Alert archive / Mississippi / Special Weather Statements in 2021

Special Weather Statement, NWS New Orleans, LA

July 13, 2021Amite County, Mississippi

NWS New Orleans, LA issued this special weather statement at Jul 13, 2021, 6:34 PM CDT for Amite County, Mississippi. It was in force for 41 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: Jul 13, 2021, 6:34 PM CDT (23:34 UTC)
Expired: Jul 13, 2021, 7:15 PM CDT
In force: 41 min
Issued by: NWS New Orleans, LA

County Amite County, MS

The nearest sounding before it

Jackson, MS (KJAN), launched 12:00Z, 11.6 hours before the alert went out and 142 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: 219 J/kg
Mixed-layer CIN: -71 J/kg
Mixed-layer LCL: 968 m above ground
0-6 km bulk shear: 8 kt
0-1 km storm-relative helicity: 68 m²/s²
0-3 km storm-relative helicity: 63 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 Jul 13, 4:13 PM CDT, 2 hours 21 minutes earlier.

Area forecast discussion, Jul 13, 4:13 PM CDT, 2 hours 21 minutes before

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In the hours before

Special weather statement, Jul 13, 2:11 PM CDT, 4 hours 23 minutes before

Special Weather Statement
National Weather Service New Orleans LA
211 PM CDT Tue Jul 13 2021

LAZ049-057-131945-
Ascension-St. James-
211 PM CDT Tue Jul 13 2021

...A STRONG THUNDERSTORM WILL AFFECT CENTRAL ASCENSION AND
NORTHWESTERN ST. JAMES PARISHES...

At 210 PM CDT, a strong thunderstorm was located over Sorrento, or
near Gonzales, moving northwest at 10 mph.

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

Locations impacted include...
Gonzales and Sorrento.

This includes Interstate 10 in Louisiana between mile markers 177 and
191.

If outdoors, consider seeking shelter inside a building.

LAT...LON 3021 9102 3028 9082 3028 9079 3013 9074
      3007 9088
TIME...MOT...LOC 1910Z 151DEG 7KT 3016 9087

BL

Special weather statement, Jul 13, 2:21 PM CDT, 4 hours 13 minutes before

Special Weather Statement
National Weather Service New Orleans LA
221 PM CDT Tue Jul 13 2021

LAZ047-048-131945-
West Baton Rouge-East Baton Rouge-
221 PM CDT Tue Jul 13 2021

...A STRONG THUNDERSTORM WILL AFFECT EAST CENTRAL WEST BATON ROUGE
AND CENTRAL EAST BATON ROUGE PARISHES...

At 221 PM CDT, a strong thunderstorm was located over Baton Rouge,
moving northwest at 10 mph.

Wind gusts up to 50 mph are possible with this storm.

Locations impacted include...
Baton Rouge, Baker, Port Allen, Westminster, Merrydale, Inniswold,
Brownfields, Shenandoah and Baton Rouge Airport.

This includes the following Interstates...
 Interstate 10 in Louisiana between mile markers 152 and 162.
 Interstate 12 between mile markers 1 and 7.
 Interstate 110 in Louisiana between mile markers 1 and 8.

If outdoors, consider seeking shelter inside a building.

LAT...LON 3041 9101 3037 9119 3054 9132 3061 9104
TIME...MOT...LOC 1921Z 151DEG 7KT 3046 9115

BL

Special weather statement, Jul 13, 2:24 PM CDT, 4 hours 10 minutes before

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Special weather statement, Jul 13, 3:00 PM CDT, 3 hours 34 minutes before

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Special weather statement, Jul 13, 3:30 PM CDT, 3 hours 4 minutes before

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Special weather statement, Jul 13, 6:34 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
Jul 12, 7:49 PM CDT	Special Weather Statement	LIX	Pointe Coupee	56 min
Jul 12, 8:13 PM CDT	Special Weather Statement	LIX	West Feliciana	62 min
Jul 12, 9:13 PM CDT	Special Weather Statement	LIX	East Baton Rouge, West Baton Rouge	62 min
Jul 13, 9:35 AM CDT	River Flood Warning	LIX	Saint Tammany	50 hr
Jul 13, 1:58 PM CDT	Special Weather Statement	LIX	Saint James	32 min
Jul 13, 2:11 PM CDT	Special Weather Statement	LIX	Ascension	34 min
Jul 13, 2:21 PM CDT	Special Weather Statement	LIX	East Baton Rouge	24 min
Jul 13, 2:24 PM CDT	Special Weather Statement	LIX	Assumption	36 min
Jul 13, 3:00 PM CDT	Special Weather Statement	LIX	Ascension	30 min
Jul 13, 3:30 PM CDT	Special Weather Statement	LIX	East Baton Rouge, West Baton Rouge	30 min

Nearby

Special Weather Statements in Mississippi, 2021 Every special weather statement in 2021

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.