Alert archive / Texas / Severe Thunderstorm Warnings in 1998

Severe Thunderstorm Warning 33, NWS San Angelo, TX

April 8, 1998McCulloch County, San Saba County, Texas

NWS San Angelo, TX issued this severe thunderstorm warning at Apr 8, 1998, 1:00 AM CDT for McCulloch County, San Saba County, Texas. It was in force for 60 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
Apr 8, 1998, 1:00 AM CDT (06:00 UTC)
Expired
Apr 8, 1998, 2:00 AM CDT
In force
60 min
Issued by
NWS San Angelo, TX
Area
Whole counties

Counties McCulloch County, TX, San Saba County, TX

The radar

The San Angelo radar (KSJT), 136 km from the middle of the area, began a volume at 06:01 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 nearest sounding before it

Fort Worth, TX (KFWD), launched 00:00Z, 6.0 hours before the alert went out and 250 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, Fort Worth, TX at 00:00Z on 1998-04-08Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 0 joules per kilogram.LCL10008507005003002001001 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, Fort Worth, TX at 00:00Z on 1998-04-08The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 16 square meters per square second.1939587897117136156Sfc1 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
0 J/kg
Mixed-layer CIN
No buoyant parcel
Mixed-layer LCL
3263 m above ground
0-6 km bulk shear
62 kt
0-1 km storm-relative helicity
16 m²/s²
0-3 km storm-relative helicity
129 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.0

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.

What forecasters said that day

The local office's own words before this severe thunderstorm warning went out, as it sent them, from the Iowa Environmental Mesonet's archive of National Weather Service text.

NWS San Angelo, TX wrote its last area forecast discussion before this severe thunderstorm warning went out at Apr 7, 9:09 PM CDT, 3 hours 51 minutes earlier.

Area forecast discussion, Apr 7, 9:09 PM CDT, 3 hours 51 minutes before
AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE SAN ANGELO TX
909 PM CDT TUE APR 7 1998

COORDINATED BRIEFLY WITH FTW REGARDING WIND DIRECTION AND THE
ISOLATED SHOWERS DEVELOPING OVER MCCULLOCH/SAN SABA COUNTIES ALONG A
STALLED OUT DRYLINE. BELIEVE THAT LOW LEVEL WINDS IN ADVANCE OF THE
850 MB TROUGH COULD SUPPORT SOME TSRA OVER THIS AREA SO RECOMMEND
SLIGHT CHANCE POPS FOR THIS AREA AS WELL AS KIMBLE AND MASON
COUNTIES. OTHERWISE WILL ONLY MAKE COSMETIC CHANGES TO WINDS WITH THE
REMAINDER OF FORECASTS ON TRACK.

15

The office that day

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

IssuedProductOfficeCountiesLasted
Apr 8, 12:15 AM CDTSevere Thunderstorm WarningSJTBrown, Coleman, McCulloch60 min
Apr 8, 1:08 AM CDTSevere Thunderstorm WarningSJTSutton62 min
Apr 8, 1:32 AM CDTSevere Thunderstorm WarningSJTMenard48 min
Apr 8, 1:42 AM CDTSevere Thunderstorm WarningSJTKimble78 min
Apr 8, 1:56 AM CDTTornado WarningSJTKimble59 min

Nearby

Severe Thunderstorm Warnings in Texas, 1998Every severe thunderstorm warning in 1998

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.