Severe Thunderstorm Warning 56, NWS Fort Worth, TX

525 
WWUS54 KFWD 090325
SVSFWD

Severe Weather Statement
National Weather Service Fort Worth TX
1025 PM CDT Thu Apr 8 2021

TXC001-213-090345-
/O.CON.KFWD.SV.W.0056.000000T0000Z-210409T0345Z/
Henderson TX-Anderson TX-
1025 PM CDT Thu Apr 8 2021

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 1045 PM CDT
FOR SOUTHEASTERN HENDERSON AND NORTHEASTERN ANDERSON COUNTIES...

At 1025 PM CDT, a severe thunderstorm was located 12 miles southeast
of Athens, moving east at 40 mph.

HAZARD...Quarter size hail.

SOURCE...Radar indicated.

IMPACT...Damage to vehicles is possible.

Locations impacted include...
Frankston, Berryville, Coffee City and Poynor. 

PRECAUTIONARY/PREPAREDNESS ACTIONS...

For your protection stay inside a sturdy structure and keep away from
windows.

&&

LAT...LON 3186 9545 3200 9574 3203 9579 3209 9578
      3210 9580 3217 9562 3216 9548 3211 9546
      3208 9542 3207 9544 3204 9542 3203 9544
      3201 9543 3199 9545 3196 9545 3193 9542
TIME...MOT...LOC 0325Z 292DEG 33KT 3205 9573 

HAIL...1.00IN
WIND...<50MPH
 
$$

79

411 
WWUS54 KFWD 090333
SVSFWD

Severe Weather Statement
National Weather Service Fort Worth TX
1033 PM CDT Thu Apr 8 2021

TXC001-213-090343-
/O.CAN.KFWD.SV.W.0056.000000T0000Z-210409T0345Z/
Henderson TX-Anderson TX-
1033 PM CDT Thu Apr 8 2021

...THE SEVERE THUNDERSTORM WARNING FOR SOUTHEASTERN HENDERSON AND
NORTHEASTERN ANDERSON COUNTIES IS CANCELLED...
                
The storm which prompted the warning has weakened below severe
limits. Therefore the warning has been cancelled. However small hail
is still possible with this thunderstorm.

LAT...LON 3186 9545 3200 9574 3203 9579 3209 9578
      3210 9580 3217 9562 3216 9548 3211 9546
      3208 9542 3207 9544 3204 9542 3203 9544
      3201 9543 3199 9545 3196 9545 3193 9542
TIME...MOT...LOC 0332Z 292DEG 33KT 3202 9565 

$$

79

Area Forecast Discussion
National Weather Service Fort Worth TX
719 PM CDT Thu Apr 8 2021

...New Short Term, Aviation...

.SHORT TERM... /NEW/
Update:

The main change made with this package update was to up the PoPs
slightly across Central Texas early this evening and add the
mention of severe based on storm trends over the past few hours.
It does appear that the severe potential will decrease with the
loss of surface heating.

We will also adjust hourly clouds and temps/dew points based on
current trends.

79
&&

/Previous Discussion:
/This afternoon through Friday/

Another warm spring day is taking shape across North and Central TX
with temperatures already in the upper 70s to low 80s. Latest
visible satellite imagery show a mix of high clouds from the west
and low cumulus clouds from the south due to daytime heating and
moisture transport. The main update to this afternoon/evening
forecast was to increase PoPs across parts of Central and East TX.
Confidence is increasing that a few isolated storms could develop as
the warm front pushes north. Most of the CAMs are showing strong
low level winds and efficient warm advection that in combination
with sufficient instability, could support convective development.
While there are still some uncertainties on the placement of these
storms, it appears that areas east of the DFW Metroplex into East
TX will have the best potential as they will have the best
isentropic lift. IF storms develop, the will have the potential to
produce marginally severe hail as they move to the east. Any
activity should be east of our area late in the evening with no
other concerns expected the rest of the night.

Most of the area will remain precipitation free through the morning
hours on Friday. The only exception will be some areas along the Red
River to the northeast where a few showers and storms could attempt
to develop ahead of the approaching dryline/cold front. For now, we
kept 20% PoPs in the morning hours, with better storms chances later
in the afternoon. Otherwise, expect a very warm Friday afternoon
especially across the southwest (behind the dryline) where temps
could get into the mid 90s. The rest of the area is expected to stay
mainly in the mid/upper 80s. Elevated fire weather concerns will
continue Friday afternoon with the dry and warm weather behind the
dryline.

Sanchez

&&

.LONG TERM... /Issued 259 PM CDT Thu Apr 8 2021/
/Friday mid-afternoon through Thursday/

The forecast for severe weather Friday afternoon and early evening
remains one of high uncertainty due to its conditional nature.
(Conditionality in severe weather forecasting means that
thunderstorm development/coverage is uncertain, but should storms
develop then severe weather is a given.) The reason for this
difficulty is primarily due to a strong capping inversion that will
be over the region. While the cap is a common weather feature this
time of the year and often a critical ingredient for severe weather
too, we usually have a little more agreement among the various model
forecasts about whether it will hold or break. The ECMWF and its
ensembles continue to be most aggressive in breaking the cap with a
higher coverage of thunderstorms across the region along and to the
east of a dryline. The high-res CAM guidance continues to either
show the cap holding tough with either no storms or one or two
localized cap breaks for a couple of intense supercell
thunderstorms in our area. Given the strong dynamic lift and
classic setup of the weather features and pattern, it seems likely
that the cap will break and this forecast will continue to side
with the more aggressive CAM guidance, but not quite as bullish as
the ECMWF ensemble. While there was a "downgrade" from Enhanced
risk to Slight risk in the SPC day 2 forecast for a large part of
the area, we will remind users that these outlooks don't
necessarily say anything about the severity of severe weather,
but instead are forecasting the probability or coverage of severe
weather reports. Given the concerns about less coverage of storms
due to a strong cap, this lower risk category is appropriate, but
because any storm that does develop will have a significant severe
weather risk it means that everyone in an outlook area from
Marginal to Slight to Enhanced needs to monitor the weather from
late afternoon into the evening and have a way to receive
warnings. In the meantime, keep checking back for forecast updates
as we may get more visibility regarding a specific area's threat.

Based on the high resolution models the dryline will likely set up
along or just west of the I-35 corridor by mid to late afternoon.
The models appear to be displaying their usual bias of having the
dryline too far east and therefore we'll continue to hold PoPs
back to just west of the I-35/I-35W corridor. The dryline will be
a favored location for isolated thunderstorm development after 3
pm when max heating is occurring and the cap will be most
vulnerable for localized erosion. Any storms that develop will be
supercellular given favorable shear profiles and moderate to
strong instability. The instability parameters (steep mid-level
lapse rates and high buoyancy in the hail growth zone) point
toward a risk of very large hail (baseball size possible).
Obviously these surface based supercells will also have a risk
of damaging winds and possibly tornadoes, although these threats
are much lower than hail.

Meanwhile, a cold front will be moving into the area from the
northwest by early evening. Additional convection will develop along
the cold front in the region ahead of the dryline where the airmass
will be moist and unstable. Convection is more likely to initiate
in this region along the front because the dynamics associated
with cold fronts are better at breaking a cap than drylines are.
This means that we expect a near solid line developing across the
northeastern CWA that will track south-southeast during the
evening hours. This linear mode convection will have a higher
damaging wind threat and a lower potential for large hail that
will impact the northeastern and far eastern zones where the
potential for severe weather is highest in our area. All of this
convection should clear the region to the east around or shortly
after midnight.

Cooler and drier air will infiltrate the region behind the front as
northwesterly winds increase to 10 to 20 mph. Temperatures will drop
to the mid 40s in the northwest to the upper 50s in the southeast
zones by sunrise Saturday. Generally pleasant weather is expected
Saturday with highs in the 70s but winds may be a little breezy
leading to elevated fire danger over the western zones. Another
cool and clear night is expected Saturday night as winds begin to
switch to the south. Much warmer conditions are expected Sunday
with highs in the 80s, and even near 90 across the western zones.
Once again low RH and increasing southerly winds by afternoon will
lead to elevated fire danger mainly across the western zones. The
moist southerly flow will result in more low clouds and warmer
overnight lows Sunday night ahead of the next cold front.

This cold front will slowly move through the region during the day
Monday. While a moist and unstable airmass will exist over the
region ahead of the front, there will be an inversion and it may
be tough for it to be overcome. The way the low level wind field
sets up in an inverted trough fashion suggests that most
precipitation will occur behind the front and therefore will not
have access to higher instability. Thus I expect generally some
light showers and maybe an isolated storm or two Monday and into
Monday night behind the front. The chances of rain don't look
overly high initially but do increase as we head into midweek when
better isentropic lift will organize as upper level energy
crosses the country. The cold front will remain to our south as a
seasonably cool airmass and large surface anticyclone moves
southward into the heart of the CONUS. As a result temps will be a
little below normal (especially for high temps due to rain and
clouds) next week. Highs will be in the 60s and 70s with lows in
the 50s.

TR.92

&&

.AVIATION... /NEW/
/00Z TAFs/

A warm front will continue to surge northward through the evening
bringing an increase in low level moisture. A few storms will
continue across Central Texas through early evening, impacting
mainly Waco between 00 and 02Z. However, some of the storms that
have emerged out of a storm split earlier will continue to move
northeast, and will affect the Cedar Creek corner post through
about 03Z.

The moisture surge will continue overnight with the development
of a 40 Kt low level jet. MVFR stratus will develop over the Hill
Country, reaching Waco between 09 and 10Z and the Metroplex TAF
sites a couple of hours later. The stratus deck will linger for
much of the morning Friday, scattering out by midday. VFR is
expected Friday afternoon/night.

A dryline will move across the TAF sites Friday afternoon
followed by a cold front late Friday afternoon/evening. Although
there is a potential for storms (some severe) along the dryline,
a cap of warm air will likely limit convection until storms are
just east of the TAF sites. For now, we will leave TSRA out of
the TAF package and continue to monitor the forecasted cap
strength in later model runs.

A brief period of breezy southwest to west winds will occur
behind the dryline followed by a northwest to north wind shift
early in the evening Friday. Wind speeds will likely remain in
the 12 to 16 knot range through Friday evening with some gusts as
high as 25 knots.

79

&&

.PRELIMINARY POINT TEMPS/POPS...
Dallas-Ft. Worth    64  86  55  76  52 /   5  30  20   0   0
Waco                65  92  55  79  50 /  10  20  20   0   0
Paris               58  79  52  71  46 /  10  50  70   0   0
Denton              59  84  50  74  46 /   5  30  20   0   0
McKinney            61  83  52  74  47 /  10  40  40   0   0
Dallas              65  86  56  77  53 /  10  30  20   0   0
Terrell             62  84  54  75  47 /  30  30  40   0   0
Corsicana           64  86  55  77  50 /  30  20  30   0   0
Temple              64  91  56  80  48 /  10  10  10   0   0
Mineral Wells       60  91  50  76  47 /   5  10   5   0   0

&&

.FWD WATCHES/WARNINGS/ADVISORIES...
None.
&&

Hazardous Weather Outlook
National Weather Service Fort Worth TX
638 PM CDT Thu Apr 8 2021

TXZ091>095-100>107-115>123-129>135-141>148-156>162-174-175-091145-
Montague-Cooke-Grayson-Fannin-Lamar-Young-Jack-Wise-Denton-Collin-
Hunt-Delta-Hopkins-Stephens-Palo Pinto-Parker-Tarrant-Dallas-
Rockwall-Kaufman-Van Zandt-Rains-Eastland-Erath-Hood-Somervell-
Johnson-Ellis-Henderson-Comanche-Mills-Hamilton-Bosque-Hill-Navarro-
Freestone-Anderson-Lampasas-Coryell-Bell-McLennan-Falls-Limestone-
Leon-Milam-Robertson-
638 PM CDT Thu Apr 8 2021

This Hazardous Weather Outlook is for North and Central Texas.

.DAY ONE...Tonight.

A few strong to severe thunderstorms are possible across parts of
Central Texas early this evening with storms moving into East Texas
later in the evening. Large hail and damaging downburst winds will be
possible with the strongest storms. All storms should weaken below
severe limits before midnight.

.DAYS TWO THROUGH SEVEN...Friday through Wednesday.

Thunderstorm chances return Friday especially for areas along and
east of the I-35 corridor. Thunderstorm chances will be highest
across Northeast Texas and East Texas. There is a concern for severe
weather, with the main threat being very large hail, as well as a
damaging wind threat after dark Friday evening across East Texas. An
isolated tornado can't be ruled out with discrete storms early in the
event. The severe weather threat is expected to end by midnight
across all of North and Central Texas as storms exit to the east.

Elevated grass fire conditions are expected behind a dryline across
areas west of US-281 and south of I-20 Friday afternoon. Additional
elevated grass fire conditions are possible along and west of I-
35 Saturday and Sunday afternoons due to continued breezy and dry
conditions.

Low thunderstorm chances return Monday in advance of a cold front and
may linger into the middle of next week. No severe weather is
anticipated at this time with this activity.

.SPOTTER INFORMATION STATEMENT...
Widespread spotter activation is not expected at this time, though
any storm reports are appreciated.

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE FORT WORTH TX
818 PM CDT THU APR 8 2021

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

0722 PM     TSTM WND DMG     4 NNE TROY              31.25N 97.29W
04/08/2021                   BELL               TX   TRAINED SPOTTER

            12 INCH DIAMETER MESQUITE TREE SNAPPED
            BLOCKING WEST HILLIARD AND OLD TROY ROAD.

&&

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE FORT WORTH TX
819 PM CDT THU APR 8 2021

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

0803 PM     HAIL             8 W ROSEBUD             31.06N 97.10W
04/08/2021  E2.00 INCH       FALLS              TX   AMATEUR RADIO

            EGG SIZE HAIL 8 WEST OF ROSEBUD.

&&

SF

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE FORT WORTH TX
854 PM CDT THU APR 8 2021

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

0849 PM     HAIL             HEARNE                  30.88N 96.60W
04/08/2021  E1.25 INCH       ROBERTSON          TX   TRAINED SPOTTER

&&

SF

Special Weather Statement
National Weather Service Fort Worth TX
918 PM CDT Thu Apr 8 2021

TXZ147-161-090245-
Limestone TX-Freestone TX-
918 PM CDT Thu Apr 8 2021

...SIGNIFICANT WEATHER ADVISORY FOR SOUTHWESTERN FREESTONE AND
NORTHEASTERN LIMESTONE COUNTIES UNTIL 945 PM CDT...

At 917 PM CDT, Doppler radar was tracking a strong thunderstorm near
Mexia, moving southeast at 20 mph.

Half inch hail will be possible with this storm.

 Locations impacted include...
Groesbeck and Fort Parker State Park.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

This storm may intensify, so closely monitor for additional
information or possible warnings from the National Weather Service.

&&

LAT...LON 3160 9661 3168 9646 3156 9618 3135 9636
TIME...MOT...LOC 0217Z 310DEG 18KT 3162 9648

79

Special Weather Statement
National Weather Service Fort Worth TX
944 PM CDT Thu Apr 8 2021

TXZ135-090315-
Henderson TX-
944 PM CDT Thu Apr 8 2021

...SIGNIFICANT WEATHER ADVISORY FOR CENTRAL HENDERSON COUNTY UNTIL
1015 PM CDT...

At 944 PM CDT, Doppler radar was tracking a strong thunderstorm over
Enchanted Oaks, moving east at 45 mph.

Nickel size hail will be possible with this storm.

 Locations impacted include...
Athens, Gun Barrel City, Malakoff, Tool, Eustace, Trinidad, Enchanted
Oaks, Caney City, Payne Springs, Log Cabin, Murchison and Star
Harbor.

LAT...LON 3206 9564 3204 9580 3213 9610 3215 9610
      3216 9612 3215 9614 3216 9616 3218 9618
      3220 9616 3222 9615 3220 9618 3221 9619
      3232 9616 3228 9561
TIME...MOT...LOC 0244Z 283DEG 40KT 3223 9611

Bonnette

Special Weather Statement
National Weather Service Fort Worth TX
948 PM CDT Thu Apr 8 2021

TXZ147-162-090315-
Leon TX-Freestone TX-
948 PM CDT Thu Apr 8 2021

...SIGNIFICANT WEATHER ADVISORY FOR SOUTHEASTERN FREESTONE AND
CENTRAL LEON COUNTIES UNTIL 1015 PM CDT...

At 947 PM CDT, Doppler radar was tracking a strong thunderstorm near
Buffalo, moving east at 40 mph.

Nickel size hail will be possible with this storm.

 Locations impacted include...
Buffalo and Jewett.

LAT...LON 3122 9585 3142 9624 3147 9628 3159 9617
      3151 9574 3149 9574 3147 9572 3147 9574
      3146 9575 3146 9572
TIME...MOT...LOC 0247Z 292DEG 33KT 3150 9617

Bonnette