Alert archive / Oklahoma / Mesoscale Discussions in 2003
Mesoscale Discussion 850
The Storm Prediction Center issued this mesoscale discussion at May 8, 2003, 12:49 PM CDT for Harper County, Sumner County, Kansas; 7 counties in Oklahoma. It was in force for 3 hr.
The area
The outline as issued.
The facts
- Issued
- May 8, 2003, 12:49 PM CDT (17:49 UTC)
- Expired
- May 8, 2003, 3:45 PM CDT
- In force
- 3 hr
- Issued by
- the Storm Prediction Center
Counties Harper County, KS, Sumner County, KS, Alfalfa County, OK, Blaine County, OK, Garfield County, OK, Grant County, OK, Kingfisher County, OK, Kiowa County, OK, Washita County, OK
The radar
The Vance AFB radar (KVNX), 77 km from the middle of the area, began a volume at 17:48 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, 5.8 hours before the alert went out and 129 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
- 2594 J/kg
- Mixed-layer CIN
- -55 J/kg
- Mixed-layer LCL
- 646 m above ground
- 0-6 km bulk shear
- 55 kt
- 0-1 km storm-relative helicity
- 164 m²/s²
- 0-3 km storm-relative helicity
- 213 m²/s²
- Significant tornado parameter
- 3.1
- Supercell composite
- 11.0
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 |
|---|---|---|---|---|
| May 7, 7:01 PM CDT | Mesoscale Discussion | SPC | Cheyenne, Greeley, Sherman, Wallace, Wichita | 89 min |
| May 8, 1:18 AM CDT | Mesoscale Discussion | SPC | Allen, Barber, Barton, Bourbon, Butler, Chautauqua and 21 more | 3 hr |
| May 8, 1:55 AM CDT | Severe Thunderstorm Watch | SPC | Allen, Anderson, Barber, Barton, Bourbon, Butler and 44 more | 5 hr |
| May 8, 3:51 AM CDT | Mesoscale Discussion | SPC | Atchison, Barber, Barton, Bourbon, Brown, Butler and 50 more | 3 hr |
| May 8, 4:15 AM CDT | Severe Thunderstorm Watch | SPC | Atchison, Brown, Clay, Cloud, Doniphan, Douglas and 19 more | 7 hr |
| May 8, 7:50 AM CDT | Mesoscale Discussion | SPC | Atchison, Brown, Doniphan, Jackson, Jefferson, Leavenworth and 6 more | 85 min |
| May 8, 7:55 AM CDT | Mesoscale Discussion | SPC | Atchison, Brown, Doniphan, Jackson, Jefferson, Leavenworth and 6 more | 95 min |
| May 8, 1:07 PM CDT | Mesoscale Discussion | SPC | Barton, Clay, Cloud, Dickinson, Ellis, Ellsworth and 16 more | 2 hr |
| May 8, 1:10 PM CDT | Mesoscale Discussion | SPC | Cheyenne, Decatur, Graham, Norton, Rawlins, Sheridan and 2 more | 2 hr |
| May 8, 1:30 PM CDT | Tornado Watch | SPC | Cheyenne, Decatur, Gove, Graham, Logan, Norton and 6 more | 6 hr |
| May 8, 1:35 PM CDT | Tornado Watch | SPC | Butler, Chautauqua, Cowley, Elk, Greenwood, Harper and 5 more | 7 hr |
| May 8, 1:50 PM CDT | Tornado Watch | SPC | Anderson, Atchison, Brown, Chase, Clay, Cloud and 31 more | 7 hr |
| May 8, 3:26 PM CDT | Mesoscale Discussion | SPC | Brown, Clay, Cloud, Dickinson, Ellsworth, Geary and 22 more | 2 hr |
| May 8, 3:34 PM CDT | Mesoscale Discussion | SPC | Butler, Chase, Chautauqua, Coffey, Cowley, Elk and 10 more | 116 min |
| May 8, 3:35 PM CDT | Mesoscale Discussion | SPC | Cheyenne, Decatur, Gove, Graham, Logan, Norton and 6 more | 115 min |
| May 8, 4:16 PM CDT | Mesoscale Discussion | SPC | Allen, Anderson, Atchison, Bourbon, Cherokee, Crawford and 11 more | 29 min |
| May 8, 4:40 PM CDT | Tornado Watch | SPC | Allen, Anderson, Atchison, Bourbon, Cherokee, Crawford and 13 more | 6 hr |
| May 8, 6:38 PM CDT | Mesoscale Discussion | SPC | Allen, Anderson, Atchison, Bourbon, Brown, Butler and 46 more | 2 hr |
| May 7, 8:01 PM CDT | Mesoscale Discussion | SPC | Beckham, Caddo, Comanche, Cotton, Greer, Harmon and 4 more | 59 min |
| May 7, 10:35 PM CDT | Mesoscale Discussion | SPC | Alfalfa, Blaine, Caddo, Canadian, Cherokee, Cleveland and 29 more | 55 min |
| May 7, 10:35 PM CDT | Tornado Watch | SPC | Beckham, Bryan, Carter, Coal, Comanche, Cotton and 13 more | 5 hr |
| May 7, 10:55 PM CDT | Severe Thunderstorm Watch | SPC | Adair, Alfalfa, Beckham, Blaine, Caddo, Canadian and 39 more | 5 hr |
| May 7, 11:51 PM CDT | Mesoscale Discussion | SPC | Beckham, Bryan, Carter, Coal, Comanche, Cotton and 13 more | 54 min |
| May 8, 1:57 AM CDT | Mesoscale Discussion | SPC | Atoka, Beckham, Bryan, Carter, Coal, Comanche and 14 more | 2 hr |
| May 8, 3:50 AM CDT | Severe Thunderstorm Watch | SPC | Adair, Atoka, Bryan, Cherokee, Choctaw, Coal and 25 more | 3 hr |
| May 8, 5:02 AM CDT | Mesoscale Discussion | SPC | Adair, Atoka, Cherokee, Choctaw, Coal, Creek and 24 more | 2 hr |
| May 8, 6:20 AM CDT | Tornado Watch | SPC | Haskell, Latimer, LeFlore, Sequoyah | 3 hr |
| May 8, 4:47 PM CDT | Mesoscale Discussion | SPC | Canadian, Cleveland, Grady, Lincoln, Logan, McClain and 3 more | 58 min |
| May 8, 5:31 PM CDT | Mesoscale Discussion | SPC | Adair, Cherokee, Coal, Craig, Creek, Delaware and 17 more | 59 min |
| May 8, 5:45 PM CDT | Tornado Watch | SPC | Adair, Cherokee, Coal, Craig, Delaware, Haskell and 17 more | 5 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.