Alert archive / Kansas / Mesoscale Discussions in 2011
Mesoscale Discussion 121
The Storm Prediction Center issued this mesoscale discussion at Feb 23, 2011, 8:43 PM CST for 10 counties in Kansas; 6 counties in Missouri; 7 counties in Oklahoma. It was in force for 62 min.
The area
The outline as issued.
The facts
- Issued
- Feb 23, 2011, 8:43 PM CST (02:43 UTC)
- Expired
- Feb 23, 2011, 9:45 PM CST
- In force
- 62 min
- Issued by
- the Storm Prediction Center
All 23 counties
Allen County, KS, Bourbon County, KS, Chautauqua County, KS, Cherokee County, KS, Crawford County, KS, Labette County, KS, Linn County, KS, Montgomery County, KS, Neosho County, KS, Wilson County, KS, Barton County, MO, Cedar County, MO, Dade County, MO, Jasper County, MO, Newton County, MO, Vernon County, MO, Craig County, OK, Nowata County, OK, Osage County, OK, Ottawa County, OK, Pawnee County, OK, Rogers County, OK, Washington County, OK
The radar
The Tulsa radar (KINX), 115 km from the middle of the area, began a volume at 02:47 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
Springfield, MO (KSGF), launched 00:00Z, 2.7 hours before the alert went out and 119 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
- 1240 m above ground
- 0-6 km bulk shear
- 65 kt
- 0-1 km storm-relative helicity
- 310 m²/s²
- 0-3 km storm-relative helicity
- 310 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted, in the capitals the NWS used until 2016.
247
ACUS11 KWNS 240244
SWOMCD
SPC MCD 240243
MOZ000-OKZ000-KSZ000-240345-
MESOSCALE DISCUSSION 0121
NWS STORM PREDICTION CENTER NORMAN OK
0843 PM CST WED FEB 23 2011
AREAS AFFECTED...NERN OK...SWRN MO...SERN KS
CONCERNING...SEVERE POTENTIAL...WATCH UNLIKELY
VALID 240243Z - 240345Z
RETRANSMISSION FOR AWIPS.
SCATTERED THUNDERSTORMS...SOME POSSIBLY STRONG...WILL CONTINUE TO
DEVELOP AND MOVE E-NEWD ACROSS PORTIONS OF NERN OK AND SERN KS INTO
SWRN MO THROUGH MID-EVENING. A WW WILL NOT BE NEEDED.
A SLOWLY MOVING COLD FRONT WILL CONTINUE TO CROSS PORTIONS OF SERN
KS AND NERN OK THROUGH MID EVENING. A ZONE OF ELEVATED INSTABILITY
/MUCAPE VALUES AOA 500 J/KG PER 00Z RUC ANALYSIS/ WILL CONTINUE TO
COMBINE WITH FRONTAL CONVERGENCE TO SUPPORT CONVECTIVE INITIATION
ALONG AND IMMEDIATELY AHEAD OF THE FRONT. THE CONVECTION IS FORECAST
TO BEGIN TO SPREAD INTO SWRN MO AFTER 02Z. EFFECTIVE BULK WIND SHEAR
MAGNITUDES OF 50-55 KT WILL PROMOTE MARGINAL STORM ORGANIZATION AND
THE THREAT FOR STRONG STORMS. AN ISOLATED SEVERE THUNDERSTORM
CAPABLE OF PRODUCING LARGE HAIL CANNOT BE ENTIRELY RULED OUT.
HOWEVER...THE LACK OF GREATER INSTABILITY OR STRONGER DEEP-LAYER
FORCING WILL PRECLUDE A MORE ROBUST CONVECTIVE THREAT...AND A WW
WILL NOT BE NEEDED.
..COHEN.. 02/24/2011
...PLEASE SEE WWW.SPC.NOAA.GOV FOR GRAPHIC PRODUCT...
ATTN...WFO...SGF...EAX...TSA...TOP...ICT...OUN...
LAT...LON 38019368 37259372 36719457 36379542 36169647 36469707
37059648 38229485 38019368SPC that day
Everything else SPC issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Feb 24, 11:13 AM CST | Mesoscale Discussion | SPC | Atchison, Brown, Clay, Doniphan, Douglas, Geary and 12 more | 6 hr |
| Feb 24, 2:34 PM CST | Tornado Watch | SPC | Dunklin, Pemiscot | 7 hr |
| Feb 24, 5:20 PM CST | Mesoscale Discussion | SPC | Adair, Audrain, Chariton, Clark, Knox, Lewis and 12 more | 6 hr |
| Feb 24, 5:26 PM CST | Mesoscale Discussion | SPC | Dunklin, Mississippi, New Madrid, Pemiscot | 94 min |
| Feb 24, 5:54 PM CST | Tornado Watch | SPC | Mississippi, New Madrid | 4 hr |
| Feb 24, 3:07 AM CST | Mesoscale Discussion | SPC | Alfalfa, Beckham, Blaine, Caddo, Canadian, Custer and 17 more | 113 min |
| Feb 24, 4:10 AM CST | Severe Thunderstorm Watch | SPC | Beckham, Caddo, Canadian, Carter, Cleveland, Comanche and 17 more | 7 hr |
| Feb 24, 7:47 AM CST | Mesoscale Discussion | SPC | Cleveland, Cotton, Garvin, Grady, Jefferson, McClain and 3 more | 118 min |
| Feb 24, 10:34 AM CST | Mesoscale Discussion | SPC | Choctaw, Haskell, Latimer, LeFlore, McCurtain, Pushmataha | 56 min |
| Feb 24, 11:25 AM CST | Tornado Watch | SPC | Adair, Choctaw, Haskell, Latimer, LeFlore, McCurtain and 3 more | 9 hr |
| Feb 24, 2:39 PM CST | Mesoscale Discussion | SPC | Haskell, Latimer, LeFlore, McCurtain, Muskogee, Sequoyah | 66 min |
Nearby
Mesoscale Discussions in Kansas, 2011Mesoscale Discussions in Oklahoma, 2011Mesoscale Discussions in Missouri, 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.