Alert archive / Missouri / Tornado Watches in 1999

Tornado Watch 166

April 22, 19994 states

The Storm Prediction Center issued this tornado watch at Apr 22, 1999, 4:00 PM CDT for 4 states. It was in force for 5 hr.

The area

The outline as issued.

The facts

Issued
Apr 22, 1999, 4:00 PM CDT (21:00 UTC)
Expired
Apr 22, 1999, 9:00 PM CDT
In force
5 hr
Issued by
the Storm Prediction Center
All 38 counties

Benton County, AR, Crawford County, AR, Washington County, AR, Allen County, KS, Bourbon County, KS, Cherokee County, KS, Crawford County, KS, Labette County, KS, Montgomery County, KS, Neosho County, KS, Barry County, MO, Barton County, MO, Cedar County, MO, Dade County, MO, Dallas County, MO, Greene County, MO, Hickory County, MO, Jasper County, MO, Lawrence County, MO, McDonald County, MO, Newton County, MO, Polk County, MO, Stone County, MO, Vernon County, MO, Adair County, OK, Cherokee County, OK, Craig County, OK, Creek County, OK, Delaware County, OK, Mayes County, OK, Muskogee County, OK, Nowata County, OK, Okmulgee County, OK, Ottawa County, OK, Rogers County, OK, Tulsa County, OK, Wagoner County, OK, Washington County, OK

Warnings issued inside it

32 tornado, severe thunderstorm and flash flood warnings for its counties while it was in force.

IssuedProductOfficeCountiesLasted
Apr 22, 4:25 PM CDTTornado WarningTSACraig35 min
Apr 22, 4:52 PM CDTSevere Thunderstorm WarningTSANowata38 min
Apr 22, 5:01 PM CDTTornado WarningTSACraig29 min
Apr 22, 5:14 PM CDTTornado WarningTSADelaware, Ottawa46 min
Apr 22, 5:27 PM CDTTornado WarningTSACraig33 min
Apr 22, 5:28 PM CDTSevere Thunderstorm WarningTSARogers, Tulsa47 min
Apr 22, 5:37 PM CDTSevere Thunderstorm WarningTSARogers53 min
Apr 22, 5:42 PM CDTTornado WarningSGFMcDonald48 min
Apr 22, 5:55 PM CDTSevere Thunderstorm WarningTSAMayes, Rogers, Wagoner50 min
Apr 22, 6:00 PM CDTSevere Thunderstorm WarningTSACraig, Delaware45 min
Apr 22, 6:17 PM CDTSevere Thunderstorm WarningSGFNewton48 min
Apr 22, 6:30 PM CDTTornado WarningSGFMcDonald50 min
Apr 22, 6:33 PM CDTTornado WarningTSAMayes, Rogers, Wagoner42 min
Apr 22, 6:39 PM CDTFlash Flood WarningSGFMcDonald4 hr
Apr 22, 6:50 PM CDTTornado WarningSGFBarry50 min
Apr 22, 7:06 PM CDTTornado WarningTSACherokee, Wagoner54 min
Apr 22, 7:10 PM CDTSevere Thunderstorm WarningTSAMuskogee, Okmulgee35 min
Apr 22, 7:15 PM CDTSevere Thunderstorm WarningTSABenton30 min
Apr 22, 7:18 PM CDTSevere Thunderstorm WarningSGFMcDonald47 min
Apr 22, 7:33 PM CDTFlash Flood WarningSGFBarry4 hr
Apr 22, 7:36 PM CDTTornado WarningSGFBarry, McDonald49 min
Apr 22, 7:39 PM CDTSevere Thunderstorm WarningTSAMuskogee51 min
Apr 22, 7:50 PM CDTSevere Thunderstorm WarningTSAMcIntosh, Okmulgee40 min
Apr 22, 7:55 PM CDTFlash Flood WarningTSACherokee3 hr
Apr 22, 7:58 PM CDTSevere Thunderstorm WarningTSAAdair, Cherokee47 min
Apr 22, 8:08 PM CDTSevere Thunderstorm WarningTSABenton, Washington37 min
Apr 22, 8:16 PM CDTSevere Thunderstorm WarningTSAOkfuskee, Okmulgee29 min
Apr 22, 8:23 PM CDTTornado WarningTSAWashington22 min
Apr 22, 8:28 PM CDTSevere Thunderstorm WarningTSAMcIntosh, Muskogee47 min
Apr 22, 8:33 PM CDTFlash Flood WarningTSAOkfuskee, Okmulgee3 hr
Apr 22, 8:33 PM CDTFlash Flood WarningTSAMuskogee3 hr
Apr 22, 8:44 PM CDTSevere Thunderstorm WarningTSAWashington46 min

The nearest sounding before it

Springfield, MO (KSGF), launched 12:00Z, 9.0 hours before the alert went out and 122 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 12:00Z on 1999-04-22Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 0 joules per kilogram.LCL10008507005003002001001 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 12:00Z on 1999-04-22The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 139 square meters per square second.193958Sfc1 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
0 J/kg
Mixed-layer CIN
No buoyant parcel
Mixed-layer LCL
1444 m above ground
0-6 km bulk shear
40 kt
0-1 km storm-relative helicity
139 m²/s²
0-3 km storm-relative helicity
123 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.0

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.

SPC that day

Everything else SPC issued on the same UTC day.

IssuedProductOfficeCountiesLasted
Apr 22, 6:30 PM CDTSevere Thunderstorm WatchSPCAudrain, Callaway, Lincoln, Marion, Montgomery, Pike and 5 more6 hr
Apr 22, 12:00 AM CDTSevere Thunderstorm WatchSPCAdair, Alfalfa, Blaine, Cherokee, Craig, Creek and 21 more5 hr

Nearby

Tornado Watches in Missouri, 1999Tornado Watches in Oklahoma, 1999Tornado Watches in Kansas, 1999Every tornado watch 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; the sounding from the Mesonet's radiosonde archive.