Alert archive / Arkansas / Severe Thunderstorm Warnings in 1998

Severe Thunderstorm Warning 45, NWS Little Rock, AR

March 7, 1998Calhoun County, Ouachita County, Arkansas

NWS Little Rock, AR issued this severe thunderstorm warning at Mar 7, 1998, 2:15 AM CST for Calhoun County, Ouachita County, Arkansas. It was in force for 50 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
Mar 7, 1998, 2:15 AM CST (08:15 UTC)
Expired
Mar 7, 1998, 3:05 AM CST
In force
50 min
Issued by
NWS Little Rock, AR
Area
Whole counties

Counties Calhoun County, AR, Ouachita County, AR

The radar

The Little Rock radar (KLZK), 146 km from the middle of the area, began a volume at 08:15 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

Jackson, MS (KJAN), launched 00:00Z, 8.3 hours before the alert went out and 281 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, Jackson, MS at 00:00Z on 1998-03-07Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 401 joules per kilogram.LCLEL10008507005003002001001 km2 km3 km6 km9 km12 km-30°-20°-10°0°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Jackson, MS at 00:00Z on 1998-03-07The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 62 square meters per square second.1939587897117136Sfc1 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
401 J/kg
Mixed-layer CIN
-1 J/kg
Mixed-layer LCL
590 m above ground
0-6 km bulk shear
51 kt
0-1 km storm-relative helicity
62 m²/s²
0-3 km storm-relative helicity
96 m²/s²
Significant tornado parameter
0.1
Supercell composite
0.6

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
Mar 7, 2:03 AM CSTSevere Thunderstorm WarningLZKBradley47 min
Mar 7, 2:34 AM CSTSevere Thunderstorm WarningLZKCleveland, Dallas51 min
Mar 7, 8:45 AM CSTSevere Thunderstorm WarningLZKDrew60 min
Mar 7, 10:16 AM CSTSevere Thunderstorm WarningLZKCalhoun49 min
Mar 7, 11:56 AM CSTSevere Thunderstorm WarningLZKPolk49 min
Mar 7, 12:33 PM CSTSevere Thunderstorm WarningLZKScott47 min
Mar 7, 12:55 PM CSTSevere Thunderstorm WarningLZKPike50 min
Mar 7, 12:59 PM CSTSevere Thunderstorm WarningLZKClark61 min
Mar 7, 1:03 PM CSTSevere Thunderstorm WarningLZKLogan47 min
Mar 7, 2:01 PM CSTSevere Thunderstorm WarningLZKPike49 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.