Alert archive / Louisiana / Special Weather Statements in 2021

Special Weather Statement, NWS Shreveport, LA

February 10, 2021Union Parish, Louisiana

NWS Shreveport, LA issued this special weather statement at Feb 10, 2021, 10:21 PM CST for Union 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
Feb 10, 2021, 10:21 PM CST (04:21 UTC)
Expired
Feb 10, 2021, 11:00 PM CST
In force
39 min
Issued by
NWS Shreveport, LA

County Union Parish, LA

The radar

The Shreveport radar (KSHV), 129 km from the middle of the area, began a volume at 04:20 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

Shreveport, LA (KSHV), launched 00:00Z, 4.4 hours before the alert went out and 120 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-pSkew-T log-p diagram, Shreveport, LA at 00:00Z on 2021-02-11Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 0 joules per kilogram.LCL10008507005003002001001 km2 km3 km6 km9 km12 km15 km-30°-20°-10°0°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Shreveport, LA at 00:00Z on 2021-02-11The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 144 square meters per square second.19395878Sfc1 km3 km6 km9 kmRMLM
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
493 m above ground
0-6 km bulk shear
42 kt
0-1 km storm-relative helicity
144 m²/s²
0-3 km storm-relative helicity
242 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.8

Open this sounding in Storm Lab

The text

As transmitted.

648 
WWUS84 KSHV 110421
SPSSHV

Special Weather Statement
National Weather Service Shreveport LA
1021 PM CST Wed Feb 10 2021
 
ARZ073-LAZ004>006-110500-
Union AR-Lincoln LA-Union LA-Claiborne LA-
1021 PM CST Wed Feb 10 2021

...SIGNIFICANT WEATHER ADVISORY FOR SOUTHEASTERN UNION COUNTY...
NORTHERN UNION...EAST CENTRAL CLAIBORNE AND NORTH CENTRAL LINCOLN
PARISHES UNTIL 1100 PM CST...

At 1021 PM CST, Doppler radar was tracking a strong thunderstorm near
Bernice, or 15 miles south of Junction City, moving northeast at 45
mph.

Pea size hail will be possible with this storm.

Locations impacted include...
Huttig, Bernice, Strong, Urbana, Cooley, Lapile, Marion, Spearsville,
Lillie, New London, Aurelle, Oakland, Taylorville, Hillsboro, Corney
Lake, Lockhart, Cecil, Shiloh and Litroe.

LAT...LON 3270 9275 3287 9288 3327 9236 3295 9211
TIME...MOT...LOC 0421Z 239DEG 37KT 3280 9276 

$$

13

The office that day

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

IssuedProductOfficeCountiesLasted
Feb 11, 3:26 PM CSTWinter Weather AdvisorySHVAngelina, Gregg, Harrison, Panola, Rusk, Sabine and 2 more21 hr
Feb 10, 6:28 PM CSTSpecial Weather StatementSHVCaddo47 min
Feb 10, 7:20 PM CSTSpecial Weather StatementSHVLafayette40 min
Feb 10, 10:36 PM CSTSpecial Weather StatementSHVMiller39 min
Feb 10, 11:32 PM CSTSpecial Weather StatementSHVHempstead43 min

Nearby

Special Weather Statements in Louisiana, 2021Every 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.