Alert archive / Oklahoma / Severe Thunderstorm Warnings in 1998

Severe Thunderstorm Warning 238, NWS Tulsa, OK

May 25, 1998Osage County, Pawnee County, Oklahoma

NWS Tulsa, OK issued this severe thunderstorm warning at May 25, 1998, 4:10 AM CDT for Osage County, Pawnee County, Oklahoma. It was in force for 50 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 25, 1998, 4:10 AM CDT (09:10 UTC)
Expired
May 25, 1998, 5:00 AM CDT
In force
50 min
Issued by
NWS Tulsa, OK
Area
Whole counties

Counties Osage County, OK, Pawnee County, OK

The radar

The Tulsa radar (KINX), 94 km from the middle of the area, began a volume at 09:14 UTC, the scan nearest the moment this went out.

Open the radar archive at this moment

The archived warnings, watches and discussions in force at that minute are drawn over the scan, this one among them.

What was reported inside it

TimeReportWhereRemark
May 25, 5:00 AM CDTHail 0.75Cleveland, 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 watch it was issued in

The SPC watch in force over the same counties when this warning went out.

IssuedProductOfficeLasted
May 25, 2:45 AM CDTSevere Thunderstorm WatchSPC6 hr

The nearest sounding before it

Norman, OK (KOUN), launched 00:00Z, 9.2 hours before the alert went out and 159 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-pSkew-T log-p diagram, Norman, OK at 00:00Z on 1998-05-25Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 3427 joules per kilogram.LCLLFCEL10008507005003002001001 km2 km3 km6 km9 km12 km15 km-30°-20°-10°0°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Norman, OK at 00:00Z on 1998-05-25The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 75 square meters per square second.19395878Sfc1 km3 km6 km9 kmRMLM
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
3427 J/kg
Mixed-layer CIN
-40 J/kg
Mixed-layer LCL
1455 m above ground
0-6 km bulk shear
41 kt
0-1 km storm-relative helicity
75 m²/s²
0-3 km storm-relative helicity
162 m²/s²
Significant tornado parameter
1.4
Supercell composite
16.4

Open this sounding in Storm Lab

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 Tulsa, OK wrote its last area forecast discussion before this severe thunderstorm warning went out at May 24, 11:11 PM CDT, 4 hours 59 minutes earlier.

Area forecast discussion, May 24, 11:11 PM CDT, 4 hours 59 minutes before
FPUS3 KTUL 250415
AFDTUL

EASTERN OKLAHOMA/NORTHWEST ARKANSAS FORECAST DISCUSSION
NATIONAL WEATHER SERVICE TULSA OK
1111 PM CDT SUN MAY 24 1998

UPDATED ZNS TO ISSUE FLASH FLOOD WATCH FOR NE OK OVERNIGHT.
SLOW MVNG TSRA EXPECTED TO CONT TO TRAIN OVER SAME AREAS N
OF SFC FNT. ZNS ALREADY ISSUED. FFA OUT SOON.
FCSTID = 13

.TUL...
OK...FLASH FLOOD WATCH FOR TONIGHT FOR ZONES OKZ054>063...OKZ067>069.

AR...NONE.

In the hours before

Local storm report, May 24, 11:21 PM CDT, 4 hours 49 minutes before
STORM REPORT
NATIONAL WEATHER SERVICE TULSA, OK
1120 PM CST SUN MAY 24 1998

TIME(CDT)  .....CITY LOCATION..... STATE  ...EVENT/REMARKS...
           ....COUNTY LOCATION....

1106 PM    5 NW PAWHUSKA     B        OK   70 MPH WIND GUST
05/24/98   OSAGE
Local storm report, May 24, 11:31 PM CDT, 4 hours 39 minutes before
STORM REPORT
NATIONAL WEATHER SERVICE TULSA, OK
1130 PM CST SUN MAY 24 1998

TIME(CDT)  .....CITY LOCATION..... STATE  ...EVENT/REMARKS...
           ....COUNTY LOCATION....

1125 PM    COPAN             l        OK   60 MPH WIND GUST
05/24/98   OSAGE
Local storm report, May 25, 12:20 AM CDT, 3 hours 50 minutes before
STORM REPORT
NATIONAL WEATHER SERVICE TULSA, OK
1120 PM CST SUN MAY 24 1998

TIME(CDT)  .....CITY LOCATION..... STATE  ...EVENT/REMARKS...
           ....COUNTY LOCATION....

1106 PM    5 NW PAWHUSKA             OK   70 MPH WIND GUST
05/24/98   OSAGE
Local storm report, May 25, 12:27 AM CDT, 3 hours 43 minutes before
STORM REPORT
NATIONAL WEATHER SERVICE TULSA, OK
1220 AM CST MON MAY 25 1998

TIME(CDT)  .....CITY LOCATION..... STATE  ...EVENT/REMARKS...
           ....COUNTY LOCATION....

1210 AM    NOWATA                    OK   60 MPH WIND GUST
05/25/98   NOWATA
Local storm report, May 25, 12:30 AM CDT, 3 hours 40 minutes before
STORM REPORT
NATIONAL WEATHER SERVICE TULSA, OK
1130 PM CST SUN MAY 24 1998

TIME(CDT)  .....CITY LOCATION..... STATE  ...EVENT/REMARKS...
           ....COUNTY LOCATION....

1125 PM    COPAN                     OK   60 MPH WIND GUST
05/24/98   OSAGE
Local storm report, May 25, 1:20 AM CDT, 2 hours 50 minutes before
STORM REPORT
NATIONAL WEATHER SERVICE TULSA, OK
1220 AM CST MON MAY 25 1998

TIME(CDT)  .....CITY LOCATION..... STATE  ...EVENT/REMARKS...
           ....COUNTY LOCATION....

1210 AM    NOWATA                    OK   60 MPH WIND GUST
05/25/98   NOWATA

The office that day

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

IssuedProductOfficeCountiesLasted
May 24, 8:53 PM CDTTornado WarningTSAOsage52 min
May 24, 9:12 PM CDTSevere Thunderstorm WarningTSANowata63 min
May 24, 9:34 PM CDTTornado WarningTSANowata41 min
May 24, 9:40 PM CDTTornado WarningTSAOsage65 min
May 24, 9:53 PM CDTSevere Thunderstorm WarningTSACraig37 min
May 24, 10:43 PM CDTTornado WarningTSAOsage62 min
May 24, 10:57 PM CDTSevere Thunderstorm WarningTSACraig48 min
May 24, 11:25 PM CDTSevere Thunderstorm WarningTSANowata, Washington50 min
May 24, 11:46 PM CDTSevere Thunderstorm WarningTSAOsage44 min
May 25, 12:13 AM CDTFlash Flood WarningTSAOsage2 hr
May 25, 12:19 AM CDTSevere Thunderstorm WarningTSACraig41 min
May 25, 12:32 AM CDTSevere Thunderstorm WarningTSAOsage43 min
May 25, 12:43 AM CDTSevere Thunderstorm WarningTSADelaware, Ottawa47 min
May 25, 1:12 AM CDTSevere Thunderstorm WarningTSAOsage, Washington48 min
May 25, 1:31 AM CDTSevere Thunderstorm WarningTSANowata, Rogers44 min
May 25, 2:25 AM CDTSevere Thunderstorm WarningTSAMayes50 min
May 25, 2:54 AM CDTSevere Thunderstorm WarningTSADelaware36 min
May 25, 4:59 AM CDTSevere Thunderstorm WarningTSAOsage, Pawnee46 min
May 25, 6:01 AM CDTSevere Thunderstorm WarningTSATulsa44 min
May 25, 2:38 AM CDTSevere Thunderstorm WarningTSABenton37 min
May 25, 3:07 AM CDTSevere Thunderstorm WarningTSACarroll, Madison38 min
May 25, 3:15 AM CDTTornado WarningTSAMadison45 min
May 25, 3:39 AM CDTSevere Thunderstorm WarningTSACarroll36 min
May 25, 3:47 AM CDTSevere Thunderstorm WarningTSAWashington58 min
May 25, 5:16 AM CDTSevere Thunderstorm WarningTSAFranklin44 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; radar from the NEXRAD Level II archive.