Alert archive / Arkansas / Special Weather Statements in 2021

Special Weather Statement, NWS Shreveport, LA

July 12, 2021Lafayette County, Arkansas

NWS Shreveport, LA issued this special weather statement at Jul 12, 2021, 2:28 PM CDT for Lafayette County, Arkansas. It was in force for 47 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 12, 2021, 2:28 PM CDT (19:28 UTC)
Expired: Jul 12, 2021, 3:15 PM CDT
In force: 47 min
Issued by: NWS Shreveport, LA

County Lafayette County, AR

The radar

The Shreveport radar (KSHV), 81 km from the middle of the area, began a volume at 19:28 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 12:00Z, 7.5 hours before the alert went out and 333 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: 43 J/kg
Mixed-layer CIN: -121 J/kg
Mixed-layer LCL: 964 m above ground
0-6 km bulk shear: 15 kt
0-1 km storm-relative helicity: -53 m²/s²
0-3 km storm-relative helicity: -85 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 Jul 12, 12:19 PM CDT, 2 hours 9 minutes earlier.

Area forecast discussion, Jul 12, 12:19 PM CDT, 2 hours 9 minutes before

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Hazardous weather outlook, Jul 12, 6:06 AM CDT, 8 hours 22 minutes before

Hazardous Weather Outlook
National Weather Service Shreveport LA
606 AM CDT Mon Jul 12 2021

ARZ050-051-059>061-070>073-LAZ001>006-010>014-017>022-OKZ077-
TXZ096-097-108>112-124>126-136>138-149>153-165>167-131115-
Sevier-Howard-Little River-Hempstead-Nevada-Miller-Lafayette-
Columbia-Union-Caddo-Bossier-Webster-Claiborne-Lincoln-De Soto-
Red River-Bienville-Jackson-Ouachita-Sabine-Natchitoches-Winn-
Grant-Caldwell-La Salle-McCurtain-Bowie-Franklin-Titus-Camp-
Morris-Cass-Wood-Upshur-Marion-Smith-Gregg-Harrison-Cherokee-Rusk-
Panola-Nacogdoches-Shelby-Angelina-San Augustine-
606 AM CDT Mon Jul 12 2021

This Hazardous Weather Outlook is for portions of south central
Arkansas, southwest Arkansas, north central Louisiana, northwest
Louisiana, southeast Oklahoma, east Texas and northeast Texas.

.DAY ONE...Today and Tonight...

Isolated to widely scattered showers and thunderstorms will remain
possible across much of the region today into this evening as an
upper level trough and stalled frontal boundary continue to linger.
Although no organized severe threat exists, any storms that manage
to develop may produce some gusty winds and brief heavy downpours.

.DAYS TWO THROUGH SEVEN...Tuesday through Sunday...

Diurnally driven showers and thunderstorms will remain possible
each day through the remainder of this week and into the weekend.
Stronger storms may be capable of producing gusty winds and brief
heavy downpours, generally more of a concern during the hours of
afternoon peak heating.

.SPOTTER INFORMATION STATEMENT...

Activation of emergency management personnel, amateur radio
operators and storm spotters should not be needed through tonight.

19

In the hours before

Special weather statement, Jul 12, 1:56 PM CDT, 32 minutes before

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Special weather statement, Jul 12, 2:28 PM 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
Jul 11, 7:23 PM CDT	Special Weather Statement	SHV	Rusk	52 min
Jul 11, 8:25 PM CDT	Areal Flood Advisory	SHV	Rusk	110 min
Jul 11, 8:31 PM CDT	Special Weather Statement	SHV	Rusk	44 min
Jul 11, 8:40 PM CDT	Special Weather Statement	SHV	Cherokee	50 min
Jul 11, 9:10 PM CDT	Flash Flood Warning Considerable damage threat	SHV	Cherokee, Panola, Rusk, Shelby, Smith	3 hr
Jul 11, 9:49 PM CDT	Special Weather Statement	SHV	Cherokee	41 min
Jul 11, 10:27 PM CDT	Special Weather Statement	SHV	Nacogdoches	48 min
Jul 11, 10:50 PM CDT	Special Weather Statement	SHV	Smith	40 min
Jul 11, 11:12 PM CDT	Special Weather Statement	SHV	Smith	48 min
Jul 11, 11:15 PM CDT	Special Weather Statement	SHV	Gregg	45 min
Jul 12, 12:13 AM CDT	Flash Flood Warning	SHV	Cherokee, Rusk, Smith	4 hr
Jul 12, 2:10 AM CDT	Areal Flood Advisory	SHV	Cherokee, Nacogdoches	3 hr
Jul 12, 6:28 AM CDT	River Flood Warning	SHV	Anderson, Cherokee, Houston, Trinity	21 days
Jul 12, 6:28 AM CDT	River Flood Warning	SHV	Nacogdoches, Rusk	25 hr
Jul 12, 8:20 AM CDT	River Flood Warning	SHV	Angelina, Houston, Polk, Trinity, Tyler	11 days
Jul 12, 1:56 PM CDT	Special Weather Statement	SHV	Wood	49 min
Jul 12, 2:37 PM CDT	Severe Thunderstorm Warning	SHV	Wood	43 min
Jul 11, 7:12 PM CDT	Special Weather Statement	SHV	Red River	48 min
Jul 11, 8:03 PM CDT	Special Weather Statement	SHV	Webster	42 min
Jul 11, 8:53 PM CDT	Special Weather Statement	SHV	Caddo	52 min
Jul 12, 6:15 AM CDT	Special Weather Statement	SHV	LaSalle	30 min

Nearby

Special Weather Statements in Arkansas, 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.