Alert archive / Oklahoma / Mesoscale Discussions in 2004
Mesoscale Discussion 516
The Storm Prediction Center issued this mesoscale discussion at Apr 30, 2004, 3:09 PM CDT for 15 counties in Oklahoma. It was in force for 2 hr.
The area
The outline as issued.
The facts
- Issued
- Apr 30, 2004, 3:09 PM CDT (20:09 UTC)
- Expired
- Apr 30, 2004, 5:15 PM CDT
- In force
- 2 hr
- Issued by
- the Storm Prediction Center
Counties Alfalfa County, OK, Blaine County, OK, Caddo County, OK, Canadian County, OK, Comanche County, OK, Custer County, OK, Dewey County, OK, Garfield County, OK, Grady County, OK, Kingfisher County, OK, Kiowa County, OK, Major County, OK, Washita County, OK, Woods County, OK, Woodward County, OK
The radar
The Vance AFB radar (KVNX), 121 km from the middle of the area, began a volume at 20:13 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 nearest sounding before it
Fort Sill, OK (KFSI), launched 12:00Z, 8.2 hours before the alert went out and 121 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
- 0 J/kg
- Mixed-layer CIN
- No buoyant parcel
- Mixed-layer LCL
- 1426 m above ground
- 0-6 km bulk shear
- 39 kt
- 0-1 km storm-relative helicity
- 227 m²/s²
- 0-3 km storm-relative helicity
- 372 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 1.0
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 29, 8:56 PM CDT | Mesoscale Discussion | SPC | Alfalfa, Blaine, Custer, Grant, Jackson, Kiowa and 2 more | 64 min |
| Apr 29, 9:28 PM CDT | Mesoscale Discussion | SPC | Atoka, Bryan, Carter, Choctaw, Coal, Garvin and 17 more | 62 min |
| Apr 29, 10:27 PM CDT | Mesoscale Discussion | SPC | Caddo, Comanche, Cotton, Greer, Harmon, Jackson and 4 more | 63 min |
| Apr 29, 11:05 PM CDT | Severe Thunderstorm Watch | SPC | Beckham, Caddo, Carter, Comanche, Cotton, Custer and 15 more | 4 hr |
| Apr 30, 2:16 AM CDT | Mesoscale Discussion | SPC | Beckham, Caddo, Carter, Comanche, Cotton, Custer and 17 more | 59 min |
| Apr 30, 12:45 PM CDT | Tornado Watch | SPC | Bryan, Carter, Cotton, Jefferson, Love, Marshall | 8 hr |
| Apr 30, 4:10 PM CDT | Mesoscale Discussion | SPC | Adair, Cherokee, Haskell, Hughes, Latimer, LeFlore and 8 more | 2 hr |
| Apr 30, 4:40 PM CDT | Severe Thunderstorm Watch | SPC | Adair, Atoka, Carter, Cherokee, Cleveland, Coal and 23 more | 5 hr |
| Apr 30, 5:53 PM CDT | Mesoscale Discussion | SPC | Bryan, Carter, Cotton, Jefferson, Love, Marshall | 97 min |
Nearby
Mesoscale Discussions in Oklahoma, 2004Every mesoscale discussion in 2004
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.