Severe Thunderstorm Warning 62, NWS Denver/Boulder, CO

108 
WWUS55 KBOU 292252
SVSBOU

Severe Weather Statement
National Weather Service Denver CO
452 PM MDT THU JUN 29 2017

COC073-292315-
/O.CON.KBOU.SV.W.0062.000000T0000Z-170629T2315Z/
Lincoln CO-
452 PM MDT THU JUN 29 2017

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 515 PM MDT
FOR SOUTHEASTERN LINCOLN COUNTY...

At 452 PM MDT, a severe thunderstorm was located near Punkin Center,
or 26 miles south of Limon, moving southeast at 20 mph.

HAZARD...Quarter size hail. 

SOURCE...Trained weather spotters. 

IMPACT...Damage to vehicles is expected. 

Locations impacted include...
Punkin Center and Karval. 

PRECAUTIONARY/PREPAREDNESS ACTIONS...

For your protection move to an interior room on the lowest floor of a
building.

&&

LAT...LON 3886 10382 3887 10372 3898 10372 3895 10326
      3866 10344
TIME...MOT...LOC 2252Z 301DEG 19KT 3888 10365 

HAIL...1.00IN
WIND...<50MPH
 
$$

SCHLATTER

456 
WWUS55 KBOU 292316
SVSBOU

Severe Weather Statement
National Weather Service Denver CO
516 PM MDT THU JUN 29 2017

COC073-292325-
/O.EXP.KBOU.SV.W.0062.000000T0000Z-170629T2315Z/
Lincoln CO-
516 PM MDT THU JUN 29 2017

...THE SEVERE THUNDERSTORM WARNING FOR SOUTHEASTERN LINCOLN COUNTY
HAS EXPIRED...
                
The storm which prompted the warning has weakened below severe
limits, and no longer poses an immediate threat to life or property.
Therefore the warning has been allowed to expire.  However, hail to 
the size of pennies is still possible with this thunderstorm.

A severe thunderstorm watch remains in effect until 900 PM MDT for
east central Colorado.

LAT...LON 3886 10382 3887 10372 3898 10372 3895 10326
      3866 10344
TIME...MOT...LOC 2315Z 286DEG 31KT 3883 10341 

$$

SCHLATTER

Area Forecast Discussion
National Weather Service Denver/Boulder CO
338 PM MDT Thu Jun 29 2017

.SHORT TERM...(This evening through Friday)
Issued at 338 PM MDT Thu Jun 29 2017

Strong thunderstorm development has occurred on the Palmer Divide
this afternoon with hail up to golf ball size in Lincoln County.
Weaker and more high based thunderstorm activity has been moving
over Larimer and Weld Counties with more gusty winds than rain.
Northern Colorado remains under cyclonic westerly flow aloft with
an embedded short wave trough aloft that will move out of the
mountains later tonight. HRRR model runs have been showing a band
of storms moving out over the urban corridor after 9 PM. These
storms should produce more rainfall than this afternoon's high
based storms. After that area of storms moves through, moist
upslope flow will continue through tomorrow morning. Stratus and
low clouds are expected to develop along with areas of drizzle,
especially near the foothills. Cooler conditions will prevail
through tomorrow, but soundings show the afternoon airmass will
begin to de-stabilize with CAPE values between 700 and 1300 j/kg.
The NAM shows an upper trough moving over northeast Colorado in
the afternoon as the upper air pattern amplifies over Idaho and
Nevada. A round of thunderstorms may develop early in the
afternoon and then sweep eastward as drier air begins moving in
from the west. Upper level jet dynamics from a departing jet may
also help to organize the afternoon thunderstorm activity. Cooler
temperatures will be the other stroy of the day with high
temperatures on the plains only in the lower to mid 70s.

.LONG TERM...(Friday night through Thursday)
Issued at 338 PM MDT Thu Jun 29 2017

Upper level high pressure building over the Rocky Mountain Region
will bring dry and warmer weather to north central and northeastern
Colorado over the weekend. There may be just enough moisture to
produce isolated late afternoon and early evening showers and
thunderstorms...mainly over the mountains and Palmer Divide on
Saturday.

On Sunday...a slight increase in mid level moisture may result in a
few more showers and storms across north central and northeastern
Colorado. Inverted V soundings suggest that the storms will be
high based with little rain and gusty winds. However...higher
dewpoints along the eastern border...combined with an upper level
disturbance...may result in a few stronger storms across the far
northeastern zones during the late afternoon and evening hours.

On Monday...models shows a short wave trough and associated cold
front moving across northeastern Colorado. A stable airmass behind
the front should limit precipitation chances across much of the
plains. However...greater instability across far eastern sections of
the state...combined with lift from the shortwave may result in a
better chance for storms in those areas.

A large upper level ridge of high pressure is forecasted to rebuild
over the Rocky Mountain Region from Tuesday through Thursday...which
should bring mostly dry weather along with warmer temperatures
temperatures to all of north central and northeastern Colorado.

&&

.AVIATION...(For the 18Z TAFS through 18Z Friday afternoon)
Issued at 338 PM MDT Thu Jun 29 2017

Isolated to scattered showers and thunderstorms are forming over
the foothills and moving eastward across the urban corridor. The
strongest storms are expected to remain well southeast of KDEN.
Gusty winds and light rain are all that is expected from any
afternoon storms that move through. Another round of thunderstorms
is expected to move out of the mountains after sunset. Showers
with moderate rain and gusty winds are expected between 9 PM and
midnight. After the late night round of showers, winds will remain
out of the northeast, pooling a moist airmass against the
foothills. Areas of low clouds are expected to form with light
rain or drizzle developing towards sunrise. Ceilings could drop
below 1000 feet for a short time along with visibilities down to 3
miles or so. Cloudy and cooler conditions are expected to prevail
through the day. The afternoon may see enough warming for the
airmass to de-stabilize with another round of thunderstorms
possible.

&&

.BOU WATCHES/WARNINGS/ADVISORIES...
None.
&&

SHORT TERM...Dankers
LONG TERM...Kalina
AVIATION...Dankers

Hazardous Weather Outlook
National Weather Service Denver/Boulder CO
1107 AM MDT Thu Jun 29 2017

COZ030>051-301715-
Jackson County Below 9000 Feet-
West Jackson and West Grand Counties Above 9000 Feet-
Grand and Summit Counties Below 9000 Feet-
South and East Jackson/Larimer/North and Northeast Grand/
Northwest Boulder Counties Above 9000 Feet-
South and Southeast Grand/West Central and Southwest Boulder/
Gilpin/Clear Creek/Summit/North and West Park Counties Above
9000 Feet-Larimer and Boulder Counties Between 6000 and 9000 Feet-
Jefferson and West Douglas Counties Above 6000 Feet/Gilpin/Clear
Creek/Northeast Park Counties Below 9000 Feet-
Central and Southeast Park County-
Larimer County Below 6000 Feet/Northwest Weld County-
Boulder And Jefferson Counties Below 6000 Feet/West Broomfield
County-
North Douglas County Below 6000 Feet/Denver/West Adams and
Arapahoe Counties/East Broomfield County-
Elbert/Central and East Douglas Counties Above 6000 Feet-
Northeast Weld County-Central and South Weld County-Morgan County-
Central and East Adams and Arapahoe Counties-
North and Northeast Elbert County Below 6000 Feet/North Lincoln
County-
Southeast Elbert County Below 6000 Feet/South Lincoln County-
Logan County-Washington County-Sedgwick County-Phillips County-
1107 AM MDT Thu Jun 29 2017

This hazardous weather outlook is for northeast and north central
Colorado.

.DAY ONE...This Afternoon and Tonight

Isolated thunderstorms are expected this afternoon and evening,
mainly over the plains. A few storms could become severe over the
eastern Palmer Divide region during the mid and late afternoon
with damaging wind gusts to 60 mph and hail up to one inch in
diameter.

An approaching upper level disturbance and cold front late this
evening will bring a better chance of showers and thunderstorms
tonight to the Front Range foothills and northeast plains. These
storms will produce more rainfall, and may produce hail up to one
inch in diameter.

.DAYS TWO THROUGH SEVEN...Friday through Wednesday

The chance for showers and thunderstorms will increase on Friday
with a weak storm system moving across the state. The showery
upslope precipitation east of the mountains will be accompanied
by noticeably cooler temperatures. Precipitation amounts should
be on the light side. Over the weekend, storm chances will
decrease with a high pressure ridge building in from the Desert
Southwest. Look for a slight uptick in thunderstorm activity and a
slight dip in temperatures on Monday with another weak upper air
disturbance passing over the area. Warmer and drier weather will
then return to the outlook area for Independence Day and Wednesday
beneath a strong ridge of high pressure.

.SPOTTER INFORMATION STATEMENT...

Spotter activation may be required across Elbert, Lincoln, and
southern Washington counties after 2 pm this afternoon.

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE DENVER CO
242 PM MDT THU JUN 29 2017

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

0155 PM     HAIL             8 NW SIMLA              39.22N 104.19W
06/29/2017  M1.00 INCH       ELBERT             CO   TRAINED SPOTTER

&&

KF

PRELIMINARY LOCAL STORM REPORT...SUMMARY
NATIONAL WEATHER SERVICE DENVER CO
254 PM MDT THU JUN 29 2017

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

0248 PM     HAIL             5 W PUNKIN CENTER       38.85N 103.79W
06/29/2017  M1.75 INCH       LINCOLN            CO   STORM CHASER

0155 PM     HAIL             8 NW SIMLA              39.22N 104.19W
06/29/2017  M1.00 INCH       ELBERT             CO   TRAINED SPOTTER

&&

KF

PRELIMINARY LOCAL STORM REPORT...SUMMARY
NATIONAL WEATHER SERVICE DENVER CO
334 PM MDT THU JUN 29 2017

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

0327 PM     HAIL             7 SW KARVAL             38.66N 103.62W
06/29/2017  M1.75 INCH       LINCOLN            CO   TRAINED SPOTTER

0248 PM     HAIL             5 W PUNKIN CENTER       38.85N 103.79W
06/29/2017  M1.75 INCH       LINCOLN            CO   STORM CHASER

0155 PM     HAIL             8 NW SIMLA              39.22N 104.19W
06/29/2017  M1.00 INCH       ELBERT             CO   TRAINED SPOTTER

&&

KF

PRELIMINARY LOCAL STORM REPORT...SUMMARY
NATIONAL WEATHER SERVICE DENVER CO
358 PM MDT THU JUN 29 2017

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

0327 PM     HAIL             7 SW KARVAL             38.66N 103.62W
06/29/2017  M1.75 INCH       LINCOLN            CO   TRAINED SPOTTER

0325 PM     HAIL             5 SSE ELBERT            39.15N 104.49W
06/29/2017  M0.88 INCH       ELBERT             CO   COCORAHS

0248 PM     HAIL             5 W PUNKIN CENTER       38.85N 103.79W
06/29/2017  M1.75 INCH       LINCOLN            CO   STORM CHASER

0155 PM     HAIL             8 NW SIMLA              39.22N 104.19W
06/29/2017  M1.00 INCH       ELBERT             CO   TRAINED SPOTTER

&&

KF