Alert archive / Arkansas / Tornado Watches in 1998

Tornado Watch 217

April 15, 199838 counties in Arkansas; 7 counties in Oklahoma

The Storm Prediction Center issued this tornado watch at Apr 15, 1998, 6:15 PM CDT for 38 counties in Arkansas; 7 counties in Oklahoma. It was in force for 6 hr.

The area

The outline as issued.

The facts

Issued
Apr 15, 1998, 6:15 PM CDT (23:15 UTC)
Expired
Apr 16, 1998, 12:00 AM CDT
In force
6 hr
Issued by
the Storm Prediction Center
All 45 counties

Baxter County, AR, Benton County, AR, Boone County, AR, Carroll County, AR, Clay County, AR, Cleburne County, AR, Conway County, AR, Crawford County, AR, Faulkner County, AR, Franklin County, AR, Fulton County, AR, Garland County, AR, Greene County, AR, Independence County, AR, Izard County, AR, Jackson County, AR, Johnson County, AR, Lawrence County, AR, Logan County, AR, Madison County, AR, Marion County, AR, Montgomery County, AR, Newton County, AR, Perry County, AR, Polk County, AR, Pope County, AR, Pulaski County, AR, Randolph County, AR, Saline County, AR, Scott County, AR, Searcy County, AR, Sebastian County, AR, Sharp County, AR, Stone County, AR, Van Buren County, AR, Washington County, AR, White County, AR, Yell County, AR, Adair County, OK, Coal County, OK, Haskell County, OK, Latimer County, OK, LeFlore County, OK, Pittsburg County, OK, Sequoyah County, OK

Warnings issued inside it

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

IssuedProductOfficeCountiesLasted
Apr 15, 6:31 PM CDTSevere Thunderstorm WarningTSABenton, Carroll59 min
Apr 15, 7:01 PM CDTSevere Thunderstorm WarningTSALatimer, LeFlore59 min
Apr 15, 7:04 PM CDTSevere Thunderstorm WarningTSASebastian56 min
Apr 15, 7:10 PM CDTSevere Thunderstorm WarningTSAFranklin65 min
Apr 15, 7:40 PM CDTSevere Thunderstorm WarningTSAPittsburg50 min
Apr 15, 7:47 PM CDTSevere Thunderstorm WarningLZKJohnson48 min
Apr 15, 8:20 PM CDTSevere Thunderstorm WarningTSALeFlore40 min
Apr 15, 8:26 PM CDTSevere Thunderstorm WarningLZKPope49 min
Apr 15, 8:40 PM CDTSevere Thunderstorm WarningTSASebastian50 min
Apr 15, 8:45 PM CDTSevere Thunderstorm WarningTSALeFlore, Pushmataha60 min
Apr 15, 8:52 PM CDTSevere Thunderstorm WarningLZKJohnson48 min
Apr 15, 9:06 PM CDTTornado WarningLZKVan Buren64 min
Apr 15, 10:04 PM CDTTornado WarningLZKCleburne, Stone46 min
Apr 15, 10:49 PM CDTTornado WarningLZKIndependence, Izard, Stone61 min
Apr 15, 11:11 PM CDTSevere Thunderstorm WarningLZKPolk64 min
Apr 15, 11:29 PM CDTSevere Thunderstorm WarningLZKPulaski31 min
Apr 15, 11:55 PM CDTSevere Thunderstorm WarningMEGRandolph50 min

The nearest sounding before it

Springfield, MO (KSGF), launched 12:00Z, 11.3 hours before the alert went out and 184 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 1998-04-15Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 557 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 12:00Z on 1998-04-15The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 280 square meters per square second.1939587897117136156Sfc1 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
557 J/kg
Mixed-layer CIN
-28 J/kg
Mixed-layer LCL
846 m above ground
0-6 km bulk shear
60 kt
0-1 km storm-relative helicity
280 m²/s²
0-3 km storm-relative helicity
315 m²/s²
Significant tornado parameter
1.1
Supercell composite
4.9

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 14, 9:15 PM CDTTornado WatchSPCAlfalfa, Garfield, Grant, Kay, Major, Noble and 4 more6 hr
Apr 14, 11:45 PM CDTTornado WatchSPCCraig, Ottawa5 hr

Nearby

Tornado Watches in Arkansas, 1998Tornado Watches in Oklahoma, 1998Every tornado watch in 1998

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.