Alert archive / Texas / Special Weather Statements in 2021

Special Weather Statement, NWS Shreveport, LA

April 16, 2021Shelby County, Texas

NWS Shreveport, LA issued this special weather statement at Apr 16, 2021, 12:08 PM CDT for Shelby County, Texas. It was in force for 52 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
Apr 16, 2021, 12:08 PM CDT (17:08 UTC)
Expired
Apr 16, 2021, 1:00 PM CDT
In force
52 min
Issued by
NWS Shreveport, LA

County Shelby County, TX

The radar

The Shreveport radar (KSHV), 79 km from the middle of the area, began a volume at 17:11 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, 5.1 hours before the alert went out and 87 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 12:00Z on 2021-04-16Temperature 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 12:00Z on 2021-04-16The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 217 square meters per square second.1939587897117Sfc1 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
666 m above ground
0-6 km bulk shear
55 kt
0-1 km storm-relative helicity
217 m²/s²
0-3 km storm-relative helicity
203 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 Apr 16, 11:09 AM CDT, 59 minutes earlier.

Area forecast discussion, Apr 16, 11:09 AM CDT, 59 minutes before
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Hazardous weather outlook, Apr 16, 6:06 AM CDT, 6 hours 2 minutes before
Hazardous Weather Outlook
National Weather Service Shreveport LA
606 AM CDT Fri Apr 16 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>167-171115-
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 Fri Apr 16 2021

This Hazardous Weather Outlook is for southern Arkansas, for
northern Louisiana, for eastern Texas and southeast Oklahoma.

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

Showers and thunderstorms will be ongoing today ahead of an
approaching upper level disturbance with a surface low and a cold
front this evening. A few strong storms containing hail cannot be
ruled out along with some isolated areas of flooding possible as
storms train over the same areas, especially south of I-20.
No other hazardous weather is expected.

.DAYS TWO THROUGH SEVEN...Saturday through Thursday...

Cooler and drier weather is expected for the rest of the weekend
into the start of the new work week with arriving high pressure.
Another reinforcing cool front will arrive late on Tuesday with
limited moisture allowing for lesser amounts of rainfall.

.SPOTTER INFORMATION STATEMENT...

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

24

In the hours before

Special weather statement, Apr 16, 10:31 AM CDT, 1 hour 37 minutes before
Special Weather Statement
National Weather Service Shreveport LA
1031 AM CDT Fri Apr 16 2021

TXZ149-161615-
Cherokee TX-
1031 AM CDT Fri Apr 16 2021

...SIGNIFICANT WEATHER ADVISORY FOR CENTRAL CHEROKEE COUNTY UNTIL
1115 AM CDT...

At 1031 AM CDT, Doppler radar was tracking a strong thunderstorm 10
miles northeast of Palestine, moving east at 45 mph.

Penny size hail and winds in excess of 40 mph will be possible with
this storm.

Locations impacted include...
Jacksonville, Rusk, Alto, Morrill, Ponta, Maydelle, Gallatin and
Reklaw.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Frequent cloud to ground lightning is occurring with this storm.
Lightning can strike 10 miles away from a thunderstorm. Seek a safe
shelter inside a building or vehicle.

This storm may intensify, so be certain to monitor local radio
stations and available television stations for additional information
and possible warnings from the National Weather Service.

&&

LAT...LON 3199 9545 3192 9499 3186 9498 3157 9505
      3167 9529 3170 9531 3172 9534 3174 9533
      3173 9537 3175 9536 3176 9540 3182 9540
      3184 9542 3185 9544 3188 9543 3190 9544
      3193 9542 3196 9545
TIME...MOT...LOC 1531Z 284DEG 38KT 3189 9556

33
Special weather statement, Apr 16, 11:23 AM CDT, 45 minutes before
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Special weather statement, Apr 16, 12:08 PM CDT, 0 minutes before
Special Weather Statement
National Weather Service Shreveport LA
1208 PM CDT Fri Apr 16 2021

LAZ010-TXZ151-153-161800-
De Soto LA-Panola TX-Shelby TX-
1208 PM CDT Fri Apr 16 2021

...SIGNIFICANT WEATHER ADVISORY FOR SOUTHWESTERN DE SOTO PARISH...
SOUTHEASTERN PANOLA AND NORTHERN SHELBY COUNTIES UNTIL 100 PM CDT...

At 1207 PM CDT, Doppler radar was tracking a strong thunderstorm over
Timpson, or 17 miles northwest of Center, moving east at 45 mph.

Penny size hail and winds in excess of 30 mph will be possible with
this storm.

Locations impacted include...
Logansport, Tenaha, Timpson, Joaquin, Huxley, Stanley, James and
Paxton.

LAT...LON 3184 9445 3186 9446 3187 9446 3188 9448
      3190 9448 3191 9450 3192 9451 3200 9451
      3204 9389 3180 9388
TIME...MOT...LOC 1707Z 269DEG 37KT 3190 9445

19

The office that day

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

IssuedProductOfficeCountiesLasted
Apr 16, 10:31 AM CDTSpecial Weather StatementSHVCherokee44 min
Apr 16, 11:23 AM CDTSpecial Weather StatementSHVNacogdoches52 min
Apr 16, 12:51 PM CDTSpecial Weather StatementSHVDe Soto, Red River54 min
Apr 16, 1:46 PM CDTSpecial Weather StatementSHVSabine44 min
Apr 16, 2:03 PM CDTSevere Thunderstorm WarningSHVDe Soto, Natchitoches, Sabine42 min
Apr 16, 2:46 PM CDTSpecial Weather StatementSHVGrant44 min

Nearby

Special Weather Statements in Texas, 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.