Alert archive / Texas / Flash Flood Warnings in 1999
Flash Flood Warning 47, NWS Austin/San Antonio, TX
NWS Austin/San Antonio, TX issued this flash flood warning at Jun 13, 1999, 9:04 PM CDT for Atascosa County, Texas. It was in force for 116 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
- Jun 13, 1999, 9:04 PM CDT (02:04 UTC)
- Expired
- Jun 13, 1999, 11:00 PM CDT
- In force
- 116 min
- Issued by
- NWS Austin/San Antonio, TX
- Area
- Whole counties
County Atascosa County, TX
The radar
The Austin/San Antonio radar (KEWX), 102 km from the middle of the area, began a volume at 02:08 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
Corpus Christi, TX (KCRP), launched 00:00Z, 2.1 hours before the alert went out and 174 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
- 2756 J/kg
- Mixed-layer CIN
- -19 J/kg
- Mixed-layer LCL
- 893 m above ground
- 0-6 km bulk shear
- 18 kt
- 0-1 km storm-relative helicity
- 10 m²/s²
- 0-3 km storm-relative helicity
- 29 m²/s²
- Significant tornado parameter
- 0.2
- Supercell composite
- 1.2
The text
As transmitted, in the capitals the NWS used until 2016.
000 TTAA00 KEWX 140205 FFWSAT TXC013-140400- BULLETIN - EAS ACTIVATION REQUESTED FLASH FLOOD WARNING NATIONAL WEATHER SERVICE AUSTIN/SAN ANTONIO TX 904 PM CDT SUN JUN 13 1999 THE NATIONAL WEATHER SERVICE IN AUSTIN/SAN ANTONIO HAS ISSUED A * FLASH FLOOD WARNING FOR THE FOLLOWING... ATASCOSA COUNTY IN TEXAS * UNTIL 1100 PM CDT * AT 900 PM DOPPLER RADAR ESTIMATED BETWEEN 2 TO 4 INCHES OF RAIN HAD FALLEN OVER SOUTHERN ATASCOSA IN ASSOCIATION WITH STRONG THUNDERSTORMS THAT WERE BUILDING NORTHWARD. THESE HEAVY RAINS WILL LIKELY PRODUCE FLASH FLOOD CONDITIONS IN SOUTHERN ATASCOSA OVER THE NEXT HOUR AND WILL SHIFT NORTHWARD OVER THE NEXT TWO HOURS. EXCESSIVE RUNOFF FROM THESE STORMS WILL CAUSE FLASH FLOODING OF SMALL CREEKS AND STREAMS...COUNTRY ROADS...NORMALLY DRY WASHES AND ARROYOS...AS WELL AS FARMLAND ALONG THE BANKS OF CREEKS AND STREAMS. BE ESPECIALLY CAUTIOUS AT NIGHT WHEN IT IS HARDER TO RECOGNIZE THE DANGERS OF FLOODS AND FLASH FLOODS. IF FLASH FLOODING IS OBSERVED ACT QUICKLY. MOVE UP TO HIGHER GROUND TO ESCAPE FLOOD WATERS. DO NOT STAY IN AREAS SUBJECT TO FLOODING WHEN WATER BEGINS RISING.
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, Jun 13, 7:39 PM CDT, 1 hour 25 minutes before
TXZ187-189-204>206-140130- SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE AUSTIN/SAN ANTONIO TX 739 PM CDT SUN JUN 13 1999 A BAND OF SHOWERS AND THUNDERSTORMS FROM NEW BRAUNFELS TO LEON SPRINGS TO MEDINA LAKE WILL CONTINUE TO MOVE SOUTHWARD NEAR 20 MPH. ALTHOUGH NONE OF THE STORMS ARE SEVERE...THEY WILL PRODUCE BRIEF HEAVY RAIN AND GUSTY WINDS. RAINFALL RATES AS HIGH AS ONE TO TWO INCHES PER HOUR ARE POSSIBLE...CAUSING SOME BRIEF LOCALIZED STREET FLOODING. THESE STORMS WILL CONTINUE SOUTHWARD TOWARDS NORTH SAN ANTONIO AND HONDO WITHIN THE HOUR. CAMPERS...BOATERS AND OTHERS INVOLVED IN OUTDOOR ACTIVITIES SHOULD BE READY TO SEEK SAFE SHELTER IF A THUNDERSTORM THREATENS. MOTORISTS SHOULD ALSO USE EXTRA CAUTION.
Special weather statement, Jun 13, 7:39 PM CDT, 1 hour 25 minutes before
TXZ187-189-204>206-140130- SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE AUSTIN/SAN ANTONIO TX 739 PM CDT SUN JUN 13 1999 A BAND OF SHOWERS AND THUNDERSTORMS FROM NEW BRAUNFELS TO LEON SPRINGS TO MEDINA LAKE WILL CONTINUE TO MOVE SOUTHWARD NEAR 20 MPH. ALTHOUGH NONE OF THE STORMS ARE SEVERE...THEY WILL PRODUCE BRIEF HEAVY RAIN AND GUSTY WINDS. RAINFALL RATES AS HIGH AS ONE TO TWO INCHES PER HOUR ARE POSSIBLE...CAUSING SOME BRIEF LOCALIZED STREET FLOODING. THESE STORMS WILL CONTINUE SOUTHWARD TOWARDS NORTH SAN ANTONIO AND HONDO WITHIN THE HOUR. CAMPERS...BOATERS AND OTHERS INVOLVED IN OUTDOOR ACTIVITIES SHOULD BE READY TO SEEK SAFE SHELTER IF A THUNDERSTORM THREATENS. MOTORISTS SHOULD ALSO USE EXTRA CAUTION.
Special weather statement, Jun 13, 8:53 PM CDT, 11 minutes before
TXZ205-220>222-140245- SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE AUSTIN/SAN ANTONIO TX 853 PM CDT SUN JUN 13 1999 A CLUSTER OF SHOWERS AND STRONG THUNDERSTORMS WITH VERY HEAVY RAIN CONTINUED OVER ATASCOSA COUNTY BETWEEN FALLS CITY...CHRISTINE AND CHOKE CANYON LAKE. THESE STORMS SHOWED VERY LITTLE MOVEMENT WITH RAINFALL RATES FROM ONE TO THREE INCHES PER HOUR. THE HEAVY RAINS WILL CAUSE SOME BRIEF MINOR STREET FLOODING AND MOTORISTS ARE URGED TO USE EXTRA CAUTION. THESE STORMS SHOULD BEGIN TO DISSIPATE WITHIN THE NEXT HOUR...HOWEVER A FLASH FLOOD WARNING MAY BE REQUIRED FOR SOUTHERN ATASCOSA COUNTY SHOULD THESE STORMS PERSIST FOR MUCH LONGER.
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.