Alert archive / Arkansas / Severe Thunderstorm Warnings in 1999

Severe Thunderstorm Warning 161, NWS Memphis, TN

April 26, 1999Cross County, Arkansas

NWS Memphis, TN issued this severe thunderstorm warning at Apr 26, 1999, 4:30 PM CDT for Cross County, Arkansas. It was in force for 45 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
Apr 26, 1999, 4:30 PM CDT (21:30 UTC)
Expired
Apr 26, 1999, 5:15 PM CDT
In force
45 min
Issued by
NWS Memphis, TN
Area
Whole counties

County Cross County, AR

The radar

The Memphis radar (KNQA), 82 km from the middle of the area, began a volume at 21:32 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.

The watch it was issued in

The SPC watch in force over the same counties when this warning went out.

IssuedProductOfficeLasted
Apr 26, 12:30 PM CDTSevere Thunderstorm WatchSPC6 hr

The nearest sounding before it

Springfield, MO (KSGF), launched 12:00Z, 9.5 hours before the alert went out and 325 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 1999-04-26Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 248 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 1999-04-26The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 106 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
248 J/kg
Mixed-layer CIN
-13 J/kg
Mixed-layer LCL
477 m above ground
0-6 km bulk shear
31 kt
0-1 km storm-relative helicity
106 m²/s²
0-3 km storm-relative helicity
137 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 Memphis, TN issued on the same UTC day.

IssuedProductOfficeCountiesLasted
Apr 26, 3:54 AM CDTSevere Thunderstorm WarningMEGLee31 min
Apr 26, 4:06 AM CDTTornado WarningMEGLee34 min
Apr 26, 4:16 AM CDTSevere Thunderstorm WarningMEGItawamba34 min
Apr 26, 3:59 PM CDTSevere Thunderstorm WarningMEGPhillips46 min
Apr 26, 4:30 PM CDTSevere Thunderstorm WarningMEGLee, St. Francis45 min

Nearby

Severe Thunderstorm Warnings in Arkansas, 1999Every severe thunderstorm warning in 1999

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.