Alert archive / Louisiana / Flash Flood Watches in 2008

Flash Flood Watch 4, NWS New Orleans, LA

July 6, 2008Saint Bernard Parish, Louisiana

NWS New Orleans, LA issued this flash flood watch at Jul 6, 2008, 10:02 AM CDT for Saint Bernard Parish, Louisiana. It was in force for 4 hr.

The area

The counties it named.

The facts

Issued
Jul 6, 2008, 10:02 AM CDT (15:02 UTC)
Expired
Jul 6, 2008, 2:06 PM CDT
In force
4 hr
Issued by
NWS New Orleans, LA
Flood severity
None

County Saint Bernard Parish, LA

The nearest sounding before it

Jackson, MS (KJAN), launched 12:00Z, 3.0 hours before the alert went out and 273 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 2008-07-06Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 1549 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 2008-07-06The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 84 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
1549 J/kg
Mixed-layer CIN
-62 J/kg
Mixed-layer LCL
1033 m above ground
0-6 km bulk shear
20 kt
0-1 km storm-relative helicity
84 m²/s²
0-3 km storm-relative helicity
79 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.0

Open this sounding in Storm Lab

The office that day

Everything else NWS New Orleans, LA issued on the same UTC day.

IssuedProductOfficeCountiesLasted
Jul 6, 8:43 AM CDTSpecial Marine WarningLIX47 min
Jul 6, 6:30 PM CDTSevere Thunderstorm WarningLIXLivingston, Tangipahoa30 min
Jul 6, 6:53 PM CDTSpecial Marine WarningLIX37 min

Nearby

Flash Flood Watches in Louisiana, 2008Every flash flood watch in 2008

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.