Alert archive / Oklahoma / Severe Thunderstorm Warnings in 1989
Severe Thunderstorm Warning 102, NWS Tulsa, OK
NWS Tulsa, OK issued this severe thunderstorm warning at May 21, 1989, 2:31 PM CDT for Ottawa County, Oklahoma. It was in force for 59 min. 1 report 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 21, 1989, 2:31 PM CDT (19:31 UTC)
- Expired
- May 21, 1989, 3:30 PM CDT
- In force
- 59 min
- Issued by
- NWS Tulsa, OK
- Area
- Whole counties
County 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 |
|---|---|---|---|
| May 21, 2:45 PM CDT | Hail 0.88 | 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 12:00Z, 7.5 hours before the alert went out and 90 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
- 171 J/kg
- Mixed-layer CIN
- -167 J/kg
- Mixed-layer LCL
- 1091 m above ground
- 0-6 km bulk shear
- 34 kt
- 0-1 km storm-relative helicity
- 133 m²/s²
- 0-3 km storm-relative helicity
- 164 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 4.3
The text
The text of this product is not in the archive. The NWS text archive before 2002 is incomplete.
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 21, 2:27 PM CDT, 4 minutes before
STORM REPORT
NATIONAL WEATHER SERVICE TULSA, OK
227 PM CDT SUN MAY 21 1989
TIME CDT COUNTY EVENT
1325 PM WASHINGTON GOLFBALL SIZE HAIL FELL 6 MILES NORTHEAST OF
COPAN.
1350 PM NOWATA GOLFBALL SIZE HAIL FELL AT SOUTH COFFEEVILLE.
1400 PM NOWATA GOLFBALL SIZE HAIL FELL AT DELAWARE.The office that day
Everything else NWS Tulsa, OK issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| May 21, 1:06 PM CDT | Severe Thunderstorm Warning | TSA | Craig | 69 min |
| May 21, 1:06 PM CDT | Severe Thunderstorm Warning | TSA | Nowata, Washington | 69 min |
| May 21, 2:03 PM CDT | Severe Thunderstorm Warning | TSA | Craig, Nowata | 57 min |
| May 21, 2:59 PM CDT | Severe Thunderstorm Warning | TSA | Craig, Delaware, Mayes | 61 min |
| May 21, 5:52 PM CDT | Severe Thunderstorm Warning | TSA | Delaware | 53 min |
| May 21, 3:27 PM CDT | Severe Thunderstorm Warning | TSA | Benton | 63 min |
| May 21, 4:24 PM CDT | Severe Thunderstorm Warning | TSA | Benton | 51 min |
| May 21, 4:33 PM CDT | Severe Thunderstorm Warning | TSA | Madison | 57 min |
| May 21, 5:13 PM CDT | Tornado Warning | TSA | Benton | 47 min |
| May 21, 5:20 PM CDT | Severe Thunderstorm Warning | TSA | Madison, Washington | 55 min |
| May 21, 5:57 PM CDT | Tornado Warning | TSA | Washington | 48 min |
| May 21, 6:12 PM CDT | Severe Thunderstorm Warning | TSA | Madison | 63 min |
| May 21, 6:48 PM CDT | Severe Thunderstorm Warning | TSA | Franklin, Johnson | 57 min |
Nearby
Severe Thunderstorm Warnings in Oklahoma, 1989Every severe thunderstorm warning in 1989
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.