Alert archive / Mississippi / Special Weather Statements in 2018

Special Weather Statement, NWS New Orleans, LA

August 9, 2018Pearl River County, Mississippi

NWS New Orleans, LA issued this special weather statement at Aug 9, 2018, 4:46 PM CDT for Pearl River County, Mississippi. It was in force for 29 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: Aug 9, 2018, 4:46 PM CDT (21:46 UTC)
Expired: Aug 9, 2018, 5:15 PM CDT
In force: 29 min
Issued by: NWS New Orleans, LA

County Pearl River County, MS

The nearest sounding before it

Slidell Radar S, LA (KSIL), launched 12:00Z, 9.8 hours before the alert went out and 64 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: 1121 J/kg
Mixed-layer CIN: -30 J/kg
Mixed-layer LCL: 964 m above ground
0-6 km bulk shear: 2 kt
0-1 km storm-relative helicity: -79 m²/s²
0-3 km storm-relative helicity: -51 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

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 Aug 9, 4:29 PM CDT, 17 minutes earlier.

Area forecast discussion, Aug 9, 4:29 PM CDT, 17 minutes before

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Hazardous weather outlook, Aug 9, 12:35 PM CDT, 4 hours 11 minutes before

Hazardous Weather Outlook
National Weather Service New Orleans LA
1235 PM CDT Thu Aug 9 2018

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>082-100545-
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-
1235 PM CDT Thu Aug 9 2018

This Hazardous Weather Outlook is for portions of Southeast
Louisiana...South Mississippi and the adjacent coastal waters.

.DAY ONE...This Afternoon and Tonight

Scattered thunderstorms through this afternoon will be capable of
producing gusty winds 20 to 30 mph, occasional lightning and
brief heavy rainfall.

.DAYS TWO THROUGH SEVEN...Friday through Wednesday

Scattered to numerous thunderstorms will be more prone to heavy
rainfall that may lead to localized flooding Friday through
Sunday. Storms will also produce gusty winds and frequent
lightning, along with tropical funnels and waterspouts in marine
areas.

Thunderstorm coverage becomes more typical summer time scattered
in the afternoon hours Monday through Wednesday.

.SPOTTER INFORMATION STATEMENT...

Spotter activation is not anticipated.

In the hours before

Special weather statement, Aug 9, 2:05 PM CDT, 2 hours 41 minutes before

Special Weather Statement
National Weather Service New Orleans LA
205 PM CDT THU AUG 9 2018

LAZ057>059-065-091945-
Upper Terrebonne-St. John The Baptist-Upper Lafourche-St. James-
205 PM CDT THU AUG 9 2018

...A LINE OF STRONG THUNDERSTORMS WILL AFFECT SOUTHWESTERN ST. JOHN
THE BAPTIST...SOUTHEASTERN ST. JAMES...NORTH CENTRAL TERREBONNE AND
NORTHWESTERN LAFOURCHE PARISHES...

At 205 PM CDT, radar indicated strong thunderstorms were located
along a line extending from Thibodaux to near Schriever. Movement was
northeast at 15 mph.

Winds in excess of 40 mph are possible with these storms.

Locations impacted include...
Thibodaux, Reserve, Schriever, Gray, Edgard, South Vacherie,
Chackbay, Raceland and Killona.

Frequent cloud to ground lightning is occurring with this storm.
Lightning can strike 10 miles away from a thunderstorm. Seek a safe
shelter inside a building or vehicle.

LAT...LON 2961 9095 2984 9088 3007 9051 3002 9052
      3000 9055 2996 9054 2970 9062
TIME...MOT...LOC 1905Z 243DEG 11KT 2981 9084 2972 9086

TD

Special weather statement, Aug 9, 2:07 PM CDT, 2 hours 39 minutes before

Special Weather Statement
National Weather Service New Orleans LA
207 PM CDT THU AUG 9 2018

LAZ057>060-091945-
St. Charles-St. John The Baptist-Upper Lafourche-St. James-
207 PM CDT THU AUG 9 2018

...A STRONG THUNDERSTORM WILL AFFECT SOUTHWESTERN ST. JOHN THE
BAPTIST...SOUTHEASTERN ST. JAMES...NORTHWESTERN ST. CHARLES AND NORTH
CENTRAL LAFOURCHE PARISHES...

At 207 PM CDT, a strong thunderstorm was located near South Vacherie,
or 13 miles southwest of Hahnville, moving northeast at 10 mph.

Winds in excess of 40 mph are possible with this storm.

Locations impacted include...
Hahnville, Laplace, Reserve, Killona, Norco, Paradis, Des Allemands,
Montz, Edgard, Luling, Boutte, Destrehan, Taft, New Sarpy, South
Vacherie and Bayou Gauche.

Frequent cloud to ground lightning is occurring with this storm.
Lightning can strike 10 miles away from a thunderstorm. Seek a safe
shelter inside a building or vehicle.

LAT...LON 2979 9060 2995 9071 3010 9044 2986 9031
TIME...MOT...LOC 1907Z 244DEG 11KT 2988 9062

TD

Special weather statement, Aug 9, 2:10 PM CDT, 2 hours 36 minutes before

Special Weather Statement
National Weather Service New Orleans LA
210 PM CDT THU AUG 9 2018

LAZ034-046-047-092000-
Iberville-Pointe Coupee-West Baton Rouge-
210 PM CDT THU AUG 9 2018

...A STRONG THUNDERSTORM WILL AFFECT SOUTHWESTERN WEST BATON ROUGE...
SOUTH CENTRAL POINTE COUPEE AND NORTHWESTERN IBERVILLE PARISHES...

At 209 PM CDT, a strong thunderstorm was located over Interstate 10
near Atchafalaya National Wildlife Refuge, or 11 miles northeast of
Catahoula, moving northeast at 15 mph.

Winds in excess of 40 mph are possible with this storm.

Locations impacted include...
Maringouin, Rosedale, Grosse Tete, Ramah and Erwinville.

Frequent cloud to ground lightning is occurring with this storm.
Lightning can strike 10 miles away from a thunderstorm. Seek a safe
shelter inside a building or vehicle.

LAT...LON 3059 9143 3034 9130 3026 9159 3028 9159
      3032 9163 3035 9163 3036 9164 3037 9164
      3038 9163 3041 9163 3046 9165
TIME...MOT...LOC 1909Z 244DEG 11KT 3036 9161

TD

Special weather statement, Aug 9, 2:20 PM CDT, 2 hours 26 minutes before

Special Weather Statement
National Weather Service New Orleans LA
220 PM CDT THU AUG 9 2018

LAZ040-071-072-092000-
Northern Tangipahoa LA-Southern Tangipahoa LA-St. Tammany LA-
220 PM CDT THU AUG 9 2018

...SPECIAL WEATHER STATEMENT...

At 220 PM CDT, Doppler radar was tracking a strong thunderstorm near
Robert, or near Hammond, moving northeast at 10 mph.

Winds in excess of 30 mph will be possible with this storm.

Locations impacted include...
Hammond, Folsom, Natalbany, Robert and Tickfaw.

LAT...LON 3064 9015 3053 9023 3044 9032 3052 9050
      3075 9043
TIME...MOT...LOC 1920Z 205DEG 8KT 3051 9040

Special weather statement, Aug 9, 4:46 PM CDT, 0 minutes before

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The office that day

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

Issued	Product	Office	Counties	Lasted
Aug 9, 1:16 PM CDT	Special Marine Warning	LIX		44 min
Aug 9, 2:05 PM CDT	Special Weather Statement	LIX	Saint James	40 min
Aug 9, 2:07 PM CDT	Special Weather Statement	LIX	Saint Charles	38 min
Aug 9, 2:10 PM CDT	Special Weather Statement	LIX	West Baton Rouge	50 min
Aug 9, 2:20 PM CDT	Special Weather Statement	LIX	Tangipahoa	40 min
Aug 8, 7:14 PM CDT	Special Weather Statement	LIX	Amite	31 min

Nearby

Special Weather Statements in Mississippi, 2018 Every special weather statement in 2018

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.