Alert archive / Oklahoma / Severe Thunderstorm Warnings in 1998

Severe Thunderstorm Warning 228, NWS Tulsa, OK

May 25, 1998Osage County, Oklahoma

NWS Tulsa, OK issued this severe thunderstorm warning at May 25, 1998, 12:32 AM CDT for Osage County, Oklahoma. It was in force for 43 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: May 25, 1998, 12:32 AM CDT (05:32 UTC)
Expired: May 25, 1998, 1:15 AM CDT
In force: 43 min
Issued by: NWS Tulsa, OK
Area: Whole counties

County Osage County, OK

The radar

The Tulsa radar (KINX), 90 km from the middle of the area, began a volume at 05:36 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

Time	Report	Where	Remark
May 25, 12:36 AM CDT	Thunderstorm Wind 52	Hominy, OK
May 25, 1:15 AM CDT	Thunderstorm Wind 52	Avant, 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.

Issued	Product	Office	Lasted
May 24, 8:15 PM CDT	Tornado Watch	SPC	7 hr

The nearest sounding before it

Norman, OK (KOUN), launched 00:00Z, 5.5 hours before the alert went out and 181 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-p

Temperature in red, dew point in green, the mixed-layer parcel dashed.

Hodograph

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

As transmitted, in the capitals the NWS used until 2016.

369 
WUUS54 KTSA 250534 RRA
SVRTUL
OKC113-250615-

BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE TULSA OK
1232 AM CDT MON MAY 25 1998

THE NATIONAL WEATHER SERVICE IN TULSA HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...

  OSAGE COUNTY IN NORTHEASTERN OKLAHOMA

* UNTIL 115 AM CDT

* AT 1230 AM...NATIONAL WEATHER SERVICE DOPPLER RADAR DETECTED A
  LINE OF SEVERE THUNDERSTORMS FROM PEARSONIA TO 5 MILES SOUTHEAST
  OF FAIRFAX...MOVING EAST AT 25 MPH.

* SOME LOCATIONS AFFECTED INCLUDE...
  PAWHUSKA
  HOMINY
  WYNONA

  HAIL TO THE SIZE OF NICKELS AND WIND GUSTS TO 60 MPH CAN BE
  EXPECTED IN THE WARNED AREA.

A TORNADO WATCH IS ALSO IN EFFECT. TORNADOES CAN DEVELOP SUDDENLY
FROM SEVERE THUNDERSTORMS. BE ALERT FOR RAPIDLY CHANGING WEATHER
CONDITIONS.

BE ALERT TO RAPIDLY CHANGING WEATHER CONDITIONS AS STORMS APPROACH.

WHEN THUNDERSTORMS APPROACH...TAKE COVER INSIDE A STURDY BUILDING.
STAY AWAY FROM WINDOWS. TO PROTECT YOURSELF FROM LIGHTNING STAY OFF
THE PHONE AND DONT USE HAND HELD ELECTRICAL APPLIANCES. MOTORISTS
SHOULD NEVER DRIVE INTO AREAS WHERE WATER COVERS THE ROAD.

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, 1 hour 21 minutes earlier.

Area forecast discussion, May 24, 11:11 PM CDT, 1 hour 21 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, 10:55 PM CDT, 1 hour 37 minutes before

STORM REPORT
NATIONAL WEATHER SERVICE TULSA, OK
1055 PM CDT SUN MAY 24 1998

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

1005 PM    FORAKER                   OK   1.00 INCH HAIL
05/24/98   NOWATA

Local storm report, May 24, 11:21 PM CDT, 1 hour 11 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, 1 hour 1 minute 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, 12 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, 5 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, 2 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

The office that day

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

Issued	Product	Office	Counties	Lasted
May 24, 8:53 PM CDT	Tornado Warning	TSA	Osage	52 min
May 24, 9:12 PM CDT	Severe Thunderstorm Warning	TSA	Nowata	63 min
May 24, 9:34 PM CDT	Tornado Warning	TSA	Nowata	41 min
May 24, 9:40 PM CDT	Tornado Warning	TSA	Osage	65 min
May 24, 9:53 PM CDT	Severe Thunderstorm Warning	TSA	Craig	37 min
May 24, 10:43 PM CDT	Tornado Warning	TSA	Osage	62 min
May 24, 10:57 PM CDT	Severe Thunderstorm Warning	TSA	Craig	48 min
May 24, 11:25 PM CDT	Severe Thunderstorm Warning	TSA	Nowata, Washington	50 min
May 24, 11:46 PM CDT	Severe Thunderstorm Warning	TSA	Osage	44 min
May 25, 12:13 AM CDT	Flash Flood Warning	TSA	Osage	2 hr
May 25, 12:19 AM CDT	Severe Thunderstorm Warning	TSA	Craig	41 min
May 25, 12:43 AM CDT	Severe Thunderstorm Warning	TSA	Delaware, Ottawa	47 min
May 25, 1:12 AM CDT	Severe Thunderstorm Warning	TSA	Osage, Washington	48 min
May 25, 1:31 AM CDT	Severe Thunderstorm Warning	TSA	Nowata, Rogers	44 min
May 25, 2:25 AM CDT	Severe Thunderstorm Warning	TSA	Mayes	50 min
May 25, 2:54 AM CDT	Severe Thunderstorm Warning	TSA	Delaware	36 min
May 25, 4:10 AM CDT	Severe Thunderstorm Warning	TSA	Osage, Pawnee	50 min
May 25, 4:59 AM CDT	Severe Thunderstorm Warning	TSA	Osage, Pawnee	46 min
May 25, 6:01 AM CDT	Severe Thunderstorm Warning	TSA	Tulsa	44 min

Nearby

Severe Thunderstorm Warnings in Oklahoma, 1998 Every 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.