Alert archive / Arkansas / Severe Thunderstorm Watches in 2000

Severe Thunderstorm Watch 182

April 20, 200020 counties in Arkansas; 8 counties in Missouri; 6 counties in Oklahoma

The Storm Prediction Center issued this severe thunderstorm watch at Apr 20, 2000, 12:30 AM CDT for 20 counties in Arkansas; 8 counties in Missouri; 6 counties in Oklahoma. It was in force for 6 hr.

The area

The outline as issued.

The facts

Issued
Apr 20, 2000, 12:30 AM CDT (05:30 UTC)
Expired
Apr 20, 2000, 6:00 AM CDT
In force
6 hr
Issued by
the Storm Prediction Center
All 34 counties

Baxter County, AR, Benton County, AR, Boone County, AR, Carroll County, AR, Crawford County, AR, Franklin County, AR, Garland County, AR, Johnson County, AR, Logan County, AR, Madison County, AR, Marion County, AR, Montgomery County, AR, Newton County, AR, Polk County, AR, Pope County, AR, Scott County, AR, Searcy County, AR, Sebastian County, AR, Washington County, AR, Yell County, AR, Barry County, MO, Christian County, MO, Douglas County, MO, McDonald County, MO, Newton County, MO, Ozark County, MO, Stone County, MO, Taney County, MO, Adair County, OK, Cherokee County, OK, Haskell County, OK, Latimer County, OK, LeFlore County, OK, Sequoyah County, OK

The radar

The Western Arkansas radar (KSRX), 27 km from the middle of the area, began a volume at 05:32 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.

Warnings issued inside it

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

IssuedProductOfficeCountiesLasted
Apr 20, 12:40 AM CDTSevere Thunderstorm WarningTSAHaskell, Muskogee, Sequoyah65 min
Apr 20, 12:44 AM CDTSevere Thunderstorm WarningTSAAdair, Delaware46 min
Apr 20, 12:58 AM CDTSevere Thunderstorm WarningTSABenton, Washington62 min
Apr 20, 1:06 AM CDTSevere Thunderstorm WarningSGFMcDonald39 min
Apr 20, 1:20 AM CDTSevere Thunderstorm WarningSGFNewton25 min
Apr 20, 1:21 AM CDTSevere Thunderstorm WarningTSACrawford54 min
Apr 20, 1:28 AM CDTSevere Thunderstorm WarningSGFBarry, Lawrence47 min
Apr 20, 1:37 AM CDTSevere Thunderstorm WarningTSACarroll, Madison38 min
Apr 20, 1:47 AM CDTSevere Thunderstorm WarningSGFChristian, Greene43 min
Apr 20, 1:47 AM CDTSevere Thunderstorm WarningSGFStone43 min
Apr 20, 2:00 AM CDTSevere Thunderstorm WarningTSAFranklin45 min
Apr 20, 2:13 AM CDTSevere Thunderstorm WarningLZKBoone, Johnson, Newton62 min
Apr 20, 2:14 AM CDTSevere Thunderstorm WarningTSAMadison31 min
Apr 20, 2:18 AM CDTSevere Thunderstorm WarningSGFDouglas, Ozark, Taney57 min
Apr 20, 2:28 AM CDTSevere Thunderstorm WarningSGFChristian17 min
Apr 20, 2:56 AM CDTSevere Thunderstorm WarningLZKMarion49 min
Apr 20, 3:15 AM CDTSevere Thunderstorm WarningSGFHowell, Ozark45 min
Apr 20, 4:25 AM CDTSevere Thunderstorm WarningLZKBaxter, Searcy35 min

The nearest sounding before it

Springfield, MO (KSGF), launched 00:00Z, 5.5 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 2000-04-20Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 1428 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 2000-04-20The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 131 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
1428 J/kg
Mixed-layer CIN
-113 J/kg
Mixed-layer LCL
1062 m above ground
0-6 km bulk shear
54 kt
0-1 km storm-relative helicity
131 m²/s²
0-3 km storm-relative helicity
247 m²/s²
Significant tornado parameter
1.2
Supercell composite
12.7

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 20, 3:15 AM CDTSevere Thunderstorm WatchSPCBaxter, Clay, Cleburne, Conway, Craighead, Crittenden and 25 more5 hr
Apr 19, 8:15 PM CDTTornado WatchSPCAdair, Andrew, Barton, Bates, Buchanan, Caldwell and 27 more6 hr
Apr 19, 10:00 PM CDTTornado WatchSPCAudrain, Benton, Boone, Callaway, Camden, Cedar and 35 more6 hr
Apr 20, 4:15 AM CDTSevere Thunderstorm WatchSPCFranklin, Gasconade, Jefferson, Lincoln, Maries, Montgomery and 7 more6 hr
Apr 19, 10:15 PM CDTTornado WatchSPCAtoka, Carter, Cherokee, Cleveland, Coal, Cotton and 34 more6 hr

Nearby

Severe Thunderstorm Watches in Arkansas, 2000Severe Thunderstorm Watches in Missouri, 2000Severe Thunderstorm Watches in Oklahoma, 2000Every severe thunderstorm watch in 2000

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; radar from the NEXRAD Level II archive.