Alert archive / Oklahoma / Severe Thunderstorm Warnings in 1998

Severe Thunderstorm Warning 239, NWS Tulsa, OK

May 25, 1998Osage County, Pawnee County, Oklahoma

NWS Tulsa, OK issued this severe thunderstorm warning at May 25, 1998, 4:59 AM CDT for Osage County, Pawnee County, Oklahoma. It was in force for 46 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, 4:59 AM CDT (09:59 UTC)
Expired: May 25, 1998, 5:45 AM CDT
In force: 46 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 09:58 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, 5:00 AM CDT	Hail 0.75	Cleveland, 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 25, 2:45 AM CDT	Severe Thunderstorm Watch	SPC	6 hr

The nearest sounding before it

Norman, OK (KOUN), launched 00:00Z, 10.0 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-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.

620 
WUUS54 KTSA 251000 RRA
SVRTUL
OKC113-117-251045-

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

THE NATIONAL WEATHER SERVICE IN TULSA HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...

  SOUTHEASTERN OSAGE COUNTY IN NORTHEASTERN OKLAHOMA
  EASTERN PAWNEE COUNTY IN NORTHEASTERN OKLAHOMA

* UNTIL 545 AM CDT

* AT 455 AM...NATIONAL WEATHER SERVICE DOPPLER RADAR DETECTED A
  SEVERE THUNDERSTORM NEAR TERLTON...MOVING NORTHEAST AT 25 MPH.

* SOME LOCATIONS AFFECTED INCLUDE...
  WESTPORT
  PRUE
  WESTERN PART OF KEYSTONE LAKE

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



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 25, 4:15 AM CDT, 44 minutes earlier.

Area forecast discussion, May 25, 4:15 AM CDT, 44 minutes before

EASTERN OKLAHOMA/NORTHWEST ARKANSAS FORECAST DISCUSSION
NATIONAL WEATHER SERVICE TULSA OK
415 AM CDT MON MAY 25 1998

RUNNING BEHIND THIS MRNG DUE TO SVR WX.

LATEST SFC ANALYSIS SHOWS WELL-DEFINED OUTFLOW BNDRY FM NW AR THRU
SRN OK...WITH SYNOPTIC SCALE SFC FNT ACRS NW OK.  ADDITIONAL
CONVECTION HAS DVLPD ACRS WRN OK...JUST S OF FNT...WITH ACTIVITY
CURRENTLY MVG BACK INTO WRN PORTIONS OF CWA.  THINK PCPN WL GRADUALLY
DIMINISH LTR THIS MRNG...BUT DON'T PLAN ON GETTING TOO FANCY WITH
TIMING.

MDLS GENERALLY AGREE THAT SFC FNT/OUTFLOW WL SETTLE OVR SE OK LATE
TDA.  CUD SEE SOME REDEVELOPMENT LTR THIS AFTN AND OVERNGT ESP ACRS
SERN ZNS...AS UPR VORT CURRENTLY OVR NRN MX MVS INTO RGN.

AVN SUGGESTS BNDRY WL REMAIN OVR SE OK ON TUE...THEN LIFT NWD TUE NGT
INTO WED.  WL KP LO POPS IN FOR SERN SECTIONS ON TUE...THEN SPREAD
POPS ACRS ENTIRE FA TUE NGT INTO WED.

FCSTID = 18
TUL   83  62  85  65 /  50  10  10  20
FSM   85  64  86  65 /  50  20  20  20
MLC   85  64  86  66 /  50  20  20  20
BVO   82  60  84  64 /  50  10  10  20
FYV   80  60  83  60 /  50  20  10  20
IDB   87  65  88  66 /  40  30  30  20
BYV   80  60  83  60 /  50  20  10  20
MIO   80  60  83  62 /  D50  10  10  20
MKO   83  62  85  65 /  50  10  10  20
F10   83  62  85  65 /  50  10  10  20
HHW   87  65  88  66 /  40  30  30  20

.TUL...
OK...NONE.
AR...NONE.

In the hours before

Local storm report, May 24, 11:21 PM CDT, 5 hours 38 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, 5 hours 28 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, 4 hours 39 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, 4 hours 32 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, 4 hours 29 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, 3 hours 39 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.

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, 12:32 AM CDT	Severe Thunderstorm Warning	TSA	Osage	43 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, 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.