Alert archive / Texas / Tornado Warnings in 1999

Tornado Warning 21, NWS San Angelo, TX

May 4, 1999Schleicher County, Texas

NWS San Angelo, TX issued this tornado warning at May 4, 1999, 3:33 AM CDT for Schleicher County, Texas. It was in force for 92 min. 1 report came from inside the area while it was in force.

The area

The counties it named, with what was reported inside it.

The facts

Issued
May 4, 1999, 3:33 AM CDT (08:33 UTC)
Expired
May 4, 1999, 5:05 AM CDT
In force
92 min
Issued by
NWS San Angelo, TX
Area
Whole counties

County Schleicher County, TX

The radar

The San Angelo radar (KSJT), 53 km from the middle of the area, began a volume at 08:33 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 was reported inside it

TimeReportWhereRemark
May 4, 3:40 AM CDTHail 0.75Eldorado, TX

NCEI Storm Data entries that began inside the alert's area while it was in force. Before 2003 the local storm report archive is thin, so this is the record of what happened rather than what was phoned in.

The watch it was issued in

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

IssuedProductOfficeLasted
May 4, 3:00 AM CDTTornado WatchSPC2 hr

The nearest sounding before it

Del Rio, TX (KDRT), launched 00:00Z, 8.6 hours before the alert went out and 172 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 00:00Z on 1999-05-04Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 4329 joules per kilogram.LCLEL10008507005003002001001 km2 km3 km6 km9 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 00:00Z on 1999-05-04The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 167 square meters per square second.1939587897Sfc1 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
4329 J/kg
Mixed-layer CIN
-5 J/kg
Mixed-layer LCL
829 m above ground
0-6 km bulk shear
75 kt
0-1 km storm-relative helicity
167 m²/s²
0-3 km storm-relative helicity
347 m²/s²
Significant tornado parameter
7.9
Supercell composite
28.4

Open this sounding in Storm Lab

The text

As transmitted, in the capitals the NWS used until 2016.

000 
TTAA00 KSJT 040833 RRA
TORSJT
TXC413-041005-

BULLETIN - EAS ACTIVATION REQUESTED
TORNADO WARNING
NATIONAL WEATHER SERVICE SAN ANGELO TX
333 AM CDT TUE MAY 4 1999

THE NATIONAL WEATHER SERVICE IN SAN ANGELO HAS ISSUED A

* TORNADO WARNING FOR...
  NORTHERN SCHLEICHER COUNTY IN WEST CENTRAL TEXAS

* UNTIL 505 AM CDT

* AT 332 AM CDT... DOPPLER RADAR AT SAN ANGELO INDICATED A
  TORNADO 8 MILES NORTHEAST OF ELDORADO... MOVING EAST AT 15 MPH.

A FLASH FLOOD WARNING ALSO CONTINUES UNTIL 620 AM CDT.

ABANDON MOBILE HOMES! GO IN A NEARBY STURDY BUILDING. AS A LAST
RESORT LIE FLAT IN A DITCH AND COVER YOUR HEAD.

12

The office that day

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

IssuedProductOfficeCountiesLasted
May 3, 7:06 PM CDTSevere Thunderstorm WarningSJTNolan79 min
May 3, 7:32 PM CDTTornado WarningSJTSterling58 min
May 3, 7:40 PM CDTSevere Thunderstorm WarningSJTMitchell65 min
May 3, 7:44 PM CDTSevere Thunderstorm WarningSJTFisher61 min
May 3, 7:52 PM CDTTornado WarningSJTMitchell, Nolan83 min
May 3, 8:01 PM CDTFlash Flood WarningSJTSterling3 hr
May 3, 8:01 PM CDTSevere Thunderstorm WarningSJTCoke79 min
May 3, 8:19 PM CDTSevere Thunderstorm WarningSJTHaskell26 min
May 3, 8:26 PM CDTSevere Thunderstorm WarningSJTSterling64 min
May 3, 8:39 PM CDTSevere Thunderstorm WarningSJTTaylor66 min
May 3, 8:47 PM CDTTornado WarningSJTTaylor58 min
May 3, 8:51 PM CDTFlash Flood WarningSJTCoke3 hr
May 3, 8:56 PM CDTTornado WarningSJTSterling79 min
May 3, 9:13 PM CDTSevere Thunderstorm WarningSJTCoke62 min
May 3, 9:22 PM CDTSevere Thunderstorm WarningSJTTom Green83 min
May 3, 9:40 PM CDTSevere Thunderstorm WarningSJTTaylor65 min
May 3, 9:42 PM CDTTornado WarningSJTCoke, Tom Green63 min
May 3, 9:52 PM CDTSevere Thunderstorm WarningSJTCallahan68 min
May 3, 10:25 PM CDTSevere Thunderstorm WarningSJTTaylor45 min
May 3, 10:44 PM CDTSevere Thunderstorm WarningSJTCoke, Runnels76 min
May 3, 11:20 PM CDTSevere Thunderstorm WarningSJTTaylor55 min
May 4, 1:51 AM CDTSevere Thunderstorm WarningSJTIrion64 min
May 4, 2:01 AM CDTSevere Thunderstorm WarningSJTSchleicher94 min
May 4, 2:13 AM CDTSevere Thunderstorm WarningSJTTom Green62 min
May 4, 2:22 AM CDTTornado WarningSJTSchleicher78 min
May 4, 3:16 AM CDTFlash Flood WarningSJTSchleicher3 hr
May 4, 4:20 AM CDTTornado WarningSJTMenard50 min
May 4, 5:08 AM CDTTornado WarningSJTMenard42 min
May 4, 5:48 AM CDTTornado WarningSJTMason, Menard47 min
May 4, 6:32 AM CDTTornado WarningSJTMason48 min

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; verification from NCEI's Storm Data; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.