Special Weather Statement, NWS Pueblo, CO

Area Forecast Discussion
National Weather Service Pueblo CO
611 PM MDT Sun Jun 6 2021

.UPDATE...
Issued at 608 PM MDT Sun Jun 6 2021

Activity has decreased near the Spring Burn Scar so have cancelled
the Flash Flood Watch. Will continue to see thunderstorms
propagate eastward across the plains overnight well to the east.
-KT

&&

.SHORT TERM...(This evening through Monday)
Issued at 314 PM MDT Sun Jun 6 2021

Main Concerns:

1) Spring burn scar flash flood potential this evening

Currently...Widespread convection and mostly cloudy skies from
essentially the I-25 Corridor and westward as of 230 PM, with some
threats to area burn scars as well. Meanwhile, the far eastern
plains remain sunny. Temps have warmed into the 80s to around 90F
for the plains, and into the mid 70s to lower 80s for the high
valleys.

Tonight and tomorrow...As was expected, a good amount of convection
fired over the higher terrain by midday and has provided for pcpn
and small hail along the eastern mts and westward. There has been
some spillover across El Paso County, but for the most part the I-25
Corridor south of El Paso County has been clear so far. Models are
continuing to show that these storms will eventually push off the
mts and head east across the plains tonight, coming to an end right
around 11 PM or midnight. So far, have not seen this movement as
storms have remained hugging the mts, and in fact were somewhat
training just north of the Springs burn scar. Because of this
training effect, had to hoist a Flash Flood Watch for that area.
Given the amount of rain the Spring scar has received yesterday, it
will likely not take much more in a short period of time. Main
threats through this evening for the plains will be wind gusts to 50
mph, brief periods of heavy rain, cloud to ground lightning and
small hail. Mostly clear skies overnight, then less of a threat for
convection tomorrow as the upper ridge tries to push back into the
region. There is some CAPE to work with along the eastern border,
but shear and dynamics are minimal so do not see convection
beginning until 2 or 3 pm, and being very isolated.

Plan on somewhat mild overnight low temps tonight, with readings in
the 40s for the high valleys, and 50s to around 60F for the plains.
Monday looks like it will be another hot one, with highs in the
upper 70s to mid 80s for the high valleys, and mid 80s to mid 90s
for the plains. Moore

.LONG TERM...(Monday night through Sunday)
Issued at 314 PM MDT Sun Jun 6 2021

...Evening thunderstorms will be possible over the plains on Monday,
a slight chance a few of these storms could become severe. Afternoon
and evening thunderstorms will be possible over the central and
eastern plains on Saturday and a slight chance on Sunday as well,
with some storms being possibly severe on Saturday...

Monday evening...

An U/L cut off low is going to be absorbed into the trough upstream
and help to add some moisture and instability later in the evening
on Monday. Some isolated thunderstorms that have developed earlier
in the day over the mountains will move across the plains throughout
the evening and there is a chance that some of these could become
severe as they move over the far eastern plains as they move into a
more unstable environment, with MLCAPE values near 2000 J/kg near
the Kansas Border. This is primarily skinny CAPE, therefore the main
threat with these storms will be large hail and strong gusty outflow
winds. HRRR is still showing the possible development af an MCS over
eastern Las Animas County and then moving into Baca County...there
has been some consistency with the timing of this developing right
around 00Z. HRRR is also showing in the latest model run, another
MCS developing around 02Z over southeastern El Paso County and
northeastern Pueblo County, and then propagating down to the
southeast over Crowley, Bent, Otero, and Kiowa counties. The NAM
Nest is picking up on the MCS over Las Animas County as well,
although later around 02Z, and by then has all of the convection
having already weaken and moved out of the Palmer Divide area. The
models do tend to agree with all of the convection winding down by
06Z as daytime heating diminishes, and CINH values are below
-200 J/kg. After this time, clearing will continue and lows will
only fall to the mid 50s to low 60s over the plains, and generally
40s for all other locations above 8000 ft and in the San Luis
Valley.

Tuesday through Saturday...

Ridging is going to continue to establish itself over the central
plains as the long wave troughing remains over the northwestern
region of the US, there will only be some minor perturbations in the
pattern as some of major and minor shortwaves transition mainly to
the north of Colorado. There is going to be one major shortwave
propagating to the north and eventually over the northern plains
that could have a frontal boundary with it extending down and nearly
into the CWA on Thursday, which could allow for some convection to
initiate along the boundary over the far northeastern plains, mainly
Kiowa County later in the evening. There could also be a dry line
setting up for Saturday during the afternoon as there will be
continued dry southwesterly winds at the surface and some mid level
flow of moisture upstream, as well as an increased southerly flow
with more moisture and high dewpoints ahead of this over the eastern
plains. All of these could set up a scenario for a potential severe
weather evening over the central and eastern plains for Saturday.
The ECMWF model also hints at possible thunderstorms over much of
the CWA for Sunday as well, although the GFS has a drier run,
showing no precipitation for Sunday. With the amplified ridge
overhead throughout the next week, coupled with adiabatically
warming downsloping winds out of the southwest, expect that
temperatures are going to get even slightly warmer over the next few
days with very hot temperatures for maximums over much of the CWA,
especially over the plains. Some areas could experience high
temperatures over 100 degrees in the Lower Arkansas River Valley on
Tuesday, with record highs possible in certain locations. There will
only be a slight cooldown going into the weekend, although
temperatures for the plains will still be in the low 90s and mid 80s
for the San Luis Valley. -Steward

&&

.AVIATION...(For the 00Z TAFS through 00Z Monday evening)
Issued at 314 PM MDT Sun Jun 6 2021

General northerly flow aloft will push convection to the south
through early evening. Focus for storms will gradually shift from
the mts to the plains through the evening where the greatest
available moisture lies. Convection will diminish by 05z, with
mostly clear skies overnight.

KALS: VFR conditions expected over the next 24 hrs. VCTS
through roughly 02z with winds gusting up to around 30 kts.

KCOS and KPUB: Overall, VFR conditions over the next 24 hrs.
However, convection over the higher terrain will affect both sites
with VCTS. Forecast of TSRA with variable gusty outflow winds and
vsby restriction until 03z, with intermittent MVFR conditions.
Improving conditions from 03z onward.

Less convective activity forecast for tomorrow.

&&

.PUB WATCHES/WARNINGS/ADVISORIES...
NONE.
&&

UPDATE...KT
SHORT TERM...MOORE
LONG TERM...STEWARD
AVIATION...MOORE

Hazardous Weather Outlook
National Weather Service Pueblo CO
626 PM MDT Sun Jun 6 2021

COZ058>089-093>099-080030-
Western Mosquito Range/East Lake County Above 11000 Feet-
Leadville Vicinity/Lake County Below 11000 Feet-
Eastern Sawatch Mountains Above 11000 Feet-
Western Chaffee County Between 9000 and 11000 Feet-
Central Chaffee County Below 9000 Feet-
Western Mosquito Range/East Chaffee County Above 9000 Feet-
Saguache County West of Continental Divide Below 10000 Feet-
Saguache County East of Continental Divide Below 10000 Feet-
La Garita Mountains Above 10000 Feet-
Upper Rio Grande Valley/Eastern San Juan Mountains Below
10000 Feet-Eastern San Juan Mountains Above 10000 Feet-
Del Norte Vicinity/Northern San Luis Valley Below 8500 Feet-
Alamosa  Vicinity/Central San Luis Valley Below 8500 Feet-
Southern San Luis Valley-
Northern Sangre de Cristo Mountains Between 8500 And 11000 Feet-
Northern Sangre de Cristo Mountains Above 11000 Feet-
Southern Sangre de Cristo Mountains Between 7500 and 11000 Feet-
Southern Sangre de Cristo Mountains Above 11000 Feet-
Northwestern Fremont County Above 8500 Feet-
Western/Central Fremont County Below 8500 Feet-
Wet Mountain Valley Below 8500 Feet-
Wet Mountains between 6300 and 10000 Feet-
Wet Mountains Above 10000 Feet-
Teller County/Rampart Range Above 7500 Feet/Pikes Peak Between
7500 And 11000 Feet-Pikes Peak Above 11000 Feet-
Canon City Vicinity/Eastern Fremont County-
Northern El Paso County/Monument Ridge/Rampart Range Below
7500 Feet-
Colorado Springs Vicinity/Southern El Paso County/Rampart Range
Below 7400 Feet-Pueblo Vicinity/Pueblo County Below 6300 Feet-
Walsenburg Vicinity/Upper Huerfano River Basin Below 7500 Feet-
Trinidad Vicinity/Western Las Animas County Below 7500 Feet-
Crowley County-La Junta Vicinity/Otero County-
Eastern Las Animas County-Western Kiowa County-
Eastern Kiowa County-Las Animas Vicinity/Bent County-
Lamar Vicinity/Prowers County-Springfield Vicinity/Baca County-
626 PM MDT Sun Jun 6 2021

This hazardous weather outlook is for portions of central...east
central...south central and southeast Colorado.

.DAY ONE...Tonight

Isolated to scattered thunderstorms will continue across the
southeast plains this evening with the main risks being locally
heavy rainfall, gusty winds up to 45 mph and dangerous cloud to
ground lightning. Some brief small hail will be possible with any
isolated stronger storms that can form near the eastern Colorado
border later this evening.

.DAYS TWO THROUGH SEVEN...Monday through Saturday

Mainly isolated thunderstorms are expected on Monday, with a risk
of lightning, gusty winds to 45 mph and small hail.

.SPOTTER INFORMATION STATEMENT...

Weather spotters will not be needed the rest of tonight.

31/31

Special Weather Statement
National Weather Service Pueblo CO
516 PM MDT Sun Jun 6 2021

COZ086-089-062345-
Pueblo Vicinity/Pueblo County Below 6300 Feet CO-Crowley County CO-
516 PM MDT Sun Jun 6 2021

...SIGNIFICANT WEATHER ADVISORY FOR WEST CENTRAL CROWLEY AND
NORTHEASTERN PUEBLO COUNTIES UNTIL 545 PM MDT...

At 516 PM MDT, Doppler radar was tracking a strong thunderstorm
developing 14 miles northeast of Boone, or 31 miles east of Pueblo,
moving southeast at 15 mph.

Half inch hail and wind gusts up to 50 mph will be possible with this
storm.

This storm will remain over mainly rural areas of west central
Crowley and northeastern Pueblo Counties.

LAT...LON 3839 10411 3843 10399 3841 10383 3827 10388
      3825 10410
TIME...MOT...LOC 2313Z 322DEG 15KT 3836 10404

Cohen

Special Weather Statement
National Weather Service Pueblo CO
527 PM MDT Sun Jun 6 2021

COZ074-088-070000-
Southern Sangre De Cristo Mountains Between 7500 and 11000 Ft CO-
Trinidad Vicinity/Western Las Animas County Below 7500 Ft CO-
527 PM MDT Sun Jun 6 2021

...SIGNIFICANT WEATHER ADVISORY FOR SOUTHWESTERN LAS ANIMAS COUNTY
UNTIL 600 PM MDT...

At 527 PM MDT, Doppler radar was tracking strong thunderstorms along
a line extending from Segundo to near Hoehne. Movement was south at 5
mph.

Penny size hail and wind gusts up to 50 mph will be possible with
these storms.

Locations impacted include...
Trinidad, Aguilar, Cokedale, Starkville, Boncarbo, Hoehne, Segundo
and Weston.

LAT...LON 3746 10463 3726 10425 3699 10454 3699 10496
TIME...MOT...LOC 2327Z 358DEG 5KT 3709 10478 3732 10444

Cohen

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE PUEBLO CO
553 PM MDT SUN JUN 6 2021

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

0222 PM     TORNADO          11 WSW BLANCA           37.36N 105.70W
06/06/2021                   COSTILLA           CO   PUBLIC

            BRIEF LANDSPOUT TORNADO REPORTED VIA SOCIAL
            MEDIA.

&&

Special Weather Statement
National Weather Service Pueblo CO
644 PM MDT Sun Jun 6 2021

COZ094-070115-
Eastern Las Animas County CO-
644 PM MDT Sun Jun 6 2021

...SIGNIFICANT WEATHER ADVISORY FOR CENTRAL LAS ANIMAS COUNTY UNTIL
715 PM MDT...

At 644 PM MDT, Doppler radar was tracking a strong thunderstorm 15
miles southeast of Thatcher, or 41 miles south of La Junta, moving
southeast at 10 mph.

Penny size hail and wind gusts up to 50 mph will be possible with
this storm.

This storm will remain over mainly rural areas of central Las Animas
County.

LAT...LON 3744 10401 3754 10370 3741 10356 3726 10361
      3718 10389 3730 10403
TIME...MOT...LOC 0044Z 322DEG 9KT 3742 10381

Cohen

Special Weather Statement
National Weather Service Pueblo CO
717 PM MDT Sun Jun 6 2021

COZ094-070145-
Eastern Las Animas County CO-
717 PM MDT Sun Jun 6 2021

...SIGNIFICANT WEATHER ADVISORY FOR EAST CENTRAL LAS ANIMAS COUNTY
UNTIL 745 PM MDT...

At 717 PM MDT, Doppler radar was tracking a strong thunderstorm 17
miles northwest of Kim, or 42 miles south of North La Junta, moving
southeast at 15 mph.

Half inch hail and wind gusts up to 50 mph will be possible with this
storm.

This storm will remain over mainly rural areas of east central Las
Animas County.

LAT...LON 3741 10392 3747 10358 3736 10333 3721 10368
      3725 10392
TIME...MOT...LOC 0117Z 301DEG 15KT 3737 10362

Cohen

Special Weather Statement
National Weather Service Pueblo CO
746 PM MDT Sun Jun 6 2021

COZ094-099-070230-
Springfield Vicinity/Baca County CO-Eastern Las Animas County CO-
746 PM MDT Sun Jun 6 2021

...SIGNIFICANT WEATHER ADVISORY FOR SOUTHWESTERN BACA AND
SOUTHEASTERN LAS ANIMAS COUNTIES UNTIL 830 PM MDT...

At 746 PM MDT, Doppler radar was tracking strong thunderstorms along
a line extending from 13 miles north of Kim to 22 miles east of
Branson. Movement was east at 20 mph.

Pea size hail and wind gusts up to 50 mph will be possible with these
storms.

Locations impacted include...
Kim.

LAT...LON 3739 10374 3755 10290 3700 10294 3700 10378
TIME...MOT...LOC 0146Z 271DEG 18KT 3743 10344 3700 10347

Cohen