Alert archive / Oklahoma / Mesoscale Discussions in 2003
Mesoscale Discussion 501
The Storm Prediction Center issued this mesoscale discussion at Apr 19, 2003, 1:10 PM CDT for 7 counties in Kansas; 24 counties in Oklahoma. It was in force for 2 hr.
The area
The outline as issued.
The facts
- Issued
- Apr 19, 2003, 1:10 PM CDT (18:10 UTC)
- Expired
- Apr 19, 2003, 3:15 PM CDT
- In force
- 2 hr
- Issued by
- the Storm Prediction Center
All 31 counties
Barber County, KS, Comanche County, KS, Harper County, KS, Kingman County, KS, Pratt County, KS, Sedgwick County, KS, Sumner County, KS, Alfalfa County, OK, Blaine County, OK, Canadian County, OK, Cleveland County, OK, Creek County, OK, Dewey County, OK, Garfield County, OK, Grant County, OK, Harper County, OK, Kay County, OK, Kingfisher County, OK, Lincoln County, OK, Logan County, OK, Major County, OK, McClain County, OK, Noble County, OK, Oklahoma County, OK, Osage County, OK, Pawnee County, OK, Payne County, OK, Pottawatomie County, OK, Seminole County, OK, Woods County, OK, Woodward County, OK
The radar
The Vance AFB radar (KVNX), 45 km from the middle of the area, began a volume at 18:11 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 12:00Z, 6.2 hours before the alert went out and 153 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
- 274 J/kg
- Mixed-layer CIN
- -192 J/kg
- Mixed-layer LCL
- 680 m above ground
- 0-6 km bulk shear
- 61 kt
- 0-1 km storm-relative helicity
- 113 m²/s²
- 0-3 km storm-relative helicity
- 395 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 2.5
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 18, 7:33 PM CDT | Mesoscale Discussion | SPC | Atchison, Brown, Doniphan, Jefferson | 57 min |
| Apr 18, 11:08 PM CDT | Mesoscale Discussion | SPC | Butler, Chase, Coffey, Douglas, Franklin, Harvey and 12 more | 2 hr |
| Apr 19, 12:58 AM CDT | Mesoscale Discussion | SPC | Barber, Comanche, Harper, Kingman, Sumner | 2 hr |
| Apr 19, 1:25 AM CDT | Severe Thunderstorm Watch | SPC | Barber, Butler, Chautauqua, Comanche, Cowley, Edwards and 11 more | 7 hr |
| Apr 19, 3:18 AM CDT | Mesoscale Discussion | SPC | Bourbon, Chautauqua, Cherokee, Crawford, Labette, Montgomery and 2 more | 117 min |
| Apr 19, 4:52 AM CDT | Mesoscale Discussion | SPC | Barber, Butler, Comanche, Cowley, Greenwood, Harper and 7 more | 113 min |
| Apr 19, 9:01 AM CDT | Mesoscale Discussion | SPC | Bourbon, Cherokee, Crawford, Labette, Linn | 3 hr |
| Apr 19, 1:15 PM CDT | Tornado Watch | SPC | Barber, Clark, Comanche, Cowley, Harper, Kingman and 2 more | 7 hr |
| Apr 19, 2:30 PM CDT | Tornado Watch | SPC | Butler, Chautauqua, Cherokee, Cowley, Crawford, Elk and 4 more | 7 hr |
| Apr 19, 4:58 PM CDT | Mesoscale Discussion | SPC | Anderson, Chase, Coffey, Douglas, Franklin, Greenwood and 9 more | 92 min |
| Apr 19, 5:25 PM CDT | Severe Thunderstorm Watch | SPC | Anderson, Coffey, Douglas, Franklin, Greenwood, Johnson and 7 more | 6 hr |
| Apr 19, 5:50 PM CDT | Mesoscale Discussion | SPC | Harper, Kingman, Sumner | 85 min |
| Apr 19, 6:07 PM CDT | Mesoscale Discussion | SPC | Chautauqua, Cherokee, Cowley, Crawford, Elk, Labette and 3 more | 83 min |
| Apr 19, 6:55 PM CDT | Severe Thunderstorm Watch | SPC | Bourbon, Cherokee, Crawford | 5 hr |
| Apr 18, 8:31 PM CDT | Mesoscale Discussion | SPC | Caddo, Cleveland, Comanche, Cotton, Grady, Greer and 8 more | 2 hr |
| Apr 18, 9:50 PM CDT | Severe Thunderstorm Watch | SPC | Beckham, Caddo, Canadian, Cleveland, Comanche, Cotton and 13 more | 6 hr |
| Apr 18, 11:32 PM CDT | Mesoscale Discussion | SPC | Beckham, Caddo, Canadian, Cleveland, Comanche, Cotton and 10 more | 118 min |
| Apr 19, 1:20 AM CDT | Tornado Watch | SPC | Comanche, Cotton, Greer, Harmon, Jackson, Kiowa and 2 more | 7 hr |
| Apr 19, 4:11 AM CDT | Mesoscale Discussion | SPC | Comanche, Cotton, Jackson, Kiowa, Stephens, Tillman | 2 hr |
| Apr 19, 2:02 PM CDT | Mesoscale Discussion | SPC | Atoka, Bryan, Choctaw, Cleveland, Coal, Creek and 25 more | 88 min |
| Apr 19, 3:15 PM CDT | Mesoscale Discussion | SPC | Atoka, Bryan, Choctaw, Cleveland, Coal, Creek and 25 more | 2 hr |
Nearby
Mesoscale Discussions in Oklahoma, 2003Mesoscale Discussions in Kansas, 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.