Alert archive / Texas / Severe Thunderstorm Warnings in 2009
Severe Thunderstorm Warning 209, NWS Amarillo, TX
NWS Amarillo, TX issued this severe thunderstorm warning at Jul 29, 2009, 5:19 PM CDT for Dallam County, Texas; Cimarron County, Oklahoma. It was in force for 56 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
- Jul 29, 2009, 5:19 PM CDT (22:19 UTC)
- Expired
- Jul 29, 2009, 6:15 PM CDT
- In force
- 56 min
- Issued by
- NWS Amarillo, TX
- Area
- Storm-based polygon
Counties Cimarron County, OK, Dallam County, TX
The radar
The Amarillo radar (KAMA), 162 km from the middle of the area, began a volume at 22:21 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 |
|---|---|---|---|
| Jul 29, 1:50 PM CDT | Severe Thunderstorm Watch | SPC | 9 hr |
The nearest sounding before it
Amarillo Airport, TX (KAMA), launched 12:00Z, 10.3 hours before the alert went out and 162 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
- 279 J/kg
- Mixed-layer CIN
- -192 J/kg
- Mixed-layer LCL
- 1394 m above ground
- 0-6 km bulk shear
- 23 kt
- 0-1 km storm-relative helicity
- 25 m²/s²
- 0-3 km storm-relative helicity
- 59 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 Jul 29, 2:57 PM CDT, 2 hours 22 minutes earlier.
Area forecast discussion, Jul 29, 2:57 PM CDT, 2 hours 22 minutes before
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</html>Hazardous weather outlook, Jul 29, 1:57 PM CDT, 3 hours 22 minutes before
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</html>In the hours before
Special weather statement, Jul 29, 3:03 PM CDT, 2 hours 16 minutes before
SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE AMARILLO TX 303 PM CDT WED JUL 29 2009 OKZ001-TXZ001-292030- CIMARRON OK-DALLAM TX- 303 PM CDT WED JUL 29 2009 ...SIGNIFICANT WEATHER ADVISORY... THE NATIONAL WEATHER SERVICE IN AMARILLO HAS ISSUED A SIGNIFICANT WEATHER ADVISORY EFFECTIVE UNTIL 330 PM CDT FOR DALLAM AND CIMARRON COUNTIES. AT 302 PM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A STRONG THUNDERSTORM 12 MILES WEST OF FELT...MOVING SOUTHEAST AT 15 MPH. HAIL...STRONG WINDS...AND VERY HEAVY RAINFALL ARE POSSIBLE WITH THIS STORM. LG
Special weather statement, Jul 29, 5:03 PM CDT, 16 minutes before
SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE AMARILLO TX 503 PM CDT WED JUL 29 2009 OKZ001-TXZ001-292300- CIMARRON OK-DALLAM TX- 503 PM CDT WED JUL 29 2009 ...SIGNIFICANT WEATHER ADVISORY... THE NATIONAL WEATHER SERVICE IN AMARILLO HAS ISSUED A SIGNIFICANT WEATHER ADVISORY EFFECTIVE UNTIL 600 PM CDT FOR DALLAM AND CIMARRON COUNTIES. AT 401 PM MDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A STRONG THUNDERSTORM OVER TEXLINE...MOVING NORTHEAST AT 20 MPH. HAIL...STRONG WINDS...AND VERY HEAVY RAINFALL ARE POSSIBLE WITH THIS STORM. PERSONS IN THE PATH OF THESE STORMS SHOULD CLOSELY MONITOR WEATHER RADIO OR OTHER MEDIA FOR OTHER UPDATES AND POSSIBLE WARNINGS. BE PREPARED TO TAKE ACTION IF A WARNING IS ISSUED.
The office that day
Everything else NWS Amarillo, TX issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jul 28, 7:03 PM CDT | Areal Flood Advisory | AMA | Potter, Randall | 3 hr |
| Jul 28, 7:22 PM CDT | Severe Thunderstorm Warning | AMA | Armstrong, Carson, Potter, Randall | 53 min |
| Jul 28, 7:34 PM CDT | Flash Flood Warning | AMA | Armstrong, Carson, Potter, Randall | 4 hr |
| Jul 28, 7:47 PM CDT | Severe Thunderstorm Warning | AMA | Armstrong, Carson, Donley, Gray, Potter | 58 min |
| Jul 28, 8:09 PM CDT | Severe Thunderstorm Warning | AMA | Armstrong, Carson, Randall | 42 min |
| Jul 28, 8:45 PM CDT | Severe Thunderstorm Warning | AMA | Collingsworth, Donley, Gray, Wheeler | 60 min |
| Jul 28, 10:37 PM CDT | Areal Flood Advisory | AMA | Lipscomb | 3 hr |
| Jul 28, 11:34 PM CDT | Areal Flood Warning | AMA | Randall | 12 hr |
| Jul 29, 4:38 AM CDT | Flash Flood Watch | AMA | Armstrong, Carson, Collingsworth, Dallam, Deaf Smith, Donley and 14 more | 24 hr |
| Jul 29, 6:02 PM CDT | Severe Thunderstorm Warning | AMA | Dallam | 47 min |
| Jul 29, 6:32 PM CDT | Severe Thunderstorm Warning | AMA | Deaf Smith, Hartley, Oldham | 58 min |
| Jul 29, 6:41 PM CDT | Severe Thunderstorm Warning | AMA | Cimarron | 34 min |
Nearby
Severe Thunderstorm Warnings in Texas, 2009Severe Thunderstorm Warnings in Oklahoma, 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.