Alert archive / Texas / Severe Thunderstorm Warnings in 2006
Severe Thunderstorm Warning 56, NWS San Angelo, TX
NWS San Angelo, TX issued this severe thunderstorm warning at Apr 20, 2006, 11:27 AM CDT for Schleicher County, Tom Green County, Texas. It was in force for 63 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 20, 2006, 11:27 AM CDT (16:27 UTC)
- Expired
- Apr 20, 2006, 12:30 PM CDT
- In force
- 63 min
- Issued by
- NWS San Angelo, TX
- Area
- Counties, with a storm outline in the text
Counties Schleicher County, TX, Tom Green County, TX
The radar
The San Angelo radar (KSJT), 25 km from the middle of the area, began a volume at 16:26 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 watch it was issued in
The SPC watch in force over the same counties when this warning went out.
| Issued | Product | Office | Lasted |
|---|---|---|---|
| Apr 20, 9:30 AM CDT | Severe Thunderstorm Watch | SPC | 7 hr |
The nearest sounding before it
Del Rio, TX (KDRT), launched 12:00Z, 4.5 hours before the alert went out and 201 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
- 1378 J/kg
- Mixed-layer CIN
- -155 J/kg
- Mixed-layer LCL
- 702 m above ground
- 0-6 km bulk shear
- 39 kt
- 0-1 km storm-relative helicity
- 82 m²/s²
- 0-3 km storm-relative helicity
- 143 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.8
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 San Angelo, TX wrote its last area forecast discussion before this severe thunderstorm warning went out at Apr 20, 11:06 AM CDT, 21 minutes earlier.
Area forecast discussion, Apr 20, 11:06 AM CDT, 21 minutes before
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</html>Hazardous weather outlook, Apr 20, 5:52 AM CDT, 5 hours 35 minutes before
HAZARDOUS WEATHER OUTLOOK...CORRECTED NATIONAL WEATHER SERVICE SAN ANGELO TX 552 AM CDT THU APR 20 2006 TXZ049-054-064>066-071>073-076>078-098-099-113-114-127-128-139- 140-154-155-168>170-211100- FISHER-NOLAN-STERLING-COKE-RUNNELS-IRION-TOM GREEN-CONCHO- CROCKETT-SCHLEICHER-SUTTON-HASKELL-THROCKMORTON-JONES-SHACKELFORD- TAYLOR-CALLAHAN-COLEMAN-BROWN-MCCULLOCH-SAN SABA-MENARD-KIMBLE- MASON- 552 AM CDT THU APR 20 2006 THIS HAZARDOUS WEATHER OUTLOOK IS FOR PORTIONS OF WEST CENTRAL TEXAS. .DAY ONE...TODAY AND TONIGHT THERE IS A SLIGHT RISK OF SEVERE THUNDERSTORMS OVER ALL OF WEST CENTRAL TEXAS TODAY. A STRONGER UPPER LEVEL DISTURBANCE WILL MOVE EAST ACROSS NEW MEXICO AND INTO WEST TEXAS BY THIS EVENING. A NEARLY STATIONARY FRONT ACROSS THE HILL COUNTRY AND EDWARDS PLATEAU WILL MOVE BACK NORTH AS A WARM FRONT TODAY...POSSIBLY REACHING A MERTZON TO SAN ANGELO TO BROWNWOOD LINE THIS AFTERNOON. A DRYLINE WILL ADVANCE EAST INTO THE PERMAIN BASIN AND TRANS PECOS REGIONS. WEAK LOW PRESSURE COULD DEVELOP IN WEST TEXAS THIS AFTERNOON AND MAY TRACK EAST ALONG THE WARM FRONT THIS EVENING. AS THE UPPER LEVEL DISTURBANCE APPROACHES AND THE WARM FRONT BEGINS TO LIFT NORTH...THUNDERSTORMS WILL CONTINUE TO DEVELOP EARLY THIS MORNING ACROSS THE NORTHERN HALF OF WEST CENTRAL TEXAS. ADDITIONAL STORMS WILL DEVELOP ACROSS WEST CENTRAL TEXAS THIS AFTERNOON. GIVEN THE LIFT WITH THE DISTURBANCE ALONG WITH FAVORABLE VERTICAL WIND SHEAR AND INCREASING INSTABILITY...SEVERE STORMS WITH LARGE HAIL AND DAMAGING WINDS WILL BE POSSIBLE. STORMS WHICH OCCUR IN THE VICINITY OF THE WARM FRONT AND NEAR THE LOW PRESSURE CENTER WILL HAVE THE POTENTIAL TO PRODUCE A TORNADO. THE EXTENT AND MAGNITUDE OF THE SEVERE WEATHER WILL DEPEND IN LARGE PART ON HOW UNSTABLE THE AIRMASS BECOMES. IF THUNDERSTORM DEVELOPMENT INCREASES AND BECOMES MORE WIDESPREAD THIS MORNING...THE AIRMASS WILL BE LESS UNSTABLE THIS AFTERNOON. SINCE SIGNIFICANT SEVERE WEATHER WILL BE POSSIBLE...PEOPLE ACROSS WEST CENTRAL TEXAS ARE ENCOURAGED TO CHECK LATER FORECASTS AND INFORMATION CONCERNING THE SEVERE WEATHER POTENTIAL FOR TODAY AND EARLY TONIGHT. .DAYS TWO THROUGH SEVEN...FRIDAY THROUGH WEDNESDAY SCATTERED THUNDERSTORMS WILL BE POSSIBLE FROM SATURDAY NIGHT INTO THE FIRST PART OF NEXT WEEK...WHEN UPPER LEVEL DISTURBANCES ARE FORECAST TO MOVE EAST INTO THE REGION AND INTERACT WITH A DRYLINE OVER WEST TEXAS. .SPOTTER INFORMATION STATEMENT... SPOTTER ACTIVATION WILL LIKELY BE NEEDED A TIMES TODAY AND THIS EVENING.
In the hours before
Special weather statement, Apr 20, 6:04 AM CDT, 5 hours 23 minutes before
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</html>Special weather statement, Apr 20, 9:27 AM CDT, 2 hours before
SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE SAN ANGELO TX 927 AM CDT THU APR 20 2006 TXZ076-201500- CROCKETT TX- 927 AM CDT THU APR 20 2006 ...SIGNIFICANT WEATHER ALERT EFFECTIVE UNTIL 1000 AM CDT FOR CROCKETT COUNTY... AT 925 AM CDT...A STRONG THUNDERSTORM WAS INDICATED BY NATIONAL WEATHER SERVICE DOPPLER RADAR OVER EXTREME NORTHWESTERN CROCKETT COUNTY...OR ABOUT 12 MILES SOUTHEAST OF MCCAMEY...MOVING NORTHEAST AT 25 MPH. THE STRONG THUNDERSTORM WILL REMAIN OVER MAINLY RURAL AREAS OF... NORTHWESTERN CROCKETT COUNTY. A SEVERE THUNDERSTORM WATCH REMAINS IN EFFECT UNTIL 1100 AM CDT THURSDAY MORNING FOR WEST CENTRAL TEXAS.
Special weather statement, Apr 20, 11:20 AM CDT, 7 minutes before
SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE SAN ANGELO TX 1120 AM CDT THU APR 20 2006 TXZ071-072-076-077-201715- TOM GREEN TX-IRION TX-SCHLEICHER TX-CROCKETT TX- 1120 AM CDT THU APR 20 2006 ...SIGNIFICANT WEATHER ALERT EFFECTIVE UNTIL 1215 PM CDT FOR TOM GREEN...IRION...SCHLEICHER AND CROCKETT COUNTIES... AT 1117 AM CDT...A CLUSTER OF STRONG THUNDERSTORMS WAS INDICATED BY NATIONAL WEATHER SERVICE DOPPLER RADAR IN SCHLEICHER AND SUTTON COUNTIES...MOVING NORTHEAST AT 40 MPH. * STRONG THUNDERSTORMS WILL BE NEAR... THE INTERSECTION OF US-190 AND RANCH ROAD 2084 BY 1130 AM CDT THE SCHLEICHER-TOM GREEN COUNTY LINE BY 1145 AM CDT SHERWOOD AND MERTZON BY 1150 AM CDT KNICKERBOCKER AND CHRISTOVAL BY 1155 AM CDT SMALL HAIL AND WIND GUSTS TO 50 MPH ARE POSSILBE WITH THESE STORMS. HEAVY RAINFALL MAY CAUSE PONDING OF WATER ON ROADWAYS...ESPECIALLY IN POOR DRAINAGE AREAS. RESIDENTS ARE ENCOURAGED TO MONITOR THE SITUATION CLOSELY AND BE PREPARED TO TAKE THE PROPER ACTIONS SHOULD A WARNING BE ISSUED. A SEVERE THUNDERSTORM WATCH REMAINS IN EFFECT UNTIL 400 PM CDT THURSDAY AFTERNOON FOR WEST CENTRAL TEXAS.
The office that day
Everything else NWS San Angelo, TX issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Apr 19, 7:11 PM CDT | Severe Thunderstorm Warning | SJT | Sutton | 34 min |
| Apr 19, 7:42 PM CDT | Severe Thunderstorm Warning | SJT | Kimble, Sutton | 22 min |
| Apr 19, 7:45 PM CDT | Severe Thunderstorm Warning | SJT | Kimble, Mason | 38 min |
| Apr 19, 8:11 PM CDT | Severe Thunderstorm Warning | SJT | Concho, Runnels | 49 min |
| Apr 19, 8:35 PM CDT | Severe Thunderstorm Warning | SJT | Jones, Taylor | 40 min |
| Apr 19, 8:50 PM CDT | Severe Thunderstorm Warning | SJT | Callahan, Shackelford | 55 min |
| Apr 19, 9:04 PM CDT | Severe Thunderstorm Warning | SJT | Sterling | 41 min |
| Apr 19, 9:07 PM CDT | Severe Thunderstorm Warning | SJT | Nolan | 53 min |
| Apr 19, 9:43 PM CDT | Severe Thunderstorm Warning | SJT | Coke, Nolan, Sterling | 32 min |
| Apr 19, 9:52 PM CDT | Severe Thunderstorm Warning | SJT | Taylor | 53 min |
| Apr 20, 12:39 AM CDT | Severe Thunderstorm Warning | SJT | Fisher, Jones, Nolan, Taylor | 36 min |
| Apr 20, 1:12 AM CDT | Severe Thunderstorm Warning | SJT | Jones, Taylor | 33 min |
| Apr 20, 1:44 AM CDT | Severe Thunderstorm Warning | SJT | Jones, Taylor | 31 min |
| Apr 20, 3:24 AM CDT | Flash Flood Watch | SJT | Callahan, Fisher, Jones, Nolan, Shackelford, Taylor | 7 hr |
| Apr 20, 10:03 AM CDT | Flash Flood Watch | SJT | Callahan, Fisher, Haskell, Jones, Nolan, Shackelford and 2 more | 18 hr |
| Apr 20, 12:00 PM CDT | Severe Thunderstorm Warning | SJT | Sutton | 30 min |
| Apr 20, 12:27 PM CDT | Flash Flood Warning | SJT | Kimble, Sutton | 2 hr |
| Apr 20, 12:32 PM CDT | Severe Thunderstorm Warning | SJT | Kimble, Sutton | 43 min |
| Apr 20, 1:14 PM CDT | Flash Flood Warning | SJT | Kimble | 2 hr |
| Apr 20, 1:17 PM CDT | Severe Thunderstorm Warning | SJT | Kimble | 58 min |
| Apr 20, 1:26 PM CDT | Severe Thunderstorm Warning | SJT | Concho, Tom Green | 49 min |
| Apr 20, 2:13 PM CDT | Severe Thunderstorm Warning | SJT | Coleman, Concho, McCulloch | 47 min |
| Apr 20, 2:14 PM CDT | Severe Thunderstorm Warning | SJT | Menard, Schleicher | 61 min |
| Apr 20, 4:17 PM CDT | Severe Thunderstorm Warning | SJT | McCulloch, Mason, San Saba | 58 min |
| Apr 20, 4:42 PM CDT | Severe Thunderstorm Warning | SJT | Concho | 63 min |
| Apr 20, 5:25 PM CDT | Severe Thunderstorm Warning | SJT | San Saba | 50 min |
| Apr 20, 5:34 PM CDT | Severe Thunderstorm Warning | SJT | Concho, McCulloch, Menard | 41 min |
| Apr 20, 6:04 PM CDT | Severe Thunderstorm Warning | SJT | McCulloch, Mason, Menard, San Saba | 56 min |
| Apr 20, 6:57 PM CDT | Severe Thunderstorm Warning | SJT | McCulloch, Mason, San Saba | 48 min |
Nearby
Severe Thunderstorm Warnings in Texas, 2006Every severe thunderstorm warning 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.