Alert archive / Louisiana / Flash Flood Watches in 2016
Flash Flood Watch 1, NWS New Orleans, LA
NWS New Orleans, LA issued this flash flood watch at Mar 9, 2016, 3:28 AM CST for 13 parishes in Louisiana; 5 counties in Mississippi. It took effect at Mar 10, 2016, 6:00 AM CST. It was in force for 60 hr.
The area
The counties it named.
The facts
- Issued
- Mar 9, 2016, 3:28 AM CST (09:28 UTC)
- In effect from
- Mar 10, 2016, 6:00 AM CST
- Expired
- Mar 12, 2016, 6:00 PM CST
- In force
- 60 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, Pike County, MS, Walthall County, MS, Wilkinson County, MS
The nearest sounding before it
Jackson, MS (KJAN), launched 00:00Z, 9.5 hours before the alert went out and 198 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
- 1163 m above ground
- 0-6 km bulk shear
- 41 kt
- 0-1 km storm-relative helicity
- 85 m²/s²
- 0-3 km storm-relative helicity
- 179 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
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 Mar 8, 11:38 PM CST, 3 hours 50 minutes earlier.
Area forecast discussion, Mar 8, 11:38 PM CST, 3 hours 50 minutes before
AREA FORECAST DISSCUSSION
NATIONAL WEATHER SERVICE NEW ORLEANS LA
1138 PM CST TUE MAR 8 2016
.AVIATION...
...06Z TAF ISSUANCE...
CLOUD COVER AND STRONG SOUTHEAST WINDS WILL IMPEDE FOG
DEVELOPMENT THROUGH THURSDAY MORNING. CEILINGS WILL REMAIN IN THE
MVFR RANGE. ISOLATED RAIN SHOWERS MAY AFFECT KMCB AND KBTR
12Z...THEN TEMPO TO PREVAILING SHRA AFTER 18Z FOR MOST SITES
EXCEPT KGPT. PREVAIL SHRA WILL AFFECT SITES AFTER 00Z THURSDAY. 18
&&
.LIX WATCHES/WARNINGS/ADVISORIES...
LA...COASTAL FLOOD ADVISORY UNTIL 6 PM CST THURSDAY FOR LAZ040-049-
050-057-058-060>064-066>070-072.
GM...GALE WATCH FROM WEDNESDAY EVENING THROUGH LATE WEDNESDAY NIGHT
FOR GMZ550-552-555-557-570-572-575-577.
SMALL CRAFT ADVISORY UNTIL 6 PM CST WEDNESDAY FOR GMZ530-532-534-
536-538-550-552-555-557-570-572-575-577.
MS...COASTAL FLOOD ADVISORY UNTIL 6 PM CST THURSDAY FOR MSZ080>082.
GM...GALE WATCH FROM WEDNESDAY EVENING THROUGH LATE WEDNESDAY NIGHT
FOR GMZ552-555-557-570-572-575-577.
SMALL CRAFT ADVISORY UNTIL 6 PM CST WEDNESDAY FOR GMZ532-534-536-
538-550-552-555-557-570-572-575-577.
&&Hazardous weather outlook, Mar 8, 12:49 PM CST, 14 hours 39 minutes before
HAZARDOUS WEATHER OUTLOOK NATIONAL WEATHER SERVICE NEW ORLEANS LA 1249 PM CST TUE MAR 8 2016 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>082-090700- LAKE PONTCHARTRAIN AND LAKE MAUREPAS-MISSISSIPPI SOUND- LAKE BORGNE-CHANDELEUR SOUND-BRETON SOUND- COASTAL WATERS FROM PORT FOURCHON LA TO LOWER ATCHAFALAYA RIVER LA OUT 20 NM- COASTAL WATERS FROM THE SOUTHWEST PASS OF THE MISSISSIPPI RIVER TO PORT FOURCHON LOUISIANA OUT 20 NM- COASTAL WATERS FROM BOOTHVILLE LA TO SOUTHWEST PASS OF THE MISSISSIPPI RIVER OUT 20 NM- COASTAL WATERS FROM PASCAGOULA MISSISSIPPI TO STAKE ISLAND OUT 20 NM- COASTAL WATERS FROM PORT FOURCHON LOUISIANA TO LOWER ATCHAFALAYA RIVER LA FROM 20 TO 60 NM- COASTAL WATERS FROM SOUTHWEST PASS OF THE MISSISSIPPI RIVER TO PORT FOURCHON LOUISIANA FROM 20 TO 60 NM- COASTAL WATERS FROM STAKE ISLAND LA TO SOUTHWEST PASS OF THE MISSISSIPPI RIVER FROM 20 TO 60 NM- COASTAL WATERS FROM PASCAGOULA MISSISSIPPI TO STAKE ISLAND LOUISIANA OUT 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- 1249 PM CST TUE MAR 8 2016 THIS HAZARDOUS WEATHER OUTLOOK IS FOR PORTIONS OF SOUTHEAST LOUISIANA...SOUTH MISSISSIPPI AND THE ADJACENT COASTAL WATERS. .DAY ONE...THIS AFTERNOON AND TONIGHT. SEVERE WEATHER IS NOT EXPECTED TODAY BUT A FEW STRONG THUNDERSTORMS PRODUDING WINDS OF 35 TO 40 MPH THIS AFTERNOON COULD OCCUR ALONG AND WEST OF A LINE FROM BATON ROUGE TO HOUMA. .DAYS TWO THROUGH SEVEN...WEDNESDAY THROUGH MONDAY. A LARGE STORM SYSTEM WILL BRING MULTIPLE BOUTS OF HEAVY RAIN TO THE AREA DURING THE MID AND LATTER PART OF THIS WEEK. THE MAJOR CONCERNS WILL BEGIN WITH THE HEAVIEST RAINFALL EXPECTED TO MOVE INTO THE AREA WEDNESDAY THROUGH FRIDAY. OVERALL WIDESPREAD 4 TO 6 INCHES OF RAIN ARE ANTICIPATED WITH LOCALLY HIGHER AMOUNTS APPROACHING AND POSSIBLY EVEN EXCEEDING 8 INCHES. RAINFALL OF THIS MAGNITUDE IN A SHORT TIME WOULD RESULT IN FLASH FLOODING AND RISING RIVERS. SMALL CRAFT ADVISORIES WILL REMAIN THROUGH WEDNESDAY. AS WINDS STRENGTHENS FURTHER...FREQUENT GUSTS TO GALE FORCE MAY REQUIRE A GALE WATCH WEDNESDAY NIGHT AND THURSDAY. A COASTAL FLOOD ADVISORY HAS BEEN ISSUED AS WATER LEVELS ARE EXPECTED TO BE AS MUCH AS 2 FEET ABOVE NORMAL AT TIMES OF HIGH TIDE. GENERAL TIMES OF GREATEST IMAPACTS WILL BE EARLY WEDNESDAY MORNING AND AGAIN FROM LATE WEDNESDAY NIGHT THROUGH THURSDAY. A MARGINAL RISK OF SEVERE THUNDERSTORMS WILL EXIST WEDNESDAY AND THURSDAY. MAIN CONCERNS WILL BE DAMAGING WINDS AND THE POSSIBILITY OF AN ISOLATED TORNADO. .SPOTTER INFORMATION STATEMENT... SPOTTER ACTIVATION IS NOT ANTICIPATED.
The office that day
Everything else NWS New Orleans, LA issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Mar 9, 3:15 AM CST | Wind Advisory | LIX | Assumption, East Baton Rouge, Iberville, Saint Bernard, Saint James, Saint John the Baptist and 1 more | 39 hr |
| Mar 9, 3:36 AM CST | Gale Warning | LIX | 26 hr | |
| Mar 9, 3:36 AM CST | Small Craft Advisory | LIX | 55 hr |
Nearby
Flash Flood Watches in Louisiana, 2016Flash Flood Watches in Mississippi, 2016Every flash flood watch in 2016
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.