Alert archive / Louisiana / Flash Flood Watches in 2012
Flash Flood Watch 7, NWS New Orleans, LA
NWS New Orleans, LA issued this flash flood watch at May 11, 2012, 4:08 AM CDT for Amite County, Pearl River County, Wilkinson County, Mississippi; 13 parishes in Louisiana. It took effect at May 11, 2012, 7:00 AM CDT. It was in force for 36 hr.
The area
The counties it named.
The facts
- Issued
- May 11, 2012, 4:08 AM CDT (09:08 UTC)
- In effect from
- May 11, 2012, 7:00 AM CDT
- Expired
- May 12, 2012, 7:10 PM CDT
- In force
- 36 hr
- Issued by
- NWS New Orleans, LA
- Flood severity
- None
Counties Assumption Parish, LA, East Baton Rouge Parish, LA, East Feliciana Parish, LA, Iberville Parish, LA, Pointe Coupee Parish, LA, Saint Bernard Parish, LA, Saint Helena Parish, LA, Saint James Parish, LA, Saint John the Baptist Parish, LA, Tangipahoa Parish, LA, Washington Parish, LA, West Baton Rouge Parish, LA, West Feliciana Parish, LA, Amite County, MS, Pearl River County, MS, Wilkinson County, MS
The nearest sounding before it
Slidell Radar S, LA (KSIL), launched 00:00Z, 9.1 hours before the alert went out and 111 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.
- Mixed-layer CAPE
- 0 J/kg
- Mixed-layer CIN
- No buoyant parcel
- Mixed-layer LCL
- 1936 m above ground
- 0-6 km bulk shear
- 22 kt
- 0-1 km storm-relative helicity
- -35 m²/s²
- 0-3 km storm-relative helicity
- 4 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted, in the capitals the NWS used until 2016.
649 WGUS64 KLIX 110908 FFALIX URGENT - IMMEDIATE BROADCAST REQUESTED FLOOD WATCH NATIONAL WEATHER SERVICE NEW ORLEANS LA 408 AM CDT FRI MAY 11 2012 ...FLASH FLOOD WATCH IN EFFECT FROM 7 AM THIS MORNING THROUGH SATURDAY EVENING... .A SLOW MOVING LOW PRESSURE SYSTEM WILL IMPACT THE AREA BEGINNING TODAY AND LINGERING INTO SATURDAY. LOCALLY HEAVY RAIN WILL BE POSSIBLE THROUGH THE PERIOD...WITH RAINFALL OF 2 TO 4 INCHES EXPECTED ON AVERAGE. HOWEVER...LOCALLY HIGHER AMOUNTS OF RAINFALL WILL BE POSSIBLE WITH HEAVIER THUNDERSTORMS. THIS HEAVY RAINFALL COULD LEAD TO LOCALIZED FLASH FLOODING ISSUES. LAZ034>037-046>050-056-057-059-065>067-MSZ068-069-111715- /O.NEW.KLIX.FF.A.0007.120511T1200Z-120513T0000Z/ /00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/ POINTE COUPEE-WEST FELICIANA-EAST FELICIANA-ST. HELENA-IBERVILLE- WEST BATON ROUGE-EAST BATON ROUGE-ASCENSION-LIVINGSTON-ASSUMPTION- ST. JAMES-UPPER LAFOURCHE-UPPER TERREBONNE-LOWER TERREBONNE- LOWER LAFOURCHE-WILKINSON-AMITE- INCLUDING THE CITIES OF...NEW ROADS...LIVONIA... ST. FRANCISVILLE...JACKSON...CLINTON...GREENSBURG...MONTPELIER... PLAQUEMINE...WHITE CASTLE...PORT ALLEN...ADDIS...BRUSLY... BATON ROUGE...GONZALES...DONALDSONVILLE...DENHAM SPRINGS... WALKER...PIERRE PART...LABADIEVILLE...PAINCOURTVILLE...LUTCHER... GRAMERCY...THIBODAUX...RACELAND...LAROSE...HOUMA...BAYOU CANE... CHAUVIN...DULAC...MONTEGUT...GALLIANO...CUT OFF...GOLDEN MEADOW... CENTREVILLE...WOODVILLE...GLOSTER...LIBERTY...CROSBY 408 AM CDT FRI MAY 11 2012 ...FLASH FLOOD WATCH IN EFFECT FROM 7 AM CDT THIS MORNING THROUGH SATURDAY EVENING... THE NATIONAL WEATHER SERVICE IN NEW ORLEANS HAS ISSUED A * FLASH FLOOD WATCH FOR PORTIONS OF SOUTHEAST LOUISIANA AND SOUTHERN MISSISSIPPI...INCLUDING THE FOLLOWING AREAS...IN SOUTHEAST LOUISIANA...ASCENSION...ASSUMPTION...EAST BATON ROUGE...EAST FELICIANA...IBERVILLE...LIVINGSTON...LOWER LAFOURCHE...LOWER TERREBONNE...POINTE COUPEE...ST. HELENA... ST. JAMES...UPPER LAFOURCHE...UPPER TERREBONNE...WEST BATON ROUGE AND WEST FELICIANA. IN SOUTHERN MISSISSIPPI...AMITE AND WILKINSON. * FROM 7 AM CDT THIS MORNING THROUGH SATURDAY EVENING * A SLOW MOVING LOW PRESSURE SYSTEM WILL BRING SEVERAL ROUNDS OF HEAVIER RAINFALL TO THE AREA. RAINFALL TOTALS OF 2 TO 4 INCHES WITH ISOLATED AMOUNTS OF UP TO 6 INCHES WILL BE POSSIBLE THROUGH SATURDAY EVENING. REPEAT AREAS OF VERY HEAVY RAINFALL MAY RESULT IN FLASH FLOODING OF STREETS...CANALS...AND LOW LYING...POORLY DRAINED AREAS. PRECAUTIONARY/PREPAREDNESS ACTIONS... A FLASH FLOOD WATCH MEANS THAT CONDITIONS MAY DEVELOP THAT LEAD TO FLASH FLOODING. FLASH FLOODING IS A VERY DANGEROUS SITUATION. YOU SHOULD MONITOR LATER FORECASTS AND BE PREPARED TO TAKE ACTION SHOULD FLASH FLOOD WARNINGS BE ISSUED. && $$ 32
7 follow-up statements
854 WGUS64 KLIX 111723 FFALIX FLOOD WATCH NATIONAL WEATHER SERVICE NEW ORLEANS LA 1223 PM CDT FRI MAY 11 2012 ...FLASH FLOOD WATCH IN EFFECT THROUGH SATURDAY EVENING... .A SLOW MOVING LOW PRESSURE SYSTEM WILL IMPACT THE AREA THROUGH SATURDAY NIGHT. LOCALLY VERY HEAVY RAIN IS EXPECTED THROUGH THE PERIOD...WITH RAINFALL OF 2 TO 4 INCHES EXPECTED ON AVERAGE. HOWEVER...LOCALLY HIGHER AMOUNTS OF RAINFALL WILL BE POSSIBLE WITH HEAVIER THUNDERSTORMS THAT REPEAT OVER THE SAME AREA. THIS HEAVY RAINFALL COULD LEAD TO LOCALIZED FLASH FLOODING ISSUES. THE FLASH FLOOD WATCH WILL LIKELY NEED TO BE EXPANDED TO THE EAST LATER TODAY. LAZ034>037-046>050-056-057-059-065>067-MSZ068-069-112330- /O.CON.KLIX.FF.A.0007.000000T0000Z-120513T0000Z/ /00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/ POINTE COUPEE-WEST FELICIANA-EAST FELICIANA-ST. HELENA-IBERVILLE- WEST BATON ROUGE-EAST BATON ROUGE-ASCENSION-LIVINGSTON-ASSUMPTION- ST. JAMES-UPPER LAFOURCHE-UPPER TERREBONNE-LOWER TERREBONNE- LOWER LAFOURCHE-WILKINSON-AMITE- INCLUDING THE CITIES OF...NEW ROADS...LIVONIA... ST. FRANCISVILLE...JACKSON...CLINTON...GREENSBURG...MONTPELIER... PLAQUEMINE...WHITE CASTLE...PORT ALLEN...ADDIS...BRUSLY... BATON ROUGE...GONZALES...DONALDSONVILLE...DENHAM SPRINGS... WALKER...PIERRE PART...LABADIEVILLE...PAINCOURTVILLE...LUTCHER... GRAMERCY...THIBODAUX...RACELAND...LAROSE...HOUMA...BAYOU CANE... CHAUVIN...DULAC...MONTEGUT...GALLIANO...CUT OFF...GOLDEN MEADOW... CENTREVILLE...WOODVILLE...GLOSTER...LIBERTY...CROSBY 1223 PM CDT FRI MAY 11 2012 ...FLASH FLOOD WATCH REMAINS IN EFFECT THROUGH SATURDAY EVENING... THE FLASH FLOOD WATCH CONTINUES FOR * PORTIONS OF SOUTHEAST LOUISIANA AND SOUTHERN MISSISSIPPI... INCLUDING THE FOLLOWING AREAS...IN SOUTHEAST LOUISIANA... ASCENSION...ASSUMPTION...EAST BATON ROUGE...EAST FELICIANA... IBERVILLE...LIVINGSTON...LOWER LAFOURCHE...LOWER TERREBONNE... POINTE COUPEE...ST. HELENA...ST. JAMES...UPPER LAFOURCHE... UPPER TERREBONNE...WEST BATON ROUGE AND WEST FELICIANA. IN SOUTHERN MISSISSIPPI...AMITE AND WILKINSON. * THROUGH SATURDAY EVENING * A SUSTAINED PERIOD OF MODERATE TO LOCALLY HEAVY RAINFALL THROUGH THIS EVENING WILL CAUSE LOCALIZED PONDING OF WATER AND POSSIBLY MINOR STREET FLOODING. THIS IS LIKELY TO SATURATE SOILS ACROSS THE WATCH AREA. A SLOW MOVING LOW PRESSURE SYSTEM WILL BRING SEVERAL ADDITIONAL ROUNDS OF HEAVIER RAINFALL TO THE AREA LATER TONIGHT INTO SATURDAY. RAINFALL TOTALS OF 2 TO 4 INCHES WITH ISOLATED AMOUNTS OF UP TO 6 INCHES WILL BE POSSIBLE THROUGH SATURDAY EVENING. REPEAT AREAS OF VERY HEAVY RAINFALL MAY RESULT IN FLASH FLOODING OF STREETS...CANALS...SMALL STREAMS...AND LOW LYING...POORLY DRAINED AREAS. PRECAUTIONARY/PREPAREDNESS ACTIONS... A FLASH FLOOD WATCH MEANS THAT CONDITIONS MAY DEVELOP THAT LEAD TO FLASH FLOODING. FLASH FLOODING IS A VERY DANGEROUS SITUATION. YOU SHOULD MONITOR LATER FORECASTS AND BE PREPARED TO TAKE ACTION SHOULD FLASH FLOOD WARNINGS BE ISSUED. && $$ 22/TD
395 WGUS64 KLIX 112030 FFALIX URGENT - IMMEDIATE BROADCAST REQUESTED FLOOD WATCH NATIONAL WEATHER SERVICE NEW ORLEANS LA 330 PM CDT FRI MAY 11 2012 ...FLASH FLOOD WATCH IN EFFECT THROUGH SATURDAY EVENING... .A SLOW MOVING LOW PRESSURE SYSTEM OVER TEXAS WILL IMPACT THE AREA THROUGH SATURDAY NIGHT. LOCALLY VERY HEAVY RAIN IS POSSIBLE THROUGH THE PERIOD...WITH RAINFALL ACCUMULATIONS OF 2 TO 4 INCHES EXPECTED ON AVERAGE. HOWEVER...LOCALLY HIGHER AMOUNTS OF RAINFALL WILL BE POSSIBLE WITH HEAVIER THUNDERSTORMS THAT REPEAT OVER THE SAME AREA...MAINLY CLOSE TO THE COAST. THIS HEAVY RAINFALL COULD LEAD TO LOCALIZED FLOODING ISSUES. MSZ068-069-112130- /O.CAN.KLIX.FF.A.0007.000000T0000Z-120513T0000Z/ /00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/ WILKINSON-AMITE- INCLUDING THE CITIES OF...CENTREVILLE...WOODVILLE...GLOSTER... LIBERTY...CROSBY 330 PM CDT FRI MAY 11 2012 ...FLASH FLOOD WATCH IS CANCELLED... THE FLASH FLOOD WATCH FOR A PORTION OF SOUTHERN MISSISSIPPI HAS BEEN CANCELLED. SOME RAINFALL IS STILL EXPECTED THROUGH SATURDAY BUT AMOUNTS SHOULD REMAIN BELOW FLOODING LEVELS. $$ LAZ039-040-058-060>064-068>072-MSZ077-080>082-120430- /O.EXA.KLIX.FF.A.0007.000000T0000Z-120513T0000Z/ /00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/ WASHINGTON-ST. TAMMANY-ST. JOHN THE BAPTIST-ST. CHARLES- UPPER JEFFERSON-ORLEANS-UPPER PLAQUEMINES-UPPER ST. BERNARD- LOWER JEFFERSON-LOWER PLAQUEMINES-LOWER ST. BERNARD- NORTHERN TANGIPAHOA-SOUTHERN TANGIPAHOA-PEARL RIVER-HANCOCK- HARRISON-JACKSON- INCLUDING THE CITIES OF...BOGALUSA...FRANKLINTON...SLIDELL... MANDEVILLE...COVINGTON...LACOMBE...LAPLACE...RESERVE... DESTREHAN...NORCO...METAIRIE...KENNER...NEW ORLEANS... BELLE CHASSE...CHALMETTE...VIOLET...PORT SULPHUR...EMPIRE... YSCLOSKEY...AMITE...KENTWOOD...HAMMOND...PONCHATOULA...PICAYUNE... BAY ST. LOUIS...WAVELAND...DIAMONDHEAD...GULFPORT...BILOXI... PASCAGOULA...OCEAN SPRINGS...MOSS POINT...GAUTIER...ST. MARTIN 330 PM CDT FRI MAY 11 2012 ...FLASH FLOOD WATCH IN EFFECT THROUGH SATURDAY EVENING... THE NATIONAL WEATHER SERVICE IN NEW ORLEANS HAS EXPANDED THE * FLASH FLOOD WATCH TO INCLUDE PORTIONS OF SOUTHEAST LOUISIANA AND SOUTHERN MISSISSIPPI...INCLUDING THE FOLLOWING AREAS...IN SOUTHEAST LOUISIANA...LOWER JEFFERSON...LOWER PLAQUEMINES... LOWER ST. BERNARD...NORTHERN TANGIPAHOA...ORLEANS...SOUTHERN TANGIPAHOA...ST. CHARLES...ST. JOHN THE BAPTIST...ST. TAMMANY...UPPER JEFFERSON...UPPER PLAQUEMINES...UPPER ST. BERNARD AND WASHINGTON. IN SOUTHERN MISSISSIPPI...HANCOCK... HARRISON...JACKSON AND PEARL RIVER. * THROUGH SATURDAY EVENING * STEADY RAINFALL THIS AFTERNOON WILL INCREASE SOIL MOISTURE CONTENT THROUGH EARLY THIS EVENING. RAIN WILL DIMINISH THIS EVENING AND PROVIDE A REPRIEVE FOR MUCH OF THE NIGHT. RAINFALL IS EXPECTED TO REDEVELOP SATURADAY MORNING AND BECOME WIDESPREAD AND PRONOUNCED FOR MUCH OF THE DAY SATURDAY. RAINFALL TOTALS OF 2 TO 4 INCHES WITH ISOLATED HIGHER AMOUNTS WILL BE POSSIBLE THROUGH SATURDAY EVENING. REPEAT AREAS OF VERY HEAVY RAINFALL MAY RESULT IN FLASH FLOODING OF STREETS...CANALS... SMALL STREAMS...AND LOW LYING...POORLY DRAINED AREAS. PRECAUTIONARY/PREPAREDNESS ACTIONS... A FLASH FLOOD WATCH MEANS THAT CONDITIONS MAY DEVELOP THAT LEAD TO FLASH FLOODING. FLASH FLOODING IS A VERY DANGEROUS SITUATION. YOU SHOULD MONITOR LATER FORECASTS AND BE PREPARED TO TAKE ACTION SHOULD FLASH FLOOD WARNINGS BE ISSUED. && $$ LAZ034>037-046>050-056-057-059-065>067-120430- /O.CON.KLIX.FF.A.0007.000000T0000Z-120513T0000Z/ /00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/ POINTE COUPEE-WEST FELICIANA-EAST FELICIANA-ST. HELENA-IBERVILLE- WEST BATON ROUGE-EAST BATON ROUGE-ASCENSION-LIVINGSTON-ASSUMPTION- ST. JAMES-UPPER LAFOURCHE-UPPER TERREBONNE-LOWER TERREBONNE- LOWER LAFOURCHE- INCLUDING THE CITIES OF...NEW ROADS...LIVONIA... ST. FRANCISVILLE...JACKSON...CLINTON...GREENSBURG...MONTPELIER... PLAQUEMINE...WHITE CASTLE...PORT ALLEN...ADDIS...BRUSLY... BATON ROUGE...GONZALES...DONALDSONVILLE...DENHAM SPRINGS... WALKER...PIERRE PART...LABADIEVILLE...PAINCOURTVILLE...LUTCHER... GRAMERCY...THIBODAUX...RACELAND...LAROSE...HOUMA...BAYOU CANE... CHAUVIN...DULAC...MONTEGUT...GALLIANO...CUT OFF...GOLDEN MEADOW 330 PM CDT FRI MAY 11 2012 ...FLASH FLOOD WATCH REMAINS IN EFFECT THROUGH SATURDAY EVENING... THE FLASH FLOOD WATCH CONTINUES FOR * A PORTION OF SOUTHEAST LOUISIANA...INCLUDING THE FOLLOWING AREAS...ASCENSION...ASSUMPTION...EAST BATON ROUGE...EAST FELICIANA...IBERVILLE...LIVINGSTON...LOWER LAFOURCHE...LOWER TERREBONNE...POINTE COUPEE...ST. HELENA...ST. JAMES...UPPER LAFOURCHE...UPPER TERREBONNE...WEST BATON ROUGE AND WEST FELICIANA. * THROUGH SATURDAY EVENING * STEADY RAINFALL THIS AFTERNOON WILL INCREASE SOIL MOISTURE CONTENT THROUGH EARLY THIS EVENING. RAIN WILL DIMINISH THIS EVENING AND PROVIDE A REPRIEVE FOR MUCH OF THE NIGHT. RAINFALL IS EXPECTED TO REDEVELOP SATURADAY MORNING AND BECOME WIDESPREAD AND PRONOUNCED FOR MUCH OF THE DAY SATURDAY. RAINFALL TOTALS OF 1 TO 3 INCHES WITH ISOLATED HIGHER AMOUNTS WILL BE POSSIBLE THROUGH SATURDAY EVENING. REPEAT AREAS OF VERY HEAVY RAINFALL MAY RESULT IN FLASH FLOODING OF STREETS...CANALS... SMALL STREAMS...AND LOW LYING...POORLY DRAINED AREAS. PRECAUTIONARY/PREPAREDNESS ACTIONS... A FLASH FLOOD WATCH MEANS THAT CONDITIONS MAY DEVELOP THAT LEAD TO FLASH FLOODING. FLASH FLOODING IS A VERY DANGEROUS SITUATION. YOU SHOULD MONITOR LATER FORECASTS AND BE PREPARED TO TAKE ACTION SHOULD FLASH FLOOD WARNINGS BE ISSUED. && $$ 24/RR
431 WGUS64 KLIX 120324 FFALIX FLOOD WATCH NATIONAL WEATHER SERVICE NEW ORLEANS LA 1024 PM CDT FRI MAY 11 2012 ...FLASH FLOOD WATCH IN EFFECT THROUGH SATURDAY EVENING... .A SLOW MOVING LOW PRESSURE SYSTEM OVER TEXAS WILL IMPACT THE AREA THROUGH SATURDAY NIGHT. LOCALLY VERY HEAVY RAIN IS POSSIBLE THROUGH THE PERIOD...WITH RAINFALL ACCUMULATIONS OF 2 TO 4 INCHES EXPECTED ON AVERAGE. HOWEVER...LOCALLY HIGHER AMOUNTS OF RAINFALL WILL BE POSSIBLE WITH HEAVIER THUNDERSTORMS THAT REPEAT OVER THE SAME AREA...MAINLY CLOSE TO THE COAST. THIS HEAVY RAINFALL COULD LEAD TO LOCALIZED FLOODING ISSUES. LAZ034>037-039-040-046>050-056>072-MSZ077-080>082-121130- /O.CON.KLIX.FF.A.0007.000000T0000Z-120513T0000Z/ /00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/ POINTE COUPEE-WEST FELICIANA-EAST FELICIANA-ST. HELENA-WASHINGTON- ST. TAMMANY-IBERVILLE-WEST BATON ROUGE-EAST BATON ROUGE-ASCENSION- LIVINGSTON-ASSUMPTION-ST. JAMES-ST. JOHN THE BAPTIST- UPPER LAFOURCHE-ST. CHARLES-UPPER JEFFERSON-ORLEANS- UPPER PLAQUEMINES-UPPER ST. BERNARD-UPPER TERREBONNE- LOWER TERREBONNE-LOWER LAFOURCHE-LOWER JEFFERSON- LOWER PLAQUEMINES-LOWER ST. BERNARD-NORTHERN TANGIPAHOA- SOUTHERN TANGIPAHOA-PEARL RIVER-HANCOCK-HARRISON-JACKSON- INCLUDING THE CITIES OF...NEW ROADS...LIVONIA... ST. FRANCISVILLE...JACKSON...CLINTON...GREENSBURG...MONTPELIER... BOGALUSA...FRANKLINTON...SLIDELL...MANDEVILLE...COVINGTON... LACOMBE...PLAQUEMINE...WHITE CASTLE...PORT ALLEN...ADDIS... BRUSLY...BATON ROUGE...GONZALES...DONALDSONVILLE... DENHAM SPRINGS...WALKER...PIERRE PART...LABADIEVILLE... PAINCOURTVILLE...LUTCHER...GRAMERCY...LAPLACE...RESERVE... THIBODAUX...RACELAND...LAROSE...DESTREHAN...NORCO...METAIRIE... KENNER...NEW ORLEANS...BELLE CHASSE...CHALMETTE...VIOLET... HOUMA...BAYOU CANE...CHAUVIN...DULAC...MONTEGUT...GALLIANO... CUT OFF...GOLDEN MEADOW...PORT SULPHUR...EMPIRE...YSCLOSKEY... AMITE...KENTWOOD...HAMMOND...PONCHATOULA...PICAYUNE... BAY ST. LOUIS...WAVELAND...DIAMONDHEAD...GULFPORT...BILOXI... PASCAGOULA...OCEAN SPRINGS...MOSS POINT...GAUTIER...ST. MARTIN 1024 PM CDT FRI MAY 11 2012 ...FLASH FLOOD WATCH REMAINS IN EFFECT THROUGH SATURDAY EVENING... THE FLASH FLOOD WATCH CONTINUES FOR * PORTIONS OF SOUTHEAST LOUISIANA AND SOUTHERN MISSISSIPPI... INCLUDING THE FOLLOWING AREAS...IN SOUTHEAST LOUISIANA... ASCENSION...ASSUMPTION...EAST BATON ROUGE...EAST FELICIANA... IBERVILLE...LIVINGSTON...LOWER JEFFERSON...LOWER LAFOURCHE... LOWER PLAQUEMINES...LOWER ST. BERNARD...LOWER TERREBONNE... NORTHERN TANGIPAHOA...ORLEANS...POINTE COUPEE...SOUTHERN TANGIPAHOA...ST. CHARLES...ST. HELENA...ST. JAMES...ST. JOHN THE BAPTIST...ST. TAMMANY...UPPER JEFFERSON...UPPER LAFOURCHE...UPPER PLAQUEMINES...UPPER ST. BERNARD...UPPER TERREBONNE...WASHINGTON...WEST BATON ROUGE AND WEST FELICIANA. IN SOUTHERN MISSISSIPPI...HANCOCK...HARRISON... JACKSON AND PEARL RIVER. * THROUGH SATURDAY EVENING * RAINFALL FROM FRIDAY AFTERNOON HAS INCREASED SOIL MOISTURE. RAIN WILL DIMINISH TONIGHT AND PROVIDE A REPRIEVE FOR MUCH OF THE OVERNIGHT HOURS. RAINFALL IS EXPECTED TO REDEVELOP SATURDAY MORNING AND BECOME WIDESPREAD AND PRONOUNCED FOR MUCH OF THE DAY SATURDAY. RAINFALL TOTALS OF 1 TO 3 INCHES WITH ISOLATED HIGHER AMOUNTS WILL BE POSSIBLE THROUGH SATURDAY EVENING. REPEAT AREAS OF VERY HEAVY RAINFALL MAY RESULT IN FLASH FLOODING OF STREETS... CANALS... SMALL STREAMS...AND LOW LYING...POORLY DRAINED AREAS. PRECAUTIONARY/PREPAREDNESS ACTIONS... A FLASH FLOOD WATCH MEANS THAT CONDITIONS MAY DEVELOP THAT LEAD TO FLASH FLOODING. FLASH FLOODING IS A VERY DANGEROUS SITUATION. YOU SHOULD MONITOR LATER FORECASTS AND BE PREPARED TO TAKE ACTION SHOULD FLASH FLOOD WARNINGS BE ISSUED. && $$ 13/MH
610 WGUS64 KLIX 120438 FFALIX FLOOD WATCH NATIONAL WEATHER SERVICE NEW ORLEANS LA 1138 PM CDT FRI MAY 11 2012 ...FLASH FLOOD WATCH IN EFFECT THROUGH SATURDAY EVENING... .A SLOW MOVING LOW PRESSURE SYSTEM OVER TEXAS WILL IMPACT THE AREA THROUGH SATURDAY NIGHT. LOCALLY VERY HEAVY RAIN IS POSSIBLE THROUGH THE PERIOD...WITH RAINFALL ACCUMULATIONS OF 2 TO 4 INCHES EXPECTED ON AVERAGE. HOWEVER...LOCALLY HIGHER AMOUNTS OF RAINFALL WILL BE POSSIBLE WITH HEAVIER THUNDERSTORMS THAT REPEAT OVER THE SAME AREA...MAINLY CLOSE TO THE COAST. THIS HEAVY RAINFALL COULD LEAD TO LOCALIZED FLOODING ISSUES. LAZ034>037-039-040-046>050-056>072-MSZ077-080>082-121245- /O.CON.KLIX.FF.A.0007.000000T0000Z-120513T0000Z/ /00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/ POINTE COUPEE-WEST FELICIANA-EAST FELICIANA-ST. HELENA-WASHINGTON- ST. TAMMANY-IBERVILLE-WEST BATON ROUGE-EAST BATON ROUGE-ASCENSION- LIVINGSTON-ASSUMPTION-ST. JAMES-ST. JOHN THE BAPTIST- UPPER LAFOURCHE-ST. CHARLES-UPPER JEFFERSON-ORLEANS- UPPER PLAQUEMINES-UPPER ST. BERNARD-UPPER TERREBONNE- LOWER TERREBONNE-LOWER LAFOURCHE-LOWER JEFFERSON- LOWER PLAQUEMINES-LOWER ST. BERNARD-NORTHERN TANGIPAHOA- SOUTHERN TANGIPAHOA-PEARL RIVER-HANCOCK-HARRISON-JACKSON- INCLUDING THE CITIES OF...NEW ROADS...LIVONIA... ST. FRANCISVILLE...JACKSON...CLINTON...GREENSBURG...MONTPELIER... BOGALUSA...FRANKLINTON...SLIDELL...MANDEVILLE...COVINGTON... LACOMBE...PLAQUEMINE...WHITE CASTLE...PORT ALLEN...ADDIS... BRUSLY...BATON ROUGE...GONZALES...DONALDSONVILLE... DENHAM SPRINGS...WALKER...PIERRE PART...LABADIEVILLE... PAINCOURTVILLE...LUTCHER...GRAMERCY...LAPLACE...RESERVE... THIBODAUX...RACELAND...LAROSE...DESTREHAN...NORCO...METAIRIE... KENNER...NEW ORLEANS...BELLE CHASSE...CHALMETTE...VIOLET... HOUMA...BAYOU CANE...CHAUVIN...DULAC...MONTEGUT...GALLIANO... CUT OFF...GOLDEN MEADOW...PORT SULPHUR...EMPIRE...YSCLOSKEY... AMITE...KENTWOOD...HAMMOND...PONCHATOULA...PICAYUNE... BAY ST. LOUIS...WAVELAND...DIAMONDHEAD...GULFPORT...BILOXI... PASCAGOULA...OCEAN SPRINGS...MOSS POINT...GAUTIER...ST. MARTIN 1138 PM CDT FRI MAY 11 2012 ...FLASH FLOOD WATCH REMAINS IN EFFECT THROUGH SATURDAY EVENING... THE FLASH FLOOD WATCH CONTINUES FOR * PORTIONS OF SOUTHEAST LOUISIANA AND SOUTHERN MISSISSIPPI... INCLUDING THE FOLLOWING AREAS...IN SOUTHEAST LOUISIANA... ASCENSION...ASSUMPTION...EAST BATON ROUGE...EAST FELICIANA... IBERVILLE...LIVINGSTON...LOWER JEFFERSON...LOWER LAFOURCHE... LOWER PLAQUEMINES...LOWER ST. BERNARD...LOWER TERREBONNE... NORTHERN TANGIPAHOA...ORLEANS...POINTE COUPEE...SOUTHERN TANGIPAHOA...ST. CHARLES...ST. HELENA...ST. JAMES...ST. JOHN THE BAPTIST...ST. TAMMANY...UPPER JEFFERSON...UPPER LAFOURCHE...UPPER PLAQUEMINES...UPPER ST. BERNARD...UPPER TERREBONNE...WASHINGTON...WEST BATON ROUGE AND WEST FELICIANA. IN SOUTHERN MISSISSIPPI...HANCOCK...HARRISON... JACKSON AND PEARL RIVER. * THROUGH SATURDAY EVENING * RAINFALL FROM FRIDAY AFTERNOON HAS INCREASED SOIL MOISTURE. RAIN WILL DIMINISH TONIGHT AND PROVIDE A REPRIEVE FOR MUCH OF THE OVERNIGHT HOURS. RAINFALL IS EXPECTED TO REDEVELOP SATURDAY MORNING AND BECOME WIDESPREAD AND PRONOUNCED FOR MUCH OF THE DAY SATURDAY. RAINFALL TOTALS OF 2 TO 4 INCHES WITH ISOLATED HIGHER AMOUNTS WILL BE POSSIBLE THROUGH SATURDAY EVENING. REPEAT AREAS OF VERY HEAVY RAINFALL MAY RESULT IN FLASH FLOODING OF STREETS... CANALS... SMALL STREAMS...AND LOW LYING...POORLY DRAINED AREAS. PRECAUTIONARY/PREPAREDNESS ACTIONS... A FLASH FLOOD WATCH MEANS THAT CONDITIONS MAY DEVELOP THAT LEAD TO FLASH FLOODING. FLASH FLOODING IS A VERY DANGEROUS SITUATION. YOU SHOULD MONITOR LATER FORECASTS AND BE PREPARED TO TAKE ACTION SHOULD FLASH FLOOD WARNINGS BE ISSUED. && $$ 13/MH
238 WGUS64 KLIX 120952 FFALIX FLOOD WATCH NATIONAL WEATHER SERVICE NEW ORLEANS LA 452 AM CDT SAT MAY 12 2012 ...FLASH FLOOD WATCH IN EFFECT THROUGH SATURDAY EVENING... .A SLOW MOVING LOW PRESSURE SYSTEM OVER TEXAS WILL IMPACT THE AREA THROUGH TONIGHT. LOCALLY VERY HEAVY RAIN IS STILL POSSIBLE THROUGH THE PERIOD...WITH RAINFALL ACCUMULATIONS OF 2 TO 4 INCHES EXPECTED ON AVERAGE. HOWEVER...LOCALLY HIGHER AMOUNTS OF RAINFALL WILL BE POSSIBLE WITH HEAVIER THUNDERSTORMS THAT REPEAT OVER THE SAME AREA...MAINLY CLOSE TO THE COAST. THIS HEAVY RAINFALL COULD LEAD TO LOCALIZED FLOODING ISSUES. LAZ034>037-039-040-046>050-056>072-MSZ077-080>082-121800- /O.CON.KLIX.FF.A.0007.000000T0000Z-120513T0000Z/ /00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/ POINTE COUPEE-WEST FELICIANA-EAST FELICIANA-ST. HELENA-WASHINGTON- ST. TAMMANY-IBERVILLE-WEST BATON ROUGE-EAST BATON ROUGE-ASCENSION- LIVINGSTON-ASSUMPTION-ST. JAMES-ST. JOHN THE BAPTIST- UPPER LAFOURCHE-ST. CHARLES-UPPER JEFFERSON-ORLEANS- UPPER PLAQUEMINES-UPPER ST. BERNARD-UPPER TERREBONNE- LOWER TERREBONNE-LOWER LAFOURCHE-LOWER JEFFERSON- LOWER PLAQUEMINES-LOWER ST. BERNARD-NORTHERN TANGIPAHOA- SOUTHERN TANGIPAHOA-PEARL RIVER-HANCOCK-HARRISON-JACKSON- INCLUDING THE CITIES OF...NEW ROADS...LIVONIA... ST. FRANCISVILLE...JACKSON...CLINTON...GREENSBURG...MONTPELIER... BOGALUSA...FRANKLINTON...SLIDELL...MANDEVILLE...COVINGTON... LACOMBE...PLAQUEMINE...WHITE CASTLE...PORT ALLEN...ADDIS... BRUSLY...BATON ROUGE...GONZALES...DONALDSONVILLE... DENHAM SPRINGS...WALKER...PIERRE PART...LABADIEVILLE... PAINCOURTVILLE...LUTCHER...GRAMERCY...LAPLACE...RESERVE... THIBODAUX...RACELAND...LAROSE...DESTREHAN...NORCO...METAIRIE... KENNER...NEW ORLEANS...BELLE CHASSE...CHALMETTE...VIOLET... HOUMA...BAYOU CANE...CHAUVIN...DULAC...MONTEGUT...GALLIANO... CUT OFF...GOLDEN MEADOW...PORT SULPHUR...EMPIRE...YSCLOSKEY... AMITE...KENTWOOD...HAMMOND...PONCHATOULA...PICAYUNE... BAY ST. LOUIS...WAVELAND...DIAMONDHEAD...GULFPORT...BILOXI... PASCAGOULA...OCEAN SPRINGS...MOSS POINT...GAUTIER...ST. MARTIN 452 AM CDT SAT MAY 12 2012 ...FLASH FLOOD WATCH REMAINS IN EFFECT THROUGH THIS EVENING... THE FLASH FLOOD WATCH CONTINUES FOR * PORTIONS OF SOUTHEAST LOUISIANA AND SOUTHERN MISSISSIPPI... INCLUDING THE FOLLOWING AREAS...IN SOUTHEAST LOUISIANA... ASCENSION...ASSUMPTION...EAST BATON ROUGE...EAST FELICIANA... IBERVILLE...LIVINGSTON...LOWER JEFFERSON...LOWER LAFOURCHE... LOWER PLAQUEMINES...LOWER ST. BERNARD...LOWER TERREBONNE... NORTHERN TANGIPAHOA...ORLEANS...POINTE COUPEE...SOUTHERN TANGIPAHOA...ST. CHARLES...ST. HELENA...ST. JAMES...ST. JOHN THE BAPTIST...ST. TAMMANY...UPPER JEFFERSON...UPPER LAFOURCHE...UPPER PLAQUEMINES...UPPER ST. BERNARD...UPPER TERREBONNE...WASHINGTON...WEST BATON ROUGE AND WEST FELICIANA. IN SOUTHERN MISSISSIPPI...HANCOCK...HARRISON... JACKSON AND PEARL RIVER. * THROUGH THIS EVENING * RAINFALL FROM FRIDAY AFTERNOON HAS INCREASED SOIL MOISTURE. RAIN HAS ALREADY REDEVELOPED ACROSS SOUTHEASTERN TEXAS OVERNIGHT AND WILL SPREAD EAST IMPACTING THE WATCH AREA FOR MUCH OF THE DAY SATURDAY. RAINFALL TOTALS OF 2 TO 4 INCHES WITH ISOLATED HIGHER AMOUNTS WILL BE POSSIBLE THROUGH THIS EVENING. REPEAT AREAS OF VERY HEAVY RAINFALL MAY RESULT IN FLASH FLOODING OF STREETS... CANALS... SMALL STREAMS...AND LOW LYING...POORLY DRAINED AREAS. PRECAUTIONARY/PREPAREDNESS ACTIONS... A FLASH FLOOD WATCH MEANS THAT CONDITIONS MAY DEVELOP THAT LEAD TO FLASH FLOODING. FLASH FLOODING IS A VERY DANGEROUS SITUATION. YOU SHOULD MONITOR LATER FORECASTS AND BE PREPARED TO TAKE ACTION SHOULD FLASH FLOOD WARNINGS BE ISSUED. && $$ CAB
806 WGUS64 KLIX 122101 FFALIX URGENT - IMMEDIATE BROADCAST REQUESTED FLOOD WATCH NATIONAL WEATHER SERVICE NEW ORLEANS LA 401 PM CDT SAT MAY 12 2012 ...FLASH FLOOD WATCH IN EFFECT THROUGH SATURDAY EVENING... .A SLOW MOVING COLD FRONT AND LOW PRESSURE SYSTEM OVER CENTRAL LOUISIANA WILL IMPACT THE AREA THROUGH TONIGHT. LOCALLY VERY HEAVY RAIN IS STILL POSSIBLE...WITH RAINFALL ACCUMULATIONS OF 2 TO 3 INCHES EXPECTED. HOWEVER...LOCALLY HIGHER AMOUNTS OF RAINFALL WILL BE POSSIBLE WITH HEAVIER THUNDERSTORMS THAT REPEAT OVER THE SAME AREA...MAINLY CLOSE TO THE COAST. THIS HEAVY RAINFALL COULD LEAD TO LOCALIZED FLOODING ISSUES. LAZ034>037-046>050-122215- /O.CAN.KLIX.FF.A.0007.000000T0000Z-120513T0000Z/ /00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/ POINTE COUPEE-WEST FELICIANA-EAST FELICIANA-ST. HELENA-IBERVILLE- WEST BATON ROUGE-EAST BATON ROUGE-ASCENSION-LIVINGSTON- INCLUDING THE CITIES OF...NEW ROADS...LIVONIA... ST. FRANCISVILLE...JACKSON...CLINTON...GREENSBURG...MONTPELIER... PLAQUEMINE...WHITE CASTLE...PORT ALLEN...ADDIS...BRUSLY... BATON ROUGE...GONZALES...DONALDSONVILLE...DENHAM SPRINGS...WALKER 401 PM CDT SAT MAY 12 2012 ...FLASH FLOOD WATCH IS CANCELLED... THE FLASH FLOOD WATCH FOR A PORTION OF SOUTHEAST LOUISIANA HAS BEEN CANCELLED. THE THREAT OF HEAVY RAIN HAS DIMINISHED AND MOVED EAST OF THE AREA. $$ LAZ039-040-056>072-MSZ077-080>082-130515- /O.EXT.KLIX.FF.A.0007.000000T0000Z-120513T0600Z/ /00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/ WASHINGTON-ST. TAMMANY-ASSUMPTION-ST. JAMES-ST. JOHN THE BAPTIST- UPPER LAFOURCHE-ST. CHARLES-UPPER JEFFERSON-ORLEANS- UPPER PLAQUEMINES-UPPER ST. BERNARD-UPPER TERREBONNE- LOWER TERREBONNE-LOWER LAFOURCHE-LOWER JEFFERSON- LOWER PLAQUEMINES-LOWER ST. BERNARD-NORTHERN TANGIPAHOA- SOUTHERN TANGIPAHOA-PEARL RIVER-HANCOCK-HARRISON-JACKSON- INCLUDING THE CITIES OF...BOGALUSA...FRANKLINTON...SLIDELL... MANDEVILLE...COVINGTON...LACOMBE...PIERRE PART...LABADIEVILLE... PAINCOURTVILLE...LUTCHER...GRAMERCY...LAPLACE...RESERVE... THIBODAUX...RACELAND...LAROSE...DESTREHAN...NORCO...METAIRIE... KENNER...NEW ORLEANS...BELLE CHASSE...CHALMETTE...VIOLET... HOUMA...BAYOU CANE...CHAUVIN...DULAC...MONTEGUT...GALLIANO... CUT OFF...GOLDEN MEADOW...PORT SULPHUR...EMPIRE...YSCLOSKEY... AMITE...KENTWOOD...HAMMOND...PONCHATOULA...PICAYUNE... BAY ST. LOUIS...WAVELAND...DIAMONDHEAD...GULFPORT...BILOXI... PASCAGOULA...OCEAN SPRINGS...MOSS POINT...GAUTIER...ST. MARTIN 401 PM CDT SAT MAY 12 2012 ...FLASH FLOOD WATCH NOW IN EFFECT UNTIL 1 AM CDT SUNDAY... THE FLASH FLOOD WATCH IS NOW IN EFFECT FOR * PORTIONS OF SOUTHEAST LOUISIANA AND SOUTHERN MISSISSIPPI... INCLUDING THE FOLLOWING AREAS...IN SOUTHEAST LOUISIANA... ASSUMPTION...LOWER JEFFERSON...LOWER LAFOURCHE...LOWER PLAQUEMINES...LOWER ST. BERNARD...LOWER TERREBONNE...NORTHERN TANGIPAHOA...ORLEANS...SOUTHERN TANGIPAHOA...ST. CHARLES... ST. JAMES...ST. JOHN THE BAPTIST...ST. TAMMANY...UPPER JEFFERSON...UPPER LAFOURCHE...UPPER PLAQUEMINES...UPPER ST. BERNARD...UPPER TERREBONNE AND WASHINGTON. IN SOUTHERN MISSISSIPPI...HANCOCK...HARRISON...JACKSON AND PEARL RIVER. * UNTIL 1 AM CDT SUNDAY * RAINFALL FROM FRIDAY HAS INCREASED SOIL MOISTURE. RAIN HAS ALREADY MOVED ACROSS COASTAL LOUISIANA TODAY AND WILL SPREAD EAST IMPACTING THE MISSISSIPPI COASTAL COUNTIES THROUGH MOST OF TONIGHT. RAINFALL TOTALS OF 2 TO 3 INCHES WITH ISOLATED HIGHER AMOUNTS WILL BE POSSIBLE. REPEAT AREAS OF VERY HEAVY RAINFALL MAY RESULT IN FLASH FLOODING OF STREETS... CANALS... SMALL STREAMS...AND LOW LYING...POORLY DRAINED AREAS. PRECAUTIONARY/PREPAREDNESS ACTIONS... A FLASH FLOOD WATCH MEANS THAT CONDITIONS MAY DEVELOP THAT LEAD TO FLASH FLOODING. FLASH FLOODING IS A VERY DANGEROUS SITUATION. YOU SHOULD MONITOR LATER FORECASTS AND BE PREPARED TO TAKE ACTION SHOULD FLASH FLOOD WARNINGS BE ISSUED. && $$
563 WGUS64 KLIX 130010 FFALIX FLOOD WATCH NATIONAL WEATHER SERVICE NEW ORLEANS LA 710 PM CDT SAT MAY 12 2012 ...FLASH FLOOD WATCH IS CANCELLED... .A SLOW MOVING COLD FRONT AND LOW PRESSURE SYSTEM OVER CENTRAL LOUISIANA WILL CONTINUE TO IMPACT THE AREA TONIGHT. SHOWERS AND THUNDERSTORMS ARE STILL POSSIBLE TONIGHT BUT HEAVIEST RAINFALL HAS REMAINED OFF THE COAST OF LOUISIANA TODAY. HEAVIEST RAINFALL HAS MOVED EAST OF THE FORECAST AREA AND WIDESPREAD FLOODING ISSUES ARE NOT EXPECTED. LAZ039-040-056>072-MSZ077-080>082-130115- /O.CAN.KLIX.FF.A.0007.000000T0000Z-120513T0600Z/ /00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/ WASHINGTON-ST. TAMMANY-ASSUMPTION-ST. JAMES-ST. JOHN THE BAPTIST- UPPER LAFOURCHE-ST. CHARLES-UPPER JEFFERSON-ORLEANS- UPPER PLAQUEMINES-UPPER ST. BERNARD-UPPER TERREBONNE- LOWER TERREBONNE-LOWER LAFOURCHE-LOWER JEFFERSON- LOWER PLAQUEMINES-LOWER ST. BERNARD-NORTHERN TANGIPAHOA- SOUTHERN TANGIPAHOA-PEARL RIVER-HANCOCK-HARRISON-JACKSON- INCLUDING THE CITIES OF...BOGALUSA...FRANKLINTON...SLIDELL... MANDEVILLE...COVINGTON...LACOMBE...PIERRE PART...LABADIEVILLE... PAINCOURTVILLE...LUTCHER...GRAMERCY...LAPLACE...RESERVE... THIBODAUX...RACELAND...LAROSE...DESTREHAN...NORCO...METAIRIE... KENNER...NEW ORLEANS...BELLE CHASSE...CHALMETTE...VIOLET... HOUMA...BAYOU CANE...CHAUVIN...DULAC...MONTEGUT...GALLIANO... CUT OFF...GOLDEN MEADOW...PORT SULPHUR...EMPIRE...YSCLOSKEY... AMITE...KENTWOOD...HAMMOND...PONCHATOULA...PICAYUNE... BAY ST. LOUIS...WAVELAND...DIAMONDHEAD...GULFPORT...BILOXI... PASCAGOULA...OCEAN SPRINGS...MOSS POINT...GAUTIER...ST. MARTIN 710 PM CDT SAT MAY 12 2012 ...FLASH FLOOD WATCH IS CANCELLED... THE FLASH FLOOD WATCH FOR PORTIONS OF SOUTHEAST LOUISIANA AND SOUTHERN MISSISSIPPI HAS BEEN CANCELLED. THE THREAT OF HEAVY RAIN HAS DIMINISHED AND MOVED EAST OF THE AREA. SHOWERS AND THUNDERSTORMS ARE STILL POSSIBLE BUT WIDESPREAD FLOODING PROBLEMS ARE NOT EXPECTED. $$ 13/MH
What forecasters said that day
The local office's own words before this flash flood watch went out, as it sent them, from the Iowa Environmental Mesonet's archive of National Weather Service text.
NWS New Orleans, LA wrote its last area forecast discussion before this flash flood watch went out at May 11, 3:57 AM CDT, 11 minutes earlier.
Area forecast discussion, May 11, 3:57 AM CDT, 11 minutes before
AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE NEW ORLEANS LA
357 AM CDT FRI MAY 11 2012
.SHORT TERM...
BUMPED UP POPS FOR THE ENTIRE AREA FOR TODAY...AS A STRONG SQUALL
LINE CURRENTLY MOVING OFF THE TEXAS COAST SHOULD HOLD TOGETHER AND
BEGIN TO IMPACT THE WESTERN PORTION OF THE FORECAST BY MID-
MORNING. HAVE ALSO HOISTED A FLASH FLOOD WATCH FOR THE WESTERN
ZONES BEGINNING THIS MORNING AND CONTINUING THROUGH SATURDAY
EVENING. EXPECT TO SEE THE WATCH EXTENDED FURTHER TO THE EAST BY
TONIGHT...AS HEAVY RAINS WILL BECOME A THREAT ACROSS ALL OF
SOUTHEAST LOUISIANA AND SOUTHERN MISSISSIPPI BY TONIGHT. THE
SEVERE THREAT MAY BEGIN TO DIMINISH...AS THE LINE OF THUNDERSTORMS
IS EXPECTED TO WEAKEN AS IT MOVES INTO THE ATCHAFALAYA BASIN.
THIS UNSETTLED WEATHER PATTERN IS BEING DRIVEN BY A SLOW MOVING
CUT OFF LOW PRESSURE SYSTEM CURRENTLY PARKED OVER TEXAS. THIS SLOW
MOVING TROUGH WILL GRADUALLY MOVE INTO THE LOWER MISSISSIPPI
VALLEY BY SATURDAY NIGHT. IN THE LOW LEVELS...A WEAK SURFACE
REFLECTION WILL MOVE THROUGH THE CENTRAL GULF COAST. WITH AMPLE
FORCING AND MOISTURE IN PLACE...EXPECT TO SEE SEVERAL ROUNDS OF
CONVECTIVE ACTIVITY IMPACT THE FORECAST AREA TODAY AND TOMORROW.
PW VALUES OF AROUND 1.75 INCHES...COMBINED WITH THE PROSPECT OF
THUNDERSTORMS REDEVELOPING AND TRAINING OVER THE SAME
AREAS...COULD LEAD TO LOCALIZED FLOODING ISSUES IN THE REGION.
RAINFALL OF 2 TO 4 INCHES ON AVERAGE WILL BE POSSIBLE FROM TODAY
THROUGH SATURDAY NIGHT...WITH LOCALLY HIGHER AMOUNTS POSSIBLE.
THERE COULD ALSO BE A FEW ISOLATED STRONGER THUNDERSTORMS ON
SATURDAY...AS THE ATMOSPHERE WILL BE FAIRLY UNSTABLE...WITH CAPE
VALUES OF 1000-1500 J/KG. THE MAIN THREAT FROM THESE STRONGER
STORMS...OUTSIDE OF FLOODING RAINS...WILL BE WET MICROBURSTS AND
FREQUENT LIGHTNING. A
CONDITIONS WILL BEGIN TO IMPROVE SATURDAY NIGHT INTO SUNDAY...AS
SOME MID-LEVEL DRY AIR FEEDS INTO THE REGION AT THE BASE OF THE
UPPER LEVEL TROUGH. THIS DRIER AIR WILL ADVECT IN FROM THE MEXICAN
PLATEAU...AND WILL HELP TO EFFECTIVELY END THE HEAVY RAIN THREAT
BY SUNDAY. WITH DRIER AIR FILTERING INTO THE AREA...PW VALUES WILL
FALL TO AROUND 1.25 INCHES ON SUNDAY...BUT ENOUGH
MOISTURE...INSTABILITY...AND LIFT WILL REMAIN IN PLACE TO SPARK
OFF SCATTERED CONVECTION THROUGH THE DAY.
.LONG TERM...
AS THE UPPER LEVEL TROUGH AXIS AND SURFACE REFLECTION SHIFT TO
THE EAST...NORTHERLY FLOW WILL TAKE HOLD SUNDAY NIGHT AND REMAIN
IN PLACE THROUGH TUESDAY. WEAK RIDGING WILL ALSO BUILD OVER THE
AREA...WHICH WILL LIMIT CONVECTIVE POTENTIAL FOR MONDAY AND
TUESDAY. HOWEVER...CANNOT COMPLETELY RULE OUT SOME DIURNALLY
FORCED CONVECTION DEVELOPING ALONG LOCAL MESOSCALE BOUNDARIES. AS
A RESULT...HAVE SLIGHT CHANCE POPS IN PLACE BOTH DAYS.
TEMPERATURES WILL REMAIN NEAR NORMAL FOR BOTH MONDAY AND TUESDAY.
HEADING INTO WEDNESDAY AND THURSDAY OF NEXT WEEK...BOTH THE EURO
AND THE GFS SHOW ANOTHER CUT OFF FEATURE EXITING THE FOUR CORNERS
AND SLIDING INTO THE LOWER MISSISSIPPI VALLEY. INCREASING PVA AND
ASSOCIATED LIFT...COMBINED WITH INCREASED DEEP LAYER MOISTURE
SHOULD ALLOW FOR GREATER CONVECTIVE COVERAGE ON WEDNESDAY. HAVE
BUMPED UP POPS FOR WEDNESDAY...AND INCREASED COVERAGE FOR THE
OVERNIGHT HOURS AS WELL. FORTUNATELY...THE SEVERE THREAT WITH THIS
SYSTEM LOOKS LOW AT THIS TIME...DUE TO A LACK OF STRONG SHEAR.
HOWEVER...WITH AMPLE INSTABILITY AND FAIRLY DECENT LAPSE RATES IN
PLACE...A FEW STRONGER THUNDERSTORMS COULD NOT BE RULED OUT FOR
WEDNESDAY.
&&
.MARINE...HIGH PRESSURE CNTRD OVER THE OHIO VALLEY AT 8Z WILL
CONTINUE TO WORK TO THE EAST TWRDS THE MID ATLANTIC COAST THROUGH
TODAY AND TOMORROW. AT THE SAME TIME AN AREA OF LOW PRESSURE OVER TX
WILL MOVE TO THE NORTHEAST ACROSS THE NWRN GULF AND INTO THE LOWER
MS VALLEY. THIS WILL NOT BE A WELL DEFINED SFC LOW BUT IT WILL LEAD
TO A TIGHTENING OF THE PRESSURE GRADIENT ACROSS THE REGION TODAY
WITH ESE-SE WINDS OF 20 KTS OVER THE COASTAL WATERS WEST OF THE MS
DELTA BY LATE MORNING. EAST OF THE DELTA WINDS WILL RESPOND A LITTLE
SLOWER BUT COULD APPROACH 20 KTS BY LATE AFTN/EARLY EVNG. SEAS IN
THE OUTER WATERS WILL RESPOND AND COULD APPROACH 7FT THIS AFTN AND
WITH WINDS ALREADY ERLY TO ESERLY OVER THE GULF WE MAY BE ABLE TO
DEVELOP A WEAK SWELL TRAIN BY EARLY SAT. A SCY WILL BE ISSUED
BEGINNING AT 16Z OVER THE WATERS WEST OF THE DELTA AND A FEW OF THE
COASTAL ZONES EAST OF THE DELTA MAY NEED TO BE ADDED LATE THIS AFTN
OR THIS EVNG. IN ADDITION TO THE HAZARDOUS WINDS/SEAS THERE COULD BE
STRONG TO SVR STORMS ACROSS THE GULF WATERS TODAY WITH WIDESPREAD
SHRA/TSRA ACTIVITY TOMORROW AS WELL. OF COURSE VERY STRONG WINDS AND
WATERSPOUTS WILL BE POSSIBLE WITH ANY ACTIVITY THAT MOVES IN FROM
THE WEST TODAY. CONDITIONS WILL BEGIN TO IMPROVE ON SUNDAY BUT MORE
SO NEXT WEEK AS A WEAK SFC PRESSURE FIELD DEVELOPS OVER THE GULF
STATES. /CAB/
&&
.AVIATION...THROUGH 14/15Z MOST TERMINALS SHOULD REMAIN IN VFR BUT
AFTER THAT A FEW OF OUR WRN TERMINALS COULD BEGIN TO BE IMPACTED BY
CONVECTION. A LARGE AREA OF SHRA AND TSRA...SOME SEVERE...ARE
QUICKLY PUSHING TO THE EAST OFF THE UPPER TX COAST AND INTO SWRN LA.
THIS ACTIVITY WOULD MAINLY IMPACT BTR AND HUM AROUND 14Z AND THEN
COULD BEGIN TO IMPACT MSY/NEW/HDC AROUND 16Z. THIS IS HIGHLY
DEPENDENT ON THE MCS BEING ABLE TO MAINTAIN ITS CURRENT INTENSITY AND
FORWARD SPEED WHICH WE BELIEVE WILL BOTH WEAKEN SOME AND SLOW DOWN A
TAD...LIKELY NOT IMPACTING MSY UNTIL MAYBE CLOSER TO 18/19Z. OF
COURSE WITH ANY SHRA OR TSRA BOTH VSBYS AND CIGS WILL DROP AND
LIKELY DOWN TO IFR IF NOT LIFR(VSBYS). GUSTY WINDS ASSOCIATED WITH
TSRA WILL ALSO BE POSSIBLE. TERMINALS ACROSS THE MS COAST AND MCB
SHOULD REMAIN IN VFR STATUS LONGER AND MAY NOT BE IMPACTED BY
CONVECTION UNTIL AFTER 21/00Z. /CAB/
&&
.DECISION SUPPORT...
DSS CODE...BLUE
DEPLOYED...NONE
ACTIVATION...NONE
ACTIVITIES...FLASH FLOOD WATCH IN EFFECT 12Z(TODAY)-00Z(SUN).
SMALL CRAFT ADVISORY IN EFFECT 16Z-00Z.
RADAR COVERAGE FOR POSSIBLE SEVERE WILL BE NEEDED
FOR TODAY.
DECISION SUPPORT SERVICES (DSS) CODE LEGEND
GREEN = NO WEATHER IMPACTS THAT REQUIRE ACTION
BLUE = LONG FUSED WATCH/WARNING/ADVISORY IN EFFECT OR HIGH
VISIBILITY EVENT
YELLOW = HEIGHTENED IMPACTS WITH SHORT FUSED
WATCH/WARNING/ADVISORY ISSUANCES; RADAR SUPPORT
ORANGE = HIGH IMPACTS - SLIGHT TO MODERATE RISK SEVERE; NEARBY
TROPICAL EVENTS; HAZMAT OR OTHER LARGE EPISODES
RED = FULL ENGAGEMENT FOR MODERATE TO HIGH RISK SVR AND/OR
DIRECT TROPICAL THREATS; EVENTS OF NATIONAL SIGNIFICANCE
&&
.PRELIMINARY POINT TEMPS/POPS...
MCB 80 60 80 64 / 40 50 80 40
BTR 82 63 82 65 / 50 60 80 40
ASD 80 63 80 66 / 20 50 80 40
MSY 82 70 82 70 / 40 50 80 40
GPT 80 65 80 68 / 20 40 80 60
PQL 80 62 80 67 / 10 40 80 60
&&
.LIX WATCHES/WARNINGS/ADVISORIES...
LA...FLASH FLOOD WATCH FROM 7 AM FRIDAY TO 7 PM SATURDAY FOR THE
FOLLOWING ZONES: ASCENSION...ASSUMPTION...EAST BATON
ROUGE...EAST FELICIANA...IBERVILLE...LIVINGSTON...LOWER
LAFOURCHE...LOWER TERREBONNE...POINTE COUPEE...ST.
HELENA...ST. JAMES...UPPER LAFOURCHE...UPPER
TERREBONNE...WEST BATON ROUGE...AND WEST FELICIANA.
GM...SMALL CRAFT ADVISORY FROM 11 AM FRIDAY TO 7 PM FRIDAY FOR THE
FOLLOWING ZONES: COASTAL WATERS FROM PORT FOURCHON TO LOWER
ATCHAFALAYA RIVER FROM 20 TO 60 NM...COASTAL WATERS FROM
PORT FOURCHON TO LOWER ATCHAFALAYA RIVER OUT 20
NM...COASTAL WATERS FROM THE SOUTHWEST PASS OF THE
MISSISSIPPI RIVER TO PORT FOURCHON FROM 20 TO 60 NM...AND
COASTAL WATERS FROM THE SOUTHWEST PASS OF THE MISSISSIPPI
RIVER TO PORT FOURCHON OUT 20 NM.
MS...FLASH FLOOD WATCH FROM 7 AM FRIDAY TO 7 PM SATURDAY FOR THE
FOLLOWING ZONES: AMITE...AND WILKINSON.
GM...SMALL CRAFT ADVISORY FROM 11 AM FRIDAY TO 7 PM FRIDAY FOR THE
FOLLOWING ZONES: COASTAL WATERS FROM PORT FOURCHON TO LOWER
ATCHAFALAYA RIVER FROM 20 TO 60 NM...COASTAL WATERS FROM
PORT FOURCHON TO LOWER ATCHAFALAYA RIVER OUT 20
NM...COASTAL WATERS FROM THE SOUTHWEST PASS OF THE
MISSISSIPPI RIVER TO PORT FOURCHON FROM 20 TO 60 NM...AND
COASTAL WATERS FROM THE SOUTHWEST PASS OF THE MISSISSIPPI
RIVER TO PORT FOURCHON OUT 20 NM.
&&
32Hazardous weather outlook, May 10, 5:47 PM CDT, 10 hours 21 minutes before
HAZARDOUS WEATHER OUTLOOK NATIONAL WEATHER SERVICE NEW ORLEANS LA 547 PM CDT THU MAY 10 2012 GMZ530-532-534-536-538-550-552-555-557-570-572-575-577-LAZ034>037- 039-040-046>050-056>072-MSZ068>071-077-080>082-112300- LAKE PONTCHARTRAIN AND LAKE MAUREPAS-MISSISSIPPI SOUND- LAKE BORGNE-CHANDELEUR SOUND-BRETON SOUND- COASTAL WATERS FROM PORT FOURCHON TO LOWER ATCHAFALAYA RIVER OUT 20 NM- COASTAL WATERS FROM THE SOUTHWEST PASS OF THE MISSISSIPPI RIVER TO PORT FOURCHON OUT 20 NM- COASTAL WATERS FROM BOOTHVILLE LA TO THE SOUTHWEST PASS OF THE MISSISSIPPI RIVER OUT 20 NM- COASTAL WATERS FROM PASCAGOULA MS TO STAKE ISLAND LA OUT 20 NM- COASTAL WATERS FROM PORT FOURCHON TO LOWER ATCHAFALAYA RIVER FROM 20 TO 60 NM- COASTAL WATERS FROM THE SOUTHWEST PASS OF THE MISSISSIPPI RIVER TO PORT FOURCHON FROM 20 TO 60 NM- COASTAL WATERS FROM STAKE ISLAND LA TO THE SOUTHWEST PASS OF THE MISSISSIPPI RIVER FROM 20 TO 60 NM- COASTAL WATERS FROM PASCAGOULA MS TO STAKE ISLAND LA FROM 20 TO 60 NM-POINTE COUPEE-WEST FELICIANA-EAST FELICIANA-ST. HELENA- WASHINGTON-ST. TAMMANY-IBERVILLE-WEST BATON ROUGE- EAST BATON ROUGE-ASCENSION-LIVINGSTON-ASSUMPTION-ST. JAMES- ST. JOHN THE BAPTIST-UPPER LAFOURCHE-ST. CHARLES-UPPER JEFFERSON- ORLEANS-UPPER PLAQUEMINES-UPPER ST. BERNARD-UPPER TERREBONNE- LOWER TERREBONNE-LOWER LAFOURCHE-LOWER JEFFERSON- LOWER PLAQUEMINES-LOWER ST. BERNARD-NORTHERN TANGIPAHOA- SOUTHERN TANGIPAHOA-WILKINSON-AMITE-PIKE-WALTHALL-PEARL RIVER- HANCOCK-HARRISON-JACKSON- 547 PM CDT THU MAY 10 2012 THIS HAZARDOUS WEATHER OUTLOOK IS FOR PORTIONS OF SOUTHEAST LOUISIANA...SOUTH MISSISSIPPI AND THE ADJACENT COASTAL WATERS. .DAY ONE...TONIGHT HAZARDOUS WEATHER IS NOT EXPECTED. .DAYS TWO THROUGH SEVEN...FRIDAY THROUGH WEDNESDAY A SLOW MOVING LOW PRESSURE SYSTEM WILL AFFECT THE AREA BEGINNING LATE FRIDAY AND CONTINUING INTO SUNDAY. HEAVY RAINFALL WILL BE THE PRIMARY THREAT FROM THIS SYSTEM...WITH THE HEAVIEST RAINS EXPECTED ON SATURDAY. THE HEAVY RAINFALL COULD RESULT IN LOCALIZED FLOODING ISSUES...ESPECIALLY IN LOW LYING AND POOR DRAINAGE AREAS. A FEW STRONG THUNDERSTORMS MAY ALSO DEVELOP FRIDAY NIGHT INTO SATURDAY. THESE STORMS COULD PRODUCE FREQUENT LIGHTNING STRIKES AND GUSTY WINDS. SCATTERED LATE MORNING AND AFTERNOON THUNDERSTORMS WILL BE POSSIBLE MONDAY THROUGH WEDNESDAY. THESE THUNDERSTORMS COULD PRODUCE LOCALLY HEAVY DOWNPOURS...GUSTY WINDS...AND FREQUENT LIGHTNING. .SPOTTER INFORMATION STATEMENT... SPOTTER ACTIVATION MAY BE REQUIRED ON SATURDAY DUE TO THE HEAVY RAINFALL AND FLOODING THREAT.
The office that day
Everything else NWS New Orleans, LA issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| May 11, 3:42 AM CDT | Small Craft Advisory | LIX | 18 hr | |
| May 11, 10:08 AM CDT | Special Marine Warning | LIX | 2 hr | |
| May 11, 12:07 PM CDT | Special Marine Warning | LIX | 2 hr | |
| May 11, 1:56 PM CDT | Special Marine Warning | LIX | 64 min |
Nearby
Flash Flood Watches in Louisiana, 2012Flash Flood Watches in Mississippi, 2012Every flash flood watch 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; the sounding from the Mesonet's radiosonde archive.