Alert archive / Texas / Mesoscale Discussions in 2012
Mesoscale Discussion 598
The Storm Prediction Center issued this mesoscale discussion at Apr 26, 2012, 5:31 PM MDT for 4 states. It was in force for 119 min.
The area
The outline as issued.
The facts
- Issued
- Apr 26, 2012, 5:31 PM MDT (23:31 UTC)
- Expired
- Apr 26, 2012, 7:30 PM MDT
- In force
- 119 min
- Issued by
- the Storm Prediction Center
All 46 counties
Baca County, CO, Bent County, CO, Kiowa County, CO, Otero County, CO, Prowers County, CO, Grant County, KS, Greeley County, KS, Hamilton County, KS, Haskell County, KS, Kearny County, KS, Meade County, KS, Morton County, KS, Seward County, KS, Stanton County, KS, Stevens County, KS, Wichita County, KS, Beaver County, OK, Cimarron County, OK, Texas County, OK, Armstrong County, TX, Briscoe County, TX, Carson County, TX, Castro County, TX, Childress County, TX, Collingsworth County, TX, Dallam County, TX, Deaf Smith County, TX, Donley County, TX, Floyd County, TX, Gray County, TX, Hale County, TX, Hall County, TX, Hansford County, TX, Hartley County, TX, Hemphill County, TX, Hutchinson County, TX, Lipscomb County, TX, Moore County, TX, Ochiltree County, TX, Oldham County, TX, Potter County, TX, Randall County, TX, Roberts County, TX, Sherman County, TX, Swisher County, TX, Wheeler County, TX
The radar
The Amarillo radar (KAMA), 145 km from the middle of the area, began a volume at 23:35 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
Amarillo Airport, TX (KAMA), launched 12:00Z, 11.5 hours before the alert went out and 146 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
- 1226 J/kg
- Mixed-layer CIN
- -201 J/kg
- Mixed-layer LCL
- 1742 m above ground
- 0-6 km bulk shear
- 33 kt
- 0-1 km storm-relative helicity
- 62 m²/s²
- 0-3 km storm-relative helicity
- 64 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 1.0
The text
As transmitted, in the capitals the NWS used until 2016.
933
ACUS11 KWNS 262332
SWOMCD
SPC MCD 262331
KSZ000-TXZ000-OKZ000-COZ000-NMZ000-270130-
MESOSCALE DISCUSSION 0598
NWS STORM PREDICTION CENTER NORMAN OK
0631 PM CDT THU APR 26 2012
AREAS AFFECTED...OK/TX PANHANDLES...WRN KS...SERN CO
CONCERNING...SEVERE THUNDERSTORM WATCH 192...
VALID 262331Z - 270130Z
THE SEVERE WEATHER THREAT FOR SEVERE THUNDERSTORM WATCH 192
CONTINUES.
A SEVERE WIND AND HAIL THREAT PERSISTS ACROSS MAINLY THE ERN HALF OF
WW 192. SOME SEVERE THREAT MAY CONTINUE OVER PORTIONS OF THE ERN
TX/OK PANHANDLES AS WELL...REQUIRING AN AREAL WATCH EXTENSION.
A LARGE CLUSTER OF CELLS WITH INTERMINGLED OUTFLOWS CONTINUES OVER
THE CNTRL TX PANHANDLE...MOVING IN A ENEWD DIRECTION. THIS IS ALL S
OF THE PRIMARY SURFACE BOUNDARY WITH A TIGHT THETA-E GRADIENT ACROSS
N CNTRL OK INTO WRN KS. WITH WARM AND MOIST AIR E OF THIS
CLUSTER...AND FAVORABLE DEEP LAYER SHEAR...A FEW CELLS MAY CONTINUE
INTO THE ERN TX PANHANDLE.
OTHER MORE ISOLATED CELLS WERE NOTED FROM THE OK PANHANDLE INTO SERN
CO AND SWRN KS. THESE CELLS ARE ON THE EDGE OF THE BETTER MOISTURE
AND MAY DWINDLE ONCE THEY INTERACT WITH RELATIVELY COOLER AND DRIER
AIR CURRENTLY OVER SWRN KS.
AS UPPER FORCING WITH THE SHORTWAVE TROUGH COMES OUT THIS
EVENING...AN ADDITIONAL ROUND OF CONVECTION IS EXPECTED FROM CO INTO
WRN KS AND PERHAPS AS FAR S AS THE PANHANDLES.
..JEWELL.. 04/26/2012
...PLEASE SEE WWW.SPC.NOAA.GOV FOR GRAPHIC PRODUCT...
ATTN...WFO...DDC...GLD...LUB...AMA...PUB...BOU...ABQ...
LAT...LON 37000003 35170002 34520012 34110087 33970169 34710274
36340305 37910374 38390350 38720276 38700171 38480111
37000003SPC that day
Everything else SPC issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Apr 26, 1:53 PM MDT | Mesoscale Discussion | SPC | Baca, Bent | 67 min |
| Apr 26, 2:42 PM MDT | Severe Thunderstorm Watch | SPC | Baca, Bent, Crowley, Kiowa, Las Animas, Otero and 1 more | 6 hr |
| Apr 26, 2:47 PM MDT | Mesoscale Discussion | SPC | Adams, Arapahoe, Logan, Morgan, Washington, Weld | 58 min |
Nearby
Mesoscale Discussions in Texas, 2012Mesoscale Discussions in Kansas, 2012Mesoscale Discussions in Colorado, 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.