Alert archive / Oklahoma / Mesoscale Discussions in 2003
Mesoscale Discussion 955
The Storm Prediction Center issued this mesoscale discussion at May 13, 2003, 10:08 AM CDT for 4 states. It was in force for 97 min.
The area
The outline as issued.
The facts
- Issued
- May 13, 2003, 10:08 AM CDT (15:08 UTC)
- Expired
- May 13, 2003, 11:45 AM CDT
- In force
- 97 min
- Issued by
- the Storm Prediction Center
All 46 counties
Benton County, AR, Allen County, KS, Bourbon County, KS, Butler County, KS, Chautauqua County, KS, Cherokee County, KS, Coffey County, KS, Cowley County, KS, Crawford County, KS, Elk County, KS, Greenwood County, KS, Labette County, KS, Montgomery County, KS, Neosho County, KS, Sedgwick County, KS, Sumner County, KS, Wilson County, KS, Woodson County, KS, Barton County, MO, Jasper County, MO, McDonald County, MO, Newton County, MO, Vernon County, MO, Adair County, OK, Cherokee County, OK, Craig County, OK, Creek County, OK, Delaware County, OK, Grant County, OK, Kay County, OK, Lincoln County, OK, Mayes County, OK, McIntosh County, OK, Muskogee County, OK, Noble County, OK, Nowata County, OK, Okfuskee County, OK, Okmulgee County, OK, Osage County, OK, Ottawa County, OK, Pawnee County, OK, Payne County, OK, Rogers County, OK, Tulsa County, OK, Wagoner County, OK, Washington County, OK
The radar
The Wichita radar (KICT), 115 km from the middle of the area, began a volume at 15:07 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
Norman, OK (KOUN), launched 12:00Z, 3.1 hours before the alert went out and 214 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
- 346 J/kg
- Mixed-layer CIN
- -241 J/kg
- Mixed-layer LCL
- 787 m above ground
- 0-6 km bulk shear
- 35 kt
- 0-1 km storm-relative helicity
- 173 m²/s²
- 0-3 km storm-relative helicity
- 227 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 6.0
The text
As transmitted, in the capitals the NWS used until 2016.
000 ACUS11 KWNS 131509 SWOMCD SPC MCD 131508 ARZ000-MOZ000-OKZ000-KSZ000-131645- MESOSCALE DISCUSSION 0955 NWS STORM PREDICTION CENTER NORMAN OK 1008 AM CDT TUE MAY 13 2003 AREAS AFFECTED...SERN KS / NERN OK / SWRN MO / NWRN AR... CONCERNING...SEVERE THUNDERSTORM POTENTIAL VALID 131508Z - 131645Z ELEVATED THUNDERSTORMS WILL CONTINUE ACROSS SERN KS AND SHOULD MOVE EWD INTO MO OVER THE NEXT FEW HOURS...WHILE ALSO DEVELOPING SWD INTO NERN OK. MARGINALLY-SEVERE HAIL WILL BE THE PRIMARY SEVERE THREAT WITH A FEW OF THE STRONGER STORMS...BUT IT APPEARS ATTM THAT WW WILL NOT BE NECESSARY. LATEST RADAR IMAGERY SHOWS THUNDERSTORMS PERSISTING ACROSS SERN KS ATTM...WITH NEW DEVELOPMENT INDICATED SWD INTO NERN OK. THESE STORMS ARE OCCURRING AHEAD OF APPROACHING UPPER SHORT WAVE TROUGH OVER WRN KS / IN REGION OF LOW-LEVEL WARM ADVECTION NEAR THE NOSE OF 35 KT SWLY LOW-LEVEL JET. ALTHOUGH BOUNDARY-LAYER AIRMASS REMAINS STABLE...500 TO 1500 J/KG ELEVATED CAPE IS INDICATED. THIS COMBINED WITH 35 TO 45 KT WLY MID-LEVEL FLOW SUGGESTS THAT 3/4 TO 1 HAIL WITH A FEW ORGANIZED / ROTATING STORMS SHOULD PERSIST FOR THE NEXT FEW HOURS. ..GOSS.. 05/13/2003 ...PLEASE SEE WWW.SPC.NOAA.GOV FOR GRAPHIC PRODUCT... ATTN...WFO...SGF...EAX...TSA...TOP...ICT...OUN... 37489800 37869763 38329601 37919409 36309379 35229574 35739704 36589775
SPC that day
Everything else SPC issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| May 13, 1:18 PM CDT | Mesoscale Discussion | SPC | Benton, Crawford, Franklin, Johnson, Logan, Madison and 6 more | 87 min |
| May 13, 2:20 PM CDT | Severe Thunderstorm Watch | SPC | Crawford, Franklin, Logan, Madison, Montgomery, Scott and 2 more | 6 hr |
| May 13, 3:33 PM CDT | Mesoscale Discussion | SPC | Crawford, Franklin, Logan, Madison, Scott, Sebastian and 1 more | 87 min |
| May 13, 5:45 PM CDT | Severe Thunderstorm Watch | SPC | Arkansas, Ashley, Bradley, Calhoun, Chicot, Clark and 22 more | 4 hr |
| May 13, 6:18 PM CDT | Mesoscale Discussion | SPC | Arkansas, Ashley, Bradley, Calhoun, Chicot, Clark and 26 more | 87 min |
| May 13, 5:31 AM CDT | Mesoscale Discussion | SPC | Clay, Cloud, Dickinson, Ellsworth, Geary, Jewell and 8 more | 3 hr |
| May 13, 1:53 PM CDT | Mesoscale Discussion | SPC | Harper, Sumner | 97 min |
| May 13, 5:04 PM CDT | Mesoscale Discussion | SPC | Barber, Harper | 86 min |
| May 13, 6:20 PM CDT | Severe Thunderstorm Watch | SPC | Brown, Clay, Cloud, Dickinson, Jewell, Marshall and 6 more | 5 hr |
| May 13, 5:50 AM CDT | Mesoscale Discussion | SPC | Atoka, Bryan, Choctaw, Cleveland, Coal, Garvin and 7 more | 3 hr |
Nearby
Mesoscale Discussions in Oklahoma, 2003Mesoscale Discussions in Kansas, 2003Mesoscale Discussions in Missouri, 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.