Special Weather Statement, NWS Pueblo, CO

Area Forecast Discussion
National Weather Service Pueblo CO
311 PM MDT WED JUN 29 2016

.SHORT TERM...(This evening through Thursday)
Issued at 309 PM MDT Wed Jun 29 2016

Convection developing over the mountains again this afternoon as
moisture gradually increases, with a few storms along the I-25
corridor as of 21z. Expect storms to continue over the high terrain
and interior valleys into early evening, and with a few models
suggesting at least isolated -shra/-tsra persisting past midnight,
will keep low pops in place through early Thursday morning. Over the
I-25 corridor and eastern plains, mountain convection will gradually
spread eastward toward lower elevations, with mesoscale models
suggesting some new development out toward the KS border after 22z,
though they have been way overdone with lower elevation storms so
far this afternoon. Plenty of CAPE in place over the plains with
values in the 1500-2500 j/kg range, so an isolated severe storm is
possible, even with rather weak 0-6km shear.  Earlier thinking was
some sort of MCS would roll southward through the plains late
evening and overnight, but latest hi-res models have shifted best
forcing eastward into Neb/Nrn KS, as low level jet is rather slow to
increase over the high plains.

On Thursday, old frontal boundary sags back south through the area,
reaching the NM border by late afternoon. Deepening low level
upslope behind the front and a continued influx of mid-level
moisture from the south will lead to widespread convection across
the area, with storms developing fairly early in the day as
instability increases quickly area-wide. Convection will also be
aided by weak short wave moving through the region and cooling
temps aloft. Marginal severe threat remains in place over the
plains, though again deep layer shear is only around 30 kts, which
may limit storm strength/severity. Threat for heavy rain will ramp
up through the day, especially east of I-25 as 60f plus dewpoint
advect westward behind the front. Clouds and precip will hold max
temps down somewhat, with plains staying below 90f for a change.

.LONG TERM...(Thursday night through Wednesday)
Issued at 309 PM MDT Wed Jun 29 2016

...Active weather Thursday night through Saturday...

Upper level disturbances combined with a fledgling monsoon will keep
the threat of some severe weather and flooding going through at least
the first half of the weekend.

Thursday evening...could be the most critical part of the long-term
forecast. Pattern does not look extreme, but there are enough
ingredients in place to raise some concerns for potential flooding.
At the surface, moderate easterly or upslope flow in place. Winds
aloft will be relatively weak. Flow aloft strengthens a bit through
the evening, which will help move convection to the east, but there
could be several rounds or waves of convection moving through, which
will increase the threat of heavy rain falling on saturated ground.
Instability will be sufficient for moderate to heavy rain, with CAPE
ranging from 1-2K j/kg over the Plains. A couple of short wave
disturbances will help maintain convection through Thu evening and
overnight. Precip H2O values look in the 1.5 inch range for portions
of the plains, or about double the average. Bottom line...potential
for heavy rain is there and will have to keep an eye out for
mesoscale trend through Thu night.

Friday...Still the threat of heavy rain, but severe parameters are
elevated as well. Mid-level flow strengthens ahead of approaching
short wave trough over the 4 Corners region. Severe potential looks
highest over the Palmer dvd and far SE Plains late in the afternoon
and through Fri evening. With CAPE approaching 2000 J/kg over the
Plains and bulk sheers 40-50 kts, depending on evolution of
Convection Thu nite-Fri morning could see a risk of some severe
storms this day. Temps remain a bit below average with widespread
cloud cover and areas of precip along with upslope flow over the
Plains.

By Saturday, the short wave should be passing through Ern CO in the
morning or early afternoon. If the timing is a bit slower, could see
a repeat threat of heavy rain and/or svr wx Sat afternoon, but if
the system moves through quickly we could see a faster cut-off in
the heavy rain and svr threats. Either way, still looks like temps
will remain below average, generally in the 80s for the lowe
elevations and 60s-70s for the high country.

From Sunday and beyond, some poor consistency in the models. Earlier
runs of the GFS had a return to hot and less moist conditions with
the upper high building strongly over NM and the Desert SW. Latest
GFS is starting to trend closer to the EC...which maintains the
current weak monsoonal patter over the SW and Central Rockies. With
the uncertainties, will keep the forecast closest to the Ensemble
blends. Rose

&&

.AVIATION...(For the 00Z TAFS through 00Z Thursday evening)
Issued at 309 PM MDT Wed Jun 29 2016

Isolated tsra possible all taf sites into the early evening, as slow
moving storms drift away from the higher terrain. Will carry a vcts
mention all terminals until 02Z-03z, with storms pushing eastward
onto the plains by late evening. Overnight, terminals should remain
VFR, though some patchy stratus will be possible on the plains to
the east of KPUB and KCOS, while a few -tsra linger over the
mountains past 06z. On Thursday, expect tsra to be more widespread
across the region, with storms developing before 18z over the
mountains and spreading across lower elevations in the afternoon.
With more moisture available, expect cloud bases to be lower with
storms Thu afternoon, and periods of MVFR/IFR look possible with
stronger convection.

&&

.PUB Watches/Warnings/Advisories...
NONE.
&&

SHORT TERM...PETERSEN
LONG TERM...ROSE
AVIATION...PETERSEN

HAZARDOUS WEATHER OUTLOOK
NATIONAL WEATHER SERVICE PUEBLO CO
1156 AM MDT WED JUN 29 2016

COZ058>089-093>099-301800-
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-
1156 AM MDT WED JUN 29 2016

THIS HAZARDOUS WEATHER OUTLOOK IS FOR PORTIONS OF CENTRAL...EAST
CENTRAL...SOUTH CENTRAL AND SOUTHEAST COLORADO.

.DAY ONE...THIS AFTERNOON AND TONIGHT

ISOLATED TO SCATTERED THUNDERSTORMS WILL DEVELOP OVER THE MOUNTAINS
EARLY THIS AFTERNOON...THEN SPREAD ACROSS THE PLAINS FROM MID-
AFTERNOON INTO THE EVENING. THUNDERSTORMS ACROSS THE MOUNTAINS
AND I-25 CORRIDOR TODAY WILL BE CAPABLE OF PRODUCING
LIGHTNING...LOCALLY HEAVY RAINFALL...AND ERRATIC GUSTY WINDS UP TO
50 MPH. AS STORMS MOVE INTO THE PLAINS...ONE OR TWO COULD BECOME
SEVERE...PRODUCING HAIL TO AROUND 1 INCH IN DIAMETER...AND WIND
GUSTS OVER 60 MPH. THE MOST LIKELY AREA FOR SEVERE THUNDERSTORMS
WILL BE ACROSS KIOWA...BENT...AND PROWERS COUNTIES. LOCALLY HEAVY
RAINFALL ON ALREADY SATURATED SOILS COULD QUICKLY RESULT IN FLASH
FLOODING.

.DAYS TWO THROUGH SEVEN...THURSDAY THROUGH TUESDAY

ISOLATED TO SCATTERED THUNDERSTORMS ARE ANTICIPATED EACH DAY WITH
THE GREATEST COVERAGE OF STORMS FROM THURSDAY INTO SATURDAY.
SMALL HAIL...LOCALLY HEAVY RAINFALL...WIND GUSTS TO AROUND 50 MPH
AND LIGHTNING WILL BE POSSIBLE WITH THUNDERSTORMS DURING THIS
PERIOD. IN ADDITION...THE POTENTIAL EXISTS FOR A FEW STRONG TO
SEVERE THUNDERSTORMS...PRIMARILY OVER THE EASTERN PLAINS FROM
THURSDAY INTO SATURDAY WHERE THE STRONGER STORMS WILL BE CAPABLE
OF PRODUCING HAIL AROUND 1 INCH IN DIAMETER AND WIND GUSTS OVER 60
MPH. ALSO...INCREASING POTENTIAL FOR HEAVY RAINFALL IS ANTICIPATED
FROM THURSDAY INTO SATURDAY WITH FLASH FLOODING POSSIBLE ON AREA
BURN SCARS AND IN URBAN AREAS WHICH TAKE A DIRECT HIT FROM THE
STRONGER STORMS.

.SPOTTER INFORMATION STATEMENT...

WEATHER CONDITIONS THAT MEET REPORTING CRITERIA FOR SPOTTERS WILL BE
POSSIBLE THIS AFTERNOON AND EVENING ACROSS THE SOUTHEAST PLAINS.

10/77

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SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE PUEBLO CO
441 PM MDT WED JUN 29 2016

COZ094-099-292315-
EASTERN LAS ANIMAS COUNTY CO-SPRINGFIELD VICINITY/BACA COUNTY CO-
441 PM MDT WED JUN 29 2016

...SIGNIFICANT WEATHER ADVISORY FOR EAST CENTRAL LAS ANIMAS AND WEST
CENTRAL BACA COUNTIES UNTIL 515 PM MDT...

AT 440 PM MDT...DOPPLER RADAR WAS TRACKING A STRONG THUNDERSTORM OVER
KIM...OR 42 MILES NORTHEAST OF DES MOINES...MOVING EAST AT 25 MPH.

DIME SIZE HAIL AND WIND GUSTS UP TO 50 MPH WILL BE POSSIBLE WITH THIS
STORM.

LOCATIONS IMPACTED INCLUDE...
KIM.

LAT...LON 3712 10340 3730 10349 3754 10311 3720 10292
TIME...MOT...LOC 2240Z 248DEG 26KT 3725 10337

MW

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE PUEBLO CO
501 PM MDT WED JUN 29 2016

COZ084-085-292330-
COLORADO SPRINGS VICINITY/SOUTHERN EL PASO COUNTY/RAMPART RANGE BELOW
7400 FT CO-
NORTHERN EL PASO COUNTY/MONUMENT RIDGE/RAMPART RANGE BELOW 7500 FT
CO-
501 PM MDT WED JUN 29 2016

...SIGNIFICANT WEATHER ADVISORY FOR EAST CENTRAL EL PASO COUNTY UNTIL
530 PM MDT...

AT 501 PM MDT...DOPPLER RADAR WAS TRACKING A STRONG THUNDERSTORM NEAR
RUSH...OR 32 MILES SOUTHWEST OF LIMON...MOVING SOUTHEAST AT 15 MPH.

BRIEF HEAVY RAIN...DIME SIZE HAIL AND WINDS IN EXCESS OF 40 MPH WILL
BE POSSIBLE WITH THIS STORM.

LOCATIONS IMPACTED INCLUDE...
RUSH.

LAT...LON 3894 10405 3894 10406 3871 10406 3889 10425
      3903 10413 3903 10406
TIME...MOT...LOC 2301Z 306DEG 12KT 3892 10411

MW