Alert archive / Texas / Flash Flood Warnings in 2002
Flash Flood Warning 184, NWS Austin/San Antonio, TX
NWS Austin/San Antonio, TX issued this flash flood warning at Jul 17, 2002, 1:25 PM CDT for Comal County, Texas. It was in force for 110 min. No storm report in the archive falls inside the area while it was in force.
The area
The outline as issued.
The facts
- Issued
- Jul 17, 2002, 1:25 PM CDT (18:25 UTC)
- Expired
- Jul 17, 2002, 3:15 PM CDT
- In force
- 110 min
- Issued by
- NWS Austin/San Antonio, TX
- Area
- Counties, with a storm outline in the text
County Comal County, TX
Did it verify
Not verified. The Iowa Environmental Mesonet's Cow found no qualifying storm report inside this flash flood warning while it was in force. That is not proof nothing happened: reports are thin where few people live.
Cow counts a report within 15 km of the polygon while the warning was in force: a tornado for a tornado warning; hail of 1 inch or more, a gust of 58 mph or more or wind damage for a severe thunderstorm warning; a flash flood report for a flash flood warning.
The nearest sounding before it
Corpus Christi, TX (KCRP), launched 12:00Z, 6.4 hours before the alert went out and 241 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
- 2554 J/kg
- Mixed-layer CIN
- -2 J/kg
- Mixed-layer LCL
- 559 m above ground
- 0-6 km bulk shear
- 9 kt
- 0-1 km storm-relative helicity
- -46 m²/s²
- 0-3 km storm-relative helicity
- -7 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted, in the capitals the NWS used until 2016.
000 WGUS54 KEWX 171825 FFWSAT TXC091-172015- BULLETIN - EAS ACTIVATION REQUESTED FLASH FLOOD WARNING NATIONAL WEATHER SERVICE AUSTIN/SAN ANTONIO TX 125 PM CDT WED JUL 17 2002 THE NATIONAL WEATHER SERVICE IN AUSTIN SAN ANTONIO HAS ISSUED A * FLASH FLOOD WARNING FOR THE FOLLOWING COUNTIES... COMAL * UNTIL 315 PM CDT * AT 125 PM...WEATHER SERVICE DOPPLER RADAR INDICATED A BAND OF THUNDERSTORMS...WITH VERY HEAVY RAIN...MOVING NORTHWEST AT 20 MPH ACROSS COMAL COUNTY. THESE STORMS WILL LIKELY PRODUCE BETWEEN 1 AND 2 INCHES OF RAIN ACROSS PARTS OF COMAL COUNTY. THESE HEAVY RAINFALL AMOUNTS WILL PRODUCE FLASH FLOODING. EXCESSIVE RUNOFF FROM THIS STORM WILL CAUSE FLASH FLOODING OF SMALL CREEKS AND STREAMS...HIGHWAYS AND UNDERPASSES. MANY STREAMS ARE ALREADY NEAR CAPACITY AND WILL QUICKLY RISE OUT OF BANKS WITH THE ADDED RAINFALL. A FLASH FLOOD WARNING MEANS THAT FLOODING IS OCCURRING OR IS IMMINENT. MOST FLASH FLOOD DEATHS OCCUR IN AUTOMOBILES. DO NOT ATTEMPT TO CROSS BRIDGES...DIPS...OR OTHER LOW SPOTS IF WATER COVERS THE ROADWAY. NEVER TRY TO CROSS A FLOWING STREAM...EVEN A SMALL ONE...ON FOOT. TO ESCAPE RISING WATER MOVE UP TO HIGHER GROUND. LAT...LON 2957 9827 2972 9814 2995 9825 2985 9848
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 Jul 17, 9:30 AM CDT, 3 hours 55 minutes earlier.
Area forecast discussion, Jul 17, 9:30 AM CDT, 3 hours 55 minutes before
SOUTH CENTRAL TEXAS FORECAST DISCUSSION NATIONAL WEATHER SERVICE AUSTIN/SAN ANTONIO TX 930 AM CDT WED JUL 17 2002 CURRENT WEATHER ANALYSIS... A SURFACE RIDGE OVER THE NORTHERN GULF CONTINUES TO DOMINATE SOUTH TEXAS WEATHER WITH EAST TO SOUTHEAST WINDS PREVAILING. UPPER LEVEL TROUGH OVER THE REGION WILL CONTINUE TO BE A FOCUS FOR THE ONGOING CONVECTIVE WEATHER. OUTLOOK... LOOK FOR UPPER LEVEL TROUGH TO SLIDE NORTH TO NORTHWEST OVER THE NEXT 24 TO 48 HOURS. SURFACE RIDGE TO REMAIN A DOMINATE FOCUS WITH CONTINUES GULF INFLOW INTO THE SOUTH CENTRAL TEXAS AND HILL COUNTRY FORECAST WARNING AREA. MODEL GUIDANCE PRECIPITABLE WATER GIVES THE REGION 1.5 TO 2.8 INCHES OVER THE NEXT 24 HOURS. IR/WV SATELLITE LOOP HAS YET ANOTHER SHORTWAVE COMING ONSHORE AROUND MIDDAY TODAY. CONSIDERING ALL OF THE ABOVE...WILL CONTINUE PRECIPITATION AND CLOUDINESS TRENDS. WILL UPDATE THE 4AM ZONE FORECAST... ADJUSTING FOR ONGOING WEATHER. WILL RE-ISSUE FORECAST SHORTLY. PREVIOUS DISCUSSION.... FINALLY A QUIET NIGHT ACROSS SCNTRL TX AND AN IMPENDING CHANGE IN THE FORECAST THE MAIN FORECAST ISSUES ARE THE NEED FOR AN FFA TODAY AND POPS THROUGH DAY 7. THE 00Z NCEP MODELS ARE IN FAIR AGREEMENT. PREFER THE AVN AS BETTER VERIFYING WITH CURRENT ACTIVITY AND MORE REALISTIC THAN TOO WET ETA AND TOO DRY NGM. SIMILARLY...PREFER MAV TEMPS/POPS. WILL BLEND EXTENDED GUIDANCE AND LEAN TOWARD 00Z CANADIAN/12Z 7/16 NOGAPS...BUT WILL CHECK 00Z NOGAPS AND MRF BEFORE FINAL DECISIONS. THE 00Z FWD/LCH/DRT/BRO RAOBS STILL SHOW HIGH PW...BUT LESS THAN TWO STANDARD DEVIATIONS ABOVE NORMAL...WHICH SEEMS TO BE A CRITICAL LEVEL FOR HEAVY RAIN. CRP IS STILL NEAR 2 STD ABOVE NORMAL. FYI...THE OLD UPPER AIR DATA FROM SAT INDICATES A CRITICAL PW OF 2.00 FOR HEAVY RAIN OVER CNTRL SECTIONS OF THE CWA. WERE LEANING TOWARD NO FFA...BUT WILL DECIDE AT POST TIME. OTHERWISE...ALL MODELS DEPICT THE SHEAR AXIS SLIDING WEST...WITH THE SFC HIGH...THEN UPPER LEVEL RIDGE...BUILDING OVER TX BY LATE WEEK. CANT GET TOO EXCITED FOR DRYING THROUGH...AS SEA BREEZE SHOULD HAVE IDEAL CONDITIONS FOR THE WEEKEND...FOLLOWED BY TROPICAL WAVES IN THE INCREASINGLY ACTIVE ATLANTIC MONSOON TROUGH. SO WILL RETAIN POPS IN THE EXTENDED PERIOD...BUT LOWER TO SLIGHT CHANCE AND TREND TOWARD POSSIBLY DRIER IN LATER PACKAGES. PRELIMINARY NUMBERS AUS 88/74/92/74/94 52211 DRT 89/74/91/75/95 43321 SAT 88/75/92/76/94 53211 .EWX...NONE.
The office that day
Everything else NWS Austin/San Antonio, TX issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jul 16, 7:01 PM CDT | Flash Flood Warning | EWX | Caldwell, Comal, Hays | 3 hr |
| Jul 17, 12:09 PM CDT | Flash Flood Warning | EWX | Caldwell, Guadalupe, Hays, Travis | 3 hr |
| Jul 17, 12:45 PM CDT | Flash Flood Warning | EWX | Williamson | 2 hr |
| Jul 17, 2:22 PM CDT | Flash Flood Warning | EWX | Bexar, Blanco, Kendall | 3 hr |
| Jul 17, 3:11 PM CDT | Flash Flood Warning | EWX | Bandera, Medina | 109 min |
| Jul 17, 5:04 PM CDT | Flash Flood Warning | EWX | Bexar, Kendall | 3 hr |
| Jul 17, 5:24 PM CDT | Flash Flood Warning | EWX | Comal | 3 hr |
Nearby
Flash Flood Warnings in Texas, 2002Every flash flood warning in 2002
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.