Alert archive / Texas / Mesoscale Discussions in 2012
Mesoscale Discussion 620
The Storm Prediction Center issued this mesoscale discussion at Apr 29, 2012, 2:13 AM MDT for Curry County, Quay County, San Miguel County, New Mexico; 4 counties in Oklahoma; 15 counties in Texas. It was in force for 92 min.
The area
The outline as issued.
The facts
- Issued
- Apr 29, 2012, 2:13 AM MDT (08:13 UTC)
- Expired
- Apr 29, 2012, 3:45 AM MDT
- In force
- 92 min
- Issued by
- the Storm Prediction Center
All 22 counties
Curry County, NM, Quay County, NM, San Miguel County, NM, Beckham County, OK, Custer County, OK, Dewey County, OK, Roger Mills County, OK, Armstrong County, TX, Carson County, TX, Castro County, TX, Collingsworth County, TX, Deaf Smith County, TX, Donley County, TX, Gray County, TX, Hemphill County, TX, Oldham County, TX, Parmer County, TX, Potter County, TX, Randall County, TX, Roberts County, TX, Swisher County, TX, Wheeler County, TX
The radar
The Amarillo radar (KAMA), 46 km from the middle of the area, began a volume at 08:14 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, 8.2 hours before the alert went out and 47 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
- 2581 m above ground
- 0-6 km bulk shear
- 67 kt
- 0-1 km storm-relative helicity
- 50 m²/s²
- 0-3 km storm-relative helicity
- 153 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted, in the capitals the NWS used until 2016.
752
ACUS11 KWNS 290813
SWOMCD
SPC MCD 290813
OKZ000-TXZ000-NMZ000-290945-
MESOSCALE DISCUSSION 0620
NWS STORM PREDICTION CENTER NORMAN OK
0313 AM CDT SUN APR 29 2012
AREAS AFFECTED...ERN NM/THE TX PANHANDLE/WRN OK
CONCERNING...SEVERE POTENTIAL...WATCH UNLIKELY
VALID 290813Z - 290945Z
THREAT FOR LARGE HAIL AND AN ISOLATED/DAMAGING GUST HAS EVOLVED
ACROSS THE DISCUSSION AREA...BUT WITH THREAT ONGOING AND UNLIKELY TO
EXPAND FURTHER...WW IS NOT ANTICIPATED.
LATEST RADAR DATA SHOWS STORMS SHIFTING EWD ACROSS PARTS OF ERN NM
AND THE TX PANHANDLE AND INTO FAR WRN OK...TO THE COOL SIDE OF A
FRONT WHICH REMAINS WELL SE OF THE AREA -- ACROSS THE TX SOUTH
PLAINS AND NEWD INTO CENTRAL OK. OBJECTIVE ANALYSES AND POINT
FORECAST SOUNDINGS FROM AN ASSORTMENT OF MODELS CONTINUE TO REVEAL
VERY MODEST/ELEVATED CAPE ON THE ORDER OF ONLY SEVERAL HUNDRED
J/KG...BUT UNEXPECTED INTENSIFICATION/ORGANIZATION OF THE STORMS
OVER THE PAST HOUR OR SO REVEALS OTHERWISE. ALONG WITH A RISK FOR
LARGE HAIL WITH STRONGER STORMS...A CELL JUST EAST OF AMA HAS SHOWN
AT LEAST TRANSIENT BOWING STRUCTURES -- ALONG WITH RADAR-MEASURED
WINDS IN EXCESS OF 65 KT LESS THAN 1000 FEET OFF THE SURFACE. THUS
-- DESPITE A RELATIVELY DEEP/STABLE BOUNDARY LAYER...A LOCALLY
DAMAGING GUST CANNOT BE RULED OUT.
..GOSS.. 04/29/2012
...PLEASE SEE WWW.SPC.NOAA.GOV FOR GRAPHIC PRODUCT...
ATTN...WFO...OUN...LUB...AMA...ABQ...
LAT...LON 34560422 35280495 35720499 35700242 35870073 36089959
35929858 34770008 34430231 34560422SPC that day
Everything else SPC issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Apr 29, 1:22 PM MDT | Mesoscale Discussion | SPC | Harding, Union | 113 min |
| Apr 29, 4:10 PM MDT | Severe Thunderstorm Watch | SPC | Union | 8 hr |
| Apr 29, 4:17 PM MDT | Mesoscale Discussion | SPC | Chaves, Curry, De Baca, Guadalupe, Harding, Lea and 2 more | 88 min |
| Apr 28, 9:36 PM MDT | Tornado Watch | SPC | Caddo, Canadian, Cleveland, Comanche, Cotton, Garvin and 11 more | 3 hr |
| Apr 28, 9:54 PM MDT | Mesoscale Discussion | SPC | Caddo, Canadian, Cleveland, Comanche, Cotton, Grady and 4 more | 2 hr |
| Apr 28, 10:52 PM MDT | Severe Thunderstorm Watch | SPC | Adair, Cherokee, Craig, Creek, Delaware, McIntosh and 13 more | 5 hr |
| Apr 29, 12:37 AM MDT | Mesoscale Discussion | SPC | Alfalfa, Beckham, Blaine, Custer, Dewey, Garfield and 8 more | 23 min |
| Apr 29, 12:53 AM MDT | Mesoscale Discussion | SPC | Adair, Cherokee, Craig, Creek, Delaware, Kay and 12 more | 2 hr |
| Apr 29, 4:51 PM MDT | Mesoscale Discussion | SPC | Alfalfa, Canadian, Craig, Creek, Garfield, Grant and 17 more | 2 hr |
Nearby
Mesoscale Discussions in Texas, 2012Mesoscale Discussions in Oklahoma, 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.