Alert archive / Louisiana / Special Weather Statements in 2016

Special Weather Statement, NWS New Orleans, LA

March 31, 20164 parishes in Louisiana; Amite County, Wilkinson County, Mississippi

NWS New Orleans, LA issued this special weather statement at Mar 31, 2016, 2:05 AM CDT for 4 parishes in Louisiana; Amite County, Wilkinson County, Mississippi. It was in force for 55 min. No storm report in the archive falls inside the area while it was in force.

The area

The outline as issued.

The facts

Issued: Mar 31, 2016, 2:05 AM CDT (07:05 UTC)
Expired: Mar 31, 2016, 3:00 AM CDT
In force: 55 min
Issued by: NWS New Orleans, LA

Counties East Feliciana Parish, LA, Pointe Coupee Parish, LA, Saint Helena Parish, LA, West Feliciana Parish, LA, Amite County, MS, Wilkinson County, MS

The nearest sounding before it

Slidell Radar S, LA (KSIL), launched 00:00Z, 7.1 hours before the alert went out and 179 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-p

Temperature in red, dew point in green, the mixed-layer parcel dashed.

Hodograph

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: 401 J/kg
Mixed-layer CIN: -53 J/kg
Mixed-layer LCL: 689 m above ground
0-6 km bulk shear: 30 kt
0-1 km storm-relative helicity: 270 m²/s²
0-3 km storm-relative helicity: 356 m²/s²
Significant tornado parameter: 0.5
Supercell composite: 5.6

Open this sounding in Storm Lab

The text

As transmitted.

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What forecasters said that day

The local office's own words before this special weather statement 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 special weather statement went out at Mar 31, 12:28 AM CDT, 1 hour 37 minutes earlier.

Area forecast discussion, Mar 31, 12:28 AM CDT, 1 hour 37 minutes before

AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE NEW ORLEANS LA
1228 AM CDT THU MAR 31 2016

.AVIATION...

PREVAILING MVFR AND IFR CEILINGS RANGING FROM 800 TO 1500 FEET
WILL BE THE RULE AT ALL OF THE TERMINALS THROUGH 00Z. AFTER
00Z...SOME LOWER STRATUS MAY BE POSSIBLE AS A SHIELD OF
PRECIPITATION ON THE BACK SIDE OF A FRONT BEGINS TO DEVELOP.
CEILINGS COULD FALL TO AROUND 300 TO 500 BY 03Z AND THEN PERSIST
THROUGH THE OVERNIGHT HOURS. THROUGH 00Z...PRECIPITATION WILL TEND
TO BE MORE SCATTERED IN NATURE...ALTHOUGH ONE BAND OF SHOWERS AND
THUNDERSTORMS CURRENTLY APPROACHING KBTR SHOULD IMPACT KHDC AND
KMCB BEFORE 12Z. AFTER 12Z...HAVE WENT WITH VCTS WORDING FOR AREAS
WHERE POPS ARE GREATER THAN 50 PERCENT. OTHERWISE...THE TIMING OF
CONVECTION IS TOO HARD TO PINPOINT. IF CONVECTION LOOKS TO DEVELOP
NEAR A TERMINAL...AMENDMENTS CAN COVER THE SHORT-LIVED CONVECTIVE
THREATS. 32

&&

.PRELIMINARY POINT TEMPS/POPS...
MCB  78  63  73  50 /  60  60  70  50
BTR  82  66  74  52 /  50  70  80  40
ASD  80  68  75  55 /  50  80  90  60
MSY  82  69  75  58 /  60  80 100  50
GPT  78  70  76  55 /  60  80 100  70
PQL  80  69  76  54 /  50  80 100  70

&&

.LIX WATCHES/WARNINGS/ADVISORIES...
LA...FLASH FLOOD WATCH FROM LATE TONIGHT THROUGH FRIDAY EVENING FOR
     LAZ056>070.

     FLASH FLOOD WATCH FROM 4 AM CDT EARLY THIS MORNING THROUGH
     FRIDAY EVENING FOR LAZ034>037-039-040-046>050-071-072.

GM...SMALL CRAFT ADVISORY UNTIL 5 PM CDT THIS AFTERNOON FOR GMZ536-
     538-550-552-555-557-570-572-575-577.

MS...FLASH FLOOD WATCH FROM LATE TONIGHT THROUGH FRIDAY EVENING FOR
     MSZ080>082.

     FLASH FLOOD WATCH FROM 4 AM CDT EARLY THIS MORNING THROUGH
     FRIDAY EVENING FOR MSZ068>071-077.

GM...SMALL CRAFT ADVISORY UNTIL 5 PM CDT THIS AFTERNOON FOR GMZ538-
     550-552-555-557-570-572-575-577.

&&

Hazardous weather outlook, Mar 30, 6:10 PM CDT, 7 hours 55 minutes before

HAZARDOUS WEATHER OUTLOOK
NATIONAL WEATHER SERVICE NEW ORLEANS LA
610 PM CDT WED MAR 30 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>082-311115-
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-
610 PM CDT WED MAR 30 2016

THIS HAZARDOUS WEATHER OUTLOOK IS FOR PORTIONS OF SOUTHEAST
LOUISIANA...SOUTH MISSISSIPPI AND THE ADJACENT COASTAL WATERS.

.DAY ONE...TONIGHT

THERE IS A SLIGHT RISK OF SEVERE THUNDERSTORMS FOR AREAS NORTH OF
INTERSTATE 12 IN SOUTHEAST LOUISIANA INCLUDING METRO BATON ROUGE
AND ALL OF SOUTHWEST MISSISSIPPI.

A MARGINAL RISK OF SEVERE THUNDERSTORMS EXISTS ALONG THE
INTERSTATE 10 CORRIDOR INCLUDING METRO NEW ORLEANS AND THE
MISSISSIPPI GULF COAST. THUNDERSTORMS ARE MOST LIKELY FROM LATE
AFTERNOON THROUGH THE OVERNIGHT HOURS. THE PRIMARY THREATS FROM
ANY SEVERE THUNDERSTORMS WILL BE HAIL AND STRONG DAMAGING WIND
GUSTS. A FEW TORNADOES MAY ALSO DEVELOP...WITH THE HIGHEST RISK
ACROSS SOUTHWEST MISSISSIPPI.

SMALL CRAFT ADVISORIES ARE IN EFFECT FOR ALL OF THE OPEN GULF
WATERS AS WELL AS THE CHANDELEUR AND BRETON SOUNDS. STRONG
SOUTHERLY WINDS OF 20 TO 25 KNOTS AND SEAS OF 4 TO 7 FEET CAN BE
EXPECTED.

.DAYS TWO THROUGH SEVEN...THURSDAY THROUGH TUESDAY

A FLASH FLOOD WATCH HAS BEEN ISSUED FOR THE OUTLOOK AREA THURSDAY
THROUGH FRIDAY. A SERIES OF DISTURBANCES WILL MOVE ACROSS THE
AREA EARLY THURSDAY MORNING THROUGH FRIDAY AS A SLOW MOVING COLD
FRONT PROGRESSES SOUTH. THE THREAT WILL BEGIN OVER SOUTHWEST
MISSISSIPPI AND ADJACENT LOUISIANA PARISHES EARLY THURSDAY
MORNING. AS THE FRONT SHIFTS SOUTH THURSDAY...THE THREAT WILL
SPREAD SOUTHWARD AS WELL. GENERALLY WET SOIL FROM RECENT RAINFALL
IN ADDITION TO THE POSSIBILITY OF TRAINING THUNDERSTORMS COULD
LEAD TO FLASH FLOODING. AMOUNTS OF 2 TO 4 INCHES OF RAINFALL WITH
LOCALLY HIGHER AMOUNTS WILL BE POSSIBLE THROUGH FRIDAY.

IN ADDITION...THERE IS A SLIGHT TO ENHANCED RISK OF SEVERE
THUNDERSTORMS FOR AREAS ALONG AND NORTH OF THE INTERSTATE 10
CORRIDOR INCLUDING METRO BATON ROUGE...METRO NEW ORLEANS...AND THE
MISSISSIPPI GULF COAST ON THURSDAY. A MARGINAL RISK OF SEVERE
THUNDERSTORMS EXISTS ACROSS COASTAL SOUTHEAST LOUISIANA.
TORNADOES...LARGE HAIL...AND STRONG DAMAGING WIND GUSTS WILL ALL
BE POSSIBLE THREATS FROM ANY SEVERE THUNDERSTORMS THAT FORM
THURSDAY INTO THURSDAY NIGHT.

A MARGINAL TO SLIGHT RISK OF SEVERE THUNDERSTORMS WILL BE FOUND
ACROSS MOST OF THE AREA ON FRIDAY AS THE COLD FRONT MOVES
THROUGH. TORNADOES...HAIL...AND STRONG DAMAGING WIND GUSTS WILL
STILL BE A CONCERN WITH ANY SEVERE THUNDERSTORMS THAT FORM ON
FRIDAY.

SMALL CRAFT ADVISORY CONDITIONS WILL PERSIST THROUGH THURSDAY IN
ADVANCE OF THE APPROACHING COLD FRONT. STRONG ONSHORE FLOW OF 20
TO 25 KNOTS AND ROUGH SEAS OF 4 TO 7 FEET CAN BE EXPECTED.

ANOTHER ROUND OF SMALL CRAFT ADVISORY CONDITIONS WILL BE POSSIBLE
FRIDAY NIGHT INTO SATURDAY IN THE WAKE OF THE COLD FRONT. STRONG
NORTHERLY FLOW OF 20 TO 25 KNOTS AND SEAS OF 4 TO 7 FEET ARE
FORECAST.

WEATHER CAN CHANGE VERY RAPIDLY. ALWAYS USE THE LATEST
FORECASTS...WATCHES AND WARNINGS FOR PLANNING PURPOSES.

.SPOTTER INFORMATION STATEMENT...

SPOTTER ACTIVATION MAY BE REQUIRED TODAY...TOMORROW...AND FRIDAY
FOR THE ENTIRE AREA DUE TO THREAT OF SEVERE THUNDERSTORMS.

In the hours before

Special weather statement, Mar 31, 2:05 AM CDT, 0 minutes before

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE NEW ORLEANS LA
205 AM CDT THU MAR 31 2016

LAZ034>037-048-MSZ068-069-310800-
WEST FELICIANA-EAST FELICIANA-ST. HELENA-POINTE COUPEE-EAST BATON
ROUGE-AMITE-WILKINSON-
205 AM CDT THU MAR 31 2016

...A LINE OF STRONG THUNDERSTORMS WILL AFFECT WEST FELICIANA...POINTE
COUPEE...CENTRAL ST. HELENA...NORTHERN EAST BATON ROUGE AND EAST
FELICIANA PARISHES...AMITE AND WILKINSON COUNTIES...

AT 204 AM CDT...RADAR INDICATED STRONG THUNDERSTORMS WERE LOCATED
ALONG A LINE EXTENDING FROM NEAR MCCALL CREEK TO NEAR CENTREVILLE TO
PALMETTO. MOVEMENT WAS NORTHEAST AT 50 MPH.

WINDS IN EXCESS OF 30 MPH ARE POSSIBLE WITH THESE STORMS.

LOCATIONS IMPACTED INCLUDE...
ZACHARY...NEW ROADS...JACKSON...ST. FRANCISVILLE...CLINTON...LIBERTY...
GREENSBURG...CENTREVILLE...LIVONIA...WOODVILLE...SLAUGHTER...GLOSTER...
FORDOCHE...MORGANZA...WILSON...NORWOOD...EASLEYVILLE...LOTTIE...FORT ADAMS
AND GILLSBERG.

THESE STORMS MAY INTENSIFY...SO BE CERTAIN TO MONITOR LOCAL RADIO
STATIONS AND AVAILABLE TELEVISION STATIONS FOR ADDITIONAL INFORMATION
AND POSSIBLE WARNINGS FROM THE NATIONAL WEATHER SERVICE.

LAT...LON 3132 9112 3135 9055 3100 9055 3100 9064
      3073 9071 3066 9132 3051 9142 3050 9175
      3067 9173 3086 9182 3098 9180 3102 9168
      3091 9165 3100 9163 3104 9156 3113 9163
      3123 9157 3123 9149 3132 9146 3137 9123
TIME...MOT...LOC 0704Z 244DEG 44KT 3147 9070 3109 9113 3070 9192

24/RR

The office that day

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

Issued	Product	Office	Counties	Lasted
Mar 31, 2:58 AM CDT	Special Weather Statement	LIX	Pointe Coupee, West Baton Rouge	62 min
Mar 31, 4:32 AM CDT	Special Weather Statement	LIX	West Feliciana	28 min
Mar 31, 4:55 AM CDT	Special Weather Statement	LIX	East Feliciana, Saint Helena	35 min
Mar 31, 5:23 AM CDT	Tornado Warning	LIX	East Baton Rouge, East Feliciana, Saint Helena	37 min
Mar 31, 6:02 AM CDT	Tornado Warning	LIX	Tangipahoa	13 min
Mar 31, 6:16 AM CDT	Tornado Warning Tornado observed	LIX	Tangipahoa, Washington	11 min
Mar 31, 6:23 AM CDT	Tornado Warning	LIX	Tangipahoa, Washington	37 min
Mar 31, 9:25 AM CDT	River Flood Warning	LIX	Tangipahoa	4 days
Mar 31, 9:31 AM CDT	River Flood Warning	LIX	Saint Tammany	3 days
Mar 31, 11:18 AM CDT	River Flood Warning	LIX	Saint Tammany	4 days
Mar 31, 2:34 AM CDT	Severe Thunderstorm Warning	LIX	Wilkinson	26 min
Mar 31, 4:26 AM CDT	Special Weather Statement	LIX	Amite, Pike	34 min
Mar 31, 4:57 AM CDT	Special Weather Statement	LIX	Pike	33 min
Mar 31, 7:05 AM CDT	Severe Thunderstorm Warning	LIX	Walthall	25 min
Mar 31, 11:13 AM CDT	River Flood Warning	LIX	Pearl River	70 hr
Mar 31, 11:13 AM CDT	River Flood Warning	LIX	Pearl River	56 hr
Mar 31, 2:14 PM CDT	Special Weather Statement	LIX	Pike	46 min
Mar 31, 2:15 PM CDT	Special Weather Statement	LIX	Wilkinson	60 min
Mar 31, 3:02 PM CDT	Special Weather Statement	LIX	Amite	43 min

Nearby

Special Weather Statements in Louisiana, 2016 Special Weather Statements in Mississippi, 2016 Every special weather statement 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.