Alert archive / Oklahoma / Severe Thunderstorm Warnings in 1998

Severe Thunderstorm Warning 421, NWS Tulsa, OK

August 28, 1998Okfuskee County, Oklahoma

NWS Tulsa, OK issued this severe thunderstorm warning at Aug 28, 1998, 7:14 PM CDT for Okfuskee County, Oklahoma. It was in force for 31 min. 1 report came from inside the area while it was in force.

The area

The outline the Iowa Environmental Mesonet reconstructed for it; the warning itself named whole counties, with what was reported inside it.

The facts

Issued
Aug 28, 1998, 7:14 PM CDT (00:14 UTC)
Expired
Aug 28, 1998, 7:45 PM CDT
In force
31 min
Issued by
NWS Tulsa, OK
Area
Whole counties; the outline is the Mesonet’s reconstruction

County Okfuskee County, OK

What was reported inside it

TimeReportWhereRemark
Aug 28, 7:19 PM CDTThunderstorm Wind 52Boley, OKAt the correctional facility in Boley.

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 00:00Z, 0.2 hours before the alert went out and 91 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 1998-08-29Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 1673 joules per kilogram.LCLEL10008507005003002001001 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 1998-08-29The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 38 square meters per square second.1939Sfc1 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
1673 J/kg
Mixed-layer CIN
-11 J/kg
Mixed-layer LCL
1924 m above ground
0-6 km bulk shear
15 kt
0-1 km storm-relative helicity
38 m²/s²
0-3 km storm-relative helicity
66 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.0

Open this sounding in Storm Lab

The text

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

553 
WUUS54 KTSA 290016 RRA
SVRTUL
OKC107-290045-

BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE TULSA OK
714 PM CDT FRI AUG 28 1998

THE NATIONAL WEATHER SERVICE IN TULSA HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR
     WESTERN OKFUSKEE COUNTY IN EAST CENTRAL OKLAHOMA

* UNTIL 745 PM CDT

* AT 714 PM CDT RADAR INDICATED A SEVERE THUNDERSTORM OVER BOLEY...
  MOVING SOUTH AT 15 MILES PER HOUR.

* SOME LOCATIONS AFFECTED INCLUDE...BOLEY...CASTLE...BEARDEN AND   
OKEMAH

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

LAT...LON 3550 9656 3531 9642 3530 9624 3557 9638
          3556 9651

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 Aug 28, 3:15 PM CDT, 3 hours 59 minutes earlier.

Area forecast discussion, Aug 28, 3:15 PM CDT, 3 hours 59 minutes before
EASTERN OKLAHOMA/NORTHWEST ARKANSAS FORECAST DISCUSSION
NATIONAL WEATHER SERVICE TULSA OK
315 PM CDT FRI AUG 28 1998

PROBLEM(S) OF THE DAY:
POPS
TEMPERATURES

18Z SURFACE ANALYSIS SHOWED COLD FRONT FROM SOUTHEAST KANSAS INTO
NORTH CENTRAL OKLAHOMA EXTENDING INTO THE TEXAS PANHANDLE.  FRONT
ALSO EVIDENT NOW ON KINX REFLECTIVITY IMAGERY WITH ISOLATED
THUNDERSTORMS ACROSS NORTHWEST SECTIONS OF THE FORECAST AREA.  WATER
VAPOR IMAGERY SHOWING MID LEVEL DRY AIR PUSHING SOUTH INTO REGION
BEHIND SHORTWAVE. MORE SIGNIFICANT SHOWER AND THUNDERSTORM ACTIVITY
OCCURRING ACROSS FAR SOUTHEAST ZONES 100 DEGREE AIR AHEAD OF CLOUD
SHIELD FROM LAST NIGHTS CONVECTION.

SURFACE FRONT SHOULD MOVE THROUGH THE FORECAST AREA TONIGHT WITH
BEST THREAT FOR THUNDERSTORMS ACROSS THE SOUTHEAST. WILL GO WITH
ISOLATED WORDING ACROSS NORTHERN ZONES THIS EVENING FOR FRONTAL
PASSAGE.  TEMPERATURES SHOULD FALL INTO THE UPPER 60S TO LOWER 70S
RANGE WITH NORTH WINDS AND CLEARING SKIES. BOTH THE ETA AND NGM
SIMILAR WITH TRACK OF SHORTWAVE THROUGH FORECAST AREA TONIGHT. UPPER
LEVEL JET PULLS EAST OF AREA BY 6Z. FRONT SLOWS DOWN AS IT MOVES INTO
SOUTHEAST OKLAHOMA WHICH MAY CALL FOR ISOLATED WORDING SATURDAY
AFTERNOON IN SOUTHEAST ZONES. REST OF FORECAST AREA SHOULD BE UNDER
MOSTLY CLEAR SKIES AS LARGE AREA OF SUBSIDENCE MOVES IN BEHIND
SHORTWAVE. WILL GO WITH A MIXTURE OF NGM AND AVN MOS FOR TEMPERATURE
FORECAST THROUGH THE PERIOD.

EXTENDED HAS MRF MOVING SURFACE HIGH PRESSURE OVER THE GREAT LAKES
INTO THE SOUTHEAST WHICH KEEPS OUR FORECAST AREA IN EASTERLY FLOW.
ALTHOUGH MRF DOESN'T GENERATE MUCH PRECIPITATION OVER AREA...SOME
SHOWERS MAY FORM IN THE HIGHER TERRAIN AREAS OF SOUTHEAST OKLAHOMA
AND WESTERN ARKANSAS. SOME MENTION OF THIS IN CURRENT ZONES SO WILL
NOT CHANGE MUCH.

HOWIESON
FCSTID = 44

TUL   70  94  69  93 /  10   5   0   0
FSM   70  93  68  93 /  20   0   0   0
MLC   71  95  68  94 /  20   0   0   0
BVO   69  93  67  92 /  10   0   0   0
FYV   67  90  64  91 /  20   0   0   0
IDB   70  96  67  95 /  30  10   0   0
BYV   67  90  64  91 /  20   0   0   0
MIO   68  92  66  92 /  10   5   0   0
MKO   70  94  69  93 /  10   5   0   0
F10   70  94  69  93 /  10   5   0   0
HHW   70  96  67  95 /  30  10   0   0

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

--------------------
EXPERIMENTAL OUTPUT:

GENERAL WEATHER EXPECTED NEXT 24 HOURS: CONVECTIVE PRECIP
HAZARDOUS WEATHER \EXPECTED NEXT 24 HOURS:  NONE
NGM CONFIDENCE:  8 ON A SCALE OF 0 TO 10
ETA CONFIDENCE:  8 ON A SCALE OF 0 TO 10
AVN CONFIDENCE:  8 ON A SCALE OF 0 TO 10
FCST CONFIDENCE: 8 ON A SCALE OF 0 TO 10

In the hours before

Local storm report, Aug 28, 6:18 PM CDT, 56 minutes before
STORM REPORT
NATIONAL WEATHER SERVICE TULSA OK
618 PM CDT FRI AUG 28 1998

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

0515 PM    TULSA                     OK   WIND DAMAGE
08/28/98   TULSA                          TREE LIMBS DOWN AT 15TH
                                          AND UTICA IN TULSA...A 6
                                          INCH DIAMETER LIMB FELL
                                          ONTO A CAR AT THAT
                                          LOCATION.
Local storm report, Aug 28, 6:18 PM CDT, 56 minutes before
STORM REPORT
NATIONAL WEATHER SERVICE TULSA OK
618 PM CDT FRI AUG 28 1998

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

0515 PM    TULSA                     OK   WIND DAMAGE
08/28/98   TULSA                          TREE LIMBS DOWN AT 15TH
                                          AND UTICA IN TULSA...A 6
                                          INCH DIAMETER LIMB FELL
                                          ONTO A CAR AT THAT
                                          LOCATION.
Local storm report, Aug 28, 6:25 PM CDT, 49 minutes before
PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE TULSA OK
625 PM CDT FRI AUG 28 1998

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

0545 PM    TULSA                     OK   WIND DAMAGE
08/28/98   TULSA                          A TREE WAS BLOWN DOWN IN
                                          SOUTHWEST TULSA.

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.