Alert archive / Texas / Mesoscale Discussions in 2012
Mesoscale Discussion 1012
The Storm Prediction Center issued this mesoscale discussion at Jun 1, 2012, 3:52 PM CDT for 4 states. It was in force for 53 min.
The area
The outline as issued.
The facts
- Issued
- Jun 1, 2012, 3:52 PM CDT (20:52 UTC)
- Expired
- Jun 1, 2012, 4:45 PM CDT
- In force
- 53 min
- Issued by
- the Storm Prediction Center
All 40 counties
Grant County, KS, Gray County, KS, Haskell County, KS, Meade County, KS, Morton County, KS, Seward County, KS, Stevens County, KS, Colfax County, NM, Curry County, NM, Harding County, NM, Mora County, NM, Quay County, NM, San Miguel County, NM, Union County, NM, Beaver County, OK, Beckham County, OK, Cimarron County, OK, Ellis County, OK, Roger Mills County, OK, Texas County, OK, Armstrong County, TX, Carson County, TX, Collingsworth County, TX, Dallam County, TX, Deaf Smith County, TX, Donley County, TX, Gray 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, Wheeler County, TX
The radar
The Amarillo radar (KAMA), 107 km from the middle of the area, began a volume at 20:54 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, 8.9 hours before the alert went out and 107 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
- 1343 m above ground
- 0-6 km bulk shear
- 33 kt
- 0-1 km storm-relative helicity
- 301 m²/s²
- 0-3 km storm-relative helicity
- 446 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 3.0
The text
As transmitted, in the capitals the NWS used until 2016.
587
ACUS11 KWNS 012053
SWOMCD
SPC MCD 012052
OKZ000-KSZ000-TXZ000-NMZ000-012145-
MESOSCALE DISCUSSION 1012
NWS STORM PREDICTION CENTER NORMAN OK
0352 PM CDT FRI JUN 01 2012
AREAS AFFECTED...PORTIONS OF SWRN KS...NERN NM...WRN OK...THE TX
PANHANDLE
CONCERNING...SEVERE THUNDERSTORM WATCH 335...
VALID 012052Z - 012145Z
THE SEVERE WEATHER THREAT FOR SEVERE THUNDERSTORM WATCH 335
CONTINUES.
SUMMARY...STORMS CONTINUE DEVELOPING ACROSS NRN PARTS OF WW
335...AND THE THREAT FOR SVR WIND/HAIL IS INCREASING.
DISCUSSION...CONVECTION CONTINUES TO DEVELOP/INTENSIFY NEAR AND SE
OF A SFC TROUGH/WIND-SHIFT AXIS ARCING FROM WRN KS INTO THE WRN OK
PANHANDLE AND FAR NERN NM. ADDITIONAL STORMS MAY EVOLVE FROM
TOWERING CUMULUS ONGOING ACROSS THE SANGRE DE CRISTO MOUNTAINS.
MODIFICATIONS TO 12Z AMARILLO RAOB TO ACCOUNT FOR CURRENT SFC OBS
SUGGEST MLCAPE VALUES OF 1000-2000 J/KG ACROSS A LARGE PART OF THE
WW AREA. WHILE INSTABILITY IS PRESENTLY RELATIVELY LESS OVER PARTS
OF W-CNTRL AND SWRN OK INVOF COOLER SFC TEMPERATURES COINCIDING WITH
REMNANT BILLOW CLOUDS PER VISIBLE SATELLITE IMAGERY...DIABATIC
HEATING WEST OF A MORE WIDESPREAD CLOUD SHIELD MAY BOOST INSTABILITY
ACROSS PARTS OF WRN OK LATER THIS AFTERNOON. GIVEN THE
AFOREMENTIONED MAGNITUDE OF MLCAPE...AND 700-500-MB LAPSE RATES OF
7-8.5 C/KM COMBINED WITH 35-45 KT OF EFFECTIVE BULK SHEAR ASSOCIATED
WITH MODERATE MID-LEVEL NWLY FLOW...SVR HAIL -- SOME POSSIBLY
SIGNIFICANT WITH PERSISTENT SUPERCELL STRUCTURES -- AND SVR WIND ARE
ANTICIPATED. AS STORMS TRACK SEWD/SSEWD INTO LATE AFTERNOON AND
EARLY EVENING...UPSCALE GROWTH INTO ONE OR MORE CONVECTIVE COMPLEXES
MAY OCCUR WITH MERGING COLD POOLS. SHOULD THIS OCCUR...THE SVR WIND
THREAT WOULD INCREASE.
..COHEN.. 06/01/2012
...PLEASE SEE WWW.SPC.NOAA.GOV FOR GRAPHIC PRODUCT...
ATTN...WFO...OUN...DDC...LUB...AMA...ABQ...
LAT...LON 34750299 34550329 34630378 35080408 35260463 35340551
36110533 36890497 36940307 36950204 37470171 37700143
37700102 37690066 37790040 37460012 36559997 35909946
35199944 34789998 34800165 34750299SPC that day
Everything else SPC issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jun 1, 1:53 PM CDT | Mesoscale Discussion | SPC | Grant, Haskell, Morton, Seward, Stanton, Stevens | 97 min |
| Jun 1, 2:22 PM CDT | Severe Thunderstorm Watch | SPC | Grant, Gray, Haskell, Meade, Morton, Seward and 2 more | 8 hr |
| Jun 1, 6:03 PM CDT | Mesoscale Discussion | SPC | Beckham, Custer, Dewey, Ellis, Greer, Harmon and 7 more | 117 min |
| Jun 1, 6:22 PM CDT | Severe Thunderstorm Watch | SPC | Jackson | 6 hr |
Nearby
Mesoscale Discussions in Texas, 2012Mesoscale Discussions in Kansas, 2012Mesoscale Discussions in New Mexico, 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.