Special Weather Statement, NWS Pueblo, CO

Area Forecast Discussion
National Weather Service Pueblo CO
252 PM MDT Sat Jul 15 2017

.SHORT TERM...(This evening through Sunday)
Issued at 250 PM MDT Sat Jul 15 2017

...Upper Monsoonal Circulation Still Impacting the Region...

The upper monsoonal disturbance that has been swirling showers and
thunderstorms across the area for the past 24 hours or so continues
to impact the region this afternoon.  The circulation is clear in
satellite and radar loops.  Disturbance will continue to impact the
region through this evening.  Most activity should end from west to
east by around midnight although some activity may linger along the
Kansas border area until after midnight.  Airmass remains very moist
with ample moisture through all depths of the troposphere.  This
will continue to make for very efficient moisture to rainfall
conversion processes. Thus, along with the lightning threat, the
risks of heavy rain and flash flooding will continuing, particularly
on area burn scars.  A few storms may also produce locally gusty
winds to around 50 mph and some small hail.  Based on high res model
runs, it looks like the greatest concentration of storms this
evening may end up over the plains east of the I-25 corridor,
nearest the monsoon circulation center.  Some drier air may actually
begin working into the I-25 corridor region by this evening.

On Sunday, some drier air will start filtering into southern
Colorado on the back side of the old monsoonal disturbance.  This
should bring a much less active day to a lot of the plains. However,
the far eastern plains may be close enough to the old disturbance to
still see a fair number of storms.  Also, the mountains should still
see a fair amount of activity in the afternoon once the lifting
effect from terrain and strong heating kicks in.  So, while the I-25
corridor and most of the plains looks considerably drier, the far
eastern plains and mountains could still be fairly active. The
thunderstorm risks will continue to be the same as today but on a
smaller, more localized scale.  Although the scale will be smaller,
the burn scar areas will still have to be monitored.  If any one of
the scars happens to get hit by a storm, flash flooding will be a
concern given the monsoon moisture that will still exist over the
mountain areas.

.LONG TERM...(Sunday night through Saturday)
Issued at 250 PM MDT Sat Jul 15 2017

The monsoon plume, for the most part, will remain over the region
during this long term forecast period, as guidance shows high RH
values remaining over the area along with a ribbon of max precip
water values. Showers and thunderstorms will be scattered to likely
over the mountains. However we will likely see somewhat drier
conditions over the lower elevations (as compared to the last few
days) along with warmer conditions. Temperatures over the lower
elevations will warm up with mid to upper 90s returning to the
plains, 70s and 80s mtns/valleys.

&&

.AVIATION...(For the 00Z TAFS through 00Z Sunday evening)
Issued at 250 PM MDT Sat Jul 15 2017

Old monsoonal disturbance will continue drifting slowly east across
the plains portion of the flight area through this evening. It will
drift only very slowly eastward. This will continue showers and
storms across the far eastern plains through the evening with
activity becoming more isolated from the I-25 corridor westward.
Primary risks will include lightning and heavy rain. Additionally,
local flash flooding, gusty winds to around 50 mph and small hail
will be possible. Areas of MVFR, IFR and LIFR GIGS and VSBYS can be
expected through precipitation. These conditions will be fairly
scattered from the I-25 corridor westward but more widespread east
of the corridor.  Most activity should diminish from west to east by
around midnight although some activity may linger along the Kansas
border past midnight.

The airmass will dry out considerably over the flight area on Sunday
as dry air on the back side of the monsoon disturbance filters into
the region.  However, convection will not shut down completely.
Favored areas will include the mountains and also the far eastern
plains adjacent to Kansas.  These areas will still have a good
amount of monsoon moisture to work with.  For the areas in between,
including the I-25 corridor and most of the plains, there will be
less moisture to work with and, therefore, less activity.

All 3 terminal sites, KCOS, KPUB and KALS, will be subject to
thunderstorms and the general conditions described above.

&&

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

SHORT TERM...LW
LONG TERM...HODANISH
AVIATION...LW

Hazardous Weather Outlook
National Weather Service Pueblo CO
1108 AM MDT Sat Jul 15 2017

COZ058>089-093>099-161715-
Western Mosquito Range/East Lake County Above 11000 Ft-
Leadville Vicinity/Lake County Below 11000 Ft-
Eastern Sawatch Mountains above 11000 Ft-
Western Chaffee County Between 9000 and 11000 Ft-
Central Chaffee County Below 9000 Ft-
Western Mosquito Range/East Chaffee County above 9000Ft-
Saguache County West of Continental Divide Below 10000 Ft-
Saguache County East of Continental Divide below 10000 Ft-
La Garita Mountains Above 10000 Ft-
Upper Rio Grande Valley/Eastern San Juan Mountains Below 10000 Ft-
Eastern San Juan Mountains Above 10000 Ft-
Del Norte Vicinity/Northern San Luis Valley Below 8500 Ft-
Alamosa  Vicinity/Central San Luis Valley Below 8500 Ft-
Southern San Luis Valley-
Northern Sangre de Cristo Mountains Between 8500 And 11000 Ft-
Northern Sangre de Cristo Mountains above 11000 Ft-
Southern Sangre de Cristo Mountains Between 7500 and 11000 Ft-
Southern Sangre de Cristo Mountains Above 11000 Ft-
Northwestern Fremont County  Above 8500Ft-
Western/Central Fremont County Below 8500 Ft-
Wet Mountain Valley Below 8500 Ft-
Wet Mountains between 6300 and 10000Ft-
Wet Mountains above 10000 Ft-
Teller County/Rampart Range above 7500fT/Pike's Peak Between
7500 And 11000 Ft-Pikes Peak above 11000 Ft-
Canon City Vicinity/Eastern Fremont County-
Northern El Paso County/Monument Ridge/Rampart Range Below
7500 Ft-
Colorado Springs Vicinity/Southern El Paso County/Rampart Range
Below 7400 Ft-Pueblo Vicinity/Pueblo County Below 6300 Feet-
Walsenburg Vicinity/Upper Huerfano River Basin Below 7500 Ft-
Trinidad Vicinity/Western Las Animas County Below 7500 Ft-
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-
1108 AM MDT Sat Jul 15 2017

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

.DAY ONE...Today and Tonight

Scattered thunderstorms will develop across south central and
southeast Colorado this afternoon. The main storm risks today
will be lightning and heavy rain. The heavy rain will result
in a continued risk of flash flooding, particularly over the
burn scar areas, as storms will again be very slow moving. A few
of the stronger storms today may also produce wind gusts to 60
mph and hail up to the size of nickels. Thunderstorms will slowly
dissipate this evening, with most activity ending by or a little
past midnight.

.DAYS TWO THROUGH SEVEN...Sunday through Friday

The mountains and high valleys will see daily chances of afternoon
and evening thunderstorms into the end of next week. Drier conditions
are expected over the eastern plains Sunday through Wednesday although
isolated storms will continue. An uptick in storm activity can be
expected across the eastern plains later in the week as monsoon
moisture begins to work back into the region.

Lightning and locally heavy rain will be the main storm risks through
the week. This will include the risk of flash flooding generally
over and near recent burn scars. Gusty outflow winds of up to 50
mph and small hail will also be possible with some of the stronger
storms.

.SPOTTER INFORMATION STATEMENT...

Weather conditions that meet reporting criteria for spotters will be
possible this afternoon and evening across all of south central and
southeast Colorado.

50/50

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE PUEBLO CO
619 PM MDT SAT JUL 15 2017

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

0615 PM     FLASH FLOOD      EADS                    38.48N 102.79W
07/15/2017                   KIOWA              CO   PUBLIC

            FIRE DEPARTMENT IS BLOCKING AND OVERPASS AT
            THE INTERSECTION OF HWY 287 AND HWY 96, WITH
            2-3 FEET UNDER THE OVERPASS. EM FOR BENT
            COUNTY ALSO THAT COUNTY ROAD 40 ABOUT A HALF
            MILE SOUTH OF THE UNDERPASS LOCATION HAS A
            10 YARD WIDE SWATH WITH SEVERAL INCHES.
            STREET FLOODING IS ALSO BEING OBSERVED.

&&

Special Weather Statement
National Weather Service Pueblo CO
635 PM MDT SAT JUL 15 2017

COZ097>099-160115-
Springfield Vicinity/Baca County CO-Lamar Vicinity/Prowers County CO-
Las Animas Vicinity/Bent County CO-
635 PM MDT SAT JUL 15 2017

...SIGNIFICANT WEATHER ADVISORY FOR SOUTHWESTERN PROWERS...NORTHERN
BACA AND SOUTHEASTERN BENT COUNTIES UNTIL 715 PM MDT...

At 635 PM MDT, Doppler radar was tracking a strong thunderstorm 12
miles northwest of Two Buttes Reservoir, or 20 miles south of Lamar,
moving southeast at 25 mph.

Nickel size hail and wind gusts of 50 to 55 mph will be possible with
this storm.

This storm will remain over mainly rural areas of southwestern
Prowers...northern Baca and southeastern Bent Counties.

LAT...LON 3777 10282 3790 10272 3784 10251 3763 10260
TIME...MOT...LOC 0035Z 304DEG 20KT 3779 10271

Hodanish

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