Alert archive / Oklahoma / Mesoscale Discussions in 2003
Mesoscale Discussion 397
The Storm Prediction Center issued this mesoscale discussion at Apr 5, 2003, 11:10 PM CST for 60 counties in Oklahoma. It was in force for 65 min.
The area
The outline as issued.
The facts
- Issued
- Apr 5, 2003, 11:10 PM CST (05:10 UTC)
- Expired
- Apr 6, 2003, 12:15 AM CST
- In force
- 65 min
- Issued by
- the Storm Prediction Center
All 60 counties
Adair County, OK, Alfalfa County, OK, Atoka County, OK, Beckham County, OK, Blaine County, OK, Bryan County, OK, Caddo County, OK, Canadian County, OK, Carter County, OK, Cherokee County, OK, Choctaw County, OK, Cleveland County, OK, Coal County, OK, Comanche County, OK, Cotton County, OK, Creek County, OK, Custer County, OK, Dewey County, OK, Garfield County, OK, Garvin County, OK, Grady County, OK, Greer County, OK, Haskell County, OK, Hughes County, OK, Jackson County, OK, Johnston County, OK, Kingfisher County, OK, Kiowa County, OK, Latimer County, OK, LeFlore County, OK, Lincoln County, OK, Logan County, OK, Major County, OK, Marshall County, OK, Mayes County, OK, McClain County, OK, McCurtain County, OK, McIntosh County, OK, Murray County, OK, Muskogee County, OK, Noble County, OK, Okfuskee County, OK, Oklahoma County, OK, Okmulgee County, OK, Osage County, OK, Pawnee County, OK, Payne County, OK, Pittsburg County, OK, Pontotoc County, OK, Pottawatomie County, OK, Pushmataha County, OK, Rogers County, OK, Seminole County, OK, Sequoyah County, OK, Stephens County, OK, Tulsa County, OK, Wagoner County, OK, Washington County, OK, Washita County, OK, Woods County, OK
The radar
The Norman radar (KTLX), 25 km from the middle of the area, began a volume at 05:12 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, 5.2 hours before the alert went out and 30 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
- 2069 m above ground
- 0-6 km bulk shear
- 63 kt
- 0-1 km storm-relative helicity
- 230 m²/s²
- 0-3 km storm-relative helicity
- 456 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted, in the capitals the NWS used until 2016.
591 ACUS11 KWNS 060510 SWOMCD SPC MCD 060510 ARZ000-OKZ000-TXZ000-060615- MESOSCALE DISCUSSION 0397 NWS STORM PREDICTION CENTER NORMAN OK 1110 PM CST SAT APR 05 2003 AREAS AFFECTED...OK CONCERNING...SEVERE THUNDERSTORM WATCH 95... VALID 060510Z - 060615Z WW 95 OVER WRN AND CENTRAL OK WILL BE REPLACED WITH A NEW WW DURING THE NEXT HOUR. REGIONAL RADARS SHOW TWO ELEVATED SUPERCELLS OVER WRN INTO SWRN OK /ONE OVER CUSTER COUNTY AND THE SECOND OVER NERN COMANCHE/SERN CADDO COUNTIES/. THE SECOND STORM APPEARS TO BE TRACKING EWD ALONG A SURFACE TROUGH...WHICH EXTENDS FROM NWRN TX INTO SWRN OK AT COMANCHE COUNTY AND THEN EWD INTO CENTRAL OK AROUND SRN POTTAWATOMIE COUNTY. AS AN UPPER SHORT WAVE TROUGH/MID-LEVEL SPEED MAX MOVES INTO THE SRN HIGH PLAINS OVERNIGHT...WIND FIELDS/DEEP LAYER SHEAR WILL CONTINUE TO STRENGTHEN OVERNIGHT. INCREASING ELEVATED DESTABILIZATION AS INDICATED BY THE MODELS WILL RESULT IN STORMS CONTINUING TO DEVELOP/INTENSIFY AND SPREAD ENEWD OVER OK. LARGE HAIL WILL BE THE PRIMARY THREAT. ..PETERS.. 04/06/2003 ...PLEASE SEE WWW.SPC.NOAA.GOV FOR GRAPHIC PRODUCT... ATTN...WFO...SHV...TSA...FWD...OUN... 35349983 35909934 36719907 36799818 36749511 35669450 34119447 33709502 34489948
SPC that day
Everything else SPC issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Apr 5, 6:35 PM CST | Mesoscale Discussion | SPC | Love | 115 min |
| Apr 5, 6:40 PM CST | Tornado Watch | SPC | Jackson | 5 hr |
| Apr 5, 6:55 PM CST | Mesoscale Discussion | SPC | Blaine, Caddo, Canadian, Carter, Cleveland, Comanche and 14 more | 95 min |
| Apr 5, 7:10 PM CST | Severe Thunderstorm Watch | SPC | Beckham, Blaine, Caddo, Canadian, Carter, Cleveland and 25 more | 5 hr |
| Apr 5, 8:04 PM CST | Mesoscale Discussion | SPC | Love | 116 min |
| Apr 5, 9:35 PM CST | Tornado Watch | SPC | Love | 5 hr |
| Apr 5, 11:35 PM CST | Severe Thunderstorm Watch | SPC | Atoka, Beckham, Blaine, Caddo, Canadian, Carter and 51 more | 5 hr |
| Apr 6, 5:09 AM CDT | Mesoscale Discussion | SPC | Alfalfa, Atoka, Beckham, Blaine, Caddo, Canadian and 47 more | 96 min |
| Apr 6, 5:35 AM CDT | Severe Thunderstorm Watch | SPC | Atoka, Bryan, Caddo, Canadian, Carter, Cherokee and 46 more | 4 hr |
| Apr 6, 7:45 AM CDT | Mesoscale Discussion | SPC | Atoka, Bryan, Canadian, Carter, Cherokee, Choctaw and 44 more | 2 hr |
| Apr 6, 9:45 AM CDT | Severe Thunderstorm Watch | SPC | Adair, Atoka, Bryan, Carter, Cherokee, Choctaw and 26 more | 5 hr |
| Apr 6, 12:27 PM CDT | Mesoscale Discussion | SPC | Adair, Atoka, Cherokee, Choctaw, Coal, Haskell and 17 more | 2 hr |
| Apr 6, 2:18 PM CDT | Mesoscale Discussion | SPC | Adair, Atoka, Bryan, Choctaw, Haskell, Latimer and 5 more | 57 min |
| Apr 6, 2:55 PM CDT | Severe Thunderstorm Watch | SPC | Choctaw, LeFlore, McCurtain, Pushmataha, Sequoyah | 5 hr |
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.