Alert archive / Oklahoma / Severe Thunderstorm Warnings in 1987

Severe Thunderstorm Warning 65, NWS Tulsa, OK

July 4, 19875 counties in Oklahoma

NWS Tulsa, OK issued this severe thunderstorm warning at Jul 4, 1987, 10:09 AM CDT for 5 counties in Oklahoma. It was in force for 51 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: Jul 4, 1987, 10:09 AM CDT (15:09 UTC)
Expired: Jul 4, 1987, 11:00 AM CDT
In force: 51 min
Issued by: NWS Tulsa, OK
Area: Whole counties

Counties Nowata County, OK, Osage County, OK, Rogers County, OK, Tulsa County, OK, Washington 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
Jul 4, 10:45 AM CDT	Thunderstorm Wind 0	Rogers, OK
Jul 4, 11:00 AM CDT	Thunderstorm Wind 0	Rogers, 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

Springfield, MO (KUMN), launched 12:00Z, 3.2 hours before the alert went out and 191 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: 2326 J/kg
Mixed-layer CIN: -26 J/kg
Mixed-layer LCL: 694 m above ground
0-6 km bulk shear: 27 kt
0-1 km storm-relative helicity: 53 m²/s²
0-3 km storm-relative helicity: 93 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 3.1

Open this sounding in Storm Lab

The text

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

000 
TTAA00 KTUL 041509
SVRTUL
OKC037-105-113-117-131-143-147-041615-
 
BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE TULSA OK
1009 AM CDT SAT JUL 4 1987
 
THE NATIONAL WEATHER SERVICE HAS ISSUED A SEVERE THUNDERSTORM WARNING
EFFECTIVE UNTIL 1100 AM CDT FOR PEOPLE IN THE FOLLOWING COUNTIES...
 
IN NORTHEAST OKLAHOMA
          ...NORTHERN CREEK...NOWATA...EASTERN OSAGE
          ...PAWNEE...ROGERS...TULSA
          ...WASHINGTON
 
AT 1002 AM CDT RADAR INDICATED A LINE OF SEVERE THUNDERSTORMS
LOCATED JUST EAST OF BARTLESVILLE TO CLEVELAND OKLAHOMA.
THE STORMS WAS MOVING TO THE SOUTHEAST AT 40 MPH.
 
SEVERE THUNDERSTORMS PRODUCE DAMAGING WIND IN EXCESS OF 60 MPH...
LARGE HAIL...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.

The office that day

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

Issued	Product	Office	Counties	Lasted
Jul 4, 10:09 AM CDT	Severe Thunderstorm Warning	TSA	Creek, Pawnee	51 min

Nearby

Severe Thunderstorm Warnings in Oklahoma, 1987 Every severe thunderstorm 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; verification from NCEI's Storm Data; the sounding from the Mesonet's radiosonde archive.