Alert archive / Oklahoma / Mesoscale Discussions in 2011
Mesoscale Discussion 248
The Storm Prediction Center issued this mesoscale discussion at Mar 22, 2011, 3:20 PM CDT for Chautauqua County, Cowley County, Sumner County, Kansas; 16 counties in Oklahoma. It was in force for 85 min.
The area
The outline as issued.
The facts
- Issued
- Mar 22, 2011, 3:20 PM CDT (20:20 UTC)
- Expired
- Mar 22, 2011, 4:45 PM CDT
- In force
- 85 min
- Issued by
- the Storm Prediction Center
Counties Chautauqua County, KS, Cowley County, KS, Sumner County, KS, Canadian County, OK, Cleveland County, OK, Creek County, OK, Garvin County, OK, Grady County, OK, Kay County, OK, Lincoln County, OK, Logan County, OK, McClain County, OK, Noble County, OK, Oklahoma County, OK, Osage County, OK, Pawnee County, OK, Payne County, OK, Pottawatomie County, OK, Washington County, OK
The radar
The Norman radar (KTLX), 89 km from the middle of the area, began a volume at 20:20 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
Lamont, OK (KLMN), launched 12:00Z, 8.3 hours before the alert went out and 63 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
- 37 J/kg
- Mixed-layer CIN
- -640 J/kg
- Mixed-layer LCL
- 1009 m above ground
- 0-6 km bulk shear
- 37 kt
- 0-1 km storm-relative helicity
- 484 m²/s²
- 0-3 km storm-relative helicity
- 484 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted, in the capitals the NWS used until 2016.
328
ACUS11 KWNS 222021
SWOMCD
SPC MCD 222020
KSZ000-OKZ000-222145-
MESOSCALE DISCUSSION 0248
NWS STORM PREDICTION CENTER NORMAN OK
0320 PM CDT TUE MAR 22 2011
AREAS AFFECTED...CNTRL AND NRN OK...SE KS
CONCERNING...SEVERE POTENTIAL...WATCH POSSIBLE
VALID 222020Z - 222145Z
AN ISOLATED SEVERE THREAT MAY DEVELOP FROM SCNTRL OK NNEWD INTO SE
KS LATE THIS AFTERNOON. IF STORMS CAN INITIATE...LARGE HAIL AND FEW
DAMAGING WIND GUSTS WILL BE POSSIBLE AND A WW MAY BECOME NECESSARY.
LATEST SFC ANALYSIS SHOWS A DRYLINE WHICH IS ADVANCING QUICKLY EWD
ACROSS WCNTRL OK AND CNTRL KS. AHEAD OF THE DRYLINE...SBCAPE VALUES
ARE ESTIMATED FROM 1200 TO 1800 J/KG BUT THE AIRMASS REMAINS CAPPED.
FORECAST SOUNDINGS WEAKEN THE CAP LATE THIS AFTERNOON WHICH COMBINED
WITH CONVERGENCE ALONG THE DRYLINE MAY RESULT IN STORM INITIATION.
HOWEVER...LARGE-SCALE ASCENT SHOULD REMAIN WEAK AND THE CONVECTIVE
THREAT REMAINS CONDITIONAL. IF A FEW STORMS CAN INITIATE...STRONG
DEEP LAYER SHEAR ASSOCIATED WITH THE RIGHT SIDE OF AN 70 TO 85 KT
MID-LEVEL JET WILL PROVIDE SUPPORT FOR SEVERE STORMS. SUPERCELLS MAY
DEVELOP ESPECIALLY IF AN UPDRAFT CAN MATURE IN SPITE OF THE WEAK
FORCING. STEEP MID-LEVEL LAPSE RATES SHOULD RESULT IN A THREAT FOR
LARGE HAIL AND ISOLATED WIND DAMAGE MAY ALSO OCCUR WITH ANY STORM
THAT CAN BECOME SUSTAINED.
..BROYLES.. 03/22/2011
...PLEASE SEE WWW.SPC.NOAA.GOV FOR GRAPHIC PRODUCT...
ATTN...WFO...TSA...ICT...OUN...
LAT...LON 36329591 35079668 34709716 34629758 34629804 34869822
35149814 36239781 37059759 37329750 37509735 37549699
37489630 37159590 36329591SPC that day
Everything else SPC issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Mar 22, 1:19 PM CDT | Mesoscale Discussion | SPC | Allen, Anderson, Atchison, Brown, Chase, Clay and 30 more | 116 min |
| Mar 22, 2:03 PM CDT | Tornado Watch | SPC | Allen, Anderson, Atchison, Brown, Butler, Chase and 27 more | 7 hr |
Nearby
Mesoscale Discussions in Oklahoma, 2011Mesoscale Discussions in Kansas, 2011Every mesoscale discussion in 2011
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.