Alert archive / Oklahoma / Flash Flood Warnings in 1998

Flash Flood Warning 24, NWS Tulsa, OK

June 21, 1998Osage County, Oklahoma

NWS Tulsa, OK issued this flash flood warning at Jun 21, 1998, 1:02 AM CDT for Osage County, Oklahoma. It was in force for 3 hr. No storm report in the archive falls inside the area while it was in force.

The area

The counties it named.

The facts

Issued: Jun 21, 1998, 1:02 AM CDT (06:02 UTC)
Expired: Jun 21, 1998, 4:15 AM CDT
In force: 3 hr
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 06:02 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.

The nearest sounding before it

Norman, OK (KOUN), launched 00:00Z, 6.0 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: 2183 J/kg
Mixed-layer CIN: -239 J/kg
Mixed-layer LCL: 2070 m above ground
0-6 km bulk shear: 28 kt
0-1 km storm-relative helicity: 95 m²/s²
0-3 km storm-relative helicity: 194 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 5.6

Open this sounding in Storm Lab

The text

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

000 
TTAA00 KTUL 210602 RRA
FFWTUL
OKC113-210915-

BULLETIN - EAS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE TULSA OK
102 AM CDT SUN JUN 21 1998

THE NATIONAL WEATHER SERVICE IN TULSA HAS ISSUED A

* FLASH FLOOD WARNING FOR...
  OSAGE COUNTY IN NORTHEASTERN OKLAHOMA

* UNTIL 415 AM CDT

* RADAR INDICATED AN INCH AND A HALF TO TWO INCHES OF RAIN HAD
FALLEN BETWEEN MIDNIGHT AND 100 AM FROM NEAR PONCA CITY TO BETWEEN
FAIRFAX AND BURBANK AND SOUTHEAST TOWARDS WYNONA.  AN ADDITIONAL 1
TO 2 INCHES OF RAIN IS EXPECTED TO FALL AS THESE THUNDERSTORMS
ARE EXPECTED TO PERSIST.  THIS RAINFALL IS EXPECTED TO CAUSE RAPID
RISES ON CREEKS...STREAMS AND LOW LYING LOCATIONS IN THE WARNED
AREAS.

DON'T DRIVE INTO A<REAS WHERE WATER COVERS THE ROAD!

What forecasters said that day

The local office's own words before this flash flood 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 flash flood warning went out at Jun 20, 9:50 PM CDT, 3 hours 12 minutes earlier.

Area forecast discussion, Jun 20, 9:50 PM CDT, 3 hours 12 minutes before

FPUS3 KTUL 210253
AFDTUL

EASTERN OKLAHOMA/NORTHWEST ARKANSAS FORECAST DISCUSSION
NATIONAL WEATHER SERVICE TULSA OK
950 PM CDT SAT JUN 20 1998

ZONES HAVE BEEN UPDATED TO ADD CHANCE POPS FOR MOST ZONES AND TO
TWEAK WINDS AND TEMPS.  COLD FRONT HAS FIRED UP OVER SE KANSAS AND
THESE STORMS IF THEY SURVIVE WILL EVENTUALLY MOVE SOUTHEASTWARD OVER
MUCH OF NE OK AND NW AR BY LATE TONIGHT.  THE STORMS WILL LIKELY
DEVELOP INTO A COMPLEX WHICH WOULD BRING A DECENT CHANCE OF SEVERE
WEATHER TO THE AREA IN THE FORM PRIMARILY OF DAMAGING STRAIGHT-LINE
WINDS.  THE FRONT AND POSSIBLE PRECIP WILL PLAY HAVOC WITH LOW TEMPS.

...19...

.TUL...
OK...HEAT ADVISORY FOR TONIGHT THROUGH SUNDAY NIGHT FOR ZONES
OKZ049...OKZ053>056...OKZ059>061...OKZ064>067...OKZ070>077.

AR...HEAT ADVISORY FOR TONIGHT THROUGH SUNDAY NIGHT FOR ZONES
ARZ019>020...ARZ029.

In the hours before

Local storm report, Jun 20, 9:57 PM CDT, 3 hours 5 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE TULSA OK
957 PM CDT SAT JUN 20 1998

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

0855 PM    JENNINGS                  OK   NON TSTM WINDS
06/20/98   PAWNEE                         A DRY MICROBURST OCCURRED
                                          FROM THE REMNANT ANVIL OF
                                          A DISSIPATED THUNDERSTORM.
                                          SEVERAL LARGE TREE LIMBS
                                          WERE BLOWN DOWN.

Local storm report, Jun 20, 10:59 PM CDT, 2 hours 3 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE TULSA OK
1059 PM CDT SAT JUN 20 1998

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

1035 PM    BIXBY                     OK   NON TSTM WINDS
06/20/98   TULSA                          A MEASURED WIND GUST TO 61
                                          MPH OCCURRED IN BIXBY.
                                          THIS WIND WAS A DRY
                                          MICROBURST AND RESULTED IN
                                          A 10 DEGREE TEMPERATURE
                                          JUMP TO 95 DEGREES

Special weather statement, Jun 20, 11:21 PM CDT, 1 hour 41 minutes before

OKZ054-059-060-064-066-067-070-210445-

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE TULSA OK
1121 PM CDT SAT JUN 20 1998

A HIGH WIND WARNING REMAINS IN EFFECT UNTIL 1215 AM FOR OSAGE...
PAWNEE...CREEK AND TULSA COUNTIES AND UNTIL 100 AM FOR OKMULGEE...
MUSKOGEE AND WAGONER COUNTIES.

HIGH LEVEL MOISTURE...ASSOCIATED WITH THE REMNANTS OF EARLIER
THUNDERSTORMS...IS CONTRIBUTING TO CONDITIONS FAVORABLE FOR HEAT
BURSTS.  THESE HEAT BURSTS ARE OCCURRING RANDOMLY ACROSS THE
WARNING AREA AND AFFECTING SMALL AREAS...BUT WHEN THEY OCCUR WINDS
GUST TO AROUND 60 MPH AND THE TEMPERATURE JUMPS WELL INTO THE 90S
AND REACHES NEAR 100 DEGREES AT TIMES.

BETWEEN 1020 AND 1040 PM A HEAT BURST OCCURRED IN SOUTH TULSA COUNTY
WITH WINDS TO 60 MPH REPORTED IN BIXBY...POWER LINES REPORTED DOWN
AT 91ST AND GARNETT IN SOUTHEAST TULSA AND TEMPEATURES NEAR 100
DEGREES REPORTED AT A NUMBER OF SPOTS IN SOUTH TULSA.

CONDITIONS WILL REMAIN FAVORABLE FOR HEAT BURSTS IN THE WARNING
AREAS.  THESE WINDS WILL STRIKE SUDDENLY AND WITHOUT RAIN OR
LIGHTNING.  DAMAGE TO TREES AND POWER LINES MAY OCCUR.

THE GREATEST RISK FOR ADDITIONAL HEAR BURSTS APPEARS TO BE FROM
AROUND BROKEN ARROW TO NEAR COWETA AND HASKELL.

STAY TUNED TO THIS STATION FOR FURTHER INFORMATION FROM THE NATIONAL
WEATHER SERVICE.

The office that day

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

Issued	Product	Office	Counties	Lasted
Jun 20, 9:28 PM CDT	Severe Thunderstorm Warning	TSA	Okfuskee, Okmulgee	62 min
Jun 21, 12:24 AM CDT	Severe Thunderstorm Warning	TSA	Osage	66 min
Jun 21, 1:23 AM CDT	Severe Thunderstorm Warning	TSA	Osage, Pawnee	52 min
Jun 21, 1:46 AM CDT	Severe Thunderstorm Warning	TSA	Creek, Tulsa	59 min
Jun 21, 2:09 AM CDT	Severe Thunderstorm Warning	TSA	Osage, Pawnee	36 min
Jun 21, 2:17 AM CDT	Severe Thunderstorm Warning	TSA	Creek, Okmulgee	43 min
Jun 21, 2:23 AM CDT	Severe Thunderstorm Warning	TSA	Creek, Okmulgee	37 min
Jun 21, 2:30 AM CDT	Severe Thunderstorm Warning	TSA	Muskogee, Wagoner	60 min
Jun 21, 2:30 AM CDT	Severe Thunderstorm Warning	TSA	Rogers, Tulsa	60 min
Jun 21, 2:30 AM CDT	Severe Thunderstorm Warning	TSA	Okfuskee	60 min
Jun 21, 2:53 AM CDT	Severe Thunderstorm Warning	TSA	Creek, Okmulgee	37 min
Jun 21, 3:02 AM CDT	Severe Thunderstorm Warning	TSA	Mayes	58 min
Jun 21, 3:15 AM CDT	Severe Thunderstorm Warning	TSA	Cherokee, McIntosh, Muskogee	60 min
Jun 21, 3:26 AM CDT	Severe Thunderstorm Warning	TSA	Wagoner	34 min
Jun 21, 3:50 AM CDT	Severe Thunderstorm Warning	TSA	Adair, Delaware	40 min
Jun 21, 4:10 AM CDT	Severe Thunderstorm Warning	TSA	Cherokee	50 min
Jun 21, 4:20 AM CDT	Severe Thunderstorm Warning	TSA	Adair, Delaware	40 min

Nearby

Flash Flood Warnings in Oklahoma, 1998 Every flash flood 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; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.