Alert archive / Texas / Special Weather Statements in 2021

Special Weather Statement, NWS Shreveport, LA

August 19, 2021Marion County, Texas

NWS Shreveport, LA issued this special weather statement at Aug 19, 2021, 12:35 PM CDT for Marion County, Texas. It was in force for 40 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: Aug 19, 2021, 12:35 PM CDT (17:35 UTC)
Expired: Aug 19, 2021, 1:15 PM CDT
In force: 40 min
Issued by: NWS Shreveport, LA
Hail: 0.00 in
Wind: 40

County Marion County, TX

The radar

The Shreveport radar (KSHV), 65 km from the middle of the area, began a volume at 17:37 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 12:00Z, 5.6 hours before the alert went out and 70 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: 1122 J/kg
Mixed-layer CIN: -38 J/kg
Mixed-layer LCL: 771 m above ground
0-6 km bulk shear: 9 kt
0-1 km storm-relative helicity: 10 m²/s²
0-3 km storm-relative helicity: 40 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 Aug 19, 12:32 PM CDT, 3 minutes earlier.

Area forecast discussion, Aug 19, 12:32 PM CDT, 3 minutes before

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Hazardous weather outlook, Aug 19, 3:17 AM CDT, 9 hours 18 minutes before

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In the hours before

Special weather statement, Aug 19, 12:31 PM CDT, 4 minutes before

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Special weather statement, Aug 19, 12:35 PM CDT, 0 minutes before

Special Weather Statement
National Weather Service Shreveport LA
1235 PM CDT Thu Aug 19 2021

TXZ126-138-191815-
Harrison TX-Marion TX-
1235 PM CDT Thu Aug 19 2021

...A strong thunderstorm will impact portions of central Marion and
northern Harrison Counties through 115 PM CDT...

At 1235 PM CDT, Doppler radar was tracking a strong thunderstorm over
Harleton, or 15 miles northeast of Longview, moving northeast at 25
mph.

HAZARD...Winds in excess of 40 mph.

SOURCE...Radar indicated.

IMPACT...Gusty winds could knock down tree limbs and blow around
         unsecured objects.

Locations impacted include...
Jefferson, Berea, Harleton, Lodi, Woodlawn, Uncertain, Lassater,
Nesbitt and Pruett.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

If outdoors, consider seeking shelter inside a building.

&&

LAT...LON 3288 9445 3288 9424 3270 9413 3254 9457
      3270 9470
TIME...MOT...LOC 1735Z 234DEG 23KT 3267 9457

MAX HAIL SIZE...0.00 IN
MAX WIND GUST...40 MPH

50

The office that day

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

Issued	Product	Office	Counties	Lasted
Aug 19, 6:51 AM CDT	Areal Flood Advisory	SHV	Red River	3 hr
Aug 19, 7:01 AM CDT	Areal Flood Advisory	SHV	Bowie, Morris, Titus	3 hr
Aug 19, 1:31 PM CDT	Special Weather Statement	SHV	Cass, Morris	44 min
Aug 19, 12:31 PM CDT	Special Weather Statement	SHV	Caddo	44 min
Aug 19, 1:26 PM CDT	Special Weather Statement	SHV	Bossier	34 min
Aug 19, 1:29 PM CDT	Special Weather Statement	SHV	Bossier	46 min
Aug 19, 2:06 PM CDT	Special Weather Statement	SHV	Red River	24 min
Aug 19, 3:29 PM CDT	Special Weather Statement	SHV	Ouachita, Union	46 min
Aug 19, 2:24 PM CDT	Special Weather Statement	SHV	Columbia	36 min
Aug 19, 3:24 PM CDT	Special Weather Statement	SHV	Hempstead, Little River, Sevier	36 min

Nearby

Special Weather Statements in Texas, 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.