Alert archive / Texas / Severe Thunderstorm Warnings in 2009
Severe Thunderstorm Warning 17, NWS Amarillo, TX
NWS Amarillo, TX issued this severe thunderstorm warning at Apr 17, 2009, 6:28 PM CDT for Hemphill County, Texas. It was in force for 49 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 17, 2009, 6:28 PM CDT (23:28 UTC)
- Expired
- Apr 17, 2009, 7:17 PM CDT
- In force
- 49 min
- Issued by
- NWS Amarillo, TX
- Area
- Storm-based polygon
County Hemphill County, TX
The radar
The Amarillo radar (KAMA), 147 km from the middle of the area, began a volume at 23:31 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 17, 5:00 PM CDT | Severe Thunderstorm Watch | SPC | 5 hr |
The nearest sounding before it
Dodge City, (KDDC), launched 12:00Z, 11.5 hours before the alert went out and 217 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
- 0 J/kg
- Mixed-layer CIN
- No buoyant parcel
- Mixed-layer LCL
- 592 m above ground
- 0-6 km bulk shear
- 31 kt
- 0-1 km storm-relative helicity
- 318 m²/s²
- 0-3 km storm-relative helicity
- 317 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 Amarillo, TX wrote its last area forecast discussion before this severe thunderstorm warning went out at Apr 17, 6:24 PM CDT, 4 minutes earlier.
Area forecast discussion, Apr 17, 6:24 PM CDT, 4 minutes before
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</html>Hazardous weather outlook, Apr 17, 5:12 PM CDT, 1 hour 16 minutes before
TEXAS/OKLAHOMA PANHANDLES HAZARDOUS WEATHER OUTLOOK...UPDATED NATIONAL WEATHER SERVICE AMARILLO TX 512 PM CDT FRI APR 17 2009 OKZ001>003-TXZ001>020-180300- ARMSTRONG-BEAVER-CARSON-CIMARRON-COLLINGSWORTH-DALLAM-DEAF SMITH- DONLEY-GRAY-HANSFORD-HARTLEY-HEMPHILL-HUTCHINSON-LIPSCOMB-MOORE- OCHILTREE-OLDHAM-POTTER-RANDALL-ROBERTS-SHERMAN-TEXAS-WHEELER- 512 PM CDT FRI APR 17 2009 THIS HAZARDOUS WEATHER OUTLOOK IS FOR THE TEXAS AND OKLAHOMA PANHANDLES. .DAY ONE... ...A SEVERE THUNDERSTORM WATCH IS IN EFFECT FOR THE CENTRAL AND EASTERN OKLAHOMA PANHANDLE AND THE EASTERN TEXAS PANHANDLE UNTIL 10 PM... THUNDERSTORMS ARE POSSIBLE ACROSS MOST OF THE TEXAS AND OKLAHOMA PANHANDLES THROUGH TONIGHT AS A LARGE AND SLOW MOVING UPPER LEVEL LOW PRESSURE SYSTEM CONTINUES TO AFFECT THE SOUTHERN ROCKIES AND ADJACENT HIGH PLAINS. SOME STORMS MAY BECOME SEVERE ACROSS THE OKLAHOMA PANHANDLE AND THE EASTERN TEXAS PANHANDLE...WITH LARGE HAIL AND DAMAGING WINDS THE PRIMARY THREATS. IN ADDITION...LOCATIONS IN THE CENTRAL TEXAS PANHANDLE THAT RECEIVED HEAVY RAIN ON THURSDAY COULD BE SUSCEPTIBLE TO FLOODING TODAY. ANY ADDITIONAL RAIN WILL QUICKLY BECOME RUNOFF AND COULD RESULT IN FLASH FLOODING OR FLOODING. .DAYS TWO THROUGH SEVEN... AS THE UPPER LEVEL LOW PRESSURE SYSTEM CONTINUES TO MOVE SLOWLY EAST...THUNDERSTORMS WILL AGAIN BE POSSIBLE SATURDAY ACROSS THE NORTHERN TEXAS PANHANDLE AND THE OKLAHOMA PANHANDLE. ANY STORMS THAT FORM ARE EXPECTED TO REMAIN BELOW SEVERE LEVELS AT THIS TIME. .SPOTTER INFORMATION STATEMENT... SPOTTER GROUPS AND EMERGENCY MANAGEMENT OFFICIALS ACROSS THE OKLAHOMA PANHANDLE AS WELL AS THE EASTERN TEXAS PANHANDLE SHOULD REMAIN ALERT AND BE READY FOR POSSIBLE ACTIVATION THIS AFTERNOON AND TONIGHT. ANDRADE
In the hours before
Special weather statement, Apr 17, 5:35 PM CDT, 53 minutes before
SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE AMARILLO TX 535 PM CDT FRI APR 17 2009 TXZ015-020-172300- COLLINGSWORTH TX-WHEELER TX- 535 PM CDT FRI APR 17 2009 ...STRONG THUNDERSTORM IN CENTRAL COLLINGSWORTH AND SOUTH CENTRAL WHEELER COUNTIES... AT 535 PM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A STRONG THUNDERSTORM 3 MILES EAST OF LUTIE MOVING NORTH AT 25 MPH. UP TO ONE HALF INCH SIZE HAIL IS POSSIBLE WITH THIS STRONG THUNDERSTORM. PEOPLE IN CENTRAL COLLINGSWORTH AND SOUTH CENTRAL WHEELER COUNTIES... INCLUDING THE CITY OF SHAMROCK...SHOULD MONITOR THE WEATHER SITUATION CLOSELY...LISTEN FOR WARNINGS AND REMAIN ALERT FOR THREATENING WEATHER CONDITIONS. BEAL
Special weather statement, Apr 17, 5:44 PM CDT, 44 minutes before
SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE AMARILLO TX 544 PM CDT FRI APR 17 2009 TXZ010-015-172315- HEMPHILL TX-WHEELER TX- 544 PM CDT FRI APR 17 2009 ...STRONG THUNDERSTORM IN SOUTH CENTRAL HEMPHILL AND CENTRAL WHEELER COUNTIES... AT 544 PM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A STRONG THUNDERSTORM 4 MILES NORTHWEST OF TWITTY MOVING NORTH AT 30 MPH. UP TO ONE HALF INCH SIZE HAIL IS POSSIBLE WITH THIS STRONG THUNDERSTORM. PEOPLE IN SOUTH CENTRAL HEMPHILL AND CENTRAL WHEELER COUNTIES SHOULD MONITOR THE WEATHER SITUATION CLOSELY...LISTEN FOR WARNINGS AND REMAIN ALERT FOR THREATENING WEATHER CONDITIONS. BEAL
Local storm report, Apr 17, 5:57 PM CDT, 31 minutes before
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</html>Local storm report, Apr 17, 6:04 PM CDT, 24 minutes before
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</html>Special weather statement, Apr 17, 6:23 PM CDT, 5 minutes before
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</html>Local storm report, Apr 17, 6:26 PM CDT, 2 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 |
|---|---|---|---|---|
| Apr 16, 7:24 PM CDT | Severe Thunderstorm Warning | AMA | Armstrong | 33 min |
| Apr 16, 9:52 PM CDT | Areal Flood Advisory | AMA | Potter, Randall | 5 hr |
| Apr 16, 10:54 PM CDT | Areal Flood Advisory | AMA | Hutchinson | 4 hr |
| Apr 16, 10:59 PM CDT | Flash Flood Warning | AMA | Potter, Randall | 3 hr |
| Apr 17, 2:17 AM CDT | Areal Flood Advisory | AMA | Armstrong | 4 hr |
| Apr 17, 5:59 PM CDT | Severe Thunderstorm Warning | AMA | Collingsworth, Wheeler | 33 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.