Alert archive / Texas / Severe Thunderstorm Watches in 2014

Severe Thunderstorm Watch 524

October 9, 2014Union County, New Mexico; 10 counties in Oklahoma; 20 counties in Texas

The Storm Prediction Center issued this severe thunderstorm watch at Oct 9, 2014, 4:16 PM MDT for Union County, New Mexico; 10 counties in Oklahoma; 20 counties in Texas. It was in force for 8 hr.

The area

The outline as issued.

The facts

Issued
Oct 9, 2014, 4:16 PM MDT (22:16 UTC)
Expired
Oct 10, 2014, 12:00 AM MDT
In force
8 hr
Issued by
the Storm Prediction Center
Largest hail expected
2 in
Strongest gust expected
60 kt
All 31 counties

Union County, NM, Beaver County, OK, Beckham County, OK, Cimarron County, OK, Ellis County, OK, Harper County, OK, Major County, OK, Roger Mills County, OK, Texas County, OK, Woods County, OK, Woodward 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), 111 km from the middle of the area, began a volume at 22:19 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
2%
Ten or more severe wind reports
30%
One or more gusts of 65 knots or more
10%
Ten or more severe hail reports
30%
One or more hailstones of 2 inches or more
30%
Six or more combined severe hail and wind reports
60%

Warnings issued inside it

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

IssuedProductOfficeCountiesLasted
Oct 9, 4:46 PM MDTSevere Thunderstorm WarningABQUnion44 min
Oct 9, 5:30 PM MDTSevere Thunderstorm WarningABQUnion60 min
Oct 9, 5:32 PM MDTSevere Thunderstorm WarningAMACimarron58 min
Oct 9, 5:46 PM MDTSevere Thunderstorm WarningAMAPotter59 min
Oct 9, 6:28 PM MDTSevere Thunderstorm WarningAMACarson, Potter62 min
Oct 9, 6:47 PM MDTSevere Thunderstorm WarningOUNEllis, Woodward43 min
Oct 9, 7:24 PM MDTSevere Thunderstorm WarningOUNEllis, Woodward51 min
Oct 9, 7:24 PM MDTTornado WarningAMACarson36 min
Oct 9, 7:27 PM MDTSevere Thunderstorm WarningAMACimarron48 min
Oct 9, 7:30 PM MDTSevere Thunderstorm WarningAMATexas32 min
Oct 9, 7:53 PM MDTSevere Thunderstorm WarningAMACarson, Gray, Roberts59 min
Oct 9, 8:08 PM MDTTornado WarningAMACarson, Gray52 min
Oct 9, 8:14 PM MDTSevere Thunderstorm WarningOUNWoodward46 min
Oct 9, 8:28 PM MDTSevere Thunderstorm WarningABQUnion47 min
Oct 9, 8:42 PM MDTSevere Thunderstorm WarningAMAGray, Hemphill, Roberts, Wheeler63 min
Oct 9, 8:54 PM MDTSevere Thunderstorm WarningAMADallam, Hartley51 min
Oct 9, 8:57 PM MDTSevere Thunderstorm WarningOUNMajor, Woods, Woodward48 min
Oct 9, 9:07 PM MDTTornado WarningAMADallam, Hartley23 min
Oct 9, 9:34 PM MDTSevere Thunderstorm WarningAMAHartley, Moore41 min
Oct 9, 9:35 PM MDTSevere Thunderstorm WarningAMAWheeler40 min
Oct 9, 9:41 PM MDTSevere Thunderstorm WarningOUNAlfalfa, Major, Woods49 min
Oct 9, 9:52 PM MDTSevere Thunderstorm WarningOUNBeckham, Roger Mills38 min
Oct 9, 10:01 PM MDTSevere Thunderstorm WarningAMATexas42 min
Oct 9, 10:08 PM MDTSevere Thunderstorm WarningAMAMoore27 min
Oct 9, 10:28 PM MDTSevere Thunderstorm WarningOUNBeckham, Roger Mills47 min
Oct 9, 11:00 PM MDTSevere Thunderstorm WarningOUNBeckham, Custer, Roger Mills, Washita45 min
Oct 9, 11:11 PM MDTSevere Thunderstorm WarningAMAHemphill, Lipscomb, Roberts64 min
Oct 9, 11:55 PM MDTSevere Thunderstorm WarningAMAHemphill35 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

Amarillo Airport, TX (KAMA), launched 12:00Z, 10.3 hours before the alert went out and 112 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, Amarillo Airport, TX at 12:00Z on 2014-10-09Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 26 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, Amarillo Airport, TX at 12:00Z on 2014-10-09The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity -8 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
26 J/kg
Mixed-layer CIN
-340 J/kg
Mixed-layer LCL
2106 m above ground
0-6 km bulk shear
18 kt
0-1 km storm-relative helicity
-8 m²/s²
0-3 km storm-relative helicity
17 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
Oct 9, 2:41 PM MDTMesoscale DiscussionSPCColfax, Harding, Union2 hr
Oct 9, 12:53 PM MDTMesoscale DiscussionSPCCraig, Delaware, Nowata, Ottawa97 min

Nearby

Severe Thunderstorm Watches in Texas, 2014Severe Thunderstorm Watches in Oklahoma, 2014Severe Thunderstorm Watches in New Mexico, 2014Every severe thunderstorm watch in 2014

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.