Alert archive / Oklahoma / Tornado Warnings in 1999

Tornado Warning 39, NWS Tulsa, OK

May 4, 1999Osage County, Pawnee County, Oklahoma

NWS Tulsa, OK issued this tornado warning at May 4, 1999, 1:01 AM CDT for Osage County, Pawnee County, Oklahoma. It was in force for 44 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 4, 1999, 1:01 AM CDT (06:01 UTC)
Expired
May 4, 1999, 1:45 AM CDT
In force
44 min
Issued by
NWS Tulsa, OK
Area
Whole counties; the outline is the Mesonet’s reconstruction

Counties Osage County, OK, Pawnee County, OK

What was reported inside it

TimeReportWhereRemark
May 4, 1:32 AM CDTHail 0.75Hominy, 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 3, 10:45 PM CDTTornado WatchSPC6 hr
May 4, 12:00 AM CDTTornado WatchSPC5 hr

The nearest sounding before it

Norman, OK (KOUN), launched 00:00Z, 6.0 hours before the alert went out and 160 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, Norman, OK at 00:00Z on 1999-05-04Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 2379 joules per kilogram.LCLLFCEL10008507005003002001001 km2 km3 km6 km9 km-30°-20°-10°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Norman, OK at 00:00Z on 1999-05-04The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 257 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
2379 J/kg
Mixed-layer CIN
-65 J/kg
Mixed-layer LCL
818 m above ground
0-6 km bulk shear
46 kt
0-1 km storm-relative helicity
257 m²/s²
0-3 km storm-relative helicity
329 m²/s²
Significant tornado parameter
2.4
Supercell composite
13.3

Open this sounding in Storm Lab

The text

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

999 
WFUS54 KTSA 040606 RRA
TORTUL
OKC113-117-040645-

BULLETIN - EAS ACTIVATION REQUESTED
TORNADO WARNING
NATIONAL WEATHER SERVICE TULSA OK
101 AM CDT TUE MAY 4 1999

THE NATIONAL WEATHER SERVICE IN TULSA HAS ISSUED A

* TORNADO WARNING FOR
  OSAGE COUNTY IN NORTHEAST OKLAHOMA
  PAWNEE COUNTY IN NORTHEAST OKLAHOMA
  
* UNTIL 145 AM CDT

* AT 101 AM CDT...RADAR INDICATED A SEVERE THUNDERSTORM WITH STRONG 
ROTATION 2 MILES NORTHWEST OF MARAMEC. ANOTHER SEVERE THUNDERSTORM 
WITH STRONG ROTATION WAS LOCATED 10 MILES WEST OF FAIRFAX. THESE  
STORMS ARE MOVING NORTHEAST AT 30 MPH.

* SOME LOCATIONS NEAR THE PATH OF THIS STORM INCLUDE...  CLEVELAND...
  SKEDEE...BLACKBURN...MARAMEC...HALLETT...SKIATOOK...BARNSDALL... 
  WYNONA...AVANT...HOMINY AND   OSAGE

IN ADDITION TO THE THREAT OF A TORNADO...LARGE HAIL AND DAMAGING
STRAIGHT LINE WINDS CAN BE EXPECTED WITH THIS STORM. GO TO A SAFE
PLACE NOW

LAT...LON 3641 9678 3617 9681 3620 9632 3648 9584
          3678 9584

The office that day

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

IssuedProductOfficeCountiesLasted
May 3, 9:44 PM CDTSevere Thunderstorm WarningTSACreek46 min
May 3, 10:29 PM CDTSevere Thunderstorm WarningTSACreek61 min
May 3, 10:37 PM CDTTornado WarningTSACreek53 min
May 3, 11:08 PM CDTTornado WarningTSAOsage, Pawnee37 min
May 3, 11:11 PM CDTSevere Thunderstorm WarningTSATulsa49 min
May 3, 11:19 PM CDTSevere Thunderstorm WarningTSAOkfuskee, Okmulgee41 min
May 3, 11:32 PM CDTTornado WarningTSACreek, Tulsa43 min
May 3, 11:40 PM CDTTornado WarningTSAOsage50 min
May 3, 11:43 PM CDTSevere Thunderstorm WarningTSANowata, Washington47 min
May 3, 11:43 PM CDTSevere Thunderstorm WarningTSAOsage47 min
May 3, 11:52 PM CDTTornado WarningTSAPawnee38 min
May 3, 11:58 PM CDTSevere Thunderstorm WarningTSACraig, Mayes, Rogers47 min
May 4, 12:10 AM CDTTornado WarningTSATulsa50 min
May 4, 12:18 AM CDTTornado WarningTSARogers57 min
May 4, 12:25 AM CDTTornado WarningTSAOsage, Pawnee35 min
May 4, 1:24 AM CDTSevere Thunderstorm WarningTSAMuskogee, Wagoner51 min
May 4, 1:42 AM CDTTornado WarningTSAOsage33 min
May 4, 1:47 AM CDTSevere Thunderstorm WarningTSACherokee43 min
May 4, 1:51 AM CDTTornado WarningTSAMuskogee39 min
May 4, 1:57 AM CDTTornado WarningTSACherokee33 min
May 4, 2:04 AM CDTTornado WarningTSAOkfuskee41 min
May 4, 2:28 AM CDTTornado WarningTSAMuskogee32 min
May 4, 2:36 AM CDTTornado WarningTSAOkfuskee, Okmulgee39 min
May 4, 2:38 AM CDTTornado WarningTSAWagoner52 min
May 4, 2:46 AM CDTTornado WarningTSADelaware44 min
May 4, 3:11 AM CDTTornado WarningTSAAdair34 min
May 4, 7:26 AM CDTTornado WarningTSAOsage34 min
May 4, 7:35 AM CDTTornado WarningTSALatimer40 min
May 4, 7:54 AM CDTTornado WarningTSALeFlore66 min
May 4, 8:37 AM CDTSevere Thunderstorm WarningTSAPawnee38 min
May 4, 9:04 AM CDTSevere Thunderstorm WarningTSAOsage56 min
May 4, 10:17 AM CDTSevere Thunderstorm WarningTSANowata43 min
May 4, 10:24 AM CDTSevere Thunderstorm WarningTSAPittsburg, Pushmataha51 min
May 4, 10:56 AM CDTTornado WarningTSALatimer, Pittsburg, Pushmataha49 min
May 4, 11:05 AM CDTSevere Thunderstorm WarningTSACreek, Tulsa60 min
May 4, 11:13 AM CDTSevere Thunderstorm WarningTSAChoctaw, Pushmataha47 min
May 4, 11:23 AM CDTFlash Flood WarningTSACreek, Rogers, Tulsa, Washington4 hr
May 4, 11:23 AM CDTFlash Flood WarningTSACraig, Nowata4 hr
May 4, 11:29 AM CDTTornado WarningTSALatimer46 min
May 4, 11:48 AM CDTSevere Thunderstorm WarningTSARogers57 min
May 4, 11:48 AM CDTTornado WarningTSAHaskell, LeFlore42 min
May 4, 11:57 AM CDTSevere Thunderstorm WarningTSACreek, Tulsa48 min
May 4, 12:21 PM CDTTornado WarningTSAHaskell, Sequoyah54 min
May 4, 12:59 PM CDTTornado WarningTSAAdair46 min
May 4, 1:09 PM CDTSevere Thunderstorm WarningTSACherokee, Muskogee51 min
May 4, 1:22 PM CDTFlash Flood WarningTSAHaskell, McIntosh, Muskogee, Pittsburg3 hr
May 4, 1:22 PM CDTFlash Flood WarningTSAAdair, Cherokee, LeFlore, Sequoyah3 hr
May 4, 1:22 PM CDTFlash Flood WarningTSAMayes, Wagoner3 hr
May 4, 1:22 PM CDTFlash Flood WarningTSALatimer3 hr
May 4, 1:22 PM CDTFlash Flood WarningTSADelaware, Ottawa3 hr
May 4, 1:44 PM CDTSevere Thunderstorm WarningTSAHaskell, Latimer46 min
May 4, 1:50 PM CDTSevere Thunderstorm WarningTSAPushmataha40 min
May 4, 1:53 PM CDTSevere Thunderstorm WarningTSAChoctaw67 min
May 4, 2:06 PM CDTSevere Thunderstorm WarningTSAAdair, Cherokee39 min
May 4, 2:29 PM CDTSevere Thunderstorm WarningTSAHaskell, Latimer46 min
May 4, 2:39 PM CDTSevere Thunderstorm WarningTSASequoyah51 min
May 4, 2:39 PM CDTSevere Thunderstorm WarningTSALeFlore51 min

Nearby

Tornado Warnings in Oklahoma, 1999Every tornado warning in 1999Tornadoes 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.