Alert archive / Oklahoma / Severe Thunderstorm Warnings in 1998
Severe Thunderstorm Warning 111, NWS Norman, OK
NWS Norman, OK issued this severe thunderstorm warning at Apr 14, 1998, 3:20 PM CDT for Kiowa County, Oklahoma. It was in force for 40 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
- Apr 14, 1998, 3:20 PM CDT (20:20 UTC)
- Expired
- Apr 14, 1998, 4:00 PM CDT
- In force
- 40 min
- Issued by
- NWS Norman, OK
- Area
- Whole counties
County Kiowa County, OK
What was reported inside it
| Time | Report | Where | Remark |
|---|---|---|---|
| Apr 14, 3:29 PM CDT | Hail 1 | Cooperton, 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.
The nearest sounding before it
Norman, OK (KOUN), launched 12:00Z, 8.3 hours before the alert went out and 148 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
- 0 J/kg
- Mixed-layer CIN
- No buoyant parcel
- Mixed-layer LCL
- 2302 m above ground
- 0-6 km bulk shear
- 50 kt
- 0-1 km storm-relative helicity
- 169 m²/s²
- 0-3 km storm-relative helicity
- 248 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
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.
NWS Norman, OK wrote its last area forecast discussion before this severe thunderstorm warning went out at Apr 14, 11:20 AM CDT, 4 hours earlier.
Area forecast discussion, Apr 14, 11:20 AM CDT, 4 hours before
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</html>In the hours before
Special weather statement, Apr 14, 12:30 PM CDT, 2 hours 50 minutes before
OKZ004>048-050>052-TXZ083>090-142100- THUNDERSTORM OUTLOOK NATIONAL WEATHER SERVICE NORMAN OK 1230 PM CDT TUE APR 14 1998 THERE IS A MODERATE RISK OF SEVERE THUNDERSTORMS EAST OF A LINE FROM DURANT TO PONCA CITY LATE THIS AFTERNOON AND TONIGHT. THERE IS A SLIGHT RISK OF SEVERE THUNDERSTORMS ACROSS THAT PART OF OKLAHOMA AND WESTERN NORTH TEXAS EAST OF A LINE FROM MEDFORD TO SEYMOUR TEXAS. THE PRIMARY THREAT IS LARGE HAIL AND DAMAGING WINDS ALTHOUGH ISOLATED TORNADOES ARE POSSIBLE ESPECIALLY IN THE MODERATE RISK AREA. DISCUSSION...A SURFACE LOW PRESSURE AREA DEVELOPING OVER SOUTHWEST KANSAS THIS AFTERNOON WILL CONTINUE TO BRING MOISTURE INTO CENTRAL OKLAHOMA TODAY. APPROACHING MID-LEVEL ENERGY AND THE ASSOCIATED JET OVER NORTHERN NEW MEXICO EARLY THIS AFTERNOON WILL INCREASE THE LIFT REQUIRED FOR THUNDERSTORM DEVELOPMENT OVER NORTHWESTERN PARTS OF THE RISK AREA BY LATE AFTERNOON OR EARLY EVENING. A DRYLINE...STRETCHING SOUTHWEST FROM THE LOW...WILL BE THE FOCUS FOR THUNDERSTORM DEVELOPMENT. ATMOSPHERIC TEMPERATURE PROFILES WILL INITIALLY BE MORE CONDUCIVE FOR THUNDERSTORM DEVELOPMENT FARTHER NORTH IN THE RISK AREA AND ACROSS KANSAS. THUNDERSTORMS ARE EXPECTED TO DEVELOP ACROSS PARTS OF SOUTHERN KANSAS AND NORTHERN OKLAHOMA BY LATE AFTERNOON OR EARLY EVENING. THE AXIS OF GREATEST SURFACE MOISTURE AND A MORE FAVORABLE WIND PROFILE FOR SEVERE STORMS EXIST ACROSS THE MODERATE RISK AREA WHICH INCLUDES AREAS NORTH...EAST...AND SOUTHEAST OF THE OKLAHOMA CITY AREA. ISOLATED TORNADOES ARE POSSIBLE IN THESE AREAS. LARGE HAIL AND DAMAGING WINDS ARE THE PRIMARY THREATS WITH ANY SEVERE STORMS ACROSS THE SLIGHT RISK AREA. WR
Special weather statement, Apr 14, 12:30 PM CDT, 2 hours 50 minutes before
OKZ004>048-050>052-TXZ083>090-142100- THUNDERSTORM OUTLOOK NATIONAL WEATHER SERVICE NORMAN OK 1230 PM CDT TUE APR 14 1998 THERE IS A MODERATE RISK OF SEVERE THUNDERSTORMS EAST OF A LINE FROM DURANT TO PONCA CITY LATE THIS AFTERNOON AND TONIGHT. THERE IS A SLIGHT RISK OF SEVERE THUNDERSTORMS ACROSS THAT PART OF OKLAHOMA AND WESTERN NORTH TEXAS EAST OF A LINE FROM MEDFORD TO SEYMOUR TEXAS. THE PRIMARY THREAT IS LARGE HAIL AND DAMAGING WINDS ALTHOUGH ISOLATED TORNADOES ARE POSSIBLE ESPECIALLY IN THE MODERATE RISK AREA. DISCUSSION...A SURFACE LOW PRESSURE AREA DEVELOPING OVER SOUTHWEST KANSAS THIS AFTERNOON WILL CONTINUE TO BRING MOISTURE INTO CENTRAL OKLAHOMA TODAY. APPROACHING MID-LEVEL ENERGY AND THE ASSOCIATED JET OVER NORTHERN NEW MEXICO EARLY THIS AFTERNOON WILL INCREASE THE LIFT REQUIRED FOR THUNDERSTORM DEVELOPMENT OVER NORTHWESTERN PARTS OF THE RISK AREA BY LATE AFTERNOON OR EARLY EVENING. A DRYLINE...STRETCHING SOUTHWEST FROM THE LOW...WILL BE THE FOCUS FOR THUNDERSTORM DEVELOPMENT. ATMOSPHERIC TEMPERATURE PROFILES WILL INITIALLY BE MORE CONDUCIVE FOR THUNDERSTORM DEVELOPMENT FARTHER NORTH IN THE RISK AREA AND ACROSS KANSAS. THUNDERSTORMS ARE EXPECTED TO DEVELOP ACROSS PARTS OF SOUTHERN KANSAS AND NORTHERN OKLAHOMA BY LATE AFTERNOON OR EARLY EVENING. THE AXIS OF GREATEST SURFACE MOISTURE AND A MORE FAVORABLE WIND PROFILE FOR SEVERE STORMS EXIST ACROSS THE MODERATE RISK AREA WHICH INCLUDES AREAS NORTH...EAST...AND SOUTHEAST OF THE OKLAHOMA CITY AREA. ISOLATED TORNADOES ARE POSSIBLE IN THESE AREAS. LARGE HAIL AND DAMAGING WINDS ARE THE PRIMARY THREATS WITH ANY SEVERE STORMS ACROSS THE SLIGHT RISK AREA. WR
The office that day
Everything else NWS Norman, OK issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Apr 14, 3:54 PM CDT | Severe Thunderstorm Warning | OUN | Caddo, Kiowa | 51 min |
| Apr 14, 4:07 PM CDT | Severe Thunderstorm Warning | OUN | Caddo, Canadian | 48 min |
| Apr 14, 4:38 PM CDT | Severe Thunderstorm Warning | OUN | Caddo | 52 min |
| Apr 14, 4:50 PM CDT | Severe Thunderstorm Warning | OUN | Grady | 40 min |
| Apr 14, 4:54 PM CDT | Tornado Warning | OUN | Caddo | 36 min |
| Apr 14, 5:23 PM CDT | Severe Thunderstorm Warning | OUN | Garvin, Grady, McClain | 42 min |
| Apr 14, 5:35 PM CDT | Severe Thunderstorm Warning | OUN | Tillman | 25 min |
| Apr 14, 5:55 PM CDT | Severe Thunderstorm Warning | OUN | Cotton, Tillman | 50 min |
| Apr 14, 5:59 PM CDT | Severe Thunderstorm Warning | OUN | Garvin, McClain | 46 min |
| Apr 14, 6:20 PM CDT | Severe Thunderstorm Warning | OUN | Noble | 25 min |
| Apr 14, 6:28 PM CDT | Severe Thunderstorm Warning | OUN | Stephens | 47 min |
| Apr 14, 6:42 PM CDT | Severe Thunderstorm Warning | OUN | Garvin, Murray, Pontotoc | 33 min |
| Apr 14, 6:06 PM CDT | Severe Thunderstorm Warning | OUN | Archer | 34 min |
Nearby
Severe Thunderstorm Warnings in Oklahoma, 1998Every severe thunderstorm warning in 1998
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.