Alert archive / Texas / Flash Flood Warnings in 1999

Flash Flood Warning 1, NWS Austin/San Antonio, TX

January 1, 1999Travis County, Williamson County, Texas

NWS Austin/San Antonio, TX issued this flash flood warning at Jan 1, 1999, 5:54 PM CST for Travis County, Williamson County, Texas. It was in force for 2 hr. 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, 5:54 PM CST (23:54 UTC)
Expired: Jan 1, 1999, 7:55 PM CST
In force: 2 hr
Issued by: NWS Austin/San Antonio, TX
Area: Whole counties

Counties Travis County, TX, Williamson County, TX

The radar

The Ft Hood radar (KGRK), 39 km from the middle of the area, began a volume at 23:55 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, 11.9 hours before the alert went out and 263 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-p

Temperature in red, dew point in green, the mixed-layer parcel dashed.

Hodograph

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: 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

Open this sounding in Storm Lab

The text

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

000 
TTAA00 KSAT 012354
FFWSAT
TXC453-491-020155-

BULLETIN - EAS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE AUSTIN/SAN ANTONIO TX
554 PM CST FRI JAN 1 1999

THE NATIONAL WEATHER SERVICE IN AUSTIN/SAN ANTONIO HAS ISSUED A

* FLASH FLOOD WARNING FOR...
  EASTERN WILLIAMSON IN TEXAS
  EASTERN TRAVIS IN TEXAS

* UNTIL 755 PM CST

* AT AT 550 PM CST... NATIONAL WEATHER SERVICE DOPPLER RADAR
  INDICATED A LINE OF THUNDERSTORM WITH VERY HEAVY RAIN OVER EASTERN
  TRAVIS AND EASTERN WILLIAMSON COUNTIES... MOVING NORTHEAST NEAR
  30 MPH.

* VERY HEAVY RAIN WITH RATES OF 1 TO 2 INCHES AN HOUR FOR THE NEXT
  ONE TO TWO HOURS OVER EASTERN TRAVIS AND WILLIAMSON COUNTIES WILL
  CAUSE FLOODING OF CREEKS AND LOW WATER CROSSINGS.

BE ESPECIALLY CAUTIOUS AT NIGHT WHEN IT IS HARDER TO RECOGNIZE THE
DANGER OF FLOODING.

JDS

What forecasters said that day

The local office's own words before this flash flood 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 flash flood warning went out at Dec 31, 7:40 PM CST, 22 hours 14 minutes earlier.

Area forecast discussion, Dec 31, 7:40 PM CST, 22 hours 14 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, 5:44 PM CST	Severe Thunderstorm Warning	EWX	Caldwell, Hays	91 min

Nearby

Flash Flood Warnings in Texas, 1999 Every flash flood 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.