Alert archive / Texas / Flash Flood Warnings in 2002
Flash Flood Warning 40, NWS San Angelo, TX
NWS San Angelo, TX issued this flash flood warning at Jul 4, 2002, 6:43 PM CDT for Tom Green County, Texas. It was in force for 3 hr. 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 4, 2002, 6:43 PM CDT (23:43 UTC)
- Expired
- Jul 4, 2002, 9:30 PM CDT
- In force
- 3 hr
- Issued by
- NWS San Angelo, TX
- Area
- Counties, with a storm outline in the text
County Tom Green 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
Midland Regional, TX (KMAF), launched 12:00Z, 11.7 hours before the alert went out and 153 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
- 262 J/kg
- Mixed-layer CIN
- -173 J/kg
- Mixed-layer LCL
- 896 m above ground
- 0-6 km bulk shear
- 25 kt
- 0-1 km storm-relative helicity
- 16 m²/s²
- 0-3 km storm-relative helicity
- 95 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.1
The text
As transmitted, in the capitals the NWS used until 2016.
000
WGUS54 KSJT 042343
FFWSJT
TXC451-050230-
BULLETIN - EAS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE SAN ANGELO TX
642 PM CDT THU JUL 4 2002
THE NATIONAL WEATHER SERVICE HAS ISSUED A
* FLASH FLOOD WARNING FOR...
TOM GREEN COUNTY IN SOUTHWEST TEXAS
* UNTIL 930 PM CDT
* AT 640 PM CDT...WEATHER SERVICE DOPPLER RADAR INDICATED VERY HEAVY
RAIN OVER WATER VALLEY...OR ABOUT 22 MILES NORTHWEST OF SAN
ANGELO...MOVING SOUTHEAST AT 5 MPH. THIS HEAVY RAIN
PRODUCING THUNDERSTORM WILL REACH CARLSBAD BY 700 PM AND GRAPE
CREEK BY 715 PM.
* DOPPLER RADAR ESTIMATES INDICATED 1 TO 2 INCHES OF RAIN HAS FALLEN
IN NORTHWEST TOM GREEN COUNTY NEAR WATER VALLEY SINCE 530 PM.
ANOTHER 1 TO 2 INCHES OF RAINFALL IS LIKELY BY 830 PM. MOTORISTS
TRAVELING NORTHBOUND ON US HIGHWAY 87...AND RANCH ROAD 2034
SHOULD BE EXTREMELY CAUTIOUS WHEN APPROACHING LOW WATER
CROSSINGS.
EXCESSIVE RUNOFF FROM THIS STORM WILL CAUSE FLASH FLOODING OF SMALL
CREEKS AND STREAMS...AS WELL AS OTHER DRAINAGE AREAS AND LOW LYING
SPOTS.
LAT...LON 3169 10084 3158 10082 3153 10028 3168 10027
3169 100673 follow-up statements
000 WGUS74 KSJT 050029 FFSSJT TXC451-050230- FLASH FLOOD STATEMENT NATIONAL WEATHER SERVICE SAN ANGELO TX 728 PM CDT THU JUL 4 2002 ...A FLASH FLOOD WARNING REMAINS IN EFFECT FOR TOM GREEN COUNTY UNTIL 930 PM CDT... AT 726 PM...WEATHER SERVICE RADAR SHOWED A HEAVY RAIN PRODUCING THUNDERSTORM ALONG US HIGHWAY 87 BETWEEN CARLSBAD AND WATER VALLEY. THIS STORM IS MOVING SOUTHWARD AT 5 MPH. NEW DEVELOPMENT COULD OCCUR BETWEEN ARDEN AND SAN ANGELO ALONG AN OUTFLOW BOUNDARY WITHIN THE HOUR. AT 720 PM...A NATIONAL WEATHER SERVICE EMPLOYEE IN WATER VALLEY REPORTED 2 1/2 INCHES OF RAINFALL IN 40 MINUTES. MOST DEATHS IN FLASH FLOODING OCCUR IN AUTOMOBILES. DO NOT ATTEMPT TO CROSS BRIDGES...DIPS...OR LOW SPOTS IF WATER COVERS THE ROADWAY. NEVER TRY TO CROSS A FLOWING STREAM...EVEN A SMALL ONE...ON FOOT.
000 WGUS74 KSJT 050103 FFSSJT TXC451-050230- FLASH FLOOD STATEMENT NATIONAL WEATHER SERVICE SAN ANGELO TX 802 PM CDT THU JUL 4 2002 ...A FLASH FLOOD WARNING REMAINS IN EFFECT FOR TOM GREEN COUNTY UNTIL 930 PM CDT... AT 800 PM...WEATHER SERVICE RADAR INDICATED HEAVY RAIN PRODUCING THUNDERSTORMS FROM DOWNTOWN SAN ANGELO TO GRAPE CREEK. THE THUNDERSTORMS ARE DEVELOPING...DRIFTING SLOWLY SOUTHWARD AT 5 MPH. THESE THUNDERSTORMS ARE CAPABLE OF PRODUCING HOURLY RAINFALL RATES OF 2 TO 3 INCHES. MOST DEATHS IN FLASH FLOODING OCCUR IN AUTOMOBILES. DO NOT ATTEMPT TO CROSS BRIDGES...DIPS...OR LOW SPOTS IF WATER COVERS THE ROADWAY. NEVER TRY TO CROSS A FLOWING STREAM...EVEN A SMALL ONE...ON FOOT.
000 WGUS74 KSJT 050205 FFSSJT TXC451-050215- FLASH FLOOD STATEMENT NATIONAL WEATHER SERVICE SAN ANGELO TX 904 PM CDT THU JUL 4 2002 ...THE NATIONAL WEATHER SERVICE IN SAN ANGELO HAS CANCELLED THE FLASH FLOOD WARNING FOR TOM GREEN COUNTY... ONLY LIGHT RAIN IS EXPECTED OVER TOM GREEN COUNTY THROUGH 930 PM. THE THREAT OF FLOODING HAS ENDED...THEREFORE THE FLASH FLOOD WARNING FOR TOM GREEN COUNTY HAS BEEN CANCELLED.
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 San Angelo, TX wrote its last area forecast discussion before this flash flood warning went out at Jul 4, 3:41 PM CDT, 3 hours 2 minutes earlier.
Area forecast discussion, Jul 4, 3:41 PM CDT, 3 hours 2 minutes before
WEST CENTRAL TEXAS FORECAST DISCUSSION...CORRECTED CCF NUMBERS NATIONAL WEATHER SERVICE SAN ANGELO TX 341 PM CDT THU JUL 4 2002 NUMEROUS SHOWERS AND A FEW THUNDERSTORMS OCCURING IN NORTH-CENTRAL AND EASTERN PARTS OF OUR CWFA THIS AFTERNOON...IN ASSOCIATION WITH MID/ UPPER LEVEL SHEAR AXIS ORIENTED NNW TO SSE AND BISECTING OUR CWFA. BASED ON RADAR AND VISIBLE SATELLITE SIGNATURES...APPEARS THAT A FEW VORTICITY MAXIMA ARE EMBEDDED ALONG THE SHEAR AXIS. THIS SHAR AXIS TO MOVE VERY LITTLE TONIGHT. WITH ABUNDANT MOISTURE STILL IN PLACE...THE SETUP FAVORS HEAVY RAINFALL POTENTIAL FOR MUCH OF THE NORTHEASTERN HALF OF OUR CWFA. SOME OF OUR HEARTLAND AND NW HILL COUNTRY COUNTIES HAVE RECEIVED THE GREATEST PREVIOUS RAINFALL...HAVE SATURATED GROUND AND WOULD BE MORE PRONE TO FLASH FLOODING. BASED ON THESE FACTORS AND RADAR TRENDS...PLAN TO CARRY A FLASH FLOOD WATCH ONCE AGAIN TONIGHT FOR HEARTLAND AND NW HILL COUNTRY COUNTIES. WILL MENTION LOCALLY HEAVY RAINFALL IN ALL OF OUR ZONES TONIGHT. SHEAR AXIS TO SHIFT SLOWLY WESTWARD AND WEAKEN FRIDAY THROUGH SATURDAY. WITH THIS TREND...WILL CARRY CHANCE POPS FRIDAY FOR OUR COUNTIES. WILL NEED TO ADD A LOW POP SATURDAY...WITH THE BEST CHANCE IN OUR WESTERN COUNTIES. AS SHEAR AXIS WEAKENS EXPECT TO SEE MORE BREAKS IN THE CLOUDCOVER NEXT COUPLE OF DAYS...ALLOWING FOR WARMER DAYTIME TEMPERATURES. ALTHOUGH RESIDUAL MOISTURE LINGERS INTO SUNDAY AND A COUPLE OF SHOWERS/THUNDERSTORMS NOT OUT OF THE QUESTION...THE PROSPECTS APPEAR TOO MARGINAL AT THIS POINT TO SHOTGUN WITH LOW POPS...SO WILL LEAVE SUNDAY DRY. FIRST HALF OF NEXT WEEK...UPPER HIGH PROGGED TO BUILD OVER THE ROCKIES WITH OUR REGION SITUATED IN ITS SOUTHEASTERN PERIPHERY. THIS WOULD FAVOR LESS CLOUDS AND WARMER TEMPS FOR OUR AREA. CURRENT WORDING OF EXTENDED FORECAST LOOKS GOOD AT THIS TIME...AND NO SIGNIFICANT CHANGES PLANNED. ABI EB 071/083 071/088 072 19853 SJT EB 070/085 071/088 072 19543 JCT EB 070/081 071/089 071 19853= .SJT...FLASH FLOOD WATCH TONIGHT FOR MASON...MENARD...KIMBLE... MCCULLOCH...SAN SABA...BROWN...COLEMAN COUNTIES. 19
In the hours before
Special weather statement, Jul 4, 2:24 PM CDT, 4 hours 19 minutes before
TXZ049-054-064>066-071>073-076>078-098-099-113-114-127-128-139-140- 154-155-168>170-042315- WEST CENTRAL TEXAS HAZARDOUS WEATHER OUTLOOK NATIONAL WEATHER SERVICE SAN ANGELO TX 224 PM CDT THU JUL 4 2002 ...THUNDERSTORMS WITH HEAVY RAINFALL TO CONTINUE ACROSS PORTIONS OF WEST CENTRAL TEXAS THROUGH TONIGHT... A WEAK UPPER LEVEL DISTURBANCE WILL CONTINUE TO INTERACT WITH A VERY MOIST AIR MASS TO PRODUCE SHOWERS AND THUNDERSTORMS ACROSS WEST CENTRAL TEXAS. THESE STORMS WILL MOVE ONLY VERY SLOWLY AND WILL PRODUCE RAINFALL RATES OF 1 TO 2 INCHES PER HOUR. WITH THE GROUND SATURATED FROM PREVIOUS RAINS...ANY ADDITIONAL RAINFALL WILL QUICKLY RUN OFF INTO CREEKS AND STREAMS...PERHAPS CAUSING THEM TO CLIMB OUT OF THEIR BANKS. ALTHOUGH SHOWER AND THUNDERSTORM ACTIVITY WILL CONTINUE THROUGH THE AFTERNOON AND INTO THE EVENING HOURS...MUCH OF THIS ACTIVITY WILL DISSIPATE AFTER SUNRISE. HOWEVER...AS HAS BEEN THE CASE IN PREVIOUS NIGHTS...EVEN HEAVIER RAINFALL WILL LIKELY REDEVELOP DURING THE EARLY MORNING HOURS AND CONTINUE THROUGH SUNRISE FRIDAY MORNING. SPOTTER ACTIVATION IS NOT ANTICIPATED. ADDITIONAL INFORMATION PLEASE SEE STATEMENTS AND OUTLOOKS FROM NATIONAL WEATHER SERVICE OFFICES ACROSS TEXAS...OKLAHOMA...AND NEW MEXICO. 07
The office that day
Everything else NWS San Angelo, TX issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jul 4, 12:04 AM CDT | Flash Flood Warning | SJT | Brown, Coleman | 6 hr |
| Jul 4, 7:47 AM CDT | Flash Flood Warning | SJT | Sutton | 3 hr |
| Jul 4, 5:40 PM CDT | Flash Flood Warning | SJT | Coke | 3 hr |
| Jul 4, 5:43 PM CDT | Flash Flood Warning | SJT | Coke | 3 hr |
| Jul 4, 6:02 PM CDT | Flash Flood Warning | SJT | Sterling | 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.