Alert archive / Texas / Flash Flood Warnings in 1990
Flash Flood Warning 47, NWS Fort Worth, TX
NWS Fort Worth, TX issued this flash flood warning at Apr 20, 1990, 6:22 PM CDT for Denton County, Texas. It was in force for 4 hr.
The area
The counties it named.
The facts
- Issued
- Apr 20, 1990, 6:22 PM CDT (23:22 UTC)
- Expired
- Apr 20, 1990, 10:30 PM CDT
- In force
- 4 hr
- Issued by
- NWS Fort Worth, TX
- Area
- Whole counties
County Denton County, TX
The radar
The WSR-88D network and its archive begin in 1991, so there is no radar volume for this alert.
The nearest sounding before it
Stephenville/Cla, TX (KSEP), launched 12:00Z, 11.4 hours before the alert went out and 143 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
- 1162 J/kg
- Mixed-layer CIN
- -96 J/kg
- Mixed-layer LCL
- 590 m above ground
- 0-6 km bulk shear
- 35 kt
- 0-1 km storm-relative helicity
- 148 m²/s²
- 0-3 km storm-relative helicity
- 168 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 4.5
The text
As transmitted, in the capitals the NWS used until 2016.
000 TTAA00 KFTW 202333 COR FFWFTW TXC121-210330- BULLETIN - EBS ACTIVATION REQUESTED FLASH FLOOD WARNING...CORRECTED CREAR TO READ CLEAR IN LINE 12 NATIONAL WEATHER SERVICE FORT WORTH TX 622 PM CDT FRI APR 20 1990 THE NATIONAL WEATHER SERVICE IN FORT WORTH HAS ISSUED A FLASH FLOOD WARNING EFFECTIVE UNTIL 1030 PM CDT FOR PEOPLE IN THE FOLLOWING LOCATIONS... IN NORTH CENTRAL TEXAS ...DENTON COUNTY THE EMERGENCY MANAGEMENT DIRECTOR OF DENTON COUNTY REPORTED THAT SEVERAL CREEKS AND STREAMS IN DENTON COUNTY ARE BEGINNING TO RISE RAPIDLY DUE TO RUNOFF FROM TODAYS RAINS. FLASH FLOODING IS OCCURING ALONG DENTON CREEK...CLEAR CREEK AND INSIDE DENTON ITSELF...ALONG HICKORY CREEK. FLASH FLOODING HAS BEEN REPORTED NEAR ELIZABETH CREEK ROAD...AND AT THE INTERSECTION OF FARM ROAD 407 AND HIGHWAY 114 IN DENTON COUNTY. DENTON CREEK IS EXPECTED TO RISE TO NEAR 15 FEET BY LATE TONIGHT NEAR JUSTIN...WHICH IS FIVE FEET ABOVE BANKFULL. CLEAR CREEK IS EXPECTED TO RISE TO 29 FEET BY LATE TONIGHT NEAR SANGER...WHICH IS 4 FEET ABOVE BANKFULL. 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 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, Apr 20, 12:34 PM CDT, 5 hours 48 minutes before
TXZ031-201830- SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE WACO TX 1233 PM CDT FRI APR 20 1990 ...A FLASH FLOOD WATCH IS IN EFFECT FOR CENTRAL TEXAS TODAY... THUNDERSTORMS AND SHOWERS...SOME WITH VERY HEAVY RAIN...WERE LOCATED TO THE NORTH OF BOSQUE AND HILL COUNTIES...MOVING NORTHEAST NEAR 30 MILES AN HOUR. AT 1230 PM CDT LIGHT RAIN AND SHOWERS WERE LOCATED IN CENTRAL HILL COUNTY MOVING NORTHEAST. PERSONS IN RAIN AREAS SHOULD KEEP ALERT TO POSSIBLE FLOODING OF FLOOD PRONE...LOW LYING AREAS AS THESE STORMS MOVE THROUGH. STAY TUNED TO RADIO..TV OR NOAA WEATHER RADIO FOR FURTHER STATEMENTS.
Special weather statement, Apr 20, 1:45 PM CDT, 4 hours 37 minutes before
TXZ031-201945- SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE WACO TX 144 PM CDT FRI APR 20 1990 ...A FLASH FLOOD WATCH REMAINS IN EFFECT UNTIL 600 PM CDT FOR CENTRAL TEXAS... AT 140 PM CDT MOSTLY LIGHT RAIN AND SHOWERS WERE WIDELY SCATTERED ACROSS BOSQUE AND HILL COUNTIES...MOVING NORTHEAST 30 MILES AN HOUR. PERSONS THROUGH CENTRAL TEXAS SHOULD KEEP ALERT TO POSSIBLE FLOODING OF LOW LYING...FLOOD PRONE AREAS SHOULD HEAVY SHOWERS PASS THROUGH YOUR AREA. STAY TUNED TO RADIO..TV OR NOAA WEATHER RADIO FOR FURTHER STATEMENTS.
Special weather statement, Apr 20, 2:40 PM CDT, 3 hours 42 minutes before
TXZ031-202045- SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE WACO TX 239 PM CDT FRI APR 20 1990 ...A FLASH FLOOD WATCH REMAINS IN EFFECT UNTIL 600 PM CDT FOR CENTRAL TEXAS... SMALL PATCHES OF LIGHT RAIN WERE LOCATED IN NORTHEASTERN MCLENNAN... AND SOUTHEASTERN HILL COUNTIES...MOVING EAST 30 MILES AN HOUR. OTHERWISE...MOST OF THE SHOWER AND THUNDERSTORM ACTIVITY WAS LOCATED NEAR THE DALLAS...FORT WORTH AREA. STAY TUNED TO RADIO..TlV OR NOAA WEATHER RADIO FOR FURTHER STATEMENTS.
Special weather statement, Apr 20, 2:52 PM CDT, 3 hours 30 minutes before
TXZ031-202100- SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE WACO TX 251 PM CDT FRI APR 20 1990 ...THE FLASH FLOOD WATCH FOR CENTRAL TEXAS INCLUDING WACO IS NO LONGER IN EFFECT... ONLY WIDELY SCATTERED LIGHT RAIN WAS INDICATED BY RADAR IN MCLENNAN AND HILL COUNTIES. FURTHER STATEMENTS WILL BE ISSUED AS CONDITIONS WARRANT.
Special weather statement, Apr 20, 3:35 PM CDT, 2 hours 47 minutes before
TXZ019>032-210200- SEVERE WEATHER OUTLOOK FOR NORTH TEXAS NATIONAL WEATHER SERVICE FT WORTH TX 330 PM CDT FRI APR 20 1990 THERE IS A SLIGHT RISK OF SEVERE THUNDERSTORMS THIS AFTERNOON AND TONIGHT OVER NORTH TEXAS TO THE RIGHT OF A CENTER...TEMPLE...BROWNWOOD ...MINERAL WELLS TO GAINESVILLE LINE. THIS AREA INCLUDES THE CITIES OF TYLER...LONGVIEW...PARIS...SHERMAN...WACO AND THE DALLAS...FORT WORTH METROPLEX. THE MAIN THREAT FROM SEVERE THUNDERSTORMS APPEARS TO BE FROM HAIL...DAMAGING WINDS AND VERY HEAVY RAINS. SHOWERS AND THUNDERSTORMS THAT DEVELOPED EARLY THIS MORNING OVER THE CENTRAL PART OF NORTH TEXAS HAVE PRODUCED AN OUTFLOW BOUNDARY FROM NEAR PARIS...SOUTHWEST TO NEAR STEPHENVILLE. THIS BOUNDARY SEPARATES THE RAIN COOLED THUNDERSTORM AIR TO THE NORTH...FROM THE WARM MOIST UNSTABLE AIR TO THE SOUTH. AFTERNOON HEATING HAS DESTABILIZED THE ATMOSPHERE TO THE SOUTH OF THE BOUNDARY WITH WARM MOIST AIR CONTINUING TO STREAM NORTHWARD TOWARD THIS INTERFACE. WITH SEVERAL MORE HOURS OF AFTERNOON HEATING...THIS AREA CAN BE EXPECTED TO DESTABILIZE EVEN FURTHER. LIFTED INDICES IN THIS AREA ARE IN THE MINUS 6 TO MINUS 7 RANGE AT MID AFTERNOON WITH DEWPOINTS IN THE MID 60S. AN UPPER LEVEL LOW PRESSURE TROUGH WILL BE MOVING ACROSS THIS UNSTABLE AREA LATER THIS AFTERNOON AND EVENING WHICH WILL TEND TO FURTHER DESTABILIZE THE AIRMASS AND ENHANCE THUNDERSTORM DEVELOPMENT. MID LEVEL WINDS ARE SOMEWHAT WEAKER TODAY THAN THE PAST FEW DAYS...HENCE CONDITIONS ARE NOT CONDUCIVE TO PRODUCING TORNADOES. EMERGENCY MANAGEMENT OFFICIALS AND SPOTTERS IN THE RISK AREA SHOULD STAY INFORMED OF THE WEATHER SITUATION THIS AFTERNOON AND TONIGHT AND BE PREPARED FOR POSSIBLE ACTIVATION.
The office that day
Everything else NWS Fort Worth, TX issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Apr 20, 4:15 AM CDT | Severe Thunderstorm Warning | FWD | Hardeman | 45 min |
| Apr 20, 8:03 AM CDT | Severe Thunderstorm Warning | FWD | Eastland | 42 min |
| Apr 20, 8:42 AM CDT | Severe Thunderstorm Warning | FWD | Eastland | 48 min |
| Apr 20, 9:11 AM CDT | Severe Thunderstorm Warning | FWD | Erath | 64 min |
Nearby
Flash Flood Warnings in Texas, 1990Every flash flood warning in 1990
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.