Alert archive / Oklahoma / Flash Flood Warnings in 1987

Flash Flood Warning 2, NWS Tulsa, OK

September 27, 1987Osage County, Oklahoma

NWS Tulsa, OK issued this flash flood warning at Sep 27, 1987, 10:57 PM CDT for Osage County, Oklahoma. It was in force for 4 hr.

The area

The counties it named.

The facts

Issued
Sep 27, 1987, 10:57 PM CDT (03:57 UTC)
Expired
Sep 28, 1987, 3:00 AM CDT
In force
4 hr
Issued by
NWS Tulsa, OK
Area
Whole counties

County Osage 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, 4.0 hours before the alert went out and 174 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.

Skew-T log-pSkew-T log-p diagram, Ok Cty/Will Rgrs, OK at 00:00Z on 1987-09-28Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 2538 joules per kilogram.LCLEL10008507005003002001001 km2 km3 km6 km9 km12 km15 km-30°-20°-10°0°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Ok Cty/Will Rgrs, OK at 00:00Z on 1987-09-28The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity -8 square meters per square second.1939Sfc1 km3 km6 km9 kmRMLM
The wind turning with height, colored by layer: ground to 1 km, 1 to 3 km, 3 to 6 km, 6 to 10 km.
Mixed-layer CAPE
2538 J/kg
Mixed-layer CIN
-3 J/kg
Mixed-layer LCL
930 m above ground
0-6 km bulk shear
14 kt
0-1 km storm-relative helicity
-8 m²/s²
0-3 km storm-relative helicity
89 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.0

Open this sounding in Storm Lab

The text

As transmitted, in the capitals the NWS used until 2016.

000 
TTAA00 KTUL 280357
FFWTUL
OKC113-280800-
 
BULLETIN - EBS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE TULSA OK
1057 PM CDT SUN SEP 27 1987
 
THE NATIONAL WEATHER SERVICE HAS ISSUED A FLASH FLOOD WARNING
EFFECTIVE UNTIL  300 AM CDT FOR PEOPLE IN THE FOLLOWING COUNTY...
 
IN NORTHEAST OKLAHOMA
          ...OSAGE
 
AT 1055 PM CDT THE WEATHER RADAR INDICATED SLOW MOVING THUNDERSTORMS
WITH HEAVY RAIN CONTINUED OVER MUCH OF OSAGE COUNTY.
THUNDERSTORMS WITH VERY HEAVY RAIN HAS BEEN OVER MUCH OF OSAGE COUNTY
FOR THE PAST TWO HOURS.  RADAR INDICATED AS MUCH AS 5 INCHES OF RAIN
MAY HAVE  FELL OVER CENTRAL OSAGE COUNTY.
 
A FLASH FLOOD WARNING MEANS THAT FLOODING IS LIKELY OR HAS BEEN
REPORTED.  STAY ALERT AND WATCH FOR RAPIDLY RISING WATER.
REMEMBER...IT'S IMPORTANT TO KNOW WHERE YOU ARE RELATIVE TO THE
NEAREST STREAM...CREEK OR RIVER WHICH CAN BECOME A KILLER DURING
PERIODS OF HEAVY RAIN.
 
KEEP TUNED TO THIS STATION FOR THE LATEST WEATHER BULLETINS.

The office that day

Everything else NWS Tulsa, OK issued on the same UTC day.

IssuedProductOfficeCountiesLasted
Sep 27, 9:25 PM CDTSevere Thunderstorm WarningTSAOsage65 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.