Alert archive / Oklahoma / Mesoscale Discussions in 2003
Mesoscale Discussion 967
The Storm Prediction Center issued this mesoscale discussion at May 14, 2003, 3:49 AM CDT for 44 counties in Oklahoma; Fannin County, Lamar County, Red River County, Texas. It was in force for 116 min.
The area
The outline as issued.
The facts
- Issued
- May 14, 2003, 3:49 AM CDT (08:49 UTC)
- Expired
- May 14, 2003, 5:45 AM CDT
- In force
- 116 min
- Issued by
- the Storm Prediction Center
All 47 counties
Atoka County, OK, Blaine County, OK, Bryan County, OK, Caddo County, OK, Canadian County, OK, Carter County, OK, Choctaw County, OK, Cleveland County, OK, Coal County, OK, Creek County, OK, Custer County, OK, Dewey County, OK, Ellis County, OK, Garfield County, OK, Garvin County, OK, Grady County, OK, Haskell County, OK, Hughes County, OK, Johnston County, OK, Kingfisher County, OK, Latimer County, OK, Lincoln County, OK, Logan County, OK, Major County, OK, Marshall 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, Pawnee County, OK, Payne County, OK, Pittsburg County, OK, Pontotoc County, OK, Pottawatomie County, OK, Pushmataha County, OK, Seminole County, OK, Stephens County, OK, Tulsa County, OK, Woodward County, OK, Fannin County, TX, Lamar County, TX, Red River County, TX
The radar
The Norman radar (KTLX), 18 km from the middle of the area, began a volume at 08:48 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 00:00Z, 8.8 hours before the alert went out and 33 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
- 3007 J/kg
- Mixed-layer CIN
- -31 J/kg
- Mixed-layer LCL
- 995 m above ground
- 0-6 km bulk shear
- 57 kt
- 0-1 km storm-relative helicity
- 192 m²/s²
- 0-3 km storm-relative helicity
- 283 m²/s²
- Significant tornado parameter
- 4.6
- Supercell composite
- 17.9
The text
As transmitted, in the capitals the NWS used until 2016.
356 ACUS11 KWNS 140849 SWOMCD SPC MCD 140849 TXZ000-OKZ000-141045- MESOSCALE DISCUSSION 0967 NWS STORM PREDICTION CENTER NORMAN OK 0349 AM CDT WED MAY 14 2003 AREAS AFFECTED...OK CONCERNING...SEVERE THUNDERSTORM POTENTIAL 365... VALID 140849Z - 141045Z POTENTIAL FOR LARGE HAIL CONTINUES. DAMAGING WINDS ALSO POSSIBLE IN ADDITION TO LOCALLY EXCESSIVE RAINFALL IN SLOW MOVING/TRAINING CONVECTION. LATEST WATER VAPOR IMAGERY SUGGESTS STRONGER MID/UPPER FORCING FOR UPWARD VERTICAL MOTION CONTINUES TO DEVELOP SOUTHEASTWARD TOWARD CENTRAL OKLAHOMA. CLOUD TOPS ON EVOLVING CONVECTIVE CLUSTER CONTINUE TO COOL/EXPAND. MOST INTENSE ACTIVITY HAS REMAINED NORTH NORTHWEST THROUGH SOUTH OF THE OKLAHOMA CITY AREA...ON NORTHEASTERN PERIPHERY OF MID-LEVEL RIDGE...BUT NEW CONVECTIVE ACTIVITY IS OCCURRING IN ZONE OF LOW/MID-LEVEL ISENTROPIC ASCENT ACROSS MUCH OF NORTHERN/EASTERN OKLAHOMA. CONTINUED EVOLUTION OF LARGE MESOSCALE CONVECTIVE SYSTEM APPEARS LIKELY ACROSS OKLAHOMA THROUGH DAYBREAK. LARGE HAIL APPEARS LIKELY TO REMAIN PRIMARY THREAT WITH ACTIVITY BASED ABOVE LOW-LEVEL INVERSION LAYER...BUT GIVEN WARM MOIST BOUNDARY LAYER...DRY MID-LEVEL ENVIRONMENT WILL CONTRIBUTE TO EVAPORATIVE COOLING IN DOWNDRAFTS. THIS MAY SUPPORT EVOLUTION OF SURFACE COLD POOL/MESO HIGH WITH POTENTIAL FOR STRONG GUSTS ON LEADING EDGE OF OUTFLOW. ..KERR.. 05/14/2003 ...PLEASE SEE WWW.SPC.NOAA.GOV FOR GRAPHIC PRODUCT... ATTN...WFO...SHV...TSA...FWD...OUN...AMA... 36599865 36479645 36169587 35259482 33419462 33419552 33919717 35129882 36860035
SPC that day
Everything else SPC issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| May 13, 9:58 PM CDT | Mesoscale Discussion | SPC | Alfalfa, Blaine, Caddo, Canadian, Cleveland, Custer and 20 more | 3 hr |
| May 13, 10:20 PM CDT | Severe Thunderstorm Watch | SPC | Alfalfa, Atoka, Beckham, Blaine, Caddo, Canadian and 39 more | 7 hr |
| May 14, 1:34 AM CDT | Mesoscale Discussion | SPC | Atoka, Blaine, Caddo, Canadian, Cleveland, Coal and 32 more | 116 min |
| May 14, 4:05 AM CDT | Severe Thunderstorm Watch | SPC | Alfalfa, Blaine, Bryan, Caddo, Canadian, Carter and 23 more | 5 hr |
| May 14, 5:50 AM CDT | Mesoscale Discussion | SPC | Atoka, Blaine, Bryan, Caddo, Canadian, Carter and 23 more | 115 min |
| May 14, 7:40 AM CDT | Mesoscale Discussion | SPC | Beckham, Bryan, Carter, Comanche, Cotton, Custer and 11 more | 95 min |
| May 14, 10:55 AM CDT | Mesoscale Discussion | SPC | Bryan, Choctaw, Johnston, McCurtain, Marshall | 2 hr |
| May 14, 2:30 PM CDT | Tornado Watch | SPC | Choctaw, McCurtain, Pushmataha | 6 hr |
| May 14, 3:23 PM CDT | Mesoscale Discussion | SPC | Cotton, Jefferson, Love, Tillman | 2 hr |
| May 14, 4:52 PM CDT | Mesoscale Discussion | SPC | Alfalfa, Garfield, Grant, Kay, Noble, Payne and 1 more | 113 min |
| May 14, 6:28 PM CDT | Mesoscale Discussion | SPC | Greer, Harmon, Jackson | 2 hr |
| May 13, 8:30 PM CDT | Severe Thunderstorm Watch | SPC | Gregg, Harrison, Marion, Nacogdoches, Panola, Rusk and 2 more | 5 hr |
| May 14, 5:17 PM CDT | Mesoscale Discussion | SPC | Bowie, Cass | 118 min |
Nearby
Mesoscale Discussions in Oklahoma, 2003Mesoscale Discussions in Texas, 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.