Alert archive / Oklahoma / Severe Thunderstorm Warnings in 1990

Severe Thunderstorm Warning 168, NWS Tulsa, OK

May 27, 1990McIntosh County, Pittsburg County, Oklahoma

NWS Tulsa, OK issued this severe thunderstorm warning at May 27, 1990, 12:13 AM CDT for McIntosh County, Pittsburg County, Oklahoma. It was in force for 47 min. 2 reports came from inside the area while it was in force.

The area

The counties it named, with what was reported inside it.

The facts

Issued: May 27, 1990, 12:13 AM CDT (05:13 UTC)
Expired: May 27, 1990, 1:00 AM CDT
In force: 47 min
Issued by: NWS Tulsa, OK
Area: Whole counties

Counties McIntosh County, OK, Pittsburg County, OK

The radar

The WSR-88D network and its archive begin in 1991, so there is no radar volume for this alert.

What was reported inside it

Time	Report	Where	Remark
May 27, 12:25 AM CDT	Thunderstorm Wind 52	Mcintosh, OK
May 27, 12:30 AM CDT	Thunderstorm Wind 52	Pittsburg, OK

NCEI Storm Data entries that began inside the alert's area while it was in force. Before 2003 the local storm report archive is thin, so this is the record of what happened rather than what was phoned in. Storm Data before 1996 records only tornadoes, thunderstorm wind and hail.

The nearest sounding before it

Norman, OK (KOUN), launched 00:00Z, 5.2 hours before the alert went out and 154 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-p

Temperature in red, dew point in green, the mixed-layer parcel dashed.

Hodograph

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: 3596 J/kg
Mixed-layer CIN: -26 J/kg
Mixed-layer LCL: 867 m above ground
0-6 km bulk shear: 46 kt
0-1 km storm-relative helicity: 101 m²/s²
0-3 km storm-relative helicity: 261 m²/s²
Significant tornado parameter: 4.5
Supercell composite: 18.2

Open this sounding in Storm Lab

The text

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

000 
TTAA00 KTUL 270513
SVRTUL
OKC091-121-270600-
 
BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE TULSA OK
1213 AM CDT SUN MAY 27 1990
 
THE NATIONAL WEATHER SERVICE IN TULSA HAS ISSUED A
SEVERE THUNDERSTORM WARNING EFFECTIVE UNTIL  100 AM CDT
FOR PEOPLE IN THE FOLLOWING COUNTIES ...
 
IN EAST CENTRAL OKLAHOMA
 
   ...MCINTOSH COUNTY
 
IN SOUTHEAST OKLAHOMA
 
   ...PITTSBURG COUNTY
 
AT 12 10 AM THE TULSA WEATHER RADAR INDICATED A LINE OF SEVERE
THUNDERSTORMS FROM SAVANNA TO 10 MILES WEST OF EUFALA MOVING TO THE
EAST AT 50 MPH. THESE STORMS WILL LIKELY PRODUCE WINDS IN EXCESS OF 60
MPH.
 
 
SEVERE THUNDERSTORMS PRODUCE DAMAGING WIND IN EXCESS OF 60 MPH...
LARGE HAdIL...DEADLY LIGHTNING AND VERY HEAVY RAIN.  FOR YOUR
PROTECTION MOVE TO AN INTERIOR ROOM ON THE LOWEST FLOOR OF YOUR
HOME OR BUSINESS.
 
KEEP TUNED TO THIS STATION FOR THE LATEST WEATHER BULLETINS.

What forecasters said that day

The local office's own words before this severe thunderstorm 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, 11:51 PM CDT, 22 minutes before

STORM REPORT
NATIONAL WEATHER SERVICE TULSA, OK
1150 PM CDT SAT MAY 26 1990

TIME/CDT     COUNTY      EVENT
2245 PM      CREEK       DIME SIZE HAIL AT JUST SOUTH OF BRISTOW
2300 PM      OKMULGEE    DIME SI?ZE HAIL NORTHWEST OF HENRYETTA

The office that day

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

Issued	Product	Office	Counties	Lasted
May 26, 10:15 PM CDT	Severe Thunderstorm Warning	TSA	Osage	45 min
May 26, 10:31 PM CDT	Severe Thunderstorm Warning	TSA	Creek, Okmulgee	44 min
May 27, 12:28 AM CDT	Severe Thunderstorm Warning	TSA	Haskell	47 min
May 27, 12:56 AM CDT	Severe Thunderstorm Warning	TSA	LeFlore, Sequoyah	64 min
May 27, 3:43 AM CDT	Severe Thunderstorm Warning	TSA	Okfuskee	62 min
May 27, 4:08 AM CDT	Severe Thunderstorm Warning	TSA	McIntosh, Okmulgee	67 min

Nearby

Severe Thunderstorm Warnings in Oklahoma, 1990 Every 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; verification from NCEI's Storm Data; the sounding from the Mesonet's radiosonde archive.