Alert archive / Oklahoma / Severe Thunderstorm Warnings in 1990
Severe Thunderstorm Warning 229, NWS Norman, OK
NWS Norman, OK issued this severe thunderstorm warning at May 15, 1990, 8:44 PM CDT for Noble County, Oklahoma. It was in force for 61 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 15, 1990, 8:44 PM CDT (01:44 UTC)
- Expired
- May 15, 1990, 9:45 PM CDT
- In force
- 61 min
- Issued by
- NWS Norman, OK
- Area
- Whole counties
County Noble 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 15, 8:45 PM CDT | Hail 1 | Noble, 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, 1.7 hours before the alert went out and 131 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
- 2163 J/kg
- Mixed-layer CIN
- -38 J/kg
- Mixed-layer LCL
- 1065 m above ground
- 0-6 km bulk shear
- 50 kt
- 0-1 km storm-relative helicity
- 158 m²/s²
- 0-3 km storm-relative helicity
- 196 m²/s²
- Significant tornado parameter
- 1.9
- Supercell composite
- 8.0
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
Special weather statement, May 15, 4:32 PM CDT, 4 hours 12 minutes before
TXZ019-020-152230- SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE WICHITA FALLS TX 430 PM CDT TUE MAY 15 1990 AT 428 PM CDT RADAR INDICATED A VERY STRONG THUNDRSTORM JUST SOUTH OF THE KNOX COUNTY LINE MOVING TO THE NORTHEAST AT 25 MPH. THIS STORM IS TRACKING TOWARD THE COMMUNITY OF MUNDAY. SMALL HAIL IS LIKELY WITH THIS STORM ALONG WITH VERY HEAVY RAINS. STRONG GUSTY WINDS AND DANGEROUS LIGHTNING ARE ALSO A POSSIBILITY. ADDITIONAL STATEMENTS WILL BE ISSUED DURING THE AFTERNOON.
The office that day
Everything else NWS Norman, OK issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| May 15, 7:31 PM CDT | Tornado Warning | OUN | Payne | 44 min |
| May 15, 7:50 PM CDT | Severe Thunderstorm Warning | OUN | Garfield, Logan, Noble | 40 min |
| May 15, 7:57 PM CDT | Severe Thunderstorm Warning | OUN | Lincoln | 63 min |
| May 15, 8:11 PM CDT | Severe Thunderstorm Warning | OUN | Payne | 49 min |
| May 15, 8:27 PM CDT | Severe Thunderstorm Warning | OUN | Garfield | 48 min |
| May 15, 8:57 PM CDT | Tornado Warning | OUN | Lincoln, Payne | 33 min |
| May 15, 9:16 PM CDT | Severe Thunderstorm Warning | OUN | Garfield | 59 min |
| May 15, 10:36 PM CDT | Severe Thunderstorm Warning | OUN | Noble | 39 min |
| May 16, 12:26 AM CDT | Severe Thunderstorm Warning | OUN | Caddo, Comanche | 49 min |
| May 16, 7:51 AM CDT | Severe Thunderstorm Warning | OUN | Bryan | 54 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; verification from NCEI's Storm Data; the sounding from the Mesonet's radiosonde archive.