Alert archive / Colorado / Areal Flood Advisories in 2017

Areal Flood Advisory 2, NWS Pueblo, CO

April 12, 2017Bent County, Prowers County, Colorado

NWS Pueblo, CO issued this areal flood advisory at Apr 12, 2017, 5:46 PM MDT for Bent County, Prowers County, Colorado. It was in force for 3 hr.

The area

The counties it named.

The facts

Issued
Apr 12, 2017, 5:46 PM MDT (23:46 UTC)
Expired
Apr 12, 2017, 8:45 PM MDT
In force
3 hr
Issued by
NWS Pueblo, CO
Area
Storm-based polygon

Counties Bent County, CO, Prowers County, CO

The radar

The Pueblo radar (KPUX), 138 km from the middle of the area, began a volume at 23:49 UTC, the scan nearest the moment this went out.

Open the radar archive at this moment

The archived warnings, watches and discussions in force at that minute are drawn over the scan, this one among them.

The nearest sounding before it

Dodge City, (KDDC), launched 12:00Z, 11.8 hours before the alert went out and 249 km from the middle of its area. This is the routine balloon launch nearest before it, the air the forecaster had in hand, not a measurement taken for the alert.

Skew-T log-pSkew-T log-p diagram, Dodge City, at 12:00Z on 2017-04-12Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 0 joules per kilogram.LCL10008507005003002001001 km2 km3 km6 km9 km12 km15 km-30°-20°-10°0°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Dodge City, at 12:00Z on 2017-04-12The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 215 square meters per square second.19395878Sfc1 km3 km6 km9 kmRMLM
The wind turning with height, colored by layer: ground to 1 km, 1 to 3 km, 3 to 6 km, 6 to 10 km.
Mixed-layer CAPE
0 J/kg
Mixed-layer CIN
No buoyant parcel
Mixed-layer LCL
2330 m above ground
0-6 km bulk shear
32 kt
0-1 km storm-relative helicity
215 m²/s²
0-3 km storm-relative helicity
260 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.0

Open this sounding in Storm Lab

What forecasters said that day

The local office's own words before this areal flood advisory went out, as it sent them, from the Iowa Environmental Mesonet's archive of National Weather Service text.

NWS Pueblo, CO wrote its last area forecast discussion before this areal flood advisory went out at Apr 12, 3:03 PM MDT, 2 hours 43 minutes earlier.

Area forecast discussion, Apr 12, 3:03 PM MDT, 2 hours 43 minutes before
Area Forecast Discussion
National Weather Service Pueblo CO
303 PM MDT Wed Apr 12 2017

.SHORT TERM...(This evening through Thursday)
Issued at 243 PM MDT Wed Apr 12 2017

Currently...

Moisture has returned to parts of the CWA as dwpts over the far
eastern plains were in the 40s to around 50F. All other areas were
still quite dry, with dewpts in the teens and 20s. An isolated
thunderstorm was located in the vicinity of Trinidad. Temps were in
the 70s across a majority of the plains with 50s and 60s in the
valleys. It was quite breezy east of the sfc trough over the far
eastern plains.

Rest of today...

Best chance of thunder through the rest of the afternoon will be
along and east of the surface trough which will extend from roughly
Lamar to east of Trinidad. A storm or two could be strong with gusty
winds and small hail. The best chance of stronger storms according
to hi res guidance will be over far eastern Baca and far eastern
Prowers counties.

Over the remainder of the region it will be dry.

Tonight...

There still will be a very low chance of some isold thunder over the
far eastern plains, especially this evening. We may also see some
low clouds this region along with patchy areas of fog as winds will
pick up a bit from the east across most of the plains during the
early morning hours, and this will increase the RH over a good part
of the lower elevations.

Temps tonight will be in the 40s most if not all of the plains with
20s and 30s over  the higher elevation's.

Tomorrow...

Another warm and mainly dry day is anticipated tomorrow across the
area, although it will feel much less dry as we should see dwpts in
the  30s and 40s across the region during the mid day hour. We will
see a continued chance of isold tsra over the plains, especially the
far eastern plains. One or two of these storms could produce gusty
winds and small hail. There will also be a very low chance of a
-TSRA over the mtns adjacent to the plains.  Temps will be continue
to be warm with 70s plains, although it will be 2-3F cooler than
today.

Breezy southeast winds should prevail across the lower elevations
tomorrow, with southeasterlies in the mtns and valleys. \/Hodanish

.LONG TERM...(Thursday night through Wednesday)
Issued at 243 PM MDT Wed Apr 12 2017

There is quite a bit of uncertainty in the extended period due to
high ensemble spreads and differences with embedded waves in zonal
flow.

Thursday night...a departing upper level shortwave trough is
forecast to eject out of western Kansas into Nebraska overnight.
Models do develop isolated thunderstorms over the far Eastern
Plains during the evening, before moving off to the east and
dissipating by midnight. Modest shear and instability may allow
for small hail and gusty winds. Once storms move off to the east,
expect quiet conditions into Friday morning.

Friday...broad southwesterly flow is forecast to spread across
Colorado on Friday. Gusty southwest winds and drier air will
likely lead to elevated fire weather conditions across the Plains
for the afternoon hours. Currently, fuels will be in question
given the wet conditions over the past few weeks, but fine fuels
may dry out quickly leading to more critical fire weather
concerns. Temperatures will be warm across the region with lower
80s for highs.

Saturday through Monday...westerly flow aloft will spread across
the region with several embedded disturbances expected through
early next week. There are time and strength questions, with
reduced forecast confidence during this period. On Saturday, a
cold front will drop south across the Plains during the morning
hours. This will help to cool temperatures back into the lower to
mid 70s. Afternoon highs will slowly warm back into the lower 80s
by Monday. As for precipitation, much will depend on how the
disturbances will track. Weak instability over the mountains will
likely lead to afternoon and evening showers, with possibly some
movement into the adjacent plains. As for the far Eastern Plains,
much will depend on boundaries that set up near the Kansas border.
Monday will need to be watched for elevated fire weather
conditions during the afternoon hours.

Tuesday and Wednesday...models in agreement with a more robust
upper disturbance moving across the area. This will likely bring
better chances for rain and high elevation snow to the mountains,
especially Tuesday. Across the Plains, there may be slightly
better chances for precipitation as the disturbance passes. Fire
weather concerns may also be elevated Tuesday afternoon.  Mozley

&&

.AVIATION...(For the 00Z TAFS through 00Z Thursday evening)
Issued at 243 PM MDT Wed Apr 12 2017

Anticipate VFR conditions during the next 24 hours at all 3 taf
sites; KPUB, KALS and KCOS. There is a very low chance of some low
cigs and possibly some fog as RH values will be increasing, but
believe chance is too low to mention explicitly in the TAFs. Diurnal
winds will prevail tomorrow...but they will likely be about 4 to 7
knots stronger than normal.

&&

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

SHORT TERM...HODANISH
LONG TERM...MOZLEY
AVIATION...HODANISH
Hazardous weather outlook, Apr 12, 5:58 AM MDT, 11 hours 48 minutes before
Hazardous Weather Outlook
National Weather Service Pueblo CO
558 AM MDT Wed Apr 12 2017

COZ058>089-093>099-131200-
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-
558 AM MDT Wed Apr 12 2017

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

.DAY ONE...Today and Tonight

Isolated thunderstorms will be possible over the far
southeast plains late this afternoon and this evening. The primary
threat from most storms will be lightning, with one or two stronger
storms producing wind gusts to 50 mph and hail up to the size of
pennies.

.DAYS TWO THROUGH SEVEN...Thursday through Tuesday

Isolated thunderstorms at times will be possible over primarily
eastern sections from Thursday into Monday. The main thunderstorm
threats from the stronger storms will be lightning and wind gusts
around 55 mph. In addition, some of the more intense storms will
be capable of producing periods of heavy precipitation and hail.
Also, some light accumulating snow is expected to develop over
portions of the Continental Divide by later Tuesday.

.SPOTTER INFORMATION STATEMENT...

Weather conditions that meet reporting criteria for spotters will be
possible this afternoon and evening over the far southeast
plains.

In the hours before

Special weather statement, Apr 12, 2:17 PM MDT, 3 hours 29 minutes before
Special Weather Statement
National Weather Service Pueblo CO
217 PM MDT WED APR 12 2017

COZ074-088-122100-
Southern Sangre De Cristo Mountains Between 7500 and 11000 Ft CO-
Trinidad Vicinity/Western Las Animas County Below 7500 Ft CO-
217 PM MDT WED APR 12 2017

...SIGNIFICANT WEATHER ADVISORY FOR SOUTH CENTRAL LAS ANIMAS COUNTY
UNTIL 300 PM MDT...

At 216 PM MDT, Doppler radar was tracking a strong thunderstorm over
Trinidad. This storm was nearly stationary.

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

Locations impacted include...
Trinidad, Starkville and Hoehne.

LAT...LON 3704 10455 3722 10460 3731 10436 3704 10429
TIME...MOT...LOC 2016Z 257DEG 3KT 3715 10449

Hodanish
Special weather statement, Apr 12, 2:42 PM MDT, 3 hours 4 minutes before
Special Weather Statement
National Weather Service Pueblo CO
242 PM MDT WED APR 12 2017

COZ074-088-122145-
Southern Sangre De Cristo Mountains Between 7500 and 11000 Ft CO-
Trinidad Vicinity/Western Las Animas County Below 7500 Ft CO-
242 PM MDT WED APR 12 2017

...SIGNIFICANT WEATHER ADVISORY FOR SOUTH CENTRAL LAS ANIMAS COUNTY
UNTIL 345 PM MDT...

At 241 PM MDT, Doppler radar was tracking a strong thunderstorm over
Starkville, or near Trinidad. This storm was nearly stationary.

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

Locations impacted include...
Trinidad, Cokedale and Starkville.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Torrential rainfall is also occurring with this storm, and may lead
to localized flooding. Do not drive your vehicle through flooded
roadways.

Frequent cloud to ground lightning is occurring with this storm.
Lightning can strike 10 miles away from a thunderstorm. Seek a safe
shelter inside a building or vehicle.

&&

LAT...LON 3704 10457 3715 10469 3725 10452 3711 10446
TIME...MOT...LOC 2041Z 142DEG 1KT 3714 10456

lw
Special weather statement, Apr 12, 4:19 PM MDT, 1 hour 27 minutes before
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Special weather statement, Apr 12, 4:49 PM MDT, 57 minutes before
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    <section class="card" role="status" aria-live="polite">
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      <h1 id="headline">This service is currently unavailable.</h1>
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        The site you requested is temporarily down for maintenance or an unexpected outage.
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      <p id="message2">
        Please try again in a few minutes.
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The office that day

Everything else NWS Pueblo, CO issued on the same UTC day.

IssuedProductOfficeCountiesLasted
Apr 12, 2:17 PM MDTSpecial Weather StatementPUBLas Animas43 min
Apr 12, 2:42 PM MDTSpecial Weather StatementPUBLas Animas63 min
Apr 12, 4:19 PM MDTSpecial Weather StatementPUBProwers41 min
Apr 12, 4:49 PM MDTSpecial Weather StatementPUBBent26 min
Apr 12, 5:48 PM MDTAreal Flood AdvisoryPUBLas Animas3 hr

Nearby

Areal Flood Advisories in Colorado, 2017Every areal flood advisory in 2017

Sources

The product and its follow-ups from the Iowa Environmental Mesonet's archive of National Weather Service and Storm Prediction Center text; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.