Alert archive / Oklahoma / Flash Flood Warnings in 1990
Flash Flood Warning 6, NWS Norman, OK
NWS Norman, OK issued this flash flood warning at Apr 19, 1990, 11:54 AM CDT for Cotton County, Jefferson County, Stephens County, Oklahoma. It was in force for 3 hr.
The area
The counties it named.
The facts
- Issued
- Apr 19, 1990, 11:54 AM CDT (16:54 UTC)
- Expired
- Apr 19, 1990, 3:00 PM CDT
- In force
- 3 hr
- Issued by
- NWS Norman, OK
- Area
- Whole counties
Counties Cotton County, OK, Jefferson County, OK, Stephens County, OK
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
Norman, OK (KOUN), launched 12:00Z, 4.9 hours before the alert went out and 117 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
- 0 J/kg
- Mixed-layer CIN
- No buoyant parcel
- Mixed-layer LCL
- 539 m above ground
- 0-6 km bulk shear
- 37 kt
- 0-1 km storm-relative helicity
- 201 m²/s²
- 0-3 km storm-relative helicity
- 319 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 KOKC 191655 FFWOKC OKC033-067-137-192000- BULLETIN - EBS ACTIVATION REQUESTED FLASH FLOOD WARNING NATIONAL WEATHER SERVICE OKLAHOMA CITY OK 1154 AM CDT THU APR 19 1990 THE NATIONAL WEATHER SERVICE IN OKLAHOMA CITY HAS ISSUED A FLASH FLOOD WARNING EFFECTIVE UNTIL 300 PM CDT FOR THE FOLLOWING OKLAHOMA LOCATIONS... IN SOUTHWEST OKLAHOMA ...COTTON COUNTY...JEFFERSON COUNTY...STEPHENS COUNTY RAIN AND THUNDERSTORMS CONTINUE ACROSS THESE COUNTIES AT 1154 AM WITH LOCALLY HEAVY RAINFALL OCCURRING. AN ADDITIONAL INCH OF RAIN HAS FALLEN OVER PORTIONS OF THESE COUNTIES THIS MORNING...ON TOP OF 2 TO 3 INCHES THAT FELL WEDNESDAY AND WEDNESDAY NIGHT. FLOODING IS LIKELY AS THE ADDITIONAL RAINFALL RUNOFF OCCURS. PEOPLE ALONG COW CREEK SHOULD BE ESPECIALLY ALERT TO RISING WATERS. DO NOT DRIVE YOUR VEHICLE INTO AREAS WHERE THE WATER COVERS THE ROADWAY. THE WATER DEPTH MAY BE TOO GREAT TO ALLOW YOUR CAR TO CROSS SAFELY. VEHICLES CAUGHT IN RpISING WATER SHOULD BE ABANDONED QUICKLY. MOVE TO 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, Apr 19, 6:19 AM CDT, 5 hours 35 minutes before
TXZ020-019-191300- SPECIAL WEATHER STATEMENT...CORRECTON FOR 3RD PARAGRAPH... NATIONAL WEATHER SERVICE WICHITA FALLS TX 540 AM CDT THU APR 19 1990 A FLASH FLOOD WATCH REMAINS IN EFFECT TODAY AND TONIGHT FOR WICHITA FALLS AND THE SURROUNDING COUNTY AREA. ALL SIGNIFICANT PRECIPITATION ENDED IN THE WICHITA FALLS AREA SHORTLY AFTER MIDNIGHT. BY 530 AM CDT...THE TRAILING EDGE OF THE LIGHT RAIN WAS EAST OF MONTAGUE AND JACK COUNTIES. MOVEMENT WAS EAST NORTHEAST AT 15 MPH. TOTAL RAINFALL RECORDED AT THE WICHITA FALLS AIRPORT WAS 2.46 INCHES. APRIL PRECIPITATION NOW TOTALS 3.90 INCHES. FOR THE YEAR 1990...A ROBUST 16.13 INCHES HAS BEEN OBSERVED. ANOTHER ROUND OF RAIN AND THUNDERSTORMS IS EXPECTED LATTER TODAY... PROBABILITY DURING THE AFTERNOON HOURS. AN ADDITIONAL ONE TO TWO INCHES OF RAIN IS POSSIBLE IN THE NEXT 24 HOURS. AREA RIVERS AND STREAMS WERE SHOWING RAPID RISES. THE EXPECTED ADDITIONAL RAINS WILL RUNOFF RAPIDLY PRODUCING FLASH FLOODING. BETWEEN 5 AND 6AM...ISOLATED THUNDERSTORMS WERE BEGINNING TO BE DETECTED BY THE WICHITA FALLS RADAR IN THE SOUTH TEXAS PLAINS NORTH OF SWEETWATER. MOVEMENT WAS NORTHEAST. PERSONS LIVING IN FLOOD PRONE AREA SHOULD BE ALERT TO CHANGING WEATHER CONDITIONS TODAY.
Special weather statement, Apr 19, 8:34 AM CDT, 3 hours 20 minutes before
TXZ020-019-191500- SPECIAL WEATHER STATEMENT...CORRECTON FOR 3RD PARAGRAPH... NATIONAL WEATHER SERVICE WICHITA FALLS TX 830 AM CDT THU APR 19 1990 A FLASH FLOOD WATCH REMAINS IN EFFECT TODAY AND TONIGHT FOR WICHITA FALLS AND THE SURROUNDING COUNTY AREA. REPORTS COMING IN FROM THE RIVERS AND CREEKS IN THE SUROUNDING AREA INDICATE THAT MOST CREEKS ARE BANKFULL OR SOME ALREADY ABOVE FLOOD STAGE. MORE RAIN IS ON ITS WAY. AT 815 THIS MORNING A LARGE AREA OF HEAVY THUNDERSTORMS WERE INDICATED FROM SOUTHWEST KNOX COUNTY JUST WEST OF MONDAY DOWN TO NEAR ABILENE. THE THUNDERSTORMS WERE MOVING TO THE NORTHEAST AT ABOUT 30 MILES AN HOUR AND WILL BE MOVING INTO THE WICHITA FALLS AREA BY NOON. FLASH FLOODING CAN BE EXPECTED IN FLOOD PRONE AREAS AS THE THUNDERSTORMS MOVE THROUGH THIS AREA. PERSONS SHOULD MONITOR THE WEATHER SITUATION THROUGH THE DAY AND TAKE NECESSARY PRECAUTIONS. ROADWAYS CAN BECOME FLOODED RAPIDLY AND DRIVING THROUGH ANY FLOODING ON ROADWAYS IS NOT RECOMMENDED.
Special weather statement, Apr 19, 8:35 AM CDT, 3 hours 19 minutes before
TXZ020-019-191500- SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE WICHITA FALLS TX 830 AM CDT THU APR 19 1990 A FLASH FLOOD WATCH REMAINS IN EFFECT TODAY AND TONIGHT FOR WICHITA FALLS AND THE SURROUNDING COUNTY AREA. REPORTS COMING IN FROM THE RIVERS AND CREEKS IN THE SUROUNDING AREA INDICATE THAT MOST CREEKS ARE BANKFULL OR SOME ALREADY ABOVE FLOOD STAGE. MORE RAIN IS ON ITS WAY. AT 815 THIS MORNING A LARGE AREA OF HEAVY THUNDERSTORMS WERE INDICATED FROM SOUTHWEST KNOX COUNTY JUST WEST OF MONDAY DOWN TO NEAR ABILENE. THE THUNDERSTORMS WERE MOVING TO THE NORTHEAST AT ABOUT 30 MILES AN HOUR AND WILL BE MOVING INTO THE WICHITA FALLS AREA BY NOON. FLASH FLOODING CAN BE EXPECTED IN FLOOD PRONE AREAS AS THE THUNDERSTORMS MOVE THROUGH THIS AREA. PERSONS SHOULD MONITOR THE WEATHER SITUATION THROUGH THE DAY AND TAKE NECESSARY PRECAUTIONS. ROADWAYS CAN BECOME FLOODED RAPIDLY AND DRIVING THROUGH ANY FLOODING ON ROADWAYS IS NOT RECOMMENDED.
Nearby
Flash Flood Warnings in Oklahoma, 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.