Alert archive / Oklahoma / Mesoscale Discussions in 2007
Mesoscale Discussion 852
The Storm Prediction Center issued this mesoscale discussion at May 21, 2007, 6:03 PM CDT for 4 counties in Kansas; 8 counties in Oklahoma; 4 counties in Texas. It was in force for 87 min.
The area
The outline as issued.
The facts
- Issued
- May 21, 2007, 6:03 PM CDT (23:03 UTC)
- Expired
- May 21, 2007, 7:30 PM CDT
- In force
- 87 min
- Issued by
- the Storm Prediction Center
Counties Barber County, KS, Clark County, KS, Comanche County, KS, Meade County, KS, Beaver County, OK, Dewey County, OK, Ellis County, OK, Harper County, OK, Major County, OK, Roger Mills County, OK, Woods County, OK, Woodward County, OK, Hemphill County, TX, Lipscomb County, TX, Ochiltree County, TX, Roberts County, TX
The radar
The Dodge City radar (KDDC), 160 km from the middle of the area, began a volume at 23:03 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, 11.1 hours before the alert went out and 178 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, 3:55 PM CDT | Mesoscale Discussion | SPC | Finney, Grant, Gray, Hamilton, Haskell, Kearny and 8 more | 65 min |
| May 21, 4:06 PM CDT | Severe Thunderstorm Watch | SPC | Clark, Finney, Ford, Grant, Gray, Hamilton and 11 more | 7 hr |
| 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 Oklahoma, 2007Mesoscale Discussions in Kansas, 2007Mesoscale Discussions in Texas, 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.