Alert archive / Louisiana / Special Weather Statements in 2021

Special Weather Statement, NWS Shreveport, LA

March 16, 2021Bienville Parish, Louisiana

NWS Shreveport, LA issued this special weather statement at Mar 16, 2021, 2:36 AM CDT for Bienville Parish, Louisiana. It was in force for 39 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 16, 2021, 2:36 AM CDT (07:36 UTC)
Expired: Mar 16, 2021, 3:15 AM CDT
In force: 39 min
Issued by: NWS Shreveport, LA

County Bienville Parish, LA

The radar

The Shreveport radar (KSHV), 90 km from the middle of the area, began a volume at 07:35 UTC, the scan nearest the moment this went out.

Open the radar archive at this moment

The archived warnings, watches and discussions in force at that minute are drawn over the scan, this one among them.

The nearest sounding before it

Jackson, MS (KJAN), launched 00:00Z, 7.6 hours before the alert went out and 264 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: 1251 J/kg
Mixed-layer CIN: -9 J/kg
Mixed-layer LCL: 1073 m above ground
0-6 km bulk shear: 53 kt
0-1 km storm-relative helicity: 112 m²/s²
0-3 km storm-relative helicity: 235 m²/s²
Significant tornado parameter: 1.4
Supercell composite: 6.2

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 Shreveport, LA wrote its last area forecast discussion before this special weather statement went out at Mar 16, 12:43 AM CDT, 1 hour 53 minutes earlier.

Area forecast discussion, Mar 16, 12:43 AM CDT, 1 hour 53 minutes before

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Hazardous weather outlook, Mar 15, 11:00 AM CDT, 15 hours 36 minutes before

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In the hours before

Special weather statement, Mar 15, 10:19 PM CDT, 4 hours 17 minutes before

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Special weather statement, Mar 15, 11:51 PM CDT, 2 hours 45 minutes before

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Special weather statement, Mar 16, 12:32 AM CDT, 2 hours 4 minutes before

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Special weather statement, Mar 16, 2:36 AM CDT, 0 minutes before

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The office that day

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

Issued	Product	Office	Counties	Lasted
Mar 15, 10:19 PM CDT	Special Weather Statement	SHV	Nacogdoches	41 min
Mar 16, 12:32 AM CDT	Special Weather Statement	SHV	Shelby	43 min
Mar 15, 11:51 PM CDT	Special Weather Statement	SHV	Union	24 min
Mar 16, 2:08 PM CDT	Special Weather Statement	SHV	LaSalle	52 min
Mar 16, 4:40 PM CDT	Special Weather Statement	SHV	Grant	50 min
Mar 16, 5:30 PM CDT	Special Weather Statement	SHV	LaSalle	45 min
Mar 16, 5:34 PM CDT	Special Weather Statement	SHV	Winn	41 min
Mar 16, 5:44 PM CDT	Special Weather Statement	SHV	Union	46 min
Mar 16, 6:04 PM CDT	Severe Thunderstorm Warning	SHV	Caldwell, Jackson, Ouachita, Winn	31 min
Mar 16, 6:40 PM CDT	Special Weather Statement	SHV	Union	50 min
Mar 16, 3:40 AM CDT	Special Weather Statement	SHV	Union	50 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; radar from the NEXRAD Level II archive.