORTHWEST OF MCALLEN TEXAS TO 50 MILES NORTHEAST OF BROWNSVILLE
TEXAS. FOR A COMPLETE DEPICTION OF THE WATCH SEE THE ASSOCIATED
WATCH OUTLINE UPDATE (WOUS64 KWNS WOU2).
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...CONTINUE...WW 249...WW 250...WW 251...
DISCUSSION...SEVERE THUNDERSTORMS WILL CONTINUE DEVELOPING SWD INTO
A VERY UNSTABLE AIR MASS FAR S TX. WITH MLCAPES IN EXCESS OF 3000
J/KG AND MARGINAL SHEAR LARGE HAIL AND BRIEF SEVERE DOWNBURSTS WILL
BE PRIMARY THREAT.
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 550. MEAN STORM
MOTION VECTOR 32020.
...HALESSPC that day
Everything else SPC issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Apr 25, 7:31 PM CDT | Mesoscale Discussion | SPC | Aransas, Atascosa, Austin, Bee, Brazoria, Calhoun and 36 more | 89 min |
| Apr 25, 8:45 PM CDT | Mesoscale Discussion | SPC | Jasper, Newton, Sabine, San Augustine, Shelby, Tyler | 90 min |
| Apr 25, 9:38 PM CDT | Mesoscale Discussion | SPC | Brooks, Cameron, Hidalgo, Jim Hogg, Kenedy, Starr and 2 more | 97 min |
| Apr 25, 9:42 PM CDT | Severe Thunderstorm Watch | SPC | Angelina, Brazoria, Chambers, Galveston, Gregg, Hardin and 13 more | 6 hr |
| Apr 25, 11:42 PM CDT | Mesoscale Discussion | SPC | Angelina, Chambers, Galveston, Hardin, Jasper, Jefferson and 7 more | 63 min |
| Apr 25, 11:57 PM CDT | Mesoscale Discussion | SPC | Bandera, Bastrop, Bexar, Blanco, Brazos, Burleson and 16 more | 93 min |
| Apr 26, 1:01 AM CDT | Severe Thunderstorm Watch | SPC | Austin, Bastrop, Brazoria, Caldwell, Chambers, Colorado and 19 more | 6 hr |
| Apr 26, 3:19 AM CDT | Mesoscale Discussion | SPC | Angelina, Austin, Bastrop, Brazoria, Caldwell, Chambers and 29 more | 86 min |
| Apr 26, 6:05 AM CDT | Mesoscale Discussion | SPC | Grimes, Liberty, Montgomery, Polk, San Jacinto, Trinity and 1 more | 55 min |
Nearby
Severe Thunderstorm Watches in Texas, 2006Every severe thunderstorm watch in 2006
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.