Alert archive / Arkansas / Severe Thunderstorm Warnings in 1998

Severe Thunderstorm Warning 545, NWS Little Rock, AR

August 11, 1998Marion County, Arkansas

NWS Little Rock, AR issued this severe thunderstorm warning at Aug 11, 1998, 3:36 PM CDT for Marion County, Arkansas. It was in force for 34 min. No storm report in the archive falls inside the area while it was in force.

The area

The counties it named.

The facts

Issued
Aug 11, 1998, 3:36 PM CDT (20:36 UTC)
Expired
Aug 11, 1998, 4:10 PM CDT
In force
34 min
Issued by
NWS Little Rock, AR
Area
Whole counties

County Marion County, AR

The radar

The Springfield radar (KSGF), 125 km from the middle of the area, began a volume at 20:35 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.

The nearest sounding before it

Little Rock, AR (KLZK), launched 12:00Z, 8.6 hours before the alert went out and 295 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, Little Rock, AR at 12:00Z on 1998-08-11Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 267 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, Little Rock, AR at 12:00Z on 1998-08-11The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity -24 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
267 J/kg
Mixed-layer CIN
-153 J/kg
Mixed-layer LCL
1851 m above ground
0-6 km bulk shear
10 kt
0-1 km storm-relative helicity
-24 m²/s²
0-3 km storm-relative helicity
79 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.

The office that day

Everything else NWS Little Rock, AR issued on the same UTC day.

IssuedProductOfficeCountiesLasted
Aug 10, 10:11 PM CDTSevere Thunderstorm WarningLZKFulton, Sharp49 min
Aug 11, 4:37 AM CDTSevere Thunderstorm WarningLZKClark33 min
Aug 11, 4:57 AM CDTFlash Flood WarningLZKClark, Pike3 hr
Aug 11, 1:13 PM CDTSevere Thunderstorm WarningLZKFulton47 min
Aug 11, 4:56 PM CDTSevere Thunderstorm WarningLZKWoodruff34 min
Aug 11, 5:58 PM CDTSevere Thunderstorm WarningLZKPulaski47 min
Aug 11, 6:26 PM CDTSevere Thunderstorm WarningLZKSaline44 min
Aug 11, 6:55 PM CDTSevere Thunderstorm WarningLZKGrant50 min

Nearby

Severe Thunderstorm Warnings in Arkansas, 1998Every severe thunderstorm warning 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; radar from the NEXRAD Level II archive.