Alert archive / Texas / Tornado Warnings in 1999

Tornado Warning 32, NWS San Angelo, TX

May 11, 1999Mason County, Texas

NWS San Angelo, TX issued this tornado warning at May 11, 1999, 6:50 PM CDT for Mason County, Texas. It was in force for 65 min. No storm report in the archive falls inside the area while it was in force.

The area

The counties it named.

The facts

Issued
May 11, 1999, 6:50 PM CDT (23:50 UTC)
Expired
May 11, 1999, 7:55 PM CDT
In force
65 min
Issued by
NWS San Angelo, TX
Area
Whole counties

County Mason County, TX

The radar

The San Angelo radar (KSJT), 141 km from the middle of the area, began a volume at 23:51 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 watch it was issued in

The SPC watch in force over the same counties when this warning went out.

IssuedProductOfficeLasted
May 11, 3:30 PM CDTTornado WatchSPC7 hr

The nearest sounding before it

Del Rio, TX (KDRT), launched 12:00Z, 11.8 hours before the alert went out and 216 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, Del Rio, TX at 12:00Z on 1999-05-11Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 2571 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, Del Rio, TX at 12:00Z on 1999-05-11The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 126 square meters per square second.193958Sfc1 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
2571 J/kg
Mixed-layer CIN
-131 J/kg
Mixed-layer LCL
553 m above ground
0-6 km bulk shear
26 kt
0-1 km storm-relative helicity
126 m²/s²
0-3 km storm-relative helicity
186 m²/s²
Significant tornado parameter
0.0
Supercell composite
3.8

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.

The office that day

Everything else NWS San Angelo, TX issued on the same UTC day.

IssuedProductOfficeCountiesLasted
May 11, 3:35 PM CDTSevere Thunderstorm WarningSJTBrown65 min
May 11, 3:55 PM CDTTornado WarningSJTBrown, McCulloch50 min
May 11, 4:08 PM CDTTornado WarningSJTSan Saba67 min
May 11, 4:59 PM CDTSevere Thunderstorm WarningSJTBrown51 min
May 11, 5:12 PM CDTTornado WarningSJTSan Saba63 min
May 11, 5:14 PM CDTFlash Flood WarningSJTSan Saba3 hr
May 11, 5:45 PM CDTSevere Thunderstorm WarningSJTMcCulloch65 min
May 11, 5:49 PM CDTSevere Thunderstorm WarningSJTMason66 min
May 11, 5:49 PM CDTSevere Thunderstorm WarningSJTBrown41 min
May 11, 6:08 PM CDTTornado WarningSJTMason47 min
May 11, 6:53 PM CDTFlash Flood WarningSJTMason3 hr

Nearby

Tornado Warnings in Texas, 1999Every tornado warning in 1999Tornadoes 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.