Alert archive / Oklahoma / Severe Thunderstorm Warnings in 1997

Severe Thunderstorm Warning 62, NWS Tulsa, OK

March 29, 1997Okmulgee County, Oklahoma

NWS Tulsa, OK issued this severe thunderstorm warning at Mar 29, 1997, 9:30 PM CST for Okmulgee County, Oklahoma. It was in force for 45 min. 4 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: Mar 29, 1997, 9:30 PM CST (03:30 UTC)
Expired: Mar 29, 1997, 10:15 PM CST
In force: 45 min
Issued by: NWS Tulsa, OK
Area: Whole counties

County Okmulgee County, OK

The radar

The Tulsa radar (KINX), 69 km from the middle of the area, began a volume at 03:34 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.

What was reported inside it

Time	Report	Where
Mar 29, 9:46 PM CST	Hail 0.88	Okmulgee, OK
Mar 29, 10:07 PM CST	Hail 0.75	Okmulgee, OK
Mar 29, 10:10 PM CST	Thunderstorm Wind	Henryetta, OK
Mar 29, 10:12 PM CST	Thunderstorm Wind	Dewar, 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, 3.5 hours before the alert went out and 138 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: 132 J/kg
Mixed-layer CIN: -180 J/kg
Mixed-layer LCL: 2545 m above ground
0-6 km bulk shear: 41 kt
0-1 km storm-relative helicity: 91 m²/s²
0-3 km storm-relative helicity: 291 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.

000 
TTAA00 KTUL 300332 RRA
SVRTUL
OKC111-300415-
 
BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE TULSA OK
930 PM CST SAT MAR 29 1997
 
THE NATIONAL WEATHER SERVICE IN TULSA HAS ISSUED A
SEVERE THUNDERSTORM WARNING EFFECTIVE UNTIL 1015 PM CST
FOR PEOPLE IN THE FOLLOWING LOCATION...
 
IN NORTHEAST OKLAHOMA
 
   ...OKMULGEE COUNTY
 
AT 9:30 PM RADAR INDICATED A SEVERE THUNDERSTORM 10 MILES WEST OF
OKMULGEE MOVING EAST AT 40 MPH. THIS STORM HAS PRODUCED QUARTER SIZED
HAIL AND WINDS UP TO 70 MPH. BEGGS...NATURA...AND OKMULGEE ARE IN THE
PATH OF THIS STORM.
 
 
 
 
&

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 Mar 29, 9:00 PM CST, 30 minutes earlier.

Area forecast discussion, Mar 29, 9:00 PM CST, 30 minutes before

FPUS3 KTUL 300257 COR
AFDTUL

EASTERN OKLAHOMA/NORTHWEST ARKANSAS FORECAST DISCUSSION
NATIONAL WEATHER SERVICE TULSA OK
900 PM CST SAT MAR 29 1997

DID A QUICK UPDATED TO SIMPLIFY SKY CONDITION...ADJUST POPS A BIT
AND ADD THE MENTION OF THUNDER TO PLACES THAT DID NOT HAVE IT
ALREADY.

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

ABBAS

The office that day

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

Issued	Product	Office	Counties	Lasted
Mar 29, 8:50 PM CST	Severe Thunderstorm Warning	TSA	Creek	55 min
Mar 29, 9:26 PM CST	Severe Thunderstorm Warning	TSA	Okfuskee	49 min
Mar 29, 9:49 PM CST	Severe Thunderstorm Warning	TSA	McIntosh, Muskogee	56 min
Mar 29, 10:12 PM CST	Severe Thunderstorm Warning	TSA	Okfuskee	33 min
Mar 29, 10:42 PM CST	Severe Thunderstorm Warning	TSA	McIntosh, Pittsburg	63 min
Mar 29, 11:10 PM CST	Severe Thunderstorm Warning	TSA	Haskell, Sequoyah	65 min
Mar 29, 11:10 PM CST	Severe Thunderstorm Warning	TSA	Adair	65 min
Mar 29, 11:20 PM CST	Severe Thunderstorm Warning	TSA	Latimer, LeFlore	55 min
Mar 30, 12:09 AM CST	Severe Thunderstorm Warning	TSA	LeFlore	36 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; verification from NCEI's Storm Data; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.