Alert archive / Oklahoma / Mesoscale Discussions in 2007
Mesoscale Discussion 1799
The Storm Prediction Center issued this mesoscale discussion at Aug 19, 2007, 1:46 AM CDT for 21 counties in Oklahoma. It was in force for 59 min.
The area
The outline as issued.
The facts
- Issued
- Aug 19, 2007, 1:46 AM CDT (06:46 UTC)
- Expired
- Aug 19, 2007, 2:45 AM CDT
- In force
- 59 min
- Issued by
- the Storm Prediction Center
All 21 counties
Blaine County, OK, Caddo County, OK, Canadian County, OK, Carter County, OK, Cleveland County, OK, Comanche County, OK, Cotton County, OK, Garfield County, OK, Garvin County, OK, Grady County, OK, Jefferson County, OK, Kingfisher County, OK, Lincoln County, OK, Logan County, OK, Major County, OK, McClain County, OK, Murray County, OK, Oklahoma County, OK, Payne County, OK, Pottawatomie County, OK, Stephens County, OK
The radar
The Norman radar (KTLX), 67 km from the middle of the area, began a volume at 06:46 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
Norman, OK (KOUN), launched 00:00Z, 6.8 hours before the alert went out and 53 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
- 1581 J/kg
- Mixed-layer CIN
- -10 J/kg
- Mixed-layer LCL
- 650 m above ground
- 0-6 km bulk shear
- 30 kt
- 0-1 km storm-relative helicity
- 121 m²/s²
- 0-3 km storm-relative helicity
- 200 m²/s²
- Significant tornado parameter
- 0.8
- Supercell composite
- 4.7
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 |
|---|---|---|---|---|
| Aug 18, 11:36 PM CDT | Mesoscale Discussion | SPC | Blaine, Caddo, Canadian, Comanche, Custer, Grady and 3 more | 3 hr |
| Aug 19, 2:51 AM CDT | Tornado Watch | SPC | Blaine, Canadian, Cleveland, Comanche, Cotton, Garvin and 10 more | 5 hr |
| Aug 19, 7:27 AM CDT | Mesoscale Discussion | SPC | Canadian, Carter, Cleveland, Garvin, Grady, Jefferson and 9 more | 63 min |
| Aug 19, 1:58 PM CDT | Mesoscale Discussion | SPC | Adair, Cherokee, Craig, Delaware, Haskell, McIntosh and 7 more | 3 hr |
Nearby
Mesoscale 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.