Alert archive / Oklahoma / Severe Thunderstorm Warnings in 1998

Severe Thunderstorm Warning 241, NWS Tulsa, OK

May 25, 1998Tulsa County, Oklahoma

NWS Tulsa, OK issued this severe thunderstorm warning at May 25, 1998, 6:01 AM CDT for Tulsa County, Oklahoma. It was in force for 44 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, 6:01 AM CDT (11:01 UTC)
Expired: May 25, 1998, 6:45 AM CDT
In force: 44 min
Issued by: NWS Tulsa, OK
Area: Whole counties

County Tulsa County, OK

The radar

The Tulsa radar (KINX), 34 km from the middle of the area, began a volume at 11:03 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, 6:10 AM CDT	Hail 0.75	Bixby, OK
May 25, 6:12 AM CDT	Thunderstorm Wind	Glenpool, OK	Large tree limbs blown down

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, 11.0 hours before the alert went out and 166 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.

985 
WUUS54 KTSA 251103 RRA
SVRTUL
OKC143-251145-

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

THE NATIONAL WEATHER SERVICE IN TULSA HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...

  TULSA COUNTY IN NORTHEASTERN OKLAHOMA

* UNTIL 645 AM CDT

* AT 559 AM...NATIONAL WEATHER SERVICE DOPPLER RADAR DETECTED A
  SEVERE THUNDERSTORM OVER DOWNTOWN TULSA...MOVING EAST AT 10 MPH.

* SOME LOCATIONS AFFECTED INCLUDE...
  TULSA
  OWASSO
  BROKEN ARROW

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



TORRENTIAL RAINS MAY CAUSE PONDING OF WATER ON ROADWAYS. DONT
DRIVE INTO AREAS WHERE WATER COVERS THE ROAD.

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, 1 hour 46 minutes earlier.

Area forecast discussion, May 25, 4:15 AM CDT, 1 hour 46 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 25, 12:20 AM CDT, 5 hours 41 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 hours 34 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, 5 hours 31 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, 4 hours 41 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

Special weather statement, May 25, 6:00 AM CDT, 1 minute before

ARZ001-002-010-011-019-020-029-OKZ049-053>076-261200-

EASTERN OKLAHOMA/NORTHWEST ARKANSAS HAZARDOUS WEATHER OUTLOOK
NATIONAL WEATHER SERVICE TULSA OK
600 AM CDT MON MAY 25 1998

A FEW SEVERE THUNDERSTORMS ARE EXPECTED ACROSS NORTHEAST OKLAHOMA AND
NORTHWEST ARKANSAS THIS MORNING.  ISOLATED SEVERE THUNDERSTORMS ARE
POSSIBLE LATE THIS AFTERNOON ACROSS SOUTHEAST OKLAHOMA AND WEST CENTRAL
ARKANSAS.

AT 600 AM...SURFACE LOW PRESSURE WAS LOCATED NEAR FREDRICK OKLAHOMA WITH
A WARM FRONT EXTENDING NORTHEAST JUST NORTH OF MCALESTER TO NEAR FORT
SMITH ARKANSAS.  SEVERAL OUTFLOW BOUNDARIES ALSO EXISTED ACROSS
NORTHEAST OKLAHOMA AND NORTHWEST ARKANSAS PROVIDING FOCAL POINTS FOR
THUNDERSTORM DEVELOPMENT THIS MORNING.  SOME STORMS HAVE BEEN SEVERE
DURING THE EARLY MORNING HOURS NORTH OF A LINE FROM SAND SPRINGS TO
FAYETTEVILLE.

SOUTH OF THE WARM FRONT...WARM MOIST AIR REMAINS IN PLACE.  COOLING
ALOFT HAS ALLOWED THE MID LEVEL CAP TO ERODE SUCH THAT IT IS NOT MUCH OF
A FACTOR FOR TODAY.

ONGOING CONVECTION THIS MORNING WILL CONTINUE TO MOVE TO THE EAST-
SOUTHEAST ACROSS THE AREA.  SOME OF THE STORMS MAY BE SEVERE WITH
DAMAGING WINDS AND LARGE HAIL AS THE MAIN THREAT.  THIS AFTERNOON...
OUTFLOW BOUNDARIES FROM THIS MORNINGS CONVECTION WILL HAVE MOVED FURTHER
SOUTH INTO SOUTHEAST OKLAHOMA AND WEST CENTRAL ARKANSAS.  SOUTHERLY
WINDS WILL CONTINUE TO PULL WARM MOIST AIR NORTHWARD INTO THESE
BOUNDARIES AIDING IN THE DEVELOPMENT OF SHOWERS AND THUNDERSTORMS AGAIN
BY LATE AFTERNOON.  SOME OF THESE STORMS MAY BECOME SEVERE GENERALLY
SOUTH OF A MCALESTER TO FORT SMITH LINE WITH DAMAGING WINDS AND LARGE
HAIL BEING THE MAIN THREAT.

EMERGENCY MANAGEMENT AGENCIES AND STORM SPOTTER GROUPS IN NORTHEAST
OKLAHOMA AND NORTHWEST ARKANSAS SHOULD MONITOR THE LATEST FORECASTS AND
STATEMENTS FROM THE NATIONAL WEATHER SERVICE IN TULSA AND BE READY FOR
ACTIVATION THIS MORNING AND POSSIBLY AGAIN LATE THIS AFTERNOON.

Special weather statement, May 25, 6:00 AM CDT, 1 minute before

ARZ001-002-010-011-019-020-029-OKZ049-053>076-261200-

EASTERN OKLAHOMA/NORTHWEST ARKANSAS HAZARDOUS WEATHER OUTLOOK
NATIONAL WEATHER SERVICE TULSA OK
600 AM CDT MON MAY 25 1998

A FEW SEVERE THUNDERSTORMS ARE EXPECTED ACROSS NORTHEAST OKLAHOMA AND
NORTHWEST ARKANSAS THIS MORNING.  ISOLATED SEVERE THUNDERSTORMS ARE
POSSIBLE LATE THIS AFTERNOON ACROSS SOUTHEAST OKLAHOMA AND WEST CENTRAL
ARKANSAS.

AT 600 AM...SURFACE LOW PRESSURE WAS LOCATED NEAR FREDRICK OKLAHOMA WITH
A WARM FRONT EXTENDING NORTHEAST JUST NORTH OF MCALESTER TO NEAR FORT
SMITH ARKANSAS.  SEVERAL OUTFLOW BOUNDARIES ALSO EXISTED ACROSS
NORTHEAST OKLAHOMA AND NORTHWEST ARKANSAS PROVIDING FOCAL POINTS FOR
THUNDERSTORM DEVELOPMENT THIS MORNING.  SOME STORMS HAVE BEEN SEVERE
DURING THE EARLY MORNING HOURS NORTH OF A LINE FROM SAND SPRINGS TO
FAYETTEVILLE.

SOUTH OF THE WARM FRONT...WARM MOIST AIR REMAINS IN PLACE.  COOLING
ALOFT HAS ALLOWED THE MID LEVEL CAP TO ERODE SUCH THAT IT IS NOT MUCH OF
A FACTOR FOR TODAY.

ONGOING CONVECTION THIS MORNING WILL CONTINUE TO MOVE TO THE EAST-
SOUTHEAST ACROSS THE AREA.  SOME OF THE STORMS MAY BE SEVERE WITH
DAMAGING WINDS AND LARGE HAIL AS THE MAIN THREAT.  THIS AFTERNOON...
OUTFLOW BOUNDARIES FROM THIS MORNINGS CONVECTION WILL HAVE MOVED FURTHER
SOUTH INTO SOUTHEAST OKLAHOMA AND WEST CENTRAL ARKANSAS.  SOUTHERLY
WINDS WILL CONTINUE TO PULL WARM MOIST AIR NORTHWARD INTO THESE
BOUNDARIES AIDING IN THE DEVELOPMENT OF SHOWERS AND THUNDERSTORMS AGAIN
BY LATE AFTERNOON.  SOME OF THESE STORMS MAY BECOME SEVERE GENERALLY
SOUTH OF A MCALESTER TO FORT SMITH LINE WITH DAMAGING WINDS AND LARGE
HAIL BEING THE MAIN THREAT.

EMERGENCY MANAGEMENT AGENCIES AND STORM SPOTTER GROUPS IN NORTHEAST
OKLAHOMA AND NORTHWEST ARKANSAS SHOULD MONITOR THE LATEST FORECASTS AND
STATEMENTS FROM THE NATIONAL WEATHER SERVICE IN TULSA AND BE READY FOR
ACTIVATION THIS MORNING AND POSSIBLY AGAIN LATE THIS AFTERNOON.

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, 4:59 AM CDT	Severe Thunderstorm Warning	TSA	Osage, Pawnee	46 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.