Alert archive / Texas / Severe Thunderstorm Warnings in 2007
Severe Thunderstorm Warning 321, NWS San Angelo, TX
NWS San Angelo, TX issued this severe thunderstorm warning at Jun 20, 2007, 3:06 AM CDT for Shackelford County, Texas. It was in force for 24 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
- Jun 20, 2007, 3:06 AM CDT (08:06 UTC)
- Expired
- Jun 20, 2007, 3:30 AM CDT
- In force
- 24 min
- Issued by
- NWS San Angelo, TX
- Area
- Counties, with a storm outline in the text
County Shackelford County, TX
The radar
The Dyess AFB radar (KDYX), 24 km from the middle of the area, began a volume at 08:07 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 |
|---|---|---|---|
| Jun 20, 1:10 AM CDT | Severe Thunderstorm Watch | SPC | 8 hr |
The nearest sounding before it
Fort Worth, TX (KFWD), launched 00:00Z, 8.1 hours before the alert went out and 193 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
- 3576 J/kg
- Mixed-layer CIN
- -10 J/kg
- Mixed-layer LCL
- 1390 m above ground
- 0-6 km bulk shear
- 11 kt
- 0-1 km storm-relative helicity
- -16 m²/s²
- 0-3 km storm-relative helicity
- 27 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
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 Jun 20, 1:27 AM CDT, 1 hour 39 minutes earlier.
Area forecast discussion, Jun 20, 1:27 AM CDT, 1 hour 39 minutes before
AREA FORECAST DISCUSSION...UPDATED NATIONAL WEATHER SERVICE SAN ANGELO TX 127 AM CDT WED JUN 20 2007 .UPDATE... QUICK UPDATE TO ZONES/GRIDS TO ACCOUNT FOR WATCH NO. 426 IN EFFECT UNTIL 9AM FOR POINTS ALONG AND NORTH OF A STERLING CITY... BALLINGER...TO BROWNWOOD LINE INCLUDING ALL OF THE BIG COUNTRY. 11 && .PREV DISCUSSION... /ISSUED 1139 PM CDT TUE JUN 19 2007/ UPDATE... A THUNDERSTORM COMPLEX HAS BEEN DEVELOPING AND PROGRESSING SOUTH ACROSS THE TEXAS PANHANDLE FOR THE LAST COUPLE HOURS. MEANWHILE...ANOTHER LARGER THUNDERSTORM COMPLEX PUSHING SOUTH ACROSS WESTERN OKLAHOMA IS ABOUT TO OVERTAKE IT. WITH LITTLE IF ANY INDICATIONS OF SLOWING EVIDENT IN THE SOUTHWARD PROGRESSION OF EITHER OF THESE...BELIEVE THE BIG COUNTRY MAY SEE SOME SHOWER AND THUNDERSTORM ACTIVITY WITHIN THE NEXT COUPLE HOURS. THUS...RECENT ZONE UPDATE INCLUDED INCREASED CLOUD COVER AND 20 TO 30 POPS FOR THE BIG COUNTRY FOR THE REMAINDER OF TONIGHT. OTHERWISE...NO OTHER CHANGES. 23/HUBER PREV DISCUSSION... /ISSUED 1118 PM CDT TUE JUN 19 2007/ AVIATION... A LARGE COMPLEX OF TSTMS WAS LOCATED OVER OKLAHOMA AND THE TEXAS PANHANDLE. THESE STORMS WERE MOVING SLOWLY SOUTH...AND A FEW OF THESE STORMS MAY MAKE INTO THE BIG COUNTRY LATE TONIGHT AND WEDNESDAY MORNING. LOW LEVEL SOUTH TO SOUTHEAST FLOW IS EXPECTED THROUGH WEDNESDAY. MAINLY VFR CONDITIONS ARE EXPECTED UNTIL 20/10Z. AREAS OF MVFR CIGS BKN010-020 WILL DEVELOP ACROSS WEST CENTRAL TEXAS AFTER 20/10Z...BECOMING MORE WIDESPREAD SOUTH OF I-20 AFTER 20/12Z. 21 PREV DISCUSSION... /ISSUED 338 PM CDT TUE JUN 19 2007/ SHORT TERM... UPPER LEVEL HIGH IS CENTERED OVER THE TEXAS PANHANDLE REGION THIS AFTERNOON WITH THE REMAINS OF THE UPPER LEVEL TROUGH LOCATED OVER THE SOUTHEASTERN STATES. SIGNIFICANT CAPE EXTENDS FROM THE NORTHERN PANHANDLE INTO KANSAS WITH CONVECTIVE IGNITION IN THIS AREA BEGINNING BEFORE NOON TODAY...MUCH FURTHER NORTH THAN PROGD BY THE NAM AND WITH THE GFS BEING SOMEWHERE IN THE BALLPARK. BASED ON CURRENT OBSERVATIONS AND EXTRAPOLATED TRENDS...WILL CONTINUE WITH A DRY FORECAST FOR THE FORECAST AREA IN THE SHORT TERM. A RENEGADE THUNDERSTORM IS CERTAINLY POSSIBLE LATER THIS AFTERNOON FAVORING THE NORTHERN CWA...BUT GIVEN THE UNCERTAINTY...WILL NOT INCLUDE IN THE CURRENT FORECAST PACKAGE. LONG TERM... UPPER LEVEL HIGH PRESSURE RIDGE WILL DOMINATE THE WEATHER PICTURE FOR THE SOUTHERN PLAINS THROUGH THE EXTENDED. DRY FORECAST RESULTS WITH MIN AND MAX TEMPERATURES HOVERING AROUND CLIM0...HIGHS IN THE MID 90S AND LOWS AROUND 70. && .PRELIMINARY POINT TEMPS/POPS... ABILENE 71 95 70 95 / 10 10 10 10 SAN ANGELO 71 95 72 95 / 10 10 10 10 JUNCTION 72 93 70 94 / 10 10 10 10 && .SJT WATCHES/WARNINGS/ADVISORIES... NONE. && 11
Hazardous weather outlook, Jun 19, 3:13 PM CDT, 11 hours 53 minutes before
HAZARDOUS WEATHER OUTLOOK NATIONAL WEATHER SERVICE SAN ANGELO TX 313 PM CDT TUE JUN 19 2007 TXZ049-054-064>066-071>073-076>078-098-099-113-114-127-128-139- 140-154-155-168>170-202015- 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- 313 PM CDT TUE JUN 19 2007 THIS HAZARDOUS WEATHER OUTLOOK IS FOR PORTIONS OF WEST CENTRAL TEXAS. .DAY ONE...THIS AFTERNOON AND TONIGHT ALTHOUGH A VERY UNSTABLE AIR MASS CONTINUES ACROSS WEST CENTRAL TEXAS THIS AFTERNOON...VERY WARM TEMPERATURES IN THE MID LEVELS OF THE ATMOSPHERE HAS PREVENTED THUNDERSTORM FORMATION ACROSS THE AREA. WITH THIS WARM AIR ALOFT EXPECTED TO HOLD THROUGH THE EVENING...NO HAZARDOUS WEATHER IS EXPECTED AT THIS TIME. .DAYS TWO THROUGH SEVEN...WEDNESDAY THROUGH MONDAY NO HAZARDOUS WEATHER IS EXPECTED AT THIS TIME. .SPOTTER INFORMATION STATEMENT... SPOTTER ACTIVATION WILL NOT BE NEEDED.
In the hours before
Special weather statement, Jun 20, 1:55 AM CDT, 1 hour 11 minutes before
SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE SAN ANGELO TX 155 AM CDT WED JUN 20 2007 TXZ049-054-113-127-200800- NOLAN TX-JONES TX-FISHER TX-TAYLOR TX- 155 AM CDT WED JUN 20 2007 ...SIGNIFICANT WEATHER ALERT EFFECTIVE UNTIL 300 AM CDT FOR NOLAN... JONES...FISHER AND TAYLOR COUNTIES... AT 153 AM CDT...A STRONG THUNDERSTORM WAS INDICATED BY NATIONAL WEATHER SERVICE DOPPLER RADAR 10 MILES NORTHEAST OF ROTAN...OR ABOUT 16 MILES NORTHWEST OF HAMLIN...MOVING SOUTHEAST AT 20 MPH. * THE STRONG THUNDERSTORM WILL BE NEAR... HITSON BY 225 AM CDT MCCAULLEY BY 245 AM CDT SYLVESTER BY 250 AM CDT NEINDA BY 255 AM CDT THE INTERSECTION OF US-180 AND RANCH ROAD 126 BY 300 AM CDT PEA SIZE HAIL AND WIND GUSTS TO 50 MPH ARE LIKELY WITH THIS STORM. HEAVY RAINFALL WILL CAUSE PONDING OF WATER ON AREA ROADWAYS... ESPECIALLY THOSE 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 900 AM CDT WEDNESDAY MORNING FOR WEST CENTRAL TEXAS.
Special weather statement, Jun 20, 2:59 AM CDT, 7 minutes before
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</html>The office that day
Everything else NWS San Angelo, TX issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jun 20, 1:46 AM CDT | Severe Thunderstorm Warning | SJT | Haskell, Throckmorton | 59 min |
| Jun 20, 2:19 AM CDT | Severe Thunderstorm Warning | SJT | Jones, Shackelford | 41 min |
| Jun 20, 2:44 AM CDT | Severe Thunderstorm Warning | SJT | Jones, Shackelford | 46 min |
| Jun 20, 2:46 AM CDT | Severe Thunderstorm Warning | SJT | Haskell, Throckmorton | 44 min |
| Jun 20, 2:54 AM CDT | Severe Thunderstorm Warning | SJT | Callahan, Taylor | 66 min |
| Jun 20, 3:30 AM CDT | Severe Thunderstorm Warning | SJT | Callahan, Shackelford | 60 min |
| Jun 20, 4:18 AM CDT | Severe Thunderstorm Warning | SJT | Brown, Coleman | 42 min |
| Jun 20, 5:18 AM CDT | Severe Thunderstorm Warning | SJT | Concho, Tom Green | 42 min |
| Jun 20, 5:27 AM CDT | Severe Thunderstorm Warning | SJT | Brown, Coleman, McCulloch, San Saba | 63 min |
| Jun 20, 5:30 AM CDT | Severe Thunderstorm Warning | SJT | Crockett, Irion, Menard, Schleicher | 60 min |
| Jun 20, 6:29 AM CDT | Severe Thunderstorm Warning | SJT | Crockett, Schleicher, Sutton | 61 min |
Nearby
Severe Thunderstorm Warnings in Texas, 2007Every severe thunderstorm warning in 2007
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.