Alert archive / Texas / Severe Thunderstorm Warnings in 1999
Severe Thunderstorm Warning 1, NWS Austin/San Antonio, TX
NWS Austin/San Antonio, TX issued this severe thunderstorm warning at Jan 1, 1999, 5:00 PM CST for Travis County, Texas. It was in force for 75 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
- Jan 1, 1999, 5:00 PM CST (23:00 UTC)
- Expired
- Jan 1, 1999, 6:15 PM CST
- In force
- 75 min
- Issued by
- NWS Austin/San Antonio, TX
- Area
- Whole counties
County Travis County, TX
The radar
The Ft Hood radar (KGRK), 58 km from the middle of the area, began a volume at 23:08 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 12:00Z, 11.0 hours before the alert went out and 281 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
- 0 J/kg
- Mixed-layer CIN
- No buoyant parcel
- Mixed-layer LCL
- 524 m above ground
- 0-6 km bulk shear
- 49 kt
- 0-1 km storm-relative helicity
- 514 m²/s²
- 0-3 km storm-relative helicity
- 542 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
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 Austin/San Antonio, TX wrote its last area forecast discussion before this severe thunderstorm warning went out at Dec 31, 7:40 PM CST, 21 hours 20 minutes earlier.
Area forecast discussion, Dec 31, 7:40 PM CST, 21 hours 20 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, 5:44 PM CST | Severe Thunderstorm Warning | EWX | Bexar, Comal, Guadalupe | 91 min |
| Jan 1, 5:44 PM CST | Severe Thunderstorm Warning | EWX | Caldwell, Hays | 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; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.