Alert archive / Louisiana / Flash Flood Warnings in 2012

Flash Flood Warning 28, NWS New Orleans, LA

June 10, 2012Saint Tammany Parish, Louisiana

NWS New Orleans, LA issued this flash flood warning at Jun 10, 2012, 7:13 AM CDT for Saint Tammany Parish, Louisiana. It was in force for 3 hr. 2 reports came from inside the area while it was in force.

The area

The outline as issued, with what was reported inside it.

The facts

Issued
Jun 10, 2012, 7:13 AM CDT (12:13 UTC)
Expired
Jun 10, 2012, 10:15 AM CDT
In force
3 hr
Issued by
NWS New Orleans, LA
Area
Storm-based polygon
Flood severity
None

County Saint Tammany Parish, LA

What was reported inside it

TimeReportWhereRemark
Jun 10, 7:16 AM CDTFLASH FLOOD2 Ne Covington, LANWS EMPLOYEE REPORTED MULTIPLE ROADS ON THE NORTH SIDE OF COVINGTON HAD 1 TO 2 FEET OF WATER COVERING THE ROADWAY MAKING THEM IMPASSABLE.
Jun 10, 7:34 AM CDTFLASH FLOODMandeville, LANWS EMPLOYEES OBSERVED SEVERAL STREETS ACROSS MANDEVILLE WITH 1 TO 2 FEET OF WATER COVERING THE ROADWAYS MAKING THEM IMPASSIBLE.

Local storm reports filed while the alert was in force, from inside its polygon or its counties.

The nearest sounding before it

Slidell Radar S, LA (KSIL), launched 12:00Z, 0.2 hours before the alert went out and 13 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 2012-06-10Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 1831 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 2012-06-10The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 146 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
1831 J/kg
Mixed-layer CIN
-5 J/kg
Mixed-layer LCL
451 m above ground
0-6 km bulk shear
28 kt
0-1 km storm-relative helicity
146 m²/s²
0-3 km storm-relative helicity
164 m²/s²
Significant tornado parameter
0.8
Supercell composite
5.6

Open this sounding in Storm Lab

The text

As transmitted, in the capitals the NWS used until 2016.

274 
WGUS54 KLIX 101213
FFWLIX
LAC103-101515-
/O.NEW.KLIX.FF.W.0028.120610T1213Z-120610T1515Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/

BULLETIN - EAS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE NEW ORLEANS LA
713 AM CDT SUN JUN 10 2012

THE NATIONAL WEATHER SERVICE IN NEW ORLEANS HAS ISSUED A

* FLASH FLOOD WARNING FOR...
  ST. TAMMANY PARISH IN SOUTHEAST LOUISIANA...
  THIS INCLUDES THE CITIES OF...SLIDELL...MANDEVILLE...EDEN ISLE...
  COVINGTON...

* UNTIL 1015 AM CDT

* AT 711 AM CDT...NATIONAL WEATHER SERVICE METEOROLOGISTS DETECTED   
  A CLUSTER OF THUNDERSTORMS CAPABLE OF PRODUCING FLASH FLOODING     
  FROM OVER THE WARNED AREA.

* LOCATIONS IN THE WARNING INCLUDE BUT ARE NOT LIMITED TO            
  MANDEVILLE...MADISONVILLE...BUSH...SLIDELL...LACOMBE AND ABITA     
  SPRINGS.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

RAINFALL AMOUNTS OF 3 TO 5 INCHES ARE POSSIBLE IN THE WARNED AREA.

EXCESSIVE RUNOFF FROM HEAVY RAINFALL WILL CAUSE FLOODING OF SMALL
CREEKS AND STREAMS...URBAN AREAS...HIGHWAYS...STREETS AND UNDERPASSES
AS WELL AS OTHER DRAINAGE AREAS AND LOW LYING SPOTS.

A FLASH FLOOD WARNING MEANS THAT FLOODING IS IMMINENT OR OCCURRING.
IF YOU ARE IN THE WARNING AREA MOVE TO HIGHER GROUND IMMEDIATELY.
RESIDENTS LIVING ALONG STREAMS AND CREEKS SHOULD TAKE IMMEDIATE
PRECAUTIONS TO PROTECT LIFE AND PROPERTY. DO NOT ATTEMPT TO CROSS
SWIFTLY FLOWING WATERS OR WATERS OF UNKNOWN DEPTH BY FOOT OR BY
AUTOMOBILE.

&&

LAT...LON 3056 8980 3045 8968 3038 8967 3034 8963
      3029 8965 3023 8962 3018 8957 3019 8952
      3018 8953 3015 8959 3017 8968 3016 8972
      3025 8987 3026 8998 3029 8999 3036 9011
      3039 9020 3036 9024 3050 9024 3066 8983

$$

10/ARM

The office that day

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

IssuedProductOfficeCountiesLasted
Jun 10, 3:42 AM CDTSpecial Marine WarningLIX33 min
Jun 10, 4:21 AM CDTFlash Flood WarningLIXSaint Tammany, Tangipahoa3 hr
Jun 10, 6:44 AM CDTSpecial Marine WarningLIX46 min
Jun 10, 6:46 AM CDTSpecial Marine WarningLIX29 min
Jun 10, 7:34 AM CDTSpecial Marine WarningLIX56 min
Jun 10, 7:47 AM CDTSpecial Marine WarningLIX58 min
Jun 10, 8:30 AM CDTSpecial Marine WarningLIX30 min
Jun 10, 8:56 AM CDTSpecial Marine WarningLIX64 min
Jun 10, 9:26 AM CDTSpecial Marine WarningLIX34 min
Jun 10, 10:03 AM CDTSpecial Marine WarningLIX42 min
Jun 10, 10:06 AM CDTSpecial Marine WarningLIX39 min
Jun 10, 10:13 AM CDTFlash Flood WarningLIXSaint Tammany62 min
Jun 10, 10:48 AM CDTSpecial Marine WarningLIX42 min
Jun 10, 11:40 AM CDTSpecial Marine WarningLIX50 min
Jun 10, 1:38 PM CDTSpecial Marine WarningLIX37 min

Nearby

Flash Flood Warnings in Louisiana, 2012Every flash flood warning in 2012

Sources

The product and its follow-ups from the Iowa Environmental Mesonet's archive of National Weather Service and Storm Prediction Center text; local storm reports from the same archive; the sounding from the Mesonet's radiosonde archive.