Frost Advisory 2, NWS Pueblo, CO

661 
WWUS75 KPUB 131446
NPWPUB

URGENT - WEATHER MESSAGE
National Weather Service Pueblo CO
846 AM MDT Sat Sep 13 2025

COZ070-071-132300-
/O.CON.KPUB.FR.Y.0002.250914T0900Z-250914T1500Z/
Alamosa  Vicinity/Central San Luis Valley Below 8500 Feet-
Southern San Luis Valley-
Including Fort Garland, Manassa, San Luis, Alamosa, La Jara,
Blanca, Sanford, Antonito, and Monte Vista
846 AM MDT Sat Sep 13 2025

...FROST ADVISORY REMAINS IN EFFECT FROM 3 AM TO 9 AM MDT SUNDAY...

* WHAT...Temperatures as low as 31 will result in frost formation.

* WHERE...Central San Luis Valley, and Southern San Luis Valley.

* WHEN...From 3 AM to 9 AM MDT Sunday.

* IMPACTS...Frost could harm sensitive outdoor vegetation. Sensitive 
  outdoor plants may be killed if left uncovered.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Take steps now to protect tender plants from the cold.

&&

$$

Visit us at http://www.weather.gov/pub

Hodanish

192 
WWUS75 KPUB 132012
NPWPUB

URGENT - WEATHER MESSAGE
National Weather Service Pueblo CO
212 PM MDT Sat Sep 13 2025

COZ070-071-140415-
/O.CON.KPUB.FR.Y.0002.250914T0900Z-250914T1500Z/
Alamosa  Vicinity/Central San Luis Valley Below 8500 Feet-
Southern San Luis Valley-
Including Fort Garland, Manassa, San Luis, Alamosa, La Jara,
Blanca, Sanford, Antonito, and Monte Vista
212 PM MDT Sat Sep 13 2025

...FROST ADVISORY REMAINS IN EFFECT FROM 3 AM TO 9 AM MDT SUNDAY...

* WHAT...Temperatures as low as 31 will result in frost formation.

* WHERE...Central San Luis Valley, and Southern San Luis Valley.

* WHEN...From 3 AM to 9 AM MDT Sunday.

* IMPACTS...Frost could harm sensitive outdoor vegetation. Sensitive 
  outdoor plants may be killed if left uncovered.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Take steps now to protect tender plants from the cold.

&&

$$

Visit us at http://www.weather.gov/pub

Hodanish

510 
WWUS75 KPUB 140348
NPWPUB

URGENT - WEATHER MESSAGE
National Weather Service Pueblo CO
948 PM MDT Sat Sep 13 2025

COZ070-071-141200-
/O.CON.KPUB.FR.Y.0002.250914T0900Z-250914T1500Z/
Alamosa  Vicinity/Central San Luis Valley Below 8500 Feet-
Southern San Luis Valley-
Including La Jara, Sanford, Blanca, San Luis, Monte Vista,
Manassa, Antonito, Fort Garland, and Alamosa
948 PM MDT Sat Sep 13 2025

...FROST ADVISORY REMAINS IN EFFECT FROM 3 AM TO 9 AM MDT SUNDAY...

* WHAT...Temperatures as low as 31 will result in frost formation.

* WHERE...Central San Luis Valley, and Southern San Luis Valley.

* WHEN...From 3 AM to 9 AM MDT Sunday.

* IMPACTS...Frost could harm sensitive outdoor vegetation. Sensitive 
  outdoor plants may be killed if left uncovered.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Take steps now to protect tender plants from the cold.

&&

$$

Visit us at http://www.weather.gov/pub

MG

496 
WWUS75 KPUB 140735
NPWPUB

URGENT - WEATHER MESSAGE
National Weather Service Pueblo CO
135 AM MDT Sun Sep 14 2025

COZ070-071-141545-
/O.NEW.KPUB.FR.Y.0003.250915T0900Z-250915T1500Z/
/O.CON.KPUB.FR.Y.0002.250914T0900Z-250914T1500Z/
Alamosa  Vicinity/Central San Luis Valley Below 8500 Feet-
Southern San Luis Valley-
Including La Jara, Sanford, Blanca, San Luis, Monte Vista,
Manassa, Antonito, Fort Garland, and Alamosa
135 AM MDT Sun Sep 14 2025

...FROST ADVISORY REMAINS IN EFFECT UNTIL 9 AM MDT THIS MORNING...
...FROST ADVISORY IN EFFECT FROM 3 AM TO 9 AM MDT MONDAY...

* WHAT...For the first Frost Advisory, temperatures as low as 31 
  will result in frost formation. For the second Frost Advisory, 
  temperatures as low as 34 will result in frost formation.

* WHERE...Central San Luis Valley, and Southern San Luis Valley.

* WHEN...For the first Frost Advisory, until 9 AM MDT this morning. 
  For the second Frost Advisory, from 3 AM to 9 AM MDT Monday.

* IMPACTS...Frost could harm sensitive outdoor vegetation. Sensitive 
  outdoor plants may be killed if left uncovered.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Take steps now to protect tender plants from the cold.

&&

$$

Visit us at http://www.weather.gov/pub

MG

205 
WWUS75 KPUB 141508
NPWPUB

URGENT - WEATHER MESSAGE
National Weather Service Pueblo CO
908 AM MDT Sun Sep 14 2025

COZ070-071-142315-
/O.EXP.KPUB.FR.Y.0002.000000T0000Z-250914T1500Z/
/O.CON.KPUB.FR.Y.0003.250915T0900Z-250915T1500Z/
Alamosa  Vicinity/Central San Luis Valley Below 8500 Feet-
Southern San Luis Valley-
Including Alamosa, Fort Garland, Blanca, La Jara, San Luis,
Antonito, Manassa, Sanford, and Monte Vista
908 AM MDT Sun Sep 14 2025

...FROST ADVISORY REMAINS IN EFFECT FROM 3 AM TO 9 AM MDT MONDAY...
...FROST WHICH WAS IN EFFECT FOR EARLIER THIS MORNING HAS EXPIRED...

* WHAT...Temperatures as low as 32 will result in frost formation.

* WHERE...Central San Luis Valley, and Southern San Luis Valley.

* WHEN...From 3 AM to 9 AM MDT Monday.

* IMPACTS...Frost could harm sensitive outdoor vegetation. Sensitive 
  outdoor plants may be killed if left uncovered.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Take steps now to protect tender plants from the cold.

&&

$$

Visit us at http://www.weather.gov/pub

Hodanish

Area Forecast Discussion
National Weather Service Pueblo CO
1139 PM MDT Fri Sep 12 2025

.KEY MESSAGES...

- Scattered strong storms continuing this evening, especially
  over the mountains.

- Better chance of strong storms over the
  Plains tomorrow afternoon, with some flash flooding possible.

- Scattered frost possible San Luis Valley tomorrow night and
  Sunday night.

&&

.SHORT TERM /THROUGH SATURDAY/...
Issued at 220 PM MDT Fri Sep 12 2025

Currently...

Early this afternoon scattered showers and thunderstorms were note
along the divide, with strong to severe storms noted along the CO/UT
border. All of this activity was moving northeast within the flow
regime of a rather impressive trough which was located over the
western CONUS and was progressing slowly east.

Rest of this afternoon...

Main concern will be the potential for strong storms and localized
heavy rain along the CONTDVD and the San Luis Valley and the Upper
Arkansas River Valley. Shear is quite strong and some cape is noted,
and storms so far have looked fairly impressive. This area will have
to be monitored for severe potential. Flash flooding looks less of a
threat as storms are moving rather quickly, but if storm begin to
train or get anchored over the higher terrain, the the flash
flooding risk will increase.

As for areas farther east, the threat of strong storm activity is
much less this afternoon as shear is weak and CAPE is also low.
Nonetheless, showers and storms will be possible along the S mtns
and the greater I-25 corridor region, especially later this
afternoon and into the evening.

For tonight, with the trough continuing to progress over the area,
the chances of showers and isolated storms will continue over the
higher terrain, although coverage will decrease.

For tomorrow, A marginal risk for severe storms will is expected
mainly over the plains as temps aloft will cool off as the trough
moves overhead and there will be some flow over the plains. Deep
shear will not be an issue tomorrow although the hodographs dont
look overly impressive. Additionally, CAPE is noted, but values area
generally generally around 1000 Joules. With the trough axis still
over western CO (and it becoming somewhat negatively tilted with
time), strong synoptic ascent will be over the our fcst area during
prime heating. Additionally, with plenty of moisture lingering
region-wide, a marginal risk of flash flooding will continue over
entire forecast area.

As for temps tomorrow, it will be noticeably cooler, with temps
running about ~8 degrees cooler on the plains as compared to todays
max temps, while mtn/valley temps will be 2 to 6F cooler. Precip
over the mtns will likely be less in coverage tomorrow as compared
to today.

Tomorrow night we may see some frost in the San Luis Valley.
\/Hodanish

&&

.LONG TERM /SATURDAY NIGHT THROUGH FRIDAY/...
Issued at 539 PM MDT Fri Sep 12 2025

\Issued at 300 AM MDT Fri Sep 12 2025

Sunday and Monday..

Our flow aloft transitions from northwesterly Sunday morning to
due westerly/zonal by Sunday evening, and southwesterly by
Monday as our next low forms up over the northern Rockies. Near
normal temperatures and dry conditions are expected for Sunday,
with only very isolated convection expected over the Pikes Peak
region and area generally north of Highway 50. Our temperatures
warm a few degrees on Monday, with highs climbing just a few
degrees warmer than normal. Monday looks to be the driest day of
the period, with little to no chances for showers and
thunderstorms at any location across the region. Though we will
be warmer and drier, winds will be too weak to warrant any fire
weather concerns, and rh values look to remain above critical
levels as well.

Tuesday Onwards..

There is still some measure of disagreement in regards to the
northern Rockies Low that models bring in around mid-week. EPS
ensemble members are slightly more amplified and GFS ensemble
members are slightly more progressive. Either way, it seems that the
system will mainly pass to our north, and this will occur somewhere
around the late Tuesday into early Wednesday timeframe. This will
allow for renewed shower and thunderstorm chances for at least
Tuesday through Thursday, along with a bit of a cool down for
Wednesday and Thursday as well. After this system's passage, models
hint at ridging building in from Friday into next weekend.

&&

.AVIATION /06Z TAFS THROUGH 06Z SUNDAY/...
Issued at 1139 PM MDT Fri Sep 12 2025

VFR cigs and scattered showers will persist into early Sunday morning,
and will carry a vcsh mention at KCOS/KPUB until around 08z before
showers dissipate. At KALS, vcsh the entire night and through 18z
Sunday, as waves of weak energy rotate northward through the region.
Another round of convection will develop Sunday over the mountains
as early as 15z-18z, with prob30 for -tsra at KALS after 18z, then
starting at KCOS and KPUB after 19z. Gusts to 35 plus kts the main
storm threats, perhaps some brief heavier rainfall and lower cigs/vis
at KALS, where moisture and lift will be slightly better. Will end
storm chances at 00z as drier air moves into the region, though
a few CAMs show some activity lingering along and north of the
Palmer Divide until 03z-05z as main upper low lifts northward.

&&

.PUB WATCHES/WARNINGS/ADVISORIES...
None.

&&

SHORT TERM...HODANISH/MW
LONG TERM...
AVIATION...PETERSEN

Hazardous Weather Outlook
National Weather Service Pueblo CO
1015 PM MDT Fri Sep 12 2025

COZ058>089-093>099-140415-
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-
1015 PM MDT Fri Sep 12 2025

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

.DAY ONE...Tonight

Scattered showers and isolated thunderstorms will continue through
the night, mainly over the mountains and along I-25. The primary
threats from any storms overnight will be lightning and briefly
gusty winds to 45 mph.

.DAYS TWO THROUGH SEVEN...Saturday through Thursday

Showers and thunderstorms will continue Saturday, some of which
may be severe across our southeast plains. For the southeast
plains, large hail up to 1 inch in diameter, 60 mph winds, and
heavy rain will all be possible on Saturday. Showers and
thunderstorms decrease drastically in coverage and intensity for
Sunday and Monday, and return to the forecast by mid-week for most
locations.

Patchy frost will also be possible across portions of the San
Luis Valley on Sunday and Monday morning.

.SPOTTER INFORMATION STATEMENT...

Weather spotters will not be needed tonight.

10/EHR