Alert archive / Texas / Mesoscale Discussions in 2012
Mesoscale Discussion 867
The Storm Prediction Center issued this mesoscale discussion at May 22, 2012, 1:06 PM MDT for 5 states. It was in force for 84 min.
The area
The outline as issued.
The facts
- Issued
- May 22, 2012, 1:06 PM MDT (19:06 UTC)
- Expired
- May 22, 2012, 2:30 PM MDT
- In force
- 84 min
- Issued by
- the Storm Prediction Center
- Chance of a watch
- 20%
Counties Baca County, CO, Grant County, KS, Morton County, KS, Seward County, KS, Stanton County, KS, Stevens County, KS, Harding County, NM, Union County, NM, Beaver County, OK, Cimarron County, OK, Texas County, OK, Dallam County, TX, Hansford County, TX, Hartley County, TX, Hutchinson County, TX, Moore County, TX, Ochiltree County, TX, Oldham County, TX, Roberts County, TX, Sherman County, TX
The radar
The Amarillo radar (KAMA), 165 km from the middle of the area, began a volume at 19:09 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
Amarillo Airport, TX (KAMA), launched 12:00Z, 7.1 hours before the alert went out and 165 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
- 1865 m above ground
- 0-6 km bulk shear
- 24 kt
- 0-1 km storm-relative helicity
- 28 m²/s²
- 0-3 km storm-relative helicity
- 171 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted, in the capitals the NWS used until 2016.
682
ACUS11 KWNS 221907
SWOMCD
SPC MCD 221906
TXZ000-OKZ000-KSZ000-COZ000-NMZ000-222030-
MESOSCALE DISCUSSION 0867
NWS STORM PREDICTION CENTER NORMAN OK
0206 PM CDT TUE MAY 22 2012
AREAS AFFECTED...SERN CO...SWRN KS...OK/TX PANHANDLES...NERN NM
CONCERNING...SEVERE POTENTIAL...WATCH UNLIKELY
VALID 221906Z - 222030Z
PROBABILITY OF WATCH ISSUANCE...20 PERCENT
SUMMARY...THUNDERSTORM DEVELOPMENT IS POSSIBLE OVER SERN CO...NERN
NM AND THE WRN TX/OK PANHANDLES DURING THE NEXT FEW HRS. THIS
ACTIVITY IS THEN FORECAST TO SPREAD E-SEWD ACROSS THE REMAINDER OF
THE OK PANHANDLE...NRN TX PANHANDLE...AND PORTIONS OF SWRN KS.
ISOLATED LARGE HAIL AND DAMAGING WIND GUSTS WILL BE POSSIBLE. WW IS
UNLIKELY.
DISCUSSION...STRONG SURFACE HEATING IS OCCURRING OVER NERN NM INTO
SERN CO...WITH TEMPERATURES AT 19Z NEAR 90F. THIS IS AIDING IN THE
DEVELOPMENT OF A DEEPLY MIXED BOUNDARY LAYER AND SUBSEQUENT
DEEPENING OF HIGH BASED CUMULUS. AS THE HIGH BASED CU ENCOUNTERS
SLIGHTLY GREATER MOISTURE /LOW TO MID 50S DEWPOINTS/ OVER THE TX/OK
PANHANDLES AND SWRN KS...SCATTERED THUNDERSTORM COVERAGE IS
EXPECTED...AS DEPICTED IN 16Z HRRR. RAP FORECAST SOUNDINGS SHOW
STORMS WILL OCCUR IN AN ENVIRONMENT CHARACTERIZED BY STEEP LOW AND
MIDLEVEL LAPSE RATES...MLCAPE VALUES FROM 1000-2000 J/KG...AND
STRONGLY VEERING DEEP-LAYER WIND PROFILES. THIS MAY FAVOR ISOLATED
LARGE HAIL AND DAMAGING WIND GUSTS ACROSS THE AREA.
..GARNER/WEISS.. 05/22/2012
...PLEASE SEE WWW.SPC.NOAA.GOV FOR GRAPHIC PRODUCT...
ATTN...WFO...DDC...AMA...PUB...ABQ...
LAT...LON 35840428 37070416 37890313 37860168 37280041 36610019
35740087 35170304 35840428SPC that day
Everything else SPC issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| May 21, 6:40 PM MDT | Mesoscale Discussion | SPC | Curry, Quay | 95 min |
| May 21, 8:33 PM MDT | Mesoscale Discussion | SPC | Bailey, Castro, Cochran, Hale, Hockley, Lamb and 3 more | 87 min |
| May 22, 4:10 PM MDT | Mesoscale Discussion | SPC | Brewster | 65 min |
Nearby
Mesoscale Discussions in Texas, 2012Mesoscale Discussions in Kansas, 2012Mesoscale Discussions in Oklahoma, 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.