Alert archive / Arkansas / Severe Thunderstorm Warnings in 1990

Severe Thunderstorm Warning 135, NWS Shreveport, LA

May 20, 1990Nevada County, Arkansas

NWS Shreveport, LA issued this severe thunderstorm warning at May 20, 1990, 1:00 AM CDT for Nevada County, Arkansas. It was in force for 2 hr.

The area

The counties it named.

The facts

Issued
May 20, 1990, 1:00 AM CDT (06:00 UTC)
Expired
May 20, 1990, 3:00 AM CDT
In force
2 hr
Issued by
NWS Shreveport, LA
Area
Whole counties

County Nevada County, AR

The radar

The WSR-88D network and its archive begin in 1991, so there is no radar volume for this alert.

The nearest sounding before it

Longview/Gregg, TX (KGGG), launched 00:00Z, 6.0 hours before the alert went out and 189 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, Longview/Gregg, TX at 00:00Z on 1990-05-20Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 1308 joules per kilogram.LCLLFCEL10008507005003002001001 km2 km3 km6 km-30°-20°-10°0°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Longview/Gregg, TX at 00:00Z on 1990-05-20The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 161 square meters per square second.193958Sfc1 km3 km6 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
1308 J/kg
Mixed-layer CIN
-12 J/kg
Mixed-layer LCL
937 m above ground
0-6 km bulk shear
33 kt
0-1 km storm-relative helicity
161 m²/s²
0-3 km storm-relative helicity
209 m²/s²
Significant tornado parameter
0.0
Supercell composite
3.2

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 Shreveport, LA issued on the same UTC day.

IssuedProductOfficeCountiesLasted
May 20, 12:15 PM CDTSevere Thunderstorm WarningSHVCaddo2 hr
May 20, 12:15 PM CDTSevere Thunderstorm WarningSHVBossier, Webster2 hr
May 20, 12:15 PM CDTSevere Thunderstorm WarningSHVDe Soto2 hr
May 20, 12:44 PM CDTSevere Thunderstorm WarningSHVBienville, Claiborne2 hr
May 20, 12:44 PM CDTSevere Thunderstorm WarningSHVRed River2 hr
May 20, 12:44 PM CDTSevere Thunderstorm WarningSHVSabine2 hr
May 20, 2:01 PM CDTSevere Thunderstorm WarningSHVJackson, Natchitoches, Winn119 min
May 20, 2:01 PM CDTSevere Thunderstorm WarningSHVLincoln, Ouachita, Union119 min
May 20, 2:01 PM CDTSevere Thunderstorm WarningSHVMorehouse119 min
May 20, 2:29 PM CDTSevere Thunderstorm WarningSHVEast Carroll, Richland, West Carroll61 min
May 20, 3:10 PM CDTSevere Thunderstorm WarningSHVFranklin, Madison, Tensas95 min
May 20, 3:10 PM CDTSevere Thunderstorm WarningSHVCaldwell95 min
May 19, 8:13 PM CDTSevere Thunderstorm WarningSHVCass62 min
May 19, 7:15 PM CDTSevere Thunderstorm WarningSHVHempstead, Pike60 min
May 19, 8:13 PM CDTSevere Thunderstorm WarningSHVHoward, Pike62 min
May 19, 9:15 PM CDTSevere Thunderstorm WarningSHVPike45 min
May 19, 10:00 PM CDTFlash Flood WarningSHVPike3 hr
May 19, 10:00 PM CDTSevere Thunderstorm WarningSHVPike3 hr
May 20, 1:00 AM CDTFlash Flood WarningSHVPike3 hr
May 20, 1:00 AM CDTSevere Thunderstorm WarningSHVPike3 hr
May 20, 2:20 AM CDTTornado WarningSHVLittle River, Sevier40 min
May 20, 4:09 AM CDTFlash Flood WarningSHVNevada, Pike3 hr

Nearby

Severe Thunderstorm Warnings in Arkansas, 1990Every severe thunderstorm warning in 1990

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.