Alert archive / Oklahoma / Mesoscale Discussions in 2008
Mesoscale Discussion 651
The Storm Prediction Center issued this mesoscale discussion at Apr 17, 2008, 1:30 PM CDT for 19 counties in Oklahoma; 15 counties in Texas. It was in force for 3 hr.
The area
The outline as issued.
The facts
- Issued
- Apr 17, 2008, 1:30 PM CDT (18:30 UTC)
- Expired
- Apr 17, 2008, 4:00 PM CDT
- In force
- 3 hr
- Issued by
- the Storm Prediction Center
All 34 counties
Atoka County, OK, Bryan County, OK, Carter County, OK, Cleveland County, OK, Coal County, OK, Garvin County, OK, Hughes County, OK, Jefferson County, OK, Johnston County, OK, Lincoln County, OK, Love County, OK, Marshall County, OK, McClain County, OK, Murray County, OK, Okfuskee County, OK, Oklahoma County, OK, Pontotoc County, OK, Pottawatomie County, OK, Seminole County, OK, Collin County, TX, Comanche County, TX, Cooke County, TX, Denton County, TX, Erath County, TX, Grayson County, TX, Hood County, TX, Jack County, TX, Johnson County, TX, Montague County, TX, Palo Pinto County, TX, Parker County, TX, Somervell County, TX, Tarrant County, TX, Wise County, TX
The radar
The Dallas/Ft Worth radar (KFWS), 145 km from the middle of the area, began a volume at 18:28 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
Fort Worth, TX (KFWD), launched 12:00Z, 6.5 hours before the alert went out and 116 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
- 6 J/kg
- Mixed-layer CIN
- -796 J/kg
- Mixed-layer LCL
- 713 m above ground
- 0-6 km bulk shear
- 18 kt
- 0-1 km storm-relative helicity
- 217 m²/s²
- 0-3 km storm-relative helicity
- 421 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 |
|---|---|---|---|---|
| Apr 17, 2:56 PM CDT | Severe Thunderstorm Watch | SPC | Atoka, Bryan, Carter, Cleveland, Coal, Creek and 21 more | 7 hr |
| Apr 17, 4:51 PM CDT | Mesoscale Discussion | SPC | Craig, Delaware, Nowata, Ottawa | 24 min |
| Apr 17, 5:49 PM CDT | Mesoscale Discussion | SPC | Atascosa, Bandera, Bell, Bexar, Blanco, Bosque and 33 more | 56 min |
| Apr 17, 6:38 PM CDT | Severe Thunderstorm Watch | SPC | Bandera, Blanco, Bosque, Brown, Burnet, Coleman and 28 more | 6 hr |
Nearby
Mesoscale Discussions in Oklahoma, 2008Mesoscale Discussions in Texas, 2008Every mesoscale discussion in 2008
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.