Alert archive / Texas / Severe Thunderstorm Warnings in 1999
Severe Thunderstorm Warning 3, NWS Austin/San Antonio, TX
NWS Austin/San Antonio, TX issued this severe thunderstorm warning at Jan 1, 1999, 5:44 PM CST for Caldwell County, Hays County, Texas. It was in force for 91 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
- Jan 1, 1999, 5:44 PM CST (23:44 UTC)
- Expired
- Jan 1, 1999, 7:15 PM CST
- In force
- 91 min
- Issued by
- NWS Austin/San Antonio, TX
- Area
- Whole counties
Counties Caldwell County, TX, Hays County, TX
What was reported inside it
| Time | Report | Where | Remark |
|---|---|---|---|
| Jan 1, 6:45 PM CST | Hail 0.75 | Lytton Spgs, 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 nearest sounding before it
Corpus Christi, TX (KCRP), launched 12:00Z, 11.7 hours before the alert went out and 251 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.
- Mixed-layer CAPE
- 449 J/kg
- Mixed-layer CIN
- -20 J/kg
- Mixed-layer LCL
- 549 m above ground
- 0-6 km bulk shear
- 32 kt
- 0-1 km storm-relative helicity
- 69 m²/s²
- 0-3 km storm-relative helicity
- 172 m²/s²
- Significant tornado parameter
- 0.1
- Supercell composite
- 1.3
The text
As transmitted, in the capitals the NWS used until 2016.
000 TTAA00 KSAT 012344 RRA SVRSAT TXC029-055-091-187-209-020115- BULLETIN - IMMEDIATE BROADCAST REQUESTED SEVERE THUNDERSTORM WARNING NATIONAL WEATHER SERVICE AUSTIN/SAN ANTONIO TX 544 PM CST FRI JAN 1 1999 THE NATIONAL WEATHER SERVICE IN AUSTIN/SAN ANTONIO HAS ISSUED A * SEVERE THUNDERSTORM WARNING FOR... COMAL IN TEXAS HAYS IN TEXAS CALDWELL IN TEXAS BEXAR IN TEXAS GUADALUPE IN TEXAS * UNTIL 715 PM CST * AT 545 PM CST...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A SEVERE THUNDERSTORM SEVERAL STORMS ALONG IH35 FROM EAST SAN ANTONIO TO EAST AUSTIN... MOVING NORTHEAST AT NEAR 25 MPH. * THE SEVERE THUNDERSTORM WILL BE NEAR... NEW BRAUNFELS SAN MARCOS SEGUIN BUDA LOCKART IN THE NEXT 30 MINUTES OR LESS. SEVERE THUNDERSTORMS CAN AND OCCASIONALLY DO PRODUCE TORNADOES WITH LITTLE OR NO ADVANCE WARNING. GO INSIDE A STURDY BUILDING AND STAY AWAY FROM WINDOWS! JDS
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 Austin/San Antonio, TX wrote its last area forecast discussion before this severe thunderstorm warning went out at Dec 31, 7:40 PM CST, 22 hours 4 minutes earlier.
Area forecast discussion, Dec 31, 7:40 PM CST, 22 hours 4 minutes before
DEEP SOUTH TEXAS FORECAST DISCUSSION NATIONAL WEATHER SERVICE BROWNSVILLE TX 740 PM CST THU DEC 31 1998 NO CHANGES. SCT SHRAS OVR COASTAL COUNTIES TDY...WITH TSRAS CONT 40 NM OFF THE COAST OF KENEDY COUNTY. MDLS ALL BRING THE CD FNT THRU VLY EARLY SAT MRNG WITH VERY COLD AIR XPCTD. SFC WNDS S 20-30 MPH PROGD BY ETA AND AVN WITH NGM MOS PREDICTING WNDS SUSTAINED IN THE MID 20S FRI PM. POST FROPA WNDS 25 TO 35 MPH LIKELY...WITH AVN SUSTAINED NW WNDS PREDICTED AT 30 KTS SAT NOON. ALTHOUGH SUN AND MON APPEAR VERY COLD ATTM...WINDS SHOULD NOT CALM OUT DURING EARLY SUN MRNG WITH MSTR RETAINED IN THE ATM. RADIATIONAL COOLING IS NEGATED...WITH CAA PRIMARY COOLER THEN. WRN VLY REFLECTING 32 TO 35 DEG F SUN MRNG BY AVN...WITH NEAR 40 COAST. MRF HAS 1032MB HIGH CENTERED OVR ACT 7 AM MON WITH VLY IN 549 TO 552DM 1000-500MB THICKNESSES. MON AM MAY BE MORE OF A PRBLM. MFE BKN055 NOW WITH BRO SCT0450 AND HRL CLR. NO CHANGES NECESSARY ATTM. 58 .BRO...NONE
The office that day
Everything else NWS Austin/San Antonio, TX issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jan 1, 5:00 PM CST | Severe Thunderstorm Warning | EWX | Travis | 75 min |
| Jan 1, 5:44 PM CST | Severe Thunderstorm Warning | EWX | Bexar, Comal, Guadalupe | 91 min |
| Jan 1, 5:54 PM CST | Flash Flood Warning | EWX | Travis, Williamson | 2 hr |
Nearby
Severe Thunderstorm Warnings in Texas, 1999Every severe thunderstorm warning 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.