Alert archive / Louisiana / Special Weather Statements in 2020

Special Weather Statement, NWS Shreveport, LA

January 13, 2020Grant Parish, Winn Parish, Louisiana

NWS Shreveport, LA issued this special weather statement at Jan 13, 2020, 9:21 PM CST for Grant Parish, Winn 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: Jan 13, 2020, 9:21 PM CST (03:21 UTC)
Expired: Jan 13, 2020, 10:00 PM CST
In force: 39 min
Issued by: NWS Shreveport, LA

Counties Grant Parish, LA, Winn Parish, LA

The radar

The Ft Polk radar (KPOE), 46 km from the middle of the area, began a volume at 03:20 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, 3.4 hours before the alert went out and 267 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: 0 J/kg
Mixed-layer CIN: No buoyant parcel
Mixed-layer LCL: 792 m above ground
0-6 km bulk shear: 44 kt
0-1 km storm-relative helicity: 299 m²/s²
0-3 km storm-relative helicity: 316 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 Shreveport, LA wrote its last area forecast discussion before this special weather statement went out at Jan 13, 5:50 PM CST, 3 hours 31 minutes earlier.

Area forecast discussion, Jan 13, 5:50 PM CST, 3 hours 31 minutes before

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Hazardous weather outlook, Jan 13, 12:02 PM CST, 9 hours 19 minutes before

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In the hours before

Special weather statement, Jan 13, 9:21 PM CST, 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
Jan 14, 4:37 AM CST	Dense Fog Advisory	SHV	Bowie, Camp, Cass, Franklin, Morris, Red River and 4 more	5 hr
Jan 14, 4:14 AM CST	Areal Flood Advisory	SHV	Bossier, Caddo, Claiborne, Union, Webster	3 hr
Jan 14, 11:43 AM CST	Special Weather Statement	SHV	LaSalle	47 min
Jan 14, 12:12 PM CST	Flash Flood Warning	SHV	Natchitoches, Sabine	3 hr
Jan 14, 2:57 PM CST	Special Weather Statement	SHV	Natchitoches	48 min

Nearby

Special Weather Statements in Louisiana, 2020 Every special weather statement in 2020

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.