Alert archive / Oklahoma / Mesoscale Discussions in 2012
Mesoscale Discussion 901
The Storm Prediction Center issued this mesoscale discussion at May 25, 2012, 8:43 PM CDT for 10 counties in Kansas; 13 counties in Oklahoma; 6 counties in Texas. It was in force for 62 min.
The area
The outline as issued.
The facts
- Issued
- May 25, 2012, 8:43 PM CDT (01:43 UTC)
- Expired
- May 25, 2012, 9:45 PM CDT
- In force
- 62 min
- Issued by
- the Storm Prediction Center
All 29 counties
Barber County, KS, Clark County, KS, Comanche County, KS, Edwards County, KS, Ford County, KS, Kingman County, KS, Kiowa County, KS, Meade County, KS, Pratt County, KS, Reno County, KS, Beaver County, OK, Beckham County, OK, Custer County, OK, Dewey County, OK, Ellis County, OK, Greer County, OK, Harmon County, OK, Harper County, OK, Major County, OK, Roger Mills County, OK, Washita County, OK, Woods County, OK, Woodward County, OK, Collingsworth County, TX, Donley County, TX, Gray County, TX, Hemphill County, TX, Lipscomb County, TX, Wheeler County, TX
The radar
The Vance AFB radar (KVNX), 125 km from the middle of the area, began a volume at 01:42 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 00:00Z, 1.7 hours before the alert went out and 170 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
- 2987 J/kg
- Mixed-layer CIN
- -143 J/kg
- Mixed-layer LCL
- 1326 m above ground
- 0-6 km bulk shear
- 33 kt
- 0-1 km storm-relative helicity
- 85 m²/s²
- 0-3 km storm-relative helicity
- 197 m²/s²
- Significant tornado parameter
- 0.3
- Supercell composite
- 2.9
The text
As transmitted, in the capitals the NWS used until 2016.
265
ACUS11 KWNS 260143
SWOMCD
SPC MCD 260143
KSZ000-OKZ000-TXZ000-260245-
MESOSCALE DISCUSSION 0901
NWS STORM PREDICTION CENTER NORMAN OK
0843 PM CDT FRI MAY 25 2012
AREAS AFFECTED...ERN TX PANHANDLE...WRN OK...S-CNTRL KS
CONCERNING...SEVERE THUNDERSTORM WATCH 299...
VALID 260143Z - 260245Z
THE SEVERE WEATHER THREAT FOR SEVERE THUNDERSTORM WATCH 299
CONTINUES.
SUMMARY...CLUSTER OF TSTMS ACROSS W-CNTRL OK AND THE FAR NE TX
PANHANDLE WILL CONTINUE MOVING NWD WITH AN ENHANCED WIND THREAT OVER
THE NEXT FEW HOURS.
DISCUSSION...CLUSTER OF TSTMS ACROSS W-CNTRL OK AND THE FAR NE TX
PANHANDLE WILL CONTINUE PROGRESSING NWD WHILE WEAKENING OVER THE
NEXT FEW HOURS. WANING INSTABILITY ASSOCIATED WITH THE LOSS OF
DAYTIME HEATING... LARGE SFC DEWPOINT DEPRESSIONS...AND DCAPE VALUES
AOA 1500 J/KG SUGGEST THE PRIMARY SEVERE THREAT HAS TRANSITIONED
FROM HAIL TO WIND. OK MESONET OBSERVATION SITE AT ARNETT RECENTLY
REPORTED A 72 MPH WIND GUST. STRONG WIND GUSTS WILL LIKELY CONTINUE
EVEN AS REFLECTIVITY DECREASES WITH A POTENTIAL FOR ISOLATED HEAT
BURSTS OVER PORTIONS OF NW OK/S-CNTRL KS.
..MOSIER.. 05/26/2012
...PLEASE SEE WWW.SPC.NOAA.GOV FOR GRAPHIC PRODUCT...
ATTN...WFO...ICT...OUN...DDC...LUB...AMA...
LAT...LON 34749913 34639982 34880103 37770022 38139797 37749803
35919868 34749913SPC that day
Everything else SPC issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| May 25, 8:29 PM CDT | Mesoscale Discussion | SPC | Barton, Ellis, Ellsworth, Lincoln, Mitchell, Ness and 5 more | 2 hr |
| May 25, 9:17 PM CDT | Mesoscale Discussion | SPC | Phillips, Smith | 88 min |
| May 25, 10:44 PM CDT | Mesoscale Discussion | SPC | Barton, Ellsworth, Lincoln, Pawnee, Rush, Russell | 61 min |
| May 26, 2:46 PM CDT | Mesoscale Discussion | SPC | Finney, Grant, Gray, Hamilton, Haskell, Kearny and 5 more | 119 min |
| May 26, 3:24 PM CDT | Severe Thunderstorm Watch | SPC | Andrews, Bailey, Brewster, Castro, Cochran, Crane and 24 more | 7 hr |
Nearby
Mesoscale Discussions in Oklahoma, 2012Mesoscale Discussions in Kansas, 2012Mesoscale Discussions in Texas, 2012Every mesoscale discussion in 2012
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.