Alert archive / Oklahoma / Tornado Warnings in 1999

Tornado Warning 107, NWS Norman, OK

May 25, 1999Tillman County, Oklahoma

NWS Norman, OK issued this tornado warning at May 25, 1999, 8:08 PM CDT for Tillman County, Oklahoma. It was in force for 52 min. 5 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
May 25, 1999, 8:08 PM CDT (01:08 UTC)
Expired
May 25, 1999, 9:00 PM CDT
In force
52 min
Issued by
NWS Norman, OK
Area
Whole counties; the outline is the Mesonet’s reconstruction

County Tillman County, OK

What was reported inside it

TimeReportWhereRemark
May 25, 8:16 PM CDTTornado F0Manitou, OK
May 25, 8:30 PM CDTThunderstorm Wind 57Tipton, OK
May 25, 8:37 PM CDTHail 1.25Frederick, OK
May 25, 8:45 PM CDTHail 0.75Frederick, OK
May 25, 8:45 PM CDTThunderstorm Wind 52Frederick, 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 25, 5:30 PM CDTSevere Thunderstorm WatchSPC6 hr

The nearest sounding before it

Fort Worth, TX (KFWD), launched 00:00Z, 1.1 hours before the alert went out and 229 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, Fort Worth, TX at 00:00Z on 1999-05-26Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 1344 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, Fort Worth, TX at 00:00Z on 1999-05-26The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity -56 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
1344 J/kg
Mixed-layer CIN
-54 J/kg
Mixed-layer LCL
1377 m above ground
0-6 km bulk shear
28 kt
0-1 km storm-relative helicity
-56 m²/s²
0-3 km storm-relative helicity
49 m²/s²
Significant tornado parameter
0.1
Supercell composite
0.6

Open this sounding in Storm Lab

The text

The text of this product is not in the archive. The NWS text archive before 2002 is incomplete.

The office that day

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

IssuedProductOfficeCountiesLasted
May 25, 7:09 PM CDTTornado WarningOUNGreer, Jackson51 min
May 25, 7:59 PM CDTTornado WarningOUNJackson31 min
May 25, 8:55 PM CDTSevere Thunderstorm WarningOUNJackson50 min
May 25, 8:57 PM CDTSevere Thunderstorm WarningOUNTillman48 min
May 25, 7:50 PM CDTSevere Thunderstorm WarningOUNKnox45 min
May 25, 7:55 PM CDTTornado WarningOUNKnox50 min
May 25, 8:37 PM CDTSevere Thunderstorm WarningOUNBaylor43 min
May 25, 9:34 PM CDTSevere Thunderstorm WarningOUNWichita46 min
May 25, 10:13 PM CDTSevere Thunderstorm WarningOUNClay, Wichita47 min
May 25, 10:56 PM CDTSevere Thunderstorm WarningOUNClay34 min
May 25, 11:55 PM CDTSevere Thunderstorm WarningOUNHardeman50 min
May 26, 12:43 AM CDTSevere Thunderstorm WarningOUNHardeman42 min
May 26, 1:26 AM CDTSevere Thunderstorm WarningOUNKnox44 min
May 26, 2:08 AM CDTSevere Thunderstorm WarningOUNKnox37 min
May 26, 2:31 AM CDTSevere Thunderstorm WarningOUNBaylor44 min
May 26, 4:05 AM CDTFlash Flood WarningOUNKnox3 hr
May 26, 4:40 AM CDTFlash Flood WarningOUNArcher3 hr

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.