Alert archive / Texas / Mesoscale Discussions in 2012
Mesoscale Discussion 862
The Storm Prediction Center issued this mesoscale discussion at May 21, 2012, 6:40 PM MDT for Curry County, Quay County, New Mexico; 9 counties in Texas. It was in force for 95 min.
The area
The outline as issued.
The facts
- Issued
- May 21, 2012, 6:40 PM MDT (00:40 UTC)
- Expired
- May 21, 2012, 8:15 PM MDT
- In force
- 95 min
- Issued by
- the Storm Prediction Center
Counties Curry County, NM, Quay County, NM, Bailey County, TX, Castro County, TX, Deaf Smith County, TX, Hartley County, TX, Lamb County, TX, Oldham County, TX, Parmer County, TX, Randall County, TX, Swisher County, TX
The radar
The Cannon AFB radar (KFDX), 92 km from the middle of the area, began a volume at 00:41 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 00:00Z, 0.7 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
- 118 J/kg
- Mixed-layer CIN
- -79 J/kg
- Mixed-layer LCL
- 2075 m above ground
- 0-6 km bulk shear
- 41 kt
- 0-1 km storm-relative helicity
- 24 m²/s²
- 0-3 km storm-relative helicity
- 231 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.1
The text
As transmitted, in the capitals the NWS used until 2016.
913
ACUS11 KWNS 220041
SWOMCD
SPC MCD 220040
TXZ000-NMZ000-220215-
MESOSCALE DISCUSSION 0862
NWS STORM PREDICTION CENTER NORMAN OK
0740 PM CDT MON MAY 21 2012
AREAS AFFECTED...NERN NEW MEXICO INTO THE WESTERN TEXAS PANHANDLE
CONCERNING...SEVERE THUNDERSTORM WATCH 287...
VALID 220040Z - 220215Z
THE SEVERE WEATHER THREAT FOR SEVERE THUNDERSTORM WATCH 287
CONTINUES.
SUMMARY...RISK FOR LARGE HAIL AND POTENTIALLY DAMAGING WIND GUSTS
CONTINUES NEAR CONVECTION THIS EVENING. HOWEVER...THE NEED FOR A
NEW WW IS NOT CURRENTLY ANTICIPATED.
DISCUSSION...CONVECTION HAS GENERALLY PROPAGATED OFF THE HIGHER
TERRAIN AND SPREAD THROUGH MUCH OF NORTHEASTERN NEW MEXICO DURING
THE PAST FEW HOURS. ASSOCIATED SURFACE COLD POOLS APPEAR LIKELY TO
MERGE SHORTLY NEAR/NORTH AND EAST OF TUCUMCARI...CONTRIBUTING TO
FURTHER STORM CONSOLIDATION. MODELS ARE SUGGESTIVE THAT THIS
PROBABLY WILL BE SUSTAINED BY LOWER/MID TROPOSPHERIC WARM ADVECTION
ACROSS AND SOUTHEAST OF AN AREA BOUNDED BY TUCUMCARI/CLOVIS AND
DALHART BETWEEN NOW AND 02-03Z...IN THE PRESENCE OF LINGERING WEAK
TO MODERATE INSTABILITY. IT IS NOT CLEAR THAT THERE WILL BE A
SUBSTANTIVE FURTHER INCREASE IN SEVERE WEATHER POTENTIAL...BEFORE
THE ONSET OF MORE SURFACE COOLING LATER THIS EVENING.
HOWEVER...SIZABLE SUB-CLOUD TEMPERATURE/DEW POINT SPREADS COULD
CONTRIBUTE TO A FEW STRONG DOWNBURSTS THROUGH STORM DISSIPATION.
..KERR.. 05/22/2012
...PLEASE SEE WWW.SPC.NOAA.GOV FOR GRAPHIC PRODUCT...
ATTN...WFO...LUB...AMA...ABQ...
LAT...LON 36270341 36370280 35640214 34590167 34130193 33940308
34380386 35140361 36270341SPC that day
Everything else SPC issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| May 22, 1:06 PM MDT | Mesoscale Discussion | SPC | Harding, Union | 84 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 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.