Alert archive / Alabama / Severe Thunderstorm Warnings in 1996

Severe Thunderstorm Warning 139, NWS Mobile, AL

September 16, 1996Wilcox County, Alabama

NWS Mobile, AL issued this severe thunderstorm warning at Sep 16, 1996, 6:45 PM CDT for Wilcox County, Alabama. 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
Sep 16, 1996, 6:45 PM CDT (23:45 UTC)
Expired
Sep 16, 1996, 7:30 PM CDT
In force
45 min
Issued by
NWS Mobile, AL
Area
Whole counties

County Wilcox County, AL

The radar

The Birmingham radar (KBMX), 141 km from the middle of the area, began a volume at 23:47 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

Birmingham, AL (KBMX), launched 12:00Z, 11.8 hours before the alert went out and 141 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, Birmingham, AL at 12:00Z on 1996-09-16Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 776 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, Birmingham, AL at 12:00Z on 1996-09-16The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 278 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
776 J/kg
Mixed-layer CIN
-5 J/kg
Mixed-layer LCL
573 m above ground
0-6 km bulk shear
40 kt
0-1 km storm-relative helicity
278 m²/s²
0-3 km storm-relative helicity
319 m²/s²
Significant tornado parameter
1.0
Supercell composite
6.1

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.

What forecasters said that day

The local office's own words before this severe thunderstorm warning went out, as it sent them, from the Iowa Environmental Mesonet's archive of National Weather Service text.

NWS Mobile, AL wrote its last area forecast discussion before this severe thunderstorm warning went out at Sep 16, 2:32 PM CDT, 4 hours 13 minutes earlier.

Area forecast discussion, Sep 16, 2:32 PM CDT, 4 hours 13 minutes before
AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE MOBILE AL
230 PM CDT MON SEP 16 1996

50H TROF MOVE EAST OF FA THIS EVENING WITH FLOW BECMG ZONAL AS OMEGA
PTRN SETS UP IN MID SECTION OF COUNTRY. DRYING BEGINS TONIGHT XCPT
NEAR THE SFC. WILL PRBLY HAVE TO HANG ON TO DECENT POPS INTO THIS
EVENING ALTHOUGH WUD THNK THAT BKN LINE OF STMS FROM CBM TO LFT WILL
DIMINISH WITH LOSS OF HEATING. FCST AREA SOUNDINGS SHOW ATMOS DRYING
OUT IN THE MID LEVELS BUT REMAINING VERY MOIST NEAR THE SFC. SHUD BE
GOOD CHC FOR FOG TONIGHT WITH ABOVE SETUP AND VERY MOIST AIR MASS IN
THE LOWEST LAYERS...ESPECIALLY AS WNDS DROP OFF BY MIDNIGHT.
(1) 74/89/70/89 4212 (2) 75/89/72/89 4212
11

The office that day

Everything else NWS Mobile, AL issued on the same UTC day.

IssuedProductOfficeCountiesLasted
Sep 16, 4:15 PM CDTSevere Thunderstorm WarningMOBChoctaw45 min

Nearby

Severe Thunderstorm Warnings in Alabama, 1996Every severe thunderstorm warning in 1996

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.