Alert archive / Mississippi / Flash Flood Watches in 2006

Flash Flood Watch 5, NWS Jackson, MS

December 21, 2006Forrest County, Lamar County, Marion County, Mississippi

NWS Jackson, MS issued this flash flood watch at Dec 21, 2006, 4:19 PM CST for Forrest County, Lamar County, Marion County, Mississippi. It took effect at Dec 21, 2006, 6:00 PM CST. It was in force for 11 hr.

The area

The counties it named.

The facts

Issued
Dec 21, 2006, 4:19 PM CST (22:19 UTC)
In effect from
Dec 21, 2006, 6:00 PM CST
Expired
Dec 22, 2006, 5:08 AM CST
In force
11 hr
Issued by
NWS Jackson, MS
Flood severity
None

Counties Forrest County, MS, Lamar County, MS, Marion County, MS

The nearest sounding before it

Slidell Radar S, LA (KSIL), launched 12:00Z, 10.3 hours before the alert went out and 108 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 12:00Z on 2006-12-21Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 27 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 12:00Z on 2006-12-21The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 133 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
27 J/kg
Mixed-layer CIN
-50 J/kg
Mixed-layer LCL
659 m above ground
0-6 km bulk shear
38 kt
0-1 km storm-relative helicity
133 m²/s²
0-3 km storm-relative helicity
258 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.0

Open this sounding in Storm Lab

The office that day

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

IssuedProductOfficeCountiesLasted
Dec 21, 5:14 PM CSTSevere Thunderstorm WarningJANAdams17 min
Dec 21, 5:57 PM CSTSevere Thunderstorm WarningJANRichland40 min

Nearby

Flash Flood Watches in Mississippi, 2006Every flash flood watch in 2006

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.