Alert archive / Arkansas / Severe Thunderstorm Watches in 2004

Severe Thunderstorm Watch 59

April 9, 200416 counties in Arkansas; 6 counties in Oklahoma

The Storm Prediction Center issued this severe thunderstorm watch at Apr 9, 2004, 4:00 PM CDT for 16 counties in Arkansas; 6 counties in Oklahoma. It was in force for 5 hr.

The area

The outline as issued.

The facts

Issued
Apr 9, 2004, 4:00 PM CDT (21:00 UTC)
Expired
Apr 9, 2004, 9:00 PM CDT
In force
5 hr
Issued by
the Storm Prediction Center
All 22 counties

Conway County, AR, Crawford County, AR, Franklin County, AR, Garland County, AR, Hot Spring County, AR, Johnson County, AR, Logan County, AR, Montgomery County, AR, Perry County, AR, Polk County, AR, Pope County, AR, Saline County, AR, Scott County, AR, Sebastian County, AR, Van Buren County, AR, Yell County, AR, Haskell County, OK, Latimer County, OK, LeFlore County, OK, Muskogee County, OK, Pushmataha County, OK, Sequoyah County, OK

Warnings issued inside it

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

IssuedProductOfficeCountiesLasted
Apr 9, 5:06 PM CDTSevere Thunderstorm WarningTSALatimer39 min
Apr 9, 5:50 PM CDTSevere Thunderstorm WarningTSALeFlore55 min
Apr 9, 5:53 PM CDTTornado WarningTSALatimer67 min
Apr 9, 6:10 PM CDTSevere Thunderstorm WarningTSAHaskell, Muskogee50 min
Apr 9, 6:38 PM CDTTornado WarningTSALeFlore, Pushmataha67 min
Apr 9, 6:41 PM CDTSevere Thunderstorm WarningLZKScott44 min
Apr 9, 7:27 PM CDTTornado WarningLZKPolk48 min
Apr 9, 7:40 PM CDTSevere Thunderstorm WarningLZKYell35 min
Apr 9, 8:16 PM CDTTornado WarningLZKPolk29 min
Apr 9, 8:30 PM CDTTornado WarningLZKMontgomery, Pike45 min
Apr 9, 8:32 PM CDTSevere Thunderstorm WarningLZKPerry, Saline58 min

Discussions around it

SPC mesoscale discussions over the same counties from four hours before the watch to its end.

The nearest sounding before it

Springfield, MO (KSGF), launched 12:00Z, 9.0 hours before the alert went out and 191 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 2004-04-09Temperature 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 2004-04-09The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 18 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
2054 m above ground
0-6 km bulk shear
37 kt
0-1 km storm-relative helicity
18 m²/s²
0-3 km storm-relative helicity
86 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.0

Open this sounding in Storm Lab

SPC that day

Everything else SPC issued on the same UTC day.

IssuedProductOfficeCountiesLasted
Apr 9, 1:00 PM CDTMesoscale DiscussionSPCBenton, Washington3 hr
Apr 9, 3:32 PM CDTMesoscale DiscussionSPCCrawford, Franklin, Logan, Montgomery, Polk, Scott and 3 more88 min
Apr 9, 1:51 PM CDTMesoscale DiscussionSPCAtoka, Beckham, Blaine, Caddo, Canadian, Cleveland and 27 more114 min
Apr 9, 2:15 PM CDTSevere Thunderstorm WatchSPCAtoka, Beckham, Blaine, Bryan, Caddo, Canadian and 27 more6 hr
Apr 9, 4:20 PM CDTMesoscale DiscussionSPCCimarron115 min

Nearby

Severe Thunderstorm Watches in Arkansas, 2004Severe Thunderstorm Watches in Oklahoma, 2004Every severe thunderstorm watch in 2004

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.