Alert archive / Oklahoma / Severe Thunderstorm Warnings in 1999

Severe Thunderstorm Warning 310, NWS Tulsa, OK

May 22, 1999Sequoyah County, Oklahoma; Crawford County, Arkansas

NWS Tulsa, OK issued this severe thunderstorm warning at May 22, 1999, 7:40 PM CDT for Sequoyah County, Oklahoma; Crawford County, Arkansas. It was in force for 50 min. 1 report came from inside the area while it was in force.

The area

The outline the Iowa Environmental Mesonet reconstructed for it; the warning itself named whole counties, with what was reported inside it.

The facts

Issued
May 22, 1999, 7:40 PM CDT (00:40 UTC)
Expired
May 22, 1999, 8:30 PM CDT
In force
50 min
Issued by
NWS Tulsa, OK
Area
Whole counties; the outline is the Mesonet’s reconstruction

Counties Crawford County, AR, Sequoyah County, OK

What was reported inside it

TimeReportWhereRemark
May 22, 7:53 PM CDTThunderstorm Wind 52Sallisaw, 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 watch it was issued in

The SPC watch in force over the same counties when this warning went out.

IssuedProductOfficeLasted
May 22, 7:30 PM CDTSevere Thunderstorm WatchSPC6 hr

The nearest sounding before it

Springfield, MO (KSGF), launched 00:00Z, 0.7 hours before the alert went out and 161 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, Springfield, MO at 00:00Z on 1999-05-23Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 189 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, Springfield, MO at 00:00Z on 1999-05-23The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 30 square meters per square second.19395878Sfc1 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
189 J/kg
Mixed-layer CIN
-135 J/kg
Mixed-layer LCL
1465 m above ground
0-6 km bulk shear
28 kt
0-1 km storm-relative helicity
30 m²/s²
0-3 km storm-relative helicity
83 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.8

Open this sounding in Storm Lab

The text

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

999 
WUUS54 KTSA 230042 RRA
SVRTUL
ARC033-OKC135-230130-

BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE TULSA OK
740 PM CDT SAT MAY 22 1999

THE NATIONAL WEATHER SERVICE IN TULSA HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR
  SEQUOYAH COUNTY IN EAST CENTRAL OKLAHOMA
  CRAWFORD COUNTY IN NORTHWEST ARKANSAS

* UNTIL 830 PM CDT

* AT 740 PM CDT SEVERE THUNDERSTORMS CAPABLE OF PRODUCING WINDS UP TO
  70 MPH WERE LOCATED ALONG A LINE EXTENDING FROM 5 MILES WEST OF
  ODELL TO BRUSHY TO 4 MILES WEST OF BOX...  MOVING SOUTHEAST AT 45 MPH.

* SOME LOCATIONS AFFECTED INCLUDE...  LEE CREEK...RUDY...FIGURE
  FIVE...CHESTER...NATURAL DAM...CEDARVILLE...MOUNTAINBURG...SHORT...
  BRUSHY...VIAN...ROLAND...MULDROW...GANS AND SALLISAW

PEOPLE IN THE PATH OF THIS LINE OF STORMS SHOULD MOVE TO A SAFE 
PLACE NOW.

LAT...LON 3575 9445 3555 9483 3561 9513 3534 9479
          3547 9424 3568 9403

The office that day

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

IssuedProductOfficeCountiesLasted
May 22, 7:13 PM CDTSevere Thunderstorm WarningTSAOkmulgee47 min
May 22, 7:21 PM CDTSevere Thunderstorm WarningTSAOkfuskee39 min
May 22, 7:36 PM CDTSevere Thunderstorm WarningTSAMuskogee39 min
May 22, 7:49 PM CDTSevere Thunderstorm WarningTSALeFlore41 min
May 22, 7:56 PM CDTSevere Thunderstorm WarningTSAOkfuskee, Okmulgee49 min
May 22, 8:46 PM CDTSevere Thunderstorm WarningTSALeFlore44 min
May 22, 9:23 PM CDTSevere Thunderstorm WarningTSALeFlore52 min
May 23, 1:45 AM CDTSevere Thunderstorm WarningTSAOsage, Pawnee45 min
May 23, 1:45 AM CDTSevere Thunderstorm WarningTSANowata, Rogers, Washington45 min
May 23, 1:45 AM CDTSevere Thunderstorm WarningTSACraig45 min
May 23, 1:58 AM CDTSevere Thunderstorm WarningTSAOttawa47 min
May 23, 2:30 AM CDTSevere Thunderstorm WarningTSADelaware, Mayes, Ottawa60 min
May 23, 2:30 AM CDTSevere Thunderstorm WarningTSACreek, Osage, Pawnee, Tulsa60 min
May 23, 2:30 AM CDTSevere Thunderstorm WarningTSARogers, Wagoner60 min
May 23, 3:35 AM CDTSevere Thunderstorm WarningTSACreek, Okfuskee, Okmulgee55 min
May 23, 3:35 AM CDTSevere Thunderstorm WarningTSAMuskogee, Tulsa, Wagoner55 min
May 23, 3:58 AM CDTFlash Flood WarningTSAMuskogee, Okmulgee, Wagoner2 hr
May 23, 3:58 AM CDTFlash Flood WarningTSACherokee2 hr
May 23, 4:17 AM CDTSevere Thunderstorm WarningTSAMcIntosh43 min
May 22, 7:29 PM CDTSevere Thunderstorm WarningTSASebastian46 min
May 23, 3:05 AM CDTSevere Thunderstorm WarningTSABenton, Carroll, Madison40 min
May 23, 3:05 AM CDTSevere Thunderstorm WarningTSAWashington40 min

Nearby

Severe Thunderstorm Warnings in Oklahoma, 1999Severe Thunderstorm Warnings in Arkansas, 1999Every severe thunderstorm warning in 1999

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.