Alert archive / Mississippi / Severe Thunderstorm Warnings in 1989

Severe Thunderstorm Warning 90, NWS Jackson, MS

May 5, 1989Amite County, Pike County, Mississippi

NWS Jackson, MS issued this severe thunderstorm warning at May 5, 1989, 5:13 AM CDT for Amite County, Pike County, Mississippi. It was in force for 32 min.

The area

The counties it named.

The facts

Issued
May 5, 1989, 5:13 AM CDT (10:13 UTC)
Expired
May 5, 1989, 5:45 AM CDT
In force
32 min
Issued by
NWS Jackson, MS
Area
Whole counties

Counties Amite County, MS, Pike 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

Slidell Radar S, LA (KSIL), launched 00:00Z, 10.2 hours before the alert went out and 134 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, Slidell Radar S, LA at 00:00Z on 1989-05-05Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 29 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, Slidell Radar S, LA at 00:00Z on 1989-05-05The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity -78 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
29 J/kg
Mixed-layer CIN
-221 J/kg
Mixed-layer LCL
1010 m above ground
0-6 km bulk shear
41 kt
0-1 km storm-relative helicity
-78 m²/s²
0-3 km storm-relative helicity
146 m²/s²
Significant tornado parameter
0.0
Supercell composite
-0.1

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.

In the hours before

Special weather statement, May 5, 4:36 AM CDT, 37 minutes before
SPECIAL WEATHER STATEMENT AND RADAR SUMMARY
NATIONAL WEATHER SERVICE JACKSON MS
426 AM CDT FRI MAY 5 1989

...TORNADO WATCH 181 IS IN EFFECT UNTIL 10 AM CDT...

NUMEROUS THUNDERSTORMS WITH VERY HEAVY RAINFALL CONTINUED TO SPREAD
OVER MOST OF MISSISSIPPI EXCEPT FOR THE SOUTHEAST PORTION OF THE STATE.

THE HEAVIER RAINFALL WAS INDICATED BETWEEN VICKSBURG AND HOLLY BLUFF
IN MISSISSIPPI AND BETWEEN DELHI AND DARNELL IN NORTHEAST LOUISIUANA.

MOVEMENT WAS NORTHEAST AT 25 MILES AN HOUR.

The office that day

Everything else NWS Jackson, MS issued on the same UTC day.

IssuedProductOfficeCountiesLasted
May 5, 4:45 AM CDTTornado WarningJANYazoo30 min
May 5, 5:07 AM CDTTornado WarningJANHinds, Madison28 min

Nearby

Severe Thunderstorm Warnings in Mississippi, 1989Every severe thunderstorm warning in 1989

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.