Alert archive / Louisiana / Special Weather Statements in 2021

Special Weather Statement, NWS New Orleans, LA

May 10, 2021East Baton Rouge Parish, West Baton Rouge Parish, Louisiana

NWS New Orleans, LA issued this special weather statement at May 10, 2021, 6:04 AM CDT for East Baton Rouge Parish, West Baton Rouge Parish, Louisiana. It was in force for 56 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: May 10, 2021, 6:04 AM CDT (11:04 UTC)
Expired: May 10, 2021, 7:00 AM CDT
In force: 56 min
Issued by: NWS New Orleans, LA

Counties East Baton Rouge Parish, LA, West Baton Rouge Parish, LA

The nearest sounding before it

Lake Charles Mun, LA (KLCH), launched 00:00Z, 11.1 hours before the alert went out and 165 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: 1849 J/kg
Mixed-layer CIN: -2 J/kg
Mixed-layer LCL: 683 m above ground
0-6 km bulk shear: 30 kt
0-1 km storm-relative helicity: 128 m²/s²
0-3 km storm-relative helicity: 96 m²/s²
Significant tornado parameter: 1.2
Supercell composite: 6.9

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 May 10, 4:32 AM CDT, 1 hour 32 minutes earlier.

Area forecast discussion, May 10, 4:32 AM CDT, 1 hour 32 minutes before

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In the hours before

Local storm report, May 10, 3:37 AM CDT, 2 hours 27 minutes before

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Local storm report, May 10, 3:58 AM CDT, 2 hours 6 minutes before

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Local storm report, May 10, 4:16 AM CDT, 1 hour 48 minutes before

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Local storm report, May 10, 5:35 AM CDT, 29 minutes before

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Special weather statement, May 10, 5:38 AM CDT, 26 minutes before

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Special weather statement, May 10, 6:04 AM CDT, 0 minutes before

Special Weather Statement
National Weather Service New Orleans LA
604 AM CDT Mon May 10 2021

LAZ034-046>049-101200-
Iberville-Ascension-Pointe Coupee-West Baton Rouge-East Baton Rouge-
604 AM CDT Mon May 10 2021

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

At 604 AM CDT, a strong thunderstorm was located near Ramah, or 14
miles southeast of Krotz Springs, moving east at 35 mph.

Winds in excess of 40 mph and penny size hail are possible with this
storm.

Locations impacted include...
Baton Rouge, Plaquemine, Port Allen, Oak Hills Place, St. Gabriel,
Addis, Brusly, Maringouin, Rosedale, Grosse Tete, Westminster, Old
Jefferson, Merrydale, Erwinville, Inniswold, Ramah, Village St.
George, Shenandoah, Gardere and Brownfields.

This includes the following Interstates...
 Interstate 10 in Louisiana between mile markers 127 and 171.
 Interstate 12 between mile markers 1 and 8.
 Interstate 110 in Louisiana between mile markers 1 and 8.

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.

This storm 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 3051 9164 3057 9100 3026 9099 3033 9163
      3035 9163 3036 9164 3038 9164 3038 9163
      3041 9163 3043 9164
TIME...MOT...LOC 1104Z 268DEG 31KT 3043 9155

The office that day

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

Issued	Product	Office	Counties	Lasted
May 9, 8:48 PM CDT	Flash Flood Watch	LIX	Assumption, East Baton Rouge, East Feliciana, Iberville, Orleans, Pointe Coupee and 9 more	15 hr
May 10, 1:00 AM CDT	Special Weather Statement	LIX	Ascension, Livingston	60 min
May 10, 1:29 AM CDT	Areal Flood Advisory	LIX	Ascension, Assumption, Iberville, Saint James	70 min
May 10, 1:49 AM CDT	Special Weather Statement	LIX	Assumption, Saint James, Saint John the Baptist	56 min
May 10, 1:54 AM CDT	Severe Thunderstorm Warning	LIX	Ascension, Assumption, Saint James	51 min
May 10, 2:01 AM CDT	Special Marine Warning	LIX		59 min
May 10, 2:43 AM CDT	Areal Flood Advisory	LIX	Jefferson, Orleans, Plaquemines, Saint Bernard, Saint Charles	2 hr
May 10, 2:52 AM CDT	Special Marine Warning	LIX		53 min
May 10, 2:57 AM CDT	Flash Flood Warning	LIX	Jefferson, Orleans, Saint Charles	9 hr
May 10, 3:25 AM CDT	Special Weather Statement	LIX	Orleans	35 min
May 10, 3:37 AM CDT	Special Marine Warning	LIX		113 min
May 10, 3:41 AM CDT	Tornado Warning	LIX	Orleans, Plaquemines, Saint Bernard	18 min
May 10, 4:20 AM CDT	Flash Flood Warning	LIX	Jefferson, Orleans, Plaquemines, Saint Bernard	115 min
May 10, 5:26 AM CDT	Special Marine Warning	LIX		64 min
May 10, 5:29 AM CDT	Special Marine Warning	LIX		2 hr
May 10, 5:38 AM CDT	Special Weather Statement	LIX	West Baton Rouge	67 min
May 10, 6:16 AM CDT	Special Weather Statement	LIX	Saint Charles	44 min
May 10, 6:36 AM CDT	Special Marine Warning	LIX		54 min
May 10, 7:25 AM CDT	Special Weather Statement	LIX	Saint John the Baptist	50 min
May 10, 7:34 AM CDT	Special Marine Warning	LIX		56 min
May 10, 7:51 AM CDT	Severe Thunderstorm Warning	LIX	Iberville, Pointe Coupee, West Baton Rouge	54 min
May 10, 8:23 AM CDT	Special Marine Warning	LIX		67 min
May 10, 8:28 AM CDT	Severe Thunderstorm Warning	LIX	Ascension, East Baton Rouge, Iberville, Livingston, Pointe Coupee, West Baton Rouge	62 min
May 10, 9:16 AM CDT	Severe Thunderstorm Warning	LIX	Ascension, Assumption, East Baton Rouge, Iberville, Livingston, Saint James and 2 more	44 min
May 10, 9:38 AM CDT	Tornado Warning	LIX	Ascension, Livingston, Saint James, Saint John the Baptist	20 min
May 10, 9:57 AM CDT	Special Weather Statement	LIX	Assumption, Orleans, Saint Charles, Saint James, Saint John the Baptist, Saint Tammany	63 min
May 10, 10:29 AM CDT	Special Marine Warning	LIX		61 min
May 10, 11:08 AM CDT	Special Weather Statement	LIX	Orleans	52 min
May 10, 11:17 AM CDT	Special Marine Warning	LIX		58 min
May 10, 12:10 PM CDT	Special Marine Warning	LIX		65 min
May 10, 12:14 PM CDT	Special Marine Warning	LIX		91 min
May 10, 1:08 PM CDT	Special Marine Warning	LIX		67 min
May 10, 1:44 PM CDT	Special Marine Warning	LIX		28 min
May 10, 2:09 PM CDT	Special Marine Warning	LIX		66 min
May 10, 3:09 PM CDT	Special Marine Warning	LIX		96 min
May 10, 4:05 AM CDT	Severe Thunderstorm Warning	LIX	Hancock	25 min
May 10, 6:06 AM CDT	Special Weather Statement	LIX	Wilkinson	54 min

Nearby

Special Weather Statements in Louisiana, 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.