Alert archive / Kansas / Mesoscale Discussions in 2007
Mesoscale Discussion 851
The Storm Prediction Center issued this mesoscale discussion at May 21, 2007, 3:55 PM CDT for 14 counties in Kansas; Beaver County, Texas County, Oklahoma; 9 counties in Texas. It was in force for 65 min.
The area
The outline as issued.
The facts
- Issued
- May 21, 2007, 3:55 PM CDT (20:55 UTC)
- Expired
- May 21, 2007, 5:00 PM CDT
- In force
- 65 min
- Issued by
- the Storm Prediction Center
All 25 counties
Finney County, KS, Grant County, KS, Gray County, KS, Hamilton County, KS, Haskell County, KS, Kearny County, KS, Lane County, KS, Meade County, KS, Morton County, KS, Scott County, KS, Seward County, KS, Stanton County, KS, Stevens County, KS, Wichita County, KS, Beaver County, OK, Texas County, OK, Carson County, TX, Gray County, TX, Hansford County, TX, Hutchinson County, TX, Moore County, TX, Ochiltree County, TX, Potter County, TX, Roberts County, TX, Sherman County, TX
The radar
The Amarillo radar (KAMA), 161 km from the middle of the area, began a volume at 21:03 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, 8.9 hours before the alert went out and 161 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
- 25 J/kg
- Mixed-layer CIN
- -229 J/kg
- Mixed-layer LCL
- 1252 m above ground
- 0-6 km bulk shear
- 13 kt
- 0-1 km storm-relative helicity
- 9 m²/s²
- 0-3 km storm-relative helicity
- 17 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
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 |
|---|---|---|---|---|
| May 21, 4:06 PM CDT | Severe Thunderstorm Watch | SPC | Clark, Finney, Ford, Grant, Gray, Hamilton and 11 more | 7 hr |
| May 21, 6:03 PM CDT | Mesoscale Discussion | SPC | Barber, Clark, Comanche, Meade | 87 min |
| May 21, 6:35 PM CDT | Severe Thunderstorm Watch | SPC | Alfalfa, Beckham, Blaine, Custer, Dewey, Ellis and 9 more | 6 hr |
| May 21, 2:17 PM CDT | Mesoscale Discussion | SPC | Anderson, Austin, Bell, Bosque, Brazoria, Brazos and 35 more | 58 min |
| May 21, 2:51 PM CDT | Mesoscale Discussion | SPC | Brewster, Crane, Crockett, Ector, Irion, Midland and 9 more | 84 min |
| May 21, 3:17 PM CDT | Severe Thunderstorm Watch | SPC | Brewster, Crane, Crockett, Edwards, Jeff Davis, Kinney and 9 more | 8 hr |
Nearby
Mesoscale Discussions in Kansas, 2007Mesoscale Discussions in Texas, 2007Mesoscale Discussions in Oklahoma, 2007Every mesoscale discussion 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.