Alert archive / Texas / Severe Thunderstorm Watches in 2012

Severe Thunderstorm Watch 153

April 9, 2012Eddy County, Lea County, New Mexico; 24 counties in Texas

The Storm Prediction Center issued this severe thunderstorm watch at Apr 9, 2012, 4:32 PM MDT for Eddy County, Lea County, New Mexico; 24 counties in Texas. It was in force for 7 hr.

The area

The outline as issued.

The facts

Issued
Apr 9, 2012, 4:32 PM MDT (22:32 UTC)
Expired
Apr 10, 2012, 12:00 AM MDT
In force
7 hr
Issued by
the Storm Prediction Center
Largest hail expected
2 in
Strongest gust expected
60 kt
All 26 counties

Eddy County, NM, Lea County, NM, Andrews County, TX, Brewster County, TX, Crane County, TX, Crockett County, TX, Culberson County, TX, Dawson County, TX, Ector County, TX, Gaines County, TX, Glasscock County, TX, Jeff Davis County, TX, Loving County, TX, Lynn County, TX, Martin County, TX, Midland County, TX, Pecos County, TX, Presidio County, TX, Reagan County, TX, Reeves County, TX, Terrell County, TX, Terry County, TX, Upton County, TX, Ward County, TX, Winkler County, TX, Yoakum County, TX

The radar

The Midland/Odessa radar (KMAF), 117 km from the middle of the area, began a volume at 22:34 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.

What SPC expected

The probabilities SPC published with the watch, for the watch area over its life.

Two or more tornadoes
10%
One or more EF2 to EF5 tornadoes
5%
Ten or more severe wind reports
20%
One or more gusts of 65 knots or more
5%
Ten or more severe hail reports
30%
One or more hailstones of 2 inches or more
20%
Six or more combined severe hail and wind reports
70%

Warnings issued inside it

17 tornado, severe thunderstorm and flash flood warnings for its counties while it was in force.

IssuedProductOfficeCountiesLasted
Apr 9, 4:36 PM MDTSevere Thunderstorm WarningMAFEddy54 min
Apr 9, 4:46 PM MDTSevere Thunderstorm WarningMAFBrewster, Jeff Davis, Pecos59 min
Apr 9, 5:12 PM MDTSevere Thunderstorm WarningMAFEddy63 min
Apr 9, 5:42 PM MDTSevere Thunderstorm WarningMAFBrewster, Pecos63 min
Apr 9, 5:53 PM MDTSevere Thunderstorm WarningMAFEddy52 min
Apr 9, 6:04 PM MDTSevere Thunderstorm WarningMAFCulberson, Loving, Reeves56 min
Apr 9, 6:39 PM MDTSevere Thunderstorm WarningMAFLoving, Reeves, Ward36 min
Apr 9, 6:50 PM MDTSevere Thunderstorm WarningMAFLea55 min
Apr 9, 7:02 PM MDTTornado WarningMAFReeves, Ward28 min
Apr 9, 7:12 PM MDTSevere Thunderstorm WarningMAFEddy63 min
Apr 9, 7:13 PM MDTSevere Thunderstorm WarningMAFLoving, Reeves, Ward62 min
Apr 9, 7:21 PM MDTSevere Thunderstorm WarningMAFLea54 min
Apr 9, 7:28 PM MDTTornado WarningMAFReeves, Ward32 min
Apr 9, 8:40 PM MDTSevere Thunderstorm WarningLUBYoakum65 min
Apr 9, 9:58 PM MDTSevere Thunderstorm WarningMAFJeff Davis, Pecos, Reeves62 min
Apr 9, 10:57 PM MDTSevere Thunderstorm WarningMAFBrewster, Jeff Davis, Pecos, Reeves63 min
Apr 9, 11:11 PM MDTTornado WarningMAFBrewster, Pecos34 min

Discussions around it

SPC mesoscale discussions over the same counties from four hours before the watch to its end.

The nearest sounding before it

Midland Regional, TX (KMAF), launched 12:00Z, 10.5 hours before the alert went out and 116 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.

Skew-T log-pSkew-T log-p diagram, Midland Regional, TX at 12:00Z on 2012-04-09Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 62 joules per kilogram.LCLLFCEL10008507005003002001001 km2 km3 km6 km9 km12 km15 km-30°-20°-10°0°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Midland Regional, TX at 12:00Z on 2012-04-09The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 46 square meters per square second.19395878Sfc1 km3 km6 km9 kmRMLM
The wind turning with height, colored by layer: ground to 1 km, 1 to 3 km, 3 to 6 km, 6 to 10 km.
Mixed-layer CAPE
62 J/kg
Mixed-layer CIN
-303 J/kg
Mixed-layer LCL
1056 m above ground
0-6 km bulk shear
40 kt
0-1 km storm-relative helicity
46 m²/s²
0-3 km storm-relative helicity
29 m²/s²
Significant tornado parameter
0.0
Supercell composite
-0.0

Open this sounding in Storm Lab

SPC that day

Everything else SPC issued on the same UTC day.

IssuedProductOfficeCountiesLasted
Apr 9, 4:03 PM MDTMesoscale DiscussionSPCEddy, Lea87 min
Apr 9, 12:54 PM MDTMesoscale DiscussionSPCHemphill, Lipscomb, Wheeler96 min
Apr 9, 2:06 PM MDTMesoscale DiscussionSPCArmstrong, Bailey, Borden, Briscoe, Carson, Castro and 31 more54 min
Apr 9, 2:23 PM MDTSevere Thunderstorm WatchSPCArmstrong, Bailey, Briscoe, Carson, Castro, Childress and 27 more8 hr
Apr 9, 4:37 PM MDTMesoscale DiscussionSPCArmstrong, Briscoe, Carson, Castro, Childress, Cochran and 22 more83 min
Apr 9, 5:27 PM MDTTornado WatchSPCBaylor, Foard, Hardeman, Knox, Wichita, Wilbarger8 hr

Nearby

Severe Thunderstorm Watches in Texas, 2012Severe Thunderstorm Watches in New Mexico, 2012Every severe thunderstorm watch 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.