Alert archive / Texas / Flash Flood Warnings in 1999
Flash Flood Warning 94, NWS Austin/San Antonio, TX
NWS Austin/San Antonio, TX issued this flash flood warning at Jul 12, 1999, 5:49 PM CDT for 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
- Jul 12, 1999, 5:49 PM CDT (22:49 UTC)
- Expired
- Jul 12, 1999, 8:00 PM CDT
- In force
- 2 hr
- Issued by
- NWS Austin/San Antonio, TX
- Area
- Whole counties
County Williamson County, TX
The radar
The Ft Hood radar (KGRK), 22 km from the middle of the area, began a volume at 22:49 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, 10.8 hours before the alert went out and 245 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
- 25 J/kg
- Mixed-layer CIN
- -65 J/kg
- Mixed-layer LCL
- 1072 m above ground
- 0-6 km bulk shear
- 15 kt
- 0-1 km storm-relative helicity
- -17 m²/s²
- 0-3 km storm-relative helicity
- 66 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted, in the capitals the NWS used until 2016.
000 TTAA00 KEWX 122311 COR FFWSAT TXC491-130100- BULLETIN - EAS ACTIVATION REQUESTED FLASH FLOOD WARNING NATIONAL WEATHER SERVICE AUSTIN/SAN ANTONIO TX 549 PM CDT MON JUL 12 1999 THE NATIONAL WEATHER SERVICE IN AUSTIN/SAN ANTONIO HAS ISSUED A * FLASH FLOOD WARNING FOR THE FOLLOWING COUNTIES IN TEXAS... WILLIAMSON COUNTY * UNTIL 800 PM CDT *NATIONAL WEATHER SERVICE DOOPLER RADAR INDICATE A CLUSTER OF THUNDERSTORMS PRODUCING RAINFALL AT A RATE OF OVER 1 INCH AN HOUR ACROSS SOUTHERN WILLIAMSON COUNTY. THESE SHOWERS AND THUNDERSTORMS ARE MOVING NORTH THROUGH THE COUNTY AT 15 MPH. AN OBSERVER 3 MILES NORTH OF LEANDER RECEIVED OVER 3 INCHES OF RAIN SINCE THIS MORNING. A FLASH FLOOD WARNING MEANS THAT FLOODING IS IMMINENT OR OCCURRING. IF YOU ARE IN THE WARNING AREA MOVE TO HIGHER GROUND IMMEDIATELY. RESIDENTS LIVING ALONG STREAMS AND CREEKS SHOULD TAKE IMMEDIATE PRECAUTIONS TO PROTECT LIFE AND PROPERTY. CAMPERS SHOULD AVOID CAMPING ALONG STREAMS OR CREEKS DURING THREATENING RAINS.DO NOT ATTEMPT TO CROSS SWIFTLY FLOWING WATERS OR WATERS OF UNKNOWN DEPTH BY FOOT OR BY AUTOMOBILE. IF YOUR VEHICLE STALLS, ABANDON IT IMMEDIATELY AND SEEK HIGHER GROUND.
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.
In the hours before
Special weather statement, Jul 12, 3:15 PM CDT, 2 hours 34 minutes before
TXZ171>173-183>194-202>209-217>225-228-131400- SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE AUSTIN/SAN ANTONIO TX 315 PM CDT MON JUL 12 1999 ...HEAVY RAINFALL IS EXPECTED TO RETURN OVER THE HILL COUNTRY AND PARTS OF SOUTH CENTRAL TEXAS BY TUESDAY MORNING... AN UPPER LEVEL DISTURBANCE WILL MOVE SOUTH INTO CENTRAL TEXAS LATE TONIGHT AND PROVIDE A FOCUS FOR HEAVY RAINFALL OVER THE HILL COUNTRY AND NORTHERN PORTIONS OF SOUTH CENTRAL TEXAS BY EARLY TUESDAY MORNING. LOCALLY HEAVY RAINFALL CAN BE EXPECTED IN THE NORTHERNMOST PORTIONS OF THE HILL COUNTRY THIS EVENING AS SHOWERS AND THUNDERSTORMS WILL REMAIN FOCUSED ALONG AND 30 MILES EITHER SIDE OF AN OZONA TO TEMPLE LINE THIS EVENING. THE FOCUS FOR HEAVY RAINFALL WILL GRADUALLY MOVE SOUTH INTO THE REST OF THE HILL COUNTRY AND PARTS OF SOUTH CENTRAL TEXAS EARLY TUESDAY MORNING WITH LOCALLY HEAVY RAINFALL AMOUNTS OF 1 TO 2 INCHES POSSIBLE BY MIDDAY TUESDAY. THE GROUNDS OVER MOST OF THE HILL COUNTRY REMAIN NEARLY SATURATED...SO THESE HEAVY RAINFALL AMOUNTS COULD PRODUCE LOCALIZED FLOODING. THIS FOCUS FOR SHOWERS AND THUNDERSTORMS WILL CONTINUE TO SHIFT SOUTHWARD ACROSS SOUTH CENTRAL TEXAS LATE TUESDAY. THOSE WITH INTERESTS IN THE HILL COUNTRY AND AREAS NORTH OF AUSTIN TONIGHT SHOULD MONITOR THE LOCAL MEDIA OUTLETS FOR ADDITIONAL WEATHER STATEMENTS AND POSSIBLE WATCHES OR WARNINGS.
Special weather statement, Jul 12, 3:15 PM CDT, 2 hours 34 minutes before
TXZ171>173-183>194-202>209-217>225-228-131400- SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE AUSTIN/SAN ANTONIO TX 315 PM CDT MON JUL 12 1999 ...HEAVY RAINFALL IS EXPECTED TO RETURN OVER THE HILL COUNTRY AND PARTS OF SOUTH CENTRAL TEXAS BY TUESDAY MORNING... AN UPPER LEVEL DISTURBANCE WILL MOVE SOUTH INTO CENTRAL TEXAS LATE TONIGHT AND PROVIDE A FOCUS FOR HEAVY RAINFALL OVER THE HILL COUNTRY AND NORTHERN PORTIONS OF SOUTH CENTRAL TEXAS BY EARLY TUESDAY MORNING. LOCALLY HEAVY RAINFALL CAN BE EXPECTED IN THE NORTHERNMOST PORTIONS OF THE HILL COUNTRY THIS EVENING AS SHOWERS AND THUNDERSTORMS WILL REMAIN FOCUSED ALONG AND 30 MILES EITHER SIDE OF AN OZONA TO TEMPLE LINE THIS EVENING. THE FOCUS FOR HEAVY RAINFALL WILL GRADUALLY MOVE SOUTH INTO THE REST OF THE HILL COUNTRY AND PARTS OF SOUTH CENTRAL TEXAS EARLY TUESDAY MORNING WITH LOCALLY HEAVY RAINFALL AMOUNTS OF 1 TO 2 INCHES POSSIBLE BY MIDDAY TUESDAY. THE GROUNDS OVER MOST OF THE HILL COUNTRY REMAIN NEARLY SATURATED...SO THESE HEAVY RAINFALL AMOUNTS COULD PRODUCE LOCALIZED FLOODING. THIS FOCUS FOR SHOWERS AND THUNDERSTORMS WILL CONTINUE TO SHIFT SOUTHWARD ACROSS SOUTH CENTRAL TEXAS LATE TUESDAY. THOSE WITH INTERESTS IN THE HILL COUNTRY AND AREAS NORTH OF AUSTIN TONIGHT SHOULD MONITOR THE LOCAL MEDIA OUTLETS FOR ADDITIONAL WEATHER STATEMENTS AND POSSIBLE WATCHES OR WARNINGS.
The office that day
Everything else NWS Austin/San Antonio, TX issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jul 12, 5:22 PM CDT | Flash Flood Warning | EWX | Llano | 2 hr |
Nearby
Flash Flood Warnings in Texas, 1999Every 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.