Alert archive / Alabama / Severe Thunderstorm Warnings in 1990

Severe Thunderstorm Warning 69, NWS Mobile, AL

April 1, 1990Clarke County, Alabama

NWS Mobile, AL issued this severe thunderstorm warning at Apr 1, 1990, 4:10 PM CDT for Clarke County, Alabama. It was in force for 50 min. 1 report came from inside the area while it was in force.

The area

The counties it named, with what was reported inside it.

The facts

Issued
Apr 1, 1990, 4:10 PM CDT (21:10 UTC)
Expired
Apr 1, 1990, 5:00 PM CDT
In force
50 min
Issued by
NWS Mobile, AL
Area
Whole counties

County Clarke County, AL

The radar

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

What was reported inside it

TimeReportWhereRemark
Apr 1, 4:42 PM CDTThunderstorm Wind 0Clarke, AL

NCEI Storm Data entries that began inside the alert's area while it was in force. Before 2003 the local storm report archive is thin, so this is the record of what happened rather than what was phoned in. Storm Data before 1996 records only tornadoes, thunderstorm wind and hail.

The nearest sounding before it

Centreville/Bibb, AL (KCKL), launched 12:00Z, 9.2 hours before the alert went out and 148 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, Centreville/Bibb, AL at 12:00Z on 1990-04-01Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 667 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, Centreville/Bibb, AL at 12:00Z on 1990-04-01The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 25 square meters per square second.19395878Sfc1 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
667 J/kg
Mixed-layer CIN
-72 J/kg
Mixed-layer LCL
840 m above ground
0-6 km bulk shear
34 kt
0-1 km storm-relative helicity
25 m²/s²
0-3 km storm-relative helicity
20 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.4

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 Mobile, AL issued on the same UTC day.

IssuedProductOfficeCountiesLasted
Apr 1, 4:18 PM CDTSevere Thunderstorm WarningMOBDallas, Wilcox57 min
Apr 1, 4:21 PM CDTSevere Thunderstorm WarningMOBCoosa, Tallapoosa69 min
Apr 1, 4:54 PM CDTSevere Thunderstorm WarningMOBAutauga, Lowndes66 min
Apr 1, 4:54 PM CDTSevere Thunderstorm WarningMOBMonroe66 min
Apr 1, 5:21 PM CDTSevere Thunderstorm WarningMOBElmore, Montgomery2 hr
Apr 1, 5:31 PM CDTSevere Thunderstorm WarningMOBCrenshaw59 min
Apr 1, 5:32 PM CDTSevere Thunderstorm WarningMOBConecuh, Escambia43 min
Apr 1, 5:52 PM CDTSevere Thunderstorm WarningMOBButler, Covington68 min
Apr 1, 6:03 PM CDTSevere Thunderstorm WarningMOBBullock, Pike57 min
Apr 1, 6:25 PM CDTSevere Thunderstorm WarningMOBCoffee65 min
Apr 1, 6:25 PM CDTSevere Thunderstorm WarningMOBMacon65 min
Apr 1, 6:41 PM CDTSevere Thunderstorm WarningMOBBarbour, Dale64 min

Nearby

Severe Thunderstorm Warnings in Alabama, 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; verification from NCEI's Storm Data; the sounding from the Mesonet's radiosonde archive.