Alert archive / Oklahoma / Flash Flood Warnings in 1987
Flash Flood Warning 2, NWS Norman, OK
NWS Norman, OK issued this flash flood warning at May 26, 1987, 9:34 PM CDT for 5 counties in Oklahoma. It was in force for 3 hr.
The area
The counties it named.
The facts
- Issued
- May 26, 1987, 9:34 PM CDT (02:34 UTC)
- Expired
- May 27, 1987, 12:30 AM CDT
- In force
- 3 hr
- Issued by
- NWS Norman, OK
- Area
- Whole counties
Counties Alfalfa County, OK, Blaine County, OK, Dewey County, OK, Garfield County, OK, Major 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
Ok Cty/Will Rgrs, OK (KOKC), launched 00:00Z, 2.6 hours before the alert went out and 120 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
- 1360 J/kg
- Mixed-layer CIN
- -6 J/kg
- Mixed-layer LCL
- 1210 m above ground
- 0-6 km bulk shear
- 24 kt
- 0-1 km storm-relative helicity
- 94 m²/s²
- 0-3 km storm-relative helicity
- 211 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 4.7
The text
As transmitted, in the capitals the NWS used until 2016.
000
TTAA00 KOKC 270234
FFWOKC
OKC003-011-039-043-047-053-093-270530-
BULLETIN - EBS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE OKLAHOMA CITY OK
934 PM CDT TUE MAY 26 1987
THE NATIONAL WEATHER SERVICE HAS ISSUED A FLASH FLOOD WARNING
EFFECTIVE UNTIL 1230 AM CDT FOR PEOPLE IN THE FOLLOWING COUNTIES...
IN NORTHWEST OKLAHOMA
...ALFALFA...BLAINE...CUSTER
...EASTERN DEWEY...GARFIELD...GRANT
...EASTERN MAJOR
HEAVY THUNDERSTORMS HAVE PRODUCED RAINFALL AMOUNTS OF 3 TO 4 INCHES
OVER PORTIONS OF THESE COUNTIES TONIGHT. ADDITIONAL RAINFALL IS
LIKELY AS THUNDERSTORMS CONTINUE TO TRACK ACROSS THIS AREA.
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
Local storm report, May 26, 6:19 PM CDT, 3 hours 15 minutes before
STORM REPORT NATIONAL WEATHER SERVICE OKLAHOMA CITY OK 615 PM CST TUE MAY 26 1987 TIME(CDT) COUNTY REPORT 510 PM DEWEY 60 MPH WIND 10 MILES SOUTHEAST OF SEILING 535 PM BLAINE 70 MPH WIND BLEW OVER A TRAILER NEAR LONGDALE 535 PM MAJOR 60 MPH WIND 8 MILES NORTH OF CEDAR SPRINGS 600 PM MAJOR 60 MPH WIND 4 MILES SOUTH OF RINGWOOD
Special weather statement, May 26, 6:47 PM CDT, 2 hours 47 minutes before
SPECIAL WEATHER STATEMENT AND RADAR SUMMARY
NATIONAL WEATHER SERVICE OKLAHOMA CITY OK
645 PM CDT TUE MAY 26 1987
TORNADO WATCH FOR PORTIONS OF EXTREME WESTERN OKLAHOMA
UNTIL 10 PM AND FOR THE REMAINDER OF WESTERN AND CENTRAL
OKLAHOMA UNTIL MIDNIGHT....
AT 630 PM CDT THE OKLAHOMA CITY RADAR INDICATED A LARGE AREA
OF SHOWERS AND THUNDERSTORMS ACROSS NORTHWEST OKLAHOMA. VERY
STRONG THUNDERSTORMS EXTENDED FROM NEAR ELK CITY TO NEAR
TALOGA TO JET. THESE STORMS HAVE THE POTENTIAL TO PRODUCE
HAIL...STRONG WINDS...HEAVY RAINS...AND FREQUENT LIGHTNING.
MOVEMENT OF THE SHOWERS AND THUNDERSTORMS WAS TO THE NORTHEAST
AT ABOUT 30 MILES AN HOUR.Special weather statement, May 26, 7:48 PM CDT, 1 hour 46 minutes before
SPECIAL WEATHER STATEMENT AND RADAR SUMMARY
NATIONAL WEATHER SERVICE OKLAHOMA CITY OK
745 PM CDT TUE MAY 26 1987
TORNADO WATCH FOR PORTIONS OF EXTREME WESTERN OKLAHOMA
UNTIL 10 PM AND FOR THE REMAINDER OF WESTERN AND CENTRAL
OKLAHOMA UNTIL MIDNIGHT....
AT 735 PM CDT THE OKLAHOMA CITY RADAR INDICATED A LARGE AREA
OF SHOWERS AND THUNDERSTORMS ACROSS NORTHWEST OKLAHOMA. VERY
STRONG THUNDERSTORMS WERE LOCATED FROM EASTERN MAJOR COUNTY
INTO NORTHEAST CUSTER COUNTY. ANOTHER VERY STRONG THUNDERSTORM
WAS CROSSING THE BORDER INTO KANSAS...NEAR CALDWELL. THE STRONGER
THUNDERSTORMS MAY PRODUCE HAIL...STRONG WINDS...AND HEAVY
RAINFALL.
MOVEMEN@T OF THE SHOWERS AND THUNDERSTORMS WAS TO THE NORTHEAST
AT ABOUT 30 MILES AN HOUR.Local storm report, May 26, 8:15 PM CDT, 1 hour 19 minutes before
STORM REPORT NATIONAL WEATHER SERVICE OKLAHOMA CITY OK 710 PM CST TUE MAY 26 1987 TIME(CDT) COUNTY REPORT 710 BLAINE DIME SIZE HAIL AT EAGLE CITY 733 GRANT 3/4 INCH HAIL 12 MILES NORTHEAST OF MEDFORD 740 GRANT NICKEL SIZE HAIL 10 MILES NORTHEAST OF MEDFORD
Special weather statement, May 26, 8:52 PM CDT, 42 minutes before
SPECIAL WEATHER STATEMENT AND RADAR SUMMARY
NATIONAL WEATHER SERVICE OKLAHOMA CITY OK
845 PM CDT TUE MAY 26 1987
TORNADO WATCH FOR PORTIONS OF EXTREME WESTERN OKLAHOMA
UNTIL 10 PM AND FOR THE REMAINDER OF WESTERN AND CENTRAL
OKLAHOMA UNTIL MIDNIGHT....
AT 830 PM CDT THE OKLAHOMA CITY RADAR INDICATED A LARGE AREA
OF RAIN AND THUNDERSTORMS ACROSS NORTHWEST OKLAHOMA. THE
PRECIPITATION WAS GENERALLY NORTHWEST OF A LINE FROM ALTUS
TO WATONGA TO NEWKIRK. THE STRONGEST STORMS WERE LOCATED FROM
NEAR ENID TO NEAR CANTON. HAIL...STRONG WINDS... AND VERY HEAVY
RAINS ARE POSSIBLE WITH THE STRONGER STORMS.
COMPUTER ANALYZED RADAR DATA INDICATES THAT 2 TO 4 INCHES OF RAIN
HAS FALLEN THE PAST COUPLE OF HOURS FROM PORTIONS OF WESTERN
CUSTER COUNTY ACROSS DEWEY AND BLAINE COUNTIES INTO EASTERN MAJOR
COUNTY.
.
MOVEMENT OF THE THUNDERSTORMS AND RAIN WAS TO THE NORTHEAST
AT ABOUT 35 MILES AN HOUR.Local storm report, May 26, 9:09 PM CDT, 25 minutes before
STORM REPORT
NATIONAL WEATHER SERVICE OKLAHOMA CITY OK
904 PM CST TUE MAY 26 1987
TIME(CDT) COUNTY REPORT
645PM CUSTER DIME SIZE INCH HAIL AND 50 MPH WIND 9 WEST OF
THOMAS
705PM DEWEY DIME SIZE HAIL 5 NORTH OF FAY
835PM GARFIELD 1 INCH HAIL AT VANCE AIR FORCE BASE
843PM GARFIELD GOLFBALL SIZE HAIL JUST WEST OF ENIDThe office that day
Everything else NWS Norman, OK issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| May 26, 8:25 PM CDT | Severe Thunderstorm Warning | OUN | Garfield | 65 min |
| May 26, 9:34 PM CDT | Flash Flood Warning | OUN | Custer | 3 hr |
| May 26, 9:34 PM CDT | Flash Flood Warning | OUN | Grant | 3 hr |
| May 26, 9:37 PM CDT | Severe Thunderstorm Warning | OUN | Kay | 43 min |
| May 26, 9:44 PM CDT | Severe Thunderstorm Warning | OUN | Garfield, Major | 46 min |
| May 26, 10:43 PM CDT | Severe Thunderstorm Warning | OUN | Caddo | 47 min |
| May 27, 12:28 AM CDT | Flash Flood Warning | OUN | Blaine, Custer, Dewey | 2 hr |
| May 27, 10:45 AM CDT | Flash Flood Warning | OUN | Garfield, Kingfisher | 3 hr |
| May 27, 3:00 PM CDT | Flash Flood Warning | OUN | Canadian, Logan, Oklahoma | 3 hr |
| May 27, 5:33 PM CDT | Flash Flood Warning | OUN | Caddo | 4 hr |
| May 27, 5:33 PM CDT | Flash Flood Warning | OUN | Canadian, Cleveland, Logan, Oklahoma | 4 hr |
| May 27, 5:33 PM CDT | Flash Flood Warning | OUN | Grady, McClain | 4 hr |
| May 27, 6:08 PM CDT | Flash Flood Warning | OUN | Comanche, Kiowa | 3 hr |
| May 27, 6:08 PM CDT | Flash Flood Warning | OUN | Stephens | 3 hr |
| May 27, 6:56 PM CDT | Severe Thunderstorm Warning | OUN | Cleveland, Oklahoma | 34 min |
Nearby
Flash Flood Warnings in Oklahoma, 1987Every flash flood warning in 1987
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.