Alert archive / Oklahoma / Mesoscale Discussions in 2003
Mesoscale Discussion 71
The Storm Prediction Center issued this mesoscale discussion at Feb 14, 2003, 11:09 PM CST for 4 states. It was in force for 2 hr.
The area
The outline as issued.
The facts
- Issued
- Feb 14, 2003, 11:09 PM CST (05:09 UTC)
- Expired
- Feb 15, 2003, 1:15 AM CST
- In force
- 2 hr
- Issued by
- the Storm Prediction Center
All 39 counties
Benton County, AR, Carroll County, AR, Crawford County, AR, Franklin County, AR, Madison County, AR, Sebastian County, AR, Washington County, AR, Cherokee County, KS, Labette County, KS, Barry County, MO, Jasper County, MO, Lawrence County, MO, McDonald County, MO, Newton County, MO, Stone County, MO, Adair County, OK, Cherokee County, OK, Craig County, OK, Creek County, OK, Delaware County, OK, Haskell County, OK, Hughes County, OK, Latimer County, OK, LeFlore County, OK, Lincoln County, OK, Mayes County, OK, McIntosh County, OK, Muskogee County, OK, Nowata County, OK, Okfuskee County, OK, Okmulgee County, OK, Ottawa County, OK, Pittsburg County, OK, Rogers County, OK, Seminole County, OK, Sequoyah County, OK, Tulsa County, OK, Wagoner County, OK, Washington County, OK
The radar
The Tulsa radar (KINX), 12 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
Springfield, MO (KSGF), launched 00:00Z, 5.2 hours before the alert went out and 167 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
- 484 J/kg
- Mixed-layer CIN
- -127 J/kg
- Mixed-layer LCL
- 637 m above ground
- 0-6 km bulk shear
- 41 kt
- 0-1 km storm-relative helicity
- 241 m²/s²
- 0-3 km storm-relative helicity
- 284 m²/s²
- Significant tornado parameter
- 0.2
- Supercell composite
- 1.1
The text
As transmitted, in the capitals the NWS used until 2016.
424 ACUS11 KWNS 150509 SWOMCD SPC MCD 150509 OKZ000-KSZ000-MOZ000-ARZ000-150715- MESOSCALE DISCUSSION 0071 NWS STORM PREDICTION CENTER NORMAN OK 1109 PM CST FRI FEB 14 2003 AREAS AFFECTED...CNTRL / NERN OK INTO SERN KS...SWRN MO AND NWRN AR CONCERNING...SEVERE THUNDERSTORM POTENTIAL VALID 150509Z - 150715Z TSTM DEVELOPMENT IS EXPECTED TO CONTINUE INVOF COLD FRONT FROM CNTRL OK INTO SWRN MO. WW MAY BE REQUIRED SOON. TLX RADAR IMAGERY SHOWS TSTMS DEVELOPING ALONG/IMMEDIATELY BEHIND COLD FRONT THAT EXTENDS FROM SURFACE LOW OVER FAR SERN KS SWWD THROUGH OKC INTO NWRN TX. LOW LEVEL FRONTAL CONVERGENCE AND LARGE SCALE ASCENT ASSOCIATED WITH SHORTWAVE CURRENTLY MOVING NEWD ACROSS CNTRL OK ARE LIKELY CONTRIBUTING TO THE CONVECTIVE DEVELOPMENT. AIRMASS AHEAD OF FRONT REMAINS SLIGHTLY UNSTABLE WITH MUCAPES OF 1000-1500 J/KG. LOW WET BULB ZERO HEIGHTS --AOB 8000FT-- AND SUFFICIENT SHEAR THROUGH THE BUOYANCY LAYER WILL SUPPORT LARGE HAIL. ..MEAD/GOSS.. 02/15/2003 ...PLEASE SEE WWW.SPC.NOAA.GOV FOR GRAPHIC PRODUCT... 35899705 36279666 36639632 36879603 37059569 37119558 37219531 37399477 37149384 36799338 36319334 35859354 35159413 34639514 34529602 34839689 35589700
SPC that day
Everything else SPC issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Feb 14, 6:57 PM CST | Mesoscale Discussion | SPC | Little River | 2 hr |
| Feb 14, 7:37 PM CST | Mesoscale Discussion | SPC | Little River | 113 min |
| Feb 14, 11:20 PM CST | Severe Thunderstorm Watch | SPC | Benton, Carroll, Crawford, Franklin, Madison, Sebastian and 1 more | 6 hr |
| Feb 15, 12:31 AM CST | Mesoscale Discussion | SPC | Benton, Carroll, Crawford, Franklin, Madison, Sebastian and 1 more | 119 min |
| Feb 15, 3:15 AM CST | Mesoscale Discussion | SPC | Benton, Carroll, Crawford, Madison, Sebastian, Washington | 60 min |
| Feb 14, 8:26 PM CST | Mesoscale Discussion | SPC | Allen, Anderson, Bourbon, Chautauqua, Cherokee, Coffey and 13 more | 2 hr |
Nearby
Mesoscale Discussions in Oklahoma, 2003Mesoscale Discussions in Arkansas, 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.