Alert archive / Oklahoma / Severe Thunderstorm Warnings in 1997

Severe Thunderstorm Warning 308, NWS Tulsa, OK

August 17, 1997Nowata County, Washington County, Oklahoma

NWS Tulsa, OK issued this severe thunderstorm warning at Aug 17, 1997, 3:26 AM CDT for Nowata County, Washington County, Oklahoma. It was in force for 49 min. No storm report in the archive falls inside the area while it was in force.

The area

The counties it named.

The facts

Issued: Aug 17, 1997, 3:26 AM CDT (08:26 UTC)
Expired: Aug 17, 1997, 4:15 AM CDT
In force: 49 min
Issued by: NWS Tulsa, OK
Area: Whole counties

Counties Nowata County, OK, Washington County, OK

The nearest sounding before it

Springfield, MO (KSGF), launched 00:00Z, 8.4 hours before the alert went out and 175 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: 3841 J/kg
Mixed-layer CIN: -32 J/kg
Mixed-layer LCL: 1067 m above ground
0-6 km bulk shear: 18 kt
0-1 km storm-relative helicity: 79 m²/s²
0-3 km storm-relative helicity: 121 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.

000 
TTAA00 KTUL 170825
SVRTUL
OKC105-147-170915-
 
BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE TULSA OK
326 AM CDT SUN AUG 17 1997
 
THE NATIONAL WEATHER SERVICE IN TULSA HAS ISSUED A
SEVERE THUNDERSTORM WARNING EFFECTIVE UNTIL  415 AM CDT
FOR PEOPLE IN THE FOLLOWING LOCATIONS...
 
IN NORTHEAST OKLAHOMA
 
   ...NOWATA COUNTY...WASHINGTON COUNTY
 
AT 325 AM...NWS RADAR INDICATED A SEVERE THUNDERSTORM 2 MILES NORTHEAST
OF COPAN MOVING SOUTHEAST AT 20 MPH. WANN IS IN THE PATH OF THIS STORM.
 
HAIL TO THE SIZE OF NICKELS AND WIND GUSTS TO 60 MPH CAN BE EXPECTED
IN THE WARNED AREA.

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 17, 12:53 AM CDT, 2 hours 33 minutes earlier.

Area forecast discussion, Aug 17, 12:53 AM CDT, 2 hours 33 minutes before

EASTERN OKLAHOMA/NORTHWEST ARKANSAS FORECAST DISCUSSION
NATIONAL WEATHER SERVICE TULSA OK
1250 AM CDT SAT AUG 16 1997

LINE OF TSTMS MOVING THRU ERN KS IS XPCD TO CONT SEWD AND CROSS THE
BORDER BETWEEN 9 AND 10Z.  COUNTIES TO BE AFFECTED WILL BE FROM
WASHINGTON TO OTTAWA...ALTHO WASHINGTON MAY ONLY GET BRUSHED BY
WESTERN EDGE OF LINE.  THETA E RIDGE EXTENDS NWD THRU ERN OK WITH 10
TO 20 KTS OF SRLY FLOW INTO THE LINE.  STORM RELATIVE FLOW PROBABLY
AROUND 40 KTS.  DO NOT XPC THIS LINE TO WEAKEN UNTIL SOMETIME AFT
SUNRISE. WILL LIKELY UP THE POPS FARTHER SOUTHEAST IN THE 430AM ZONE
PACKAGE. /02

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

The office that day

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

Issued	Product	Office	Counties	Lasted
Aug 17, 3:17 AM CDT	Severe Thunderstorm Warning	TSA	Rogers, Tulsa	58 min
Aug 17, 4:06 AM CDT	Severe Thunderstorm Warning	TSA	Rogers, Wagoner	69 min
Aug 17, 5:13 AM CDT	Flash Flood Warning	TSA	Rogers	3 hr
Aug 17, 7:25 AM CDT	Severe Thunderstorm Warning	TSA	Muskogee	50 min
Aug 17, 8:12 AM CDT	Severe Thunderstorm Warning	TSA	Pittsburg	63 min

Nearby

Severe Thunderstorm Warnings in Oklahoma, 1997 Every severe thunderstorm warning in 1997

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.