Alert archive / Oklahoma / Severe Thunderstorm Warnings in 1998

Severe Thunderstorm Warning 79, NWS Tulsa, OK

April 7, 1998Osage County, Oklahoma

NWS Tulsa, OK issued this severe thunderstorm warning at Apr 7, 1998, 12:13 AM CDT for Osage County, Oklahoma. It was in force for 62 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
Apr 7, 1998, 12:13 AM CDT (05:13 UTC)
Expired
Apr 7, 1998, 1:15 AM CDT
In force
62 min
Issued by
NWS Tulsa, OK
Area
Whole counties

County Osage County, OK

What was reported inside it

TimeReportWhereRemark
Apr 7, 12:33 AM CDTHail 0.75Shidler, 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 nearest sounding before it

Norman, OK (KOUN), launched 00:00Z, 5.2 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-pSkew-T log-p diagram, Norman, OK at 00:00Z on 1998-04-07Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 112 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 1998-04-07The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 176 square meters per square second.1939587897117136156Sfc1 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
112 J/kg
Mixed-layer CIN
-164 J/kg
Mixed-layer LCL
1259 m above ground
0-6 km bulk shear
55 kt
0-1 km storm-relative helicity
176 m²/s²
0-3 km storm-relative helicity
216 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.2

Open this sounding in Storm Lab

The text

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

884 
WUUS54 KTSA 070514 RRA
SVRTUL
OKC113-070615-

BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE TULSA OK
1213 AM CDT TUE APR 7 1998

THE NATIONAL WEATHER SERVICE IN TULSA HAS ISSUED A
SEVERE THUNDERSTORM WARNING EFFECTIVE UNTIL 115 AM CDT
FOR PEOPLE IN THE FOLLOWING LOCATION...

IN NORTHEASTERN OKLAHOMA

   ...OSAGE COUNTY


AT 1212 AM WEATHER RADAR INDICATED A SEVERE THUNDERSTORM NEAR
BURBANK.  THE STORM WAS MOVING TO THE NORTHEAST AT 35 MILES AN HOUR.

SHIDLER IS NEAR THE PATH OF THIS STORM.

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

DURING THE STORM MOVE INDOORS AND STAY AWAY FROM WINDOWS. TO PROTECT
YOURSELF FROM LIGHTNING DO NOT USE THE TELEPHONE OR HAND HELD
ELECTRICAL APPLIANCES...UNLESS IN AN EMERGENCY. MOTORISTS SHOULD BE
ALERT FOR WATER ON ROADWAYS AND NEVER DRIVE ONTO A FLOODED 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 Apr 6, 10:25 PM CDT, 1 hour 48 minutes earlier.

Area forecast discussion, Apr 6, 10:25 PM CDT, 1 hour 48 minutes before
FPUS3 KTUL 070329
AFDTUL

EASTERN OKLAHOMA/NORTHWEST ARKANSAS FORECAST DISCUSSION
NATIONAL WEATHER SERVICE TULSA OK
1025 PM CDT MON APR 6 1998

TWEAKED POPS AGAIN AND ADJUSTED WATCH HEADLINES. STORMS SHOWING SIGNS
OF PRODUCING STRONG WINDS...ONE REPORT OF 60 MPH ALREADY. WILL CLEAR
OUT COUNTIES FROM SVR WATCH FROM THE WEST AS THE LINE MOVES BY.

FCSTID = 26
TUL   52  73  50  66 /  80   0  10  40
FSM   53  78  49  71 /  80  10  10  20
MLC   53  79  51  70 /  80   0  10  20
BVO   52  73  50  66 /  80   0  10  40
FYV   54  72  46  67 /  80  10  10  40
IDB   56  82  51  74 /  50   0  10  10
BYV   54  72  46  67 /  80  10  10  40
MIO   53  74  49  66 /  80  10  10  40
MKO   55  77  54  68 /  80   0  10  30
F10   55  77  54  68 /  80   0  10  30
HHW   56  82  51  74 /  50   0  10  10

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

In the hours before

Special weather statement, Apr 6, 9:55 PM CDT, 2 hours 18 minutes before
OKZ049-053-073-075-070252-

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE TULSA OK
955 PM CDT MON APR 6 1998

TORNADO WATCH NUMBER 169 HAS BEEN REPLACED WITH A SEVERE
THUNDERSTORM WATCH IN EFFECT UNTIL 3 AM FOR THE FOLLOWING COUNTIES IN

EASTERN OKLAHOMA...
         CHOCTAW             LATIMER             PITTSBURG
         PUSHMATAHA...

PLEASE REFER TO THE LATEST AREAL OUTLINE PRODUCT /OKCSLSOK/ FOR A
LIST OF COUNTIES IN THE NEW SEVERE THUNDERSTORM WATCH.
Special weather statement, Apr 6, 9:55 PM CDT, 2 hours 18 minutes before
OKZ049-053-073-075-070252-

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE TULSA OK
955 PM CDT MON APR 6 1998

TORNADO WATCH NUMBER 169 HAS BEEN REPLACED WITH A SEVERE
THUNDERSTORM WATCH IN EFFECT UNTIL 3 AM FOR THE FOLLOWING COUNTIES IN

EASTERN OKLAHOMA...
         CHOCTAW             LATIMER             PITTSBURG
         PUSHMATAHA...

PLEASE REFER TO THE LATEST AREAL OUTLINE PRODUCT /OKCSLSOK/ FOR A
LIST OF COUNTIES IN THE NEW SEVERE THUNDERSTORM WATCH.

The office that day

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

IssuedProductOfficeCountiesLasted
Apr 6, 8:01 PM CDTSevere Thunderstorm WarningTSAOsage59 min
Apr 6, 9:02 PM CDTSevere Thunderstorm WarningTSAOkfuskee43 min
Apr 6, 9:04 PM CDTSevere Thunderstorm WarningTSAOsage41 min
Apr 6, 9:39 PM CDTSevere Thunderstorm WarningTSAMcIntosh, Okmulgee51 min
Apr 6, 9:39 PM CDTSevere Thunderstorm WarningTSAPittsburg51 min
Apr 6, 9:42 PM CDTSevere Thunderstorm WarningTSAOsage, Pawnee63 min
Apr 6, 10:29 PM CDTSevere Thunderstorm WarningTSAMcIntosh, Pittsburg46 min
Apr 6, 10:38 PM CDTSevere Thunderstorm WarningTSAHaskell, Muskogee37 min
Apr 6, 10:51 PM CDTSevere Thunderstorm WarningTSASequoyah39 min
Apr 6, 11:04 PM CDTSevere Thunderstorm WarningTSALatimer41 min
Apr 6, 11:08 PM CDTSevere Thunderstorm WarningTSALatimer52 min
Apr 6, 11:11 PM CDTSevere Thunderstorm WarningTSAPittsburg64 min
Apr 6, 11:17 PM CDTSevere Thunderstorm WarningTSAHaskell, LeFlore43 min
Apr 6, 11:18 PM CDTSevere Thunderstorm WarningTSAPittsburg57 min
Apr 6, 11:25 PM CDTSevere Thunderstorm WarningTSAAdair50 min
Apr 6, 11:32 PM CDTSevere Thunderstorm WarningTSASequoyah28 min
Apr 6, 11:39 PM CDTSevere Thunderstorm WarningTSALatimer, Pushmataha36 min
Apr 6, 11:44 PM CDTTornado WarningTSAPittsburg, Pushmataha46 min
Apr 6, 11:54 PM CDTSevere Thunderstorm WarningTSALeFlore66 min
Apr 6, 11:57 PM CDTSevere Thunderstorm WarningTSATulsa33 min
Apr 7, 12:25 AM CDTSevere Thunderstorm WarningTSAWagoner50 min
Apr 7, 12:30 AM CDTSevere Thunderstorm WarningTSAPushmataha30 min
Apr 7, 12:51 AM CDTTornado WarningTSALeFlore39 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.