Alert archive / Texas / Severe Thunderstorm Warnings in 2009
Severe Thunderstorm Warning 50, NWS Amarillo, TX
NWS Amarillo, TX issued this severe thunderstorm warning at May 12, 2009, 7:17 PM CDT for Armstrong County, Collingsworth County, Donley County, Texas. It was in force for 73 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
- May 12, 2009, 7:17 PM CDT (00:17 UTC)
- Expired
- May 12, 2009, 8:30 PM CDT
- In force
- 73 min
- Issued by
- NWS Amarillo, TX
- Area
- Storm-based polygon
Counties Armstrong County, TX, Collingsworth County, TX, Donley County, TX
The radar
The Amarillo radar (KAMA), 87 km from the middle of the area, began a volume at 00:20 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 |
|---|---|---|---|
| May 12, 5:41 PM CDT | Severe Thunderstorm Watch | SPC | 5 hr |
The nearest sounding before it
Norman, OK (KOUN), launched 00:00Z, 0.3 hours before the alert went out and 312 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
- 1269 J/kg
- Mixed-layer CIN
- -335 J/kg
- Mixed-layer LCL
- 581 m above ground
- 0-6 km bulk shear
- 35 kt
- 0-1 km storm-relative helicity
- 487 m²/s²
- 0-3 km storm-relative helicity
- 684 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 1.8
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 Amarillo, TX wrote its last area forecast discussion before this severe thunderstorm warning went out at May 12, 6:32 PM CDT, 45 minutes earlier.
Area forecast discussion, May 12, 6:32 PM CDT, 45 minutes before
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</html>Hazardous weather outlook, May 12, 1:00 PM CDT, 6 hours 17 minutes before
TEXAS/OKLAHOMA PANHANDLES HAZARDOUS WEATHER OUTLOOK NATIONAL WEATHER SERVICE AMARILLO TX 100 PM CDT TUE MAY 12 2009 OKZ001>003-TXZ001>020-131100- ARMSTRONG-BEAVER-CARSON-CIMARRON-COLLINGSWORTH-DALLAM-DEAF SMITH- DONLEY-GRAY-HANSFORD-HARTLEY-HEMPHILL-HUTCHINSON-LIPSCOMB-MOORE- OCHILTREE-OLDHAM-POTTER-RANDALL-ROBERTS-SHERMAN-TEXAS-WHEELER- 100 PM CDT TUE MAY 12 2009 THIS HAZARDOUS WEATHER OUTLOOK IS FOR THE TEXAS AND OKLAHOMA PANHANDLES. .DAY ONE... THERE IS A SLIGHT CHANCE OF THUNDERSTORMS IN THE EASTERN HALF OF THE TEXAS AND OKLAHOMA PANHANDLES THIS AFTERNOON AND THIS EVENING AS A DRY LINE PUSHES EAST ACROSS THE AREA. SOME OF THESE STORMS MAY BE SEVERE WITH LARGE HAIL AND DAMAGING WINDS BEING THE MAIN THREATS. IN ADDITION...SOUTH WINDS OF 20 TO 30 MPH WILL BE POSSIBLE THIS AFTERNOON AND THIS EVENING. THEREFORE...BOATERS SHOULD EXERCISE CAUTION ON AREA LAKES THROUGH THIS EVENING. ALONG WITH THE WINDY CONDITIONS...MINIMUM RELATIVE HUMIDITY VALUES WILL DROP BELOW 15 PERCENT OVER THE NORTHWEST TEXAS PANHANDLE AND WESTERN OKLAHOMA PANHANDLE...RESULTING IN CRITICAL FIRE WEATHER CONDITIONS. A RED FLAG WARNING IS IN EFFECT FOR THESE LOCATIONS UNTIL 7 PM CDT. .DAYS TWO THROUGH SEVEN... THUNDERSTORMS WILL BE POSSIBLE ACROSS THE FAR EASTERN PANHANDLES WEDNESDAY NIGHT...AND ACROSS ALL OF THE PANHANDLES FRIDAY NIGHT THROUGH SATURDAY NIGHT. WIDESPREAD SEVERE WEATHER IS NOT ANTICIPATED ON THESE DAYS. .SPOTTER INFORMATION STATEMENT... SPOTTER GROUPS AND EMERGENCY MANAGERS ACROSS THE EASTERN PORTIONS OF THE PANHANDLES SHOULD MONITOR THE LATEST FORECASTS FOR POSSIBLE ACTIVATION THIS AFTERNOON AND EVENING. NUNEZ
In the hours before
Special weather statement, May 12, 6:15 PM CDT, 1 hour 2 minutes before
SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE AMARILLO TX 615 PM CDT TUE MAY 12 2009 TXZ017-018-122345- RANDALL TX-ARMSTRONG TX- 615 PM CDT TUE MAY 12 2009 ...STRONG THUNDERSTORM ACROSS ARMSTRONG AND RANDALL COUNTIES... AT 615 PM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A STRONG THUNDERSTORM 19 MILES WEST OF WAYSIDE...OR ABOUT 19 MILES SOUTH OF CANYON...MOVING NORTHEAST AT 20 MPH. UP TO ONE HALF INCH SIZE HAIL AND WINDS AROUND 50 MPH ARE POSSIBLE. CLK
Local storm report, May 12, 6:26 PM CDT, 51 minutes before
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</html>Local storm report, May 12, 6:37 PM CDT, 40 minutes before
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</html>The office that day
Everything else NWS Amarillo, TX issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| May 12, 7:53 PM CDT | Severe Thunderstorm Warning | AMA | Collingsworth, Donley, Gray, Wheeler | 58 min |
Nearby
Severe Thunderstorm Warnings in Texas, 2009Every severe thunderstorm warning in 2009
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.