Tornado Warning 53, NWS Shreveport, LA

213 
WWUS54 KSHV 070233
SVSSHV

Severe Weather Statement
National Weather Service Shreveport LA
933 PM CDT FRI APR 6 2018

LAC043-069-070243-
/O.CAN.KSHV.TO.W.0053.000000T0000Z-180407T0300Z/
Grant LA-Natchitoches LA-
933 PM CDT FRI APR 6 2018

...THE TORNADO WARNING FOR WEST CENTRAL GRANT AND SOUTHEASTERN
NATCHITOCHES PARISHES IS CANCELLED...
                
The storm which prompted the warning has weakened below severe
limits, and no longer appears capable of producing a tornado.
Therefore the warning has been cancelled.

A tornado watch remains in effect until 1100 PM CDT for north central
and northwestern Louisiana.

LAT...LON 3157 9303 3166 9292 3158 9262 3145 9282
TIME...MOT...LOC 0231Z 293DEG 24KT 3157 9283 

$$

35

Area Forecast Discussion
National Weather Service Shreveport LA
714 PM CDT Fri Apr 6 2018

.DISCUSSION...
Clusters of intense tstms cold pooling swd across I-20. with
storms currently at the kshv and kggg terminals, and about to
enter the kmlu and ktyr terminals. Wind gusts to 40 to 50 kts,
large hail to near golfball size, torrential rain and dense ltg
strikes occurring in stronger storms. Frontal boundary associated
with these storms will bring winds shifting from south to n-ne at
15 to 25 kts and a few gusts over 30 kts possible by early Sat
mrng as stg inversion sets up postfrontal. Winds may finally
subside to around 10 kts by 07/21z. Cigs to lower behind boundary
to low mvfr to possible ifr. These cigs will then only slowly lift
back to high mvfr to possible low vfr by Sat aftn and will remain
out of the north./07/

&&

.PREV DISCUSSION... /issued 419 PM CDT Fri Apr 6 2018/

DISCUSSION...
Tornado Watch has been issued this afternoon for all of our NE TX
counties, far southern row of SW AR counties and all of our N LA
parishes. The watch is valid through 11 PM CDT this evening.

Very active period is underway this afternoon as tstms have begun
to rapidly fire along the warm frontal zone, which extends along
the Red River in NE TX/SE OK, tailing back to the SE near TXK and
ELD in south AR. These storms have been quick to intensify with a
significant hail potential as well as the threat of damaging wind
gusts. Due to the very warm and unstable air mass in place south
of the warm front, discrete supercells are a distinct possibility
with the threat of isolated tornadoes. Thus, the decision on the
Tornado Watch was made easier based on this thinking. Our 18Z SHV
sounding indicated the capping inversion still holding in the mid
levels, but further erosion of the cap has taken place with sfc
heating combined with cooling aloft due to the shortwave shifting
into the region. Meanwhile, forecast soundings show significant
sfc-based CAPE around 3000 J/kg in the warm sector this afternoon
combined with mid-level lapse rates around 8.5C/km. Deep layer is
also around 40 kts, plenty sufficient for rotating mesocyclones.
As the event further evolves this evening, the trend is expected
to be toward more of a damaging wind threat as the cold front
advances farther into the region with a developing QLCS which is
likely to intensify closer to the I-20 corridor. This linear
complex may result in severe straight-line wind gusts, possibly
exceeding 60 mph. This looks to be a potentially significant and
widespread threat, mainly across east Texas and north Louisiana.

The severe threat is expected to wane as we approach midnight with
the current Tornado Watch expiring at 11 PM CDT. The other concern
will be for heavy rainfall with this line of storms which may
result in some isolated flash flooding. Post-frontal convection
will continue through Saturday morning, but the threat of severe
weather and flooding will be ending with frontal passage across
our southern sections by midnight if not before. A very chilly and
raw day will follow on Saturday with highs only in the 40s and 50s,
a far cry from the spring-like temperatures we have experienced
so far this month. In fact, some areas in our northern counties
over SE OK and SW AR are likely to fall to the freezing mark by
Sunday morning so a freeze warning may be needed for these areas
with future forecasts.

A modest warm-up will follow on Sunday with returning southeast
winds and high temperatures reaching back into the 60s. Another
cold front will shift south toward the region early the new week
with a slight chance of showers, but limited moisture return will
prevent widespread rainfall. The remainder of next week looks
mostly dry and seasonal with high temperatures climbing back into
the 70s and 80s. Our next rain chances will likely hold off until
late Friday into next weekend with another cold front arriving on
Saturday.

/19/

&&

.PRELIMINARY POINT TEMPS/POPS...
SHV  46  50  37  64 / 100  30   0   0
MLU  45  48  35  63 / 100  50   0   0
DEQ  40  51  32  62 /  80  20   0   0
TXK  42  49  34  61 /  90  30   0   0
ELD  39  47  31  62 / 100  30   0   0
TYR  46  51  38  65 /  90  20   0   0
GGG  47  51  36  64 / 100  30   0   0
LFK  56  58  39  69 /  90  40  10   0

&&

.SHV WATCHES/WARNINGS/ADVISORIES...
AR...None.
LA...None.
OK...None.
TX...None.
&&

Hazardous Weather Outlook
National Weather Service Shreveport LA
1203 PM CDT Fri Apr 6 2018

ARZ050-051-059>061-070>073-LAZ001>006-010>014-017>022-OKZ077-
TXZ096-097-108>112-124>126-136>138-149>153-165>167-071715-
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-
1203 PM CDT Fri Apr 6 2018

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...This Afternoon and Tonight...

Thunderstorms will gradually become more widespread and increase
in intensity across our northern areas early this afternoon, with
a few damaging wind gusts possible. The threat for severe storms
will increase significantly as we move into the mid to late
afternoon and evening hours, as a cold front brings these storms
southward across the entire region. Damaging winds and large hail
will be the primary threats, but a few tornadoes and even some
localized flooding cannot be ruled out. The threat for severe
storms will gradually diminish during the overnight hours, as the
cold front moves away from our area.

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

No hazardous weather is expected at this time.

.SPOTTER INFORMATION STATEMENT...

Activation of emergency management personnel...amateur radio
operators...and storm spotters will likely be needed by late this
afternoon through this evening.

19

Special Weather Statement
National Weather Service Shreveport LA
802 PM CDT FRI APR 6 2018

TXZ137-150-151-070145-
Gregg TX-Panola TX-Rusk TX-
802 PM CDT FRI APR 6 2018

...SIGNIFICANT WEATHER ADVISORY FOR NORTHWESTERN PANOLA...
NORTHEASTERN RUSK AND SOUTHEASTERN GREGG COUNTIES UNTIL 845 PM CDT...

At 801 PM CDT, Doppler radar was tracking a strong thunderstorm 8
miles southwest of Tatum, or 11 miles northeast of Henderson, moving
southeast at 30 mph.

Half inch hail, moderate rainfall and winds in excess of 40 mph will
be possible with this storm.

Locations impacted include...
Tatum, Beckville, Lakeport, Easton, Chalk Hill, Monroe, Oak Hill and
Stewart.

A tornado watch remains in effect until 1100 PM CDT for northeastern
Texas.

LAT...LON 3222 9486 3240 9473 3238 9447 3237 9446
      3237 9445 3236 9444 3237 9442 3220 9448
      3221 9451 3218 9453
TIME...MOT...LOC 0101Z 303DEG 24KT 3225 9464

FB

Special Weather Statement
National Weather Service Shreveport LA
834 PM CDT FRI APR 6 2018

TXZ136-149-150-070215-
Cherokee TX-Smith TX-Rusk TX-
834 PM CDT FRI APR 6 2018

...SIGNIFICANT WEATHER ADVISORY FOR SOUTHEASTERN SMITH...CENTRAL RUSK
AND NORTH CENTRAL CHEROKEE COUNTIES UNTIL 915 PM CDT...

At 834 PM CDT, Doppler radar was tracking a strong thunderstorm near
Pinehill, or 8 miles southeast of Henderson, moving southeast at 40
mph.

Half inch hail and winds in excess of 40 mph will be possible with
this storm.

Locations impacted include...
Henderson, Troup, New London, Arp, Turnertown, Minden, Joinerville,
Pinehill, Chapman, Church Hill and Brachfield.

A tornado watch remains in effect until 1100 PM CDT for northeastern
Texas.

LAT...LON 3226 9510 3219 9458 3216 9458 3211 9460
      3206 9460 3198 9465 3212 9516
TIME...MOT...LOC 0134Z 301DEG 33KT 3209 9467

FB

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE SHREVEPORT LA
835 PM CDT FRI APR 6 2018

..TIME...   ...EVENT...      ...CITY LOCATION...     ...LAT.LON...
..DATE...   ....MAG....      ..COUNTY LOCATION..ST.. ...SOURCE....
            ..REMARKS..

0744 PM     TSTM WND DMG     1 SSW COUSHATTA         32.02N 93.35W
04/06/2018                   RED RIVER          LA   LAW ENFORCEMENT

            TREES DOWN ALL OVER COUSHATTA.

&&

PALMER

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE SHREVEPORT LA
859 PM CDT FRI APR 6 2018

..TIME...   ...EVENT...      ...CITY LOCATION...     ...LAT.LON...
..DATE...   ....MAG....      ..COUNTY LOCATION..ST.. ...SOURCE....
            ..REMARKS..

0635 PM     HAIL             6 N HALLSVILLE          32.59N 94.59W
04/06/2018  E1.75 INCH       HARRISON           TX   NWS EMPLOYEE

&&

PALMER

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE SHREVEPORT LA
916 PM CDT FRI APR 6 2018

..TIME...   ...EVENT...      ...CITY LOCATION...     ...LAT.LON...
..DATE...   ....MAG....      ..COUNTY LOCATION..ST.. ...SOURCE....
            ..REMARKS..

0827 PM     TSTM WND DMG     COLUMBIA                32.10N 92.07W
04/06/2018                   CALDWELL           LA   LAW ENFORCEMENT

            TREES DOWN ON LAKESIDE AVE.

&&

PALMER

Special Weather Statement
National Weather Service Shreveport LA
917 PM CDT FRI APR 6 2018

TXZ136-149-150-152-070300-
Cherokee TX-Smith TX-Nacogdoches TX-Rusk TX-
917 PM CDT FRI APR 6 2018

...SIGNIFICANT WEATHER ADVISORY FOR SOUTHERN SMITH...SOUTHWESTERN
RUSK...NORTHWESTERN NACOGDOCHES AND NORTHERN CHEROKEE COUNTIES UNTIL
1000 PM CDT...

At 917 PM CDT, Doppler radar was tracking a strong thunderstorm over
Whitehouse, moving southeast at 35 mph.

Half inch hail, moderate rainfall and winds in excess of 40 mph will
be possible with this storm.

Locations impacted include...
Tyler, Jacksonville, Henderson, Whitehouse, Rusk, Overton, Bullard,
Troup, New London, Arp, Ponta, New Salem, Trawick, Mount Selman,
Joinerville, Sacul, Mixon, Turnertown, Reese and Minden.

A tornado watch remains in effect until 1100 PM CDT for eastern and
northeastern Texas.

LAT...LON 3243 9553 3240 9511 3205 9460 3166 9477
      3190 9544 3193 9542 3196 9545 3199 9545
      3201 9543 3204 9544 3205 9542 3207 9544
      3208 9542 3215 9548 3218 9546 3223 9549
      3230 9545 3232 9546 3236 9545
TIME...MOT...LOC 0217Z 300DEG 32KT 3222 9526

FB