Alert archive / Texas / Severe Thunderstorm Watches in 2016

Severe Thunderstorm Watch 480

September 17, 20164 counties in New Mexico; 14 counties in Texas

The Storm Prediction Center issued this severe thunderstorm watch at Sep 17, 2016, 2:02 PM MDT for 4 counties in New Mexico; 14 counties in Texas. It was in force for 7 hr.

The area

The outline as issued.

The facts

Issued
Sep 17, 2016, 2:02 PM MDT (20:02 UTC)
Expired
Sep 17, 2016, 9:00 PM MDT
In force
7 hr
Issued by
the Storm Prediction Center
Largest hail expected
2 in
Strongest gust expected
60 kt

Counties Chaves County, NM, Eddy County, NM, Lea County, NM, Lincoln County, NM, Andrews County, TX, Crane County, TX, Culberson County, TX, Ector County, TX, Gaines County, TX, Jeff Davis County, TX, Loving County, TX, Martin County, TX, Midland County, TX, Pecos County, TX, Reeves County, TX, Upton County, TX, Ward County, TX, Winkler County, TX

The radar

The Midland/Odessa radar (KMAF), 189 km from the middle of the area, began a volume at 20:03 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
20%
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
40%
One or more hailstones of 2 inches or more
30%
Six or more combined severe hail and wind reports
60%

Warnings issued inside it

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

IssuedProductOfficeCountiesLasted
Sep 17, 3:06 PM MDTSevere Thunderstorm WarningABQChaves39 min
Sep 17, 3:24 PM MDTSevere Thunderstorm WarningMAFEddy66 min
Sep 17, 3:28 PM MDTSevere Thunderstorm WarningMAFJeff Davis, Reeves47 min
Sep 17, 4:11 PM MDTSevere Thunderstorm WarningMAFJeff Davis, Reeves64 min
Sep 17, 4:26 PM MDTSevere Thunderstorm WarningMAFEddy64 min
Sep 17, 4:42 PM MDTSevere Thunderstorm WarningMAFLea33 min
Sep 17, 4:56 PM MDTSevere Thunderstorm WarningMAFLea49 min
Sep 17, 5:00 PM MDTSevere Thunderstorm WarningMAFAndrews, Ector, Martin, Midland60 min
Sep 17, 5:11 PM MDTSevere Thunderstorm WarningMAFLea64 min
Sep 17, 5:11 PM MDTSevere Thunderstorm WarningMAFLea64 min
Sep 17, 5:22 PM MDTSevere Thunderstorm WarningMAFEddy, Lea53 min
Sep 17, 5:31 PM MDTSevere Thunderstorm WarningMAFCulberson59 min
Sep 17, 5:41 PM MDTTornado WarningMAFAndrews, Winkler34 min
Sep 17, 6:06 PM MDTSevere Thunderstorm WarningMAFGaines54 min
Sep 17, 6:07 PM MDTSevere Thunderstorm WarningMAFCulberson, Jeff Davis53 min
Sep 17, 6:12 PM MDTTornado WarningMAFAndrews, Ector, Winkler33 min
Sep 17, 6:17 PM MDTSevere Thunderstorm WarningMAFEddy, Lea58 min
Sep 17, 6:21 PM MDTTornado WarningMAFEddy24 min
Sep 17, 6:30 PM MDTSevere Thunderstorm WarningMAFCulberson45 min
Sep 17, 6:34 PM MDTTornado WarningMAFLea26 min
Sep 17, 6:40 PM MDTSevere Thunderstorm WarningMAFEctor50 min
Sep 17, 6:51 PM MDTSevere Thunderstorm WarningMAFBorden, Dawson, Howard, Martin54 min
Sep 17, 6:53 PM MDTTornado Warning Tornado observedMAFEctor37 min
Sep 17, 6:59 PM MDTTornado WarningMAFLea31 min
Sep 17, 7:05 PM MDTSevere Thunderstorm WarningMAFEddy55 min
Sep 17, 7:15 PM MDTSevere Thunderstorm WarningMAFLea60 min
Sep 17, 7:18 PM MDTTornado WarningMAFEctor, Midland27 min
Sep 17, 7:19 PM MDTFlash Flood WarningMAFEctor3 hr
Sep 17, 7:27 PM MDTTornado WarningMAFLea33 min
Sep 17, 7:43 PM MDTSevere Thunderstorm WarningMAFEctor, Midland, Upton47 min
Sep 17, 8:03 PM MDTSevere Thunderstorm WarningMAFCulberson, Loving, Reeves57 min
Sep 17, 8:12 PM MDTSevere Thunderstorm WarningMAFLea63 min
Sep 17, 8:23 PM MDTFlash Flood WarningMAFGlasscock, Howard, Martin, Midland3 hr
Sep 17, 8:27 PM MDTSevere Thunderstorm WarningMAFMidland, Reagan, Upton48 min
Sep 17, 8:42 PM MDTSevere Thunderstorm WarningMAFLoving63 min
Sep 17, 8:48 PM MDTSevere Thunderstorm WarningMAFReeves42 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, 8.0 hours before the alert went out and 187 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 2016-09-17Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 1130 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 2016-09-17The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 142 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
1130 J/kg
Mixed-layer CIN
-141 J/kg
Mixed-layer LCL
957 m above ground
0-6 km bulk shear
45 kt
0-1 km storm-relative helicity
142 m²/s²
0-3 km storm-relative helicity
146 m²/s²
Significant tornado parameter
0.0
Supercell composite
2.1

Open this sounding in Storm Lab

SPC that day

Everything else SPC issued on the same UTC day.

IssuedProductOfficeCountiesLasted
Sep 17, 1:33 PM MDTMesoscale DiscussionSPCChaves, Eddy, Lea57 min
Sep 17, 1:38 PM MDTMesoscale DiscussionSPCHarding, Union2 hr
Sep 17, 2:19 PM MDTSevere Thunderstorm WatchSPCColfax, Harding, Mora, Quay, San Miguel, Union10 hr
Sep 17, 4:33 PM MDTMesoscale DiscussionSPCHarding, Quay, San Miguel, Union117 min
Sep 17, 4:56 PM MDTMesoscale DiscussionSPCChaves, Eddy, Lea, Roosevelt2 hr
Sep 16, 6:05 PM MDTMesoscale DiscussionSPCCallahan, Coke, Coleman, Ector, Glasscock, Howard and 6 more115 min
Sep 17, 12:18 PM MDTMesoscale DiscussionSPCCollingsworth, Wheeler87 min

Nearby

Severe Thunderstorm Watches in Texas, 2016Severe Thunderstorm Watches in New Mexico, 2016Every severe thunderstorm watch in 2016

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.