Alert archive / Mississippi / Flash Flood Warnings in 1987

Flash Flood Warning 12, NWS Jackson, MS

August 14, 1987Marion County, Mississippi

NWS Jackson, MS issued this flash flood warning at Aug 14, 1987, 4:30 PM CDT for Marion County, Mississippi. It was in force for 2 hr.

The area

The counties it named.

The facts

Issued
Aug 14, 1987, 4:30 PM CDT (21:30 UTC)
Expired
Aug 14, 1987, 6:30 PM CDT
In force
2 hr
Issued by
NWS Jackson, MS
Area
Whole counties

County Marion 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

Jackson, MS (KJAN), launched 12:00Z, 9.5 hours before the alert went out and 124 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, Jackson, MS at 12:00Z on 1987-08-14Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 1472 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, Jackson, MS at 12:00Z on 1987-08-14The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 0 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
1472 J/kg
Mixed-layer CIN
-8 J/kg
Mixed-layer LCL
527 m above ground
0-6 km bulk shear
0 kt
0-1 km storm-relative helicity
0 m²/s²
0-3 km storm-relative helicity
0 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 flash flood 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, Aug 14, 11:37 AM CDT, 4 hours 53 minutes before
SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE JACKSON MS
1135 AM CDT FRI AUG 14 1987

AT 1130 AM...A FUNNEL CLOUD WAS REPORTED 5 MILES SOUTHWEST OF FLORA
ALONG THE HINDS-MADISON COUNTY LINE.  RADAR SHOWS NO EVIDENCE OF A
TORNADO IN THIS THUNDERSTORM...BUT PEOPLE IN NORTHERN HINDS COUNTY
SHOULD BE ON THE WATCH OUT FOR THIS STORM.  THE FUNNEL CLOUD IS EXPECTED
TO DISSIPATE WITHOUT TOUCHING DOWN.

THE FUNNEL WAS MOVING GENERALLY TO THE SOUTH AT 5 TO 10 MILES PER HOUR.

Nearby

Flash Flood Warnings in Mississippi, 1987Every flash flood warning in 1987

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.