Alert archive / Texas / Tornado Watches in 1999

Tornado Watch 191

April 30, 19995 counties in New Mexico; 14 counties in Texas

The Storm Prediction Center issued this tornado watch at Apr 30, 1999, 4:00 PM MDT for 5 counties in New Mexico; 14 counties in Texas. It was in force for 6 hr.

The area

The outline as issued.

The facts

Issued
Apr 30, 1999, 4:00 PM MDT (22:00 UTC)
Expired
Apr 30, 1999, 10:00 PM MDT
In force
6 hr
Issued by
the Storm Prediction Center

Counties Chaves County, NM, De Baca County, NM, Eddy County, NM, Lea County, NM, Roosevelt County, NM, Andrews County, TX, Cochran County, TX, Crane County, TX, Ector County, TX, Gaines County, TX, Loving County, TX, Midland County, TX, Pecos County, TX, Reeves County, TX, Terrell County, TX, Upton County, TX, Ward County, TX, Winkler County, TX, Yoakum County, TX

The radar

The Midland/Odessa radar (KMAF), 118 km from the middle of the area, began a volume at 22:00 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.

Warnings issued inside it

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

IssuedProductOfficeCountiesLasted
Apr 30, 4:12 PM MDTTornado WarningMAFLea33 min
Apr 30, 4:27 PM MDTSevere Thunderstorm WarningLUBYoakum48 min
Apr 30, 4:43 PM MDTFlash Flood WarningLUBYoakum3 hr
Apr 30, 4:47 PM MDTSevere Thunderstorm WarningMAFGaines58 min
Apr 30, 5:07 PM MDTTornado WarningLUBYoakum33 min
Apr 30, 5:21 PM MDTSevere Thunderstorm WarningMAFLoving44 min
Apr 30, 5:40 PM MDTTornado WarningLUBYoakum30 min
Apr 30, 5:40 PM MDTSevere Thunderstorm WarningMAFGaines50 min
Apr 30, 5:48 PM MDTFlash Flood WarningLUBCochran, Lamb4 hr
Apr 30, 5:52 PM MDTFlash Flood WarningMAFLea4 hr
Apr 30, 6:16 PM MDTFlash Flood WarningMAFGaines3 hr
Apr 30, 6:36 PM MDTSevere Thunderstorm WarningMAFGaines39 min
Apr 30, 8:58 PM MDTFlash Flood WarningMAFDawson, Gaines107 min

The nearest sounding before it

Midland Regional, TX (KMAF), launched 12:00Z, 10.0 hours before the alert went out and 117 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 1999-04-30Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 21 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 1999-04-30The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 216 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
21 J/kg
Mixed-layer CIN
-289 J/kg
Mixed-layer LCL
1062 m above ground
0-6 km bulk shear
41 kt
0-1 km storm-relative helicity
216 m²/s²
0-3 km storm-relative helicity
296 m²/s²
Significant tornado parameter
0.0
Supercell composite
1.8

Open this sounding in Storm Lab

The text

The text of this product is not in the archive. The NWS text archive before 2002 is incomplete.

SPC that day

Everything else SPC issued on the same UTC day.

IssuedProductOfficeCountiesLasted
Apr 30, 11:15 AM MDTSevere Thunderstorm WatchSPCLea6 hr

Nearby

Tornado Watches in Texas, 1999Tornado Watches in New Mexico, 1999Every tornado watch in 1999

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.