Alert archive / Oklahoma / Severe Thunderstorm Warnings in 1998

Severe Thunderstorm Warning 388, NWS Tulsa, OK

July 12, 1998Rogers County, Oklahoma

NWS Tulsa, OK issued this severe thunderstorm warning at Jul 12, 1998, 1:48 AM CDT for Rogers County, Oklahoma. It was in force for 42 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: Jul 12, 1998, 1:48 AM CDT (06:48 UTC)
Expired: Jul 12, 1998, 2:30 AM CDT
In force: 42 min
Issued by: NWS Tulsa, OK
Area: Whole counties

County Rogers County, OK

What was reported inside it

Time	Report	Where	Remark
Jul 12, 2:10 AM CDT	Hail 0.75	Inola, OK
Jul 12, 2:10 AM CDT	Thunderstorm Wind 52	Inola, 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

Springfield, MO (KSGF), launched 00:00Z, 6.8 hours before the alert went out and 171 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: 548 J/kg
Mixed-layer CIN: -10 J/kg
Mixed-layer LCL: 1035 m above ground
0-6 km bulk shear: 13 kt
0-1 km storm-relative helicity: 32 m²/s²
0-3 km storm-relative helicity: 34 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.

313 
WUUS54 KTSA 120649 RRA
SVRTUL
OKC131-120730-

BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE TULSA OK
148 AM CDT SUN JUL 12 1998

THE NATIONAL WEATHER SERVICE IN TULSA HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...

  SOUTHEASTERN ROGERS COUNTY IN NORTHEASTERN OKLAHOMA

* UNTIL 230 AM CDT

* AT 147 AM...RADAR DETECTED A SEVERE THUNDERSTORM 6 MILES NORTHWEST
  OF INOLA...MOVING SOUTHEAST AT 30 MPH.

* SOME LOCATIONS AFFECTED INCLUDE...
  INOLA

  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.

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 Jul 11, 9:50 PM CDT, 3 hours 58 minutes earlier.

Area forecast discussion, Jul 11, 9:50 PM CDT, 3 hours 58 minutes before

EASTERN OKLAHOMA/NORTHWEST ARKANSAS FORECAST DISCUSSION
NATIONAL WEATHER SERVICE TULSA OK
950 PM CDT SAT JUL 11 1998

AS HAPPENED THE PAST FEW EVENINGS A FEW STORMS STRENGTHENED RIGHT
AROUND 8 PM AND THEN WEAKENED AGAIN AFTER 9 PM. THERE IS STILL A
CLUSTER OF STRONG STORMS IN WEST CENTRAL ARKANSAS AND PARTS OF
SOUTHEAST OKLAHOMA SLOWLY MOVING OFF TO THE EAST. FURTHER NORTH
SCATTERED SHOWERS AND THUNDERSTORMS CONTINUE TO DEVELOP.

SHORT WAVE LOOKS TO BE SLOWLY TRANSLATING EAST INTO FORECAST AREA AND
A QUICK LOOK AT THE LATEST MODELS SHOW THAT IT IS STILL EXPECTED TO
CONTINUE THIS SLOW TREK. SUSPECT THAT SHOWERS AND THUNDERSTORMS WILL
KEEP DEVELOPING AND MOVING OFF TO THE EAST/SOUTHEAST OVERNIGHT AHEAD
OF THE SHORT WAVE IN THE AXIS OF DEEPER MOISTURE. THUS WILL CONTINUE
WITH LIKELY PROBABILITY OF PRECIPITATION IN THE NORTHEASTERN ZONES.
LOOKS LIKE ONLY A LOW CHANCE FURTHER TO THE WEST ACROSS PARTS OF
EASTERN OKLAHOMA. WILL DROP THE MENTION OF HEAVY RAIN IN THE ZONES
SINCE AN ORGANIZED AREA OF HEAVY RAINFALL DOES NOT APPEAR TO BE IN
THE OFFERING TONIGHT.

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

In the hours before

Local storm report, Jul 11, 9:24 PM CDT, 4 hours 24 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE TULSA OK
924 PM CDT SAT JUL 11 1998

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

0844 PM    2W SUMMERFIELD            OK   1 INCH HAIL
07/11/98   LE FLORE

The office that day

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

Issued	Product	Office	Counties	Lasted
Jul 11, 8:31 PM CDT	Severe Thunderstorm Warning	TSA	LeFlore	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.