Alert archive / Oklahoma / Severe Thunderstorm Warnings in 1987
Severe Thunderstorm Warning 9, NWS Tulsa, OK
NWS Tulsa, OK issued this severe thunderstorm warning at Mar 22, 1987, 1:44 AM CST for Delaware County, Ottawa County, Oklahoma. It was in force for 61 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
- Mar 22, 1987, 1:44 AM CST (07:44 UTC)
- Expired
- Mar 22, 1987, 2:45 AM CST
- In force
- 61 min
- Issued by
- NWS Tulsa, OK
- Area
- Whole counties
Counties Delaware County, OK, Ottawa 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 |
|---|---|---|---|
| Mar 22, 1:58 AM CST | Hail 0.75 | Delaware, OK | |
| Mar 22, 2:38 AM CST | Hail 0.75 | Ottawa, 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 00:00Z, 7.7 hours before the alert went out and 95 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
- 305 J/kg
- Mixed-layer CIN
- -128 J/kg
- Mixed-layer LCL
- 1117 m above ground
- 0-6 km bulk shear
- 44 kt
- 0-1 km storm-relative helicity
- 166 m²/s²
- 0-3 km storm-relative helicity
- 293 m²/s²
- Significant tornado parameter
- 0.2
- Supercell composite
- 4.8
The text
As transmitted, in the capitals the NWS used until 2016.
000
TTAA00 KTUL 220744
SVRTUL
OKC041-115-220845-
BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE TULSA OK
144 AM CST SUN MAR 22 1987
THE NATIONAL WEATHER SERVICE HAS ISSUED A SEVERE THUNDERSTORM WARNING
EFFECTIVE UNTIL 245 AM CST FOR PEOPLE IN THE FOLLOWING COUNTIES...
IN NORTHEAST OKLAHOMA
...NORTHERN DELAWARE...EASTERN OTTAWA
AT 142 AM CST A SEVERE THUNDERSTORM INDICATED NEAR GROVE OKLAHOMA.
THISX STORM WAS MOVING TO THE NORTH NORTHEAST AT 40 MPH.
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 |
|---|---|---|---|---|
| Mar 21, 7:06 PM CST | Severe Thunderstorm Warning | TSA | LeFlore, Sequoyah | 54 min |
Nearby
Severe Thunderstorm Warnings in Oklahoma, 1987Every 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.