Alert archive / Mississippi / Severe Thunderstorm Warnings in 1986

Severe Thunderstorm Warning 46, NWS Mobile, AL

July 20, 1986Harrison County, Mississippi

NWS Mobile, AL issued this severe thunderstorm warning at Jul 20, 1986, 2:45 PM CDT for Harrison County, Mississippi. It was in force for 45 min.

The area

The counties it named.

The facts

Issued
Jul 20, 1986, 2:45 PM CDT (19:45 UTC)
Expired
Jul 20, 1986, 3:30 PM CDT
In force
45 min
Issued by
NWS Mobile, AL
Area
Whole counties

County Harrison County, MS

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

Boothville, LA (KBVE), launched 12:00Z, 7.8 hours before the alert went out and 125 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, Boothville, LA at 12:00Z on 1986-07-20Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 3541 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, Boothville, LA at 12:00Z on 1986-07-20The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 21 square meters per square second.1939Sfc1 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
3541 J/kg
Mixed-layer CIN
-8 J/kg
Mixed-layer LCL
702 m above ground
0-6 km bulk shear
17 kt
0-1 km storm-relative helicity
21 m²/s²
0-3 km storm-relative helicity
37 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.

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.

In the hours before

Special weather statement, Jul 20, 1:09 PM CDT, 1 hour 36 minutes before
SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE MOBILE AL
110 PM CDT SUN JUL 20 1986

...WIDELY SCATTERED STRONG THUNDERSTORMS EXPECTED FOR SOUTHWEST
ALABAMA AND SOUTHEAST MISSISSIPPI THIS AFTERNOON...

THE MOBILE RADAR AT 100 PM SHOWED WIDELY SCATTERED THUNDERSTORMS
DEVELOPING IN A RANDOM PATTERN OVER THE SOUTHERN SECTIONS OF ALABAMA
AND MISSISSIPPI.  THE THUNDERSTORMS WERE MOVING SOUTH 5 TO 10 MPH.

THE THUNDERSTORMS WILL CONTINUE TO DEVELOP DURING THE NEXT FEW HOURS
AND SOME WILL BECOME QUITE STRONG WITH DANGEROUS AND FREQUENT LIGHTNING
..STRONG GUSTY WINDS..INTENSE RAINFALL AND POSSIBLE HAIL.

RESIDENTS OF SOUTHEAST MISSISSIPPI AND SOUTHWEST ALABAMA SHOULD WATCH
FOR THESE THUNDERSTORMS AND MOVE INDOORS UNTIL THEY PASS.   ADDITIONAL
STATEMENTS OR POSSIBLE WARNINGS MAY BE ISSUED LATER.

MEANWHILE..OUTSIDE THE SHOWERS..THE HEAT GOES ON...

Nearby

Severe Thunderstorm Warnings in Mississippi, 1986Every severe thunderstorm warning in 1986

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.