Alert archive / Oklahoma / Severe Thunderstorm Warnings in 1990

Severe Thunderstorm Warning 70, NWS Tulsa, OK

May 14, 1990Nowata County, Oklahoma

NWS Tulsa, OK issued this severe thunderstorm warning at May 14, 1990, 10:20 PM CDT for Nowata County, Oklahoma. It was in force for 55 min.

The area

The counties it named.

The facts

Issued
May 14, 1990, 10:20 PM CDT (03:20 UTC)
Expired
May 14, 1990, 11:15 PM CDT
In force
55 min
Issued by
NWS Tulsa, OK
Area
Whole counties

County Nowata 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

Springfield, MO (KUMN), launched 00:00Z, 3.3 hours before the alert went out and 162 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, Springfield, MO at 00:00Z on 1990-05-15Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 1937 joules per kilogram.LCLLFCEL10008507005003002001001 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, Springfield, MO at 00:00Z on 1990-05-15The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 99 square meters per square second.19395878Sfc1 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
1937 J/kg
Mixed-layer CIN
-105 J/kg
Mixed-layer LCL
1002 m above ground
0-6 km bulk shear
40 kt
0-1 km storm-relative helicity
99 m²/s²
0-3 km storm-relative helicity
189 m²/s²
Significant tornado parameter
0.8
Supercell composite
3.2

Open this sounding in Storm Lab

The text

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

000 
TTAA00 KTUL 150319
SVRTUL
OKC105-113-150415-
 
BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE TULSA OK
1020 PM CDT MON MAY 14 1990
 
THE NATIONAL WEATHER SERVICE IN TULSA HAS ISSUED A
SEVERE THUNDERSTORM WARNING EFFECTIVE UNTIL 1115 PM CDT
FOR PEOPLE IN THE FOLLOWING COUNTIES ...
 
IN NORTHEAST OKLAHOMA
 
   ...NORTHERN NOWATA COUNTY...NORTHERN OSAGE COUNTY
 
AT 1018 PM CDT RADAR INDICATED A SEVERE THUNDERSTORM NEAR ELLIOT, OK
AND ANOTHER SEVERE THUNDERSTORM 10 MILES NORTHWEST OF PAWHUSKA, OK.
THE THUNDERSTORMS WERE MOVING EAST AT 10 MPH.
 
 
 
A TORNADO WATCH IS ALSO IN EFFECT FOR THE WARNED AREA.  REMEMBER...
SEVERE THUNDERSTORMS CAN AND OCCASIONALLY DO PRODUCE TORNADOES
WITH LITTLE OR NO ADVANCE WARNING.  REMAIN CALM BUT BE ALERT TO
RAPIDLY CHANGING WEATHER CONDITIONS.

The office that day

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

IssuedProductOfficeCountiesLasted
May 14, 8:17 PM CDTSevere Thunderstorm WarningTSAOsage, Washington58 min
May 14, 9:45 PM CDTSevere Thunderstorm WarningTSAWashington60 min
May 14, 10:20 PM CDTSevere Thunderstorm WarningTSAOsage55 min
May 14, 11:15 PM CDTSevere Thunderstorm WarningTSACraig60 min
May 15, 12:14 AM CDTSevere Thunderstorm WarningTSACraig46 min
May 15, 12:20 AM CDTSevere Thunderstorm WarningTSAOttawa40 min

Nearby

Severe Thunderstorm Warnings in Oklahoma, 1990Every severe thunderstorm 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.