Alert archive / Oklahoma / Mesoscale Discussions in 2003
Mesoscale Discussion 1802
The Storm Prediction Center issued this mesoscale discussion at Jul 12, 2003, 10:12 PM CDT for 21 counties in Oklahoma. It was in force for 2 hr.
The area
The outline as issued.
The facts
- Issued
- Jul 12, 2003, 10:12 PM CDT (03:12 UTC)
- Expired
- Jul 13, 2003, 12:15 AM CDT
- In force
- 2 hr
- Issued by
- the Storm Prediction Center
All 21 counties
Cherokee County, OK, Creek County, OK, Garfield County, OK, Grant County, OK, Kay County, OK, Lincoln County, OK, Logan County, OK, Major County, OK, Mayes County, OK, McIntosh County, OK, Muskogee County, OK, Noble County, OK, Okfuskee County, OK, Okmulgee County, OK, Osage County, OK, Pawnee County, OK, Payne County, OK, Rogers County, OK, Tulsa County, OK, Wagoner County, OK, Washington County, OK
The radar
The Tulsa radar (KINX), 97 km from the middle of the area, began a volume at 03:16 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, 3.2 hours before the alert went out and 128 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
- 3350 J/kg
- Mixed-layer CIN
- -45 J/kg
- Mixed-layer LCL
- 1897 m above ground
- 0-6 km bulk shear
- 36 kt
- 0-1 km storm-relative helicity
- 97 m²/s²
- 0-3 km storm-relative helicity
- 355 m²/s²
- Significant tornado parameter
- 0.6
- Supercell composite
- 33.1
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 |
|---|---|---|---|---|
| Jul 12, 11:25 PM CDT | Severe Thunderstorm Watch | SPC | Alfalfa, Blaine, Caddo, Canadian, Cleveland, Comanche and 29 more | 6 hr |
| Jul 13, 2:35 AM CDT | Mesoscale Discussion | SPC | Alfalfa, Blaine, Caddo, Canadian, Cleveland, Comanche and 28 more | 115 min |
| Jul 13, 4:11 AM CDT | Mesoscale Discussion | SPC | Alfalfa, Blaine, Caddo, Canadian, Cleveland, Coal and 29 more | 64 min |
| Jul 13, 2:56 PM CDT | Mesoscale Discussion | SPC | Alfalfa, Blaine, Canadian, Garfield, Grant, Kingfisher and 2 more | 94 min |
Nearby
Mesoscale Discussions in Oklahoma, 2003Every mesoscale discussion in 2003
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.