Alert archive / Texas / Mesoscale Discussions in 2009
Mesoscale Discussion 482
The Storm Prediction Center issued this mesoscale discussion at Apr 16, 2009, 1:41 PM CDT for Cimarron County, Texas County, Oklahoma; 24 counties in Texas. It was in force for 64 min.
The area
The outline as issued.
The facts
- Issued
- Apr 16, 2009, 1:41 PM CDT (18:41 UTC)
- Expired
- Apr 16, 2009, 2:45 PM CDT
- In force
- 64 min
- Issued by
- the Storm Prediction Center
All 26 counties
Cimarron County, OK, Texas County, OK, Armstrong County, TX, Briscoe County, TX, Carson County, TX, Crosby County, TX, Dickens County, TX, Donley County, TX, Floyd County, TX, Garza County, TX, Gray County, TX, Hale County, TX, Hall County, TX, Hansford County, TX, Hutchinson County, TX, Kent County, TX, Lubbock County, TX, Lynn County, TX, Moore County, TX, Motley County, TX, Ochiltree County, TX, Potter County, TX, Randall County, TX, Roberts County, TX, Sherman County, TX, Swisher County, TX
The radar
The Amarillo radar (KAMA), 58 km from the middle of the area, began a volume at 18:41 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 watches that followed
Watches SPC issued over any of the same counties within four hours of this discussion.
The nearest sounding before it
Amarillo Airport, TX (KAMA), launched 12:00Z, 6.7 hours before the alert went out and 57 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
- 525 J/kg
- Mixed-layer CIN
- -282 J/kg
- Mixed-layer LCL
- 678 m above ground
- 0-6 km bulk shear
- 39 kt
- 0-1 km storm-relative helicity
- 320 m²/s²
- 0-3 km storm-relative helicity
- 252 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.7
The text
As transmitted, in the capitals the NWS used until 2016.
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</html>SPC that day
Everything else SPC issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Apr 16, 11:20 AM CDT | Mesoscale Discussion | SPC | Beaver, Beckham, Caddo, Comanche, Cotton, Custer and 13 more | 115 min |
| Apr 16, 2:42 PM CDT | Severe Thunderstorm Watch | SPC | Beaver, Cimarron, Texas | 7 hr |
| Apr 16, 5:56 PM CDT | Mesoscale Discussion | SPC | Harmon | 94 min |
| Apr 16, 6:33 PM CDT | Mesoscale Discussion | SPC | Beaver, Cimarron, Texas | 87 min |
| Apr 16, 3:53 PM CDT | Mesoscale Discussion | SPC | Borden, Briscoe, Crosby, Dawson, Dickens, Fisher and 11 more | 67 min |
| Apr 16, 4:42 PM CDT | Tornado Watch | SPC | Andrews, Borden, Briscoe, Castro, Childress, Coke and 34 more | 7 hr |
Nearby
Mesoscale Discussions in Texas, 2009Mesoscale Discussions in Oklahoma, 2009Every mesoscale discussion 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.