Severe Thunderstorm Warning 174, NWS Denver/Boulder, CO

119 
WWUS55 KBOU 200030
SVSBOU

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE DENVER CO
630 PM MDT TUE JUL 19 2016

COC019-035-059-093-200045-
/O.CON.KBOU.SV.W.0174.000000T0000Z-160720T0045Z/
JEFFERSON CO-PARK CO-DOUGLAS CO-CLEAR CREEK CO-
630 PM MDT TUE JUL 19 2016

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 645 PM MDT
FOR CENTRAL JEFFERSON...NORTHEASTERN PARK...NORTH CENTRAL DOUGLAS AND
SOUTHEASTERN CLEAR CREEK COUNTIES...

AT 630 PM MDT...A SEVERE THUNDERSTORM WAS LOCATED NEAR TINY TOWN...OR
15 MILES SOUTHWEST OF DENVER...MOVING NORTHEAST AT 20 MPH.

HAZARD...60 MPH WIND GUSTS AND PENNY SIZE HAIL. 

SOURCE...RADAR INDICATED. 

IMPACT...EXPECT DAMAGE TO ROOFS...SIDING...AND TREES. 

LOCATIONS IMPACTED INCLUDE...
LAKEWOOD...WESTERN LITTLETON...SOUTHEASTERN WHEAT RIDGE...
SOUTHEASTERN GOLDEN...EVERGREEN...ROXBOROUGH PARK...MORRISON...
KITTREDGE...SOUTH PLATTE...IDLEDALE...BUFFALO CREEK...ASPEN PARK...
INDIAN HILLS...PINE JUNCTION...CONIFER...TINY TOWN...
CHATFIELD RESERVOIR...RED ROCKS PARK AND PINE.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

FOR YOUR PROTECTION MOVE TO AN INTERIOR ROOM ON THE LOWEST FLOOR OF A
BUILDING.

TORRENTIAL RAINFALL IS OCCURRING WITH THIS STORM...AND MAY LEAD TO
STREET FLOODING. DO NOT DRIVE YOUR VEHICLE THROUGH FLOODED ROADWAYS.

&&

LAT...LON 3957 10552 3977 10506 3968 10506 3967 10505
      3967 10507 3966 10508 3965 10506 3963 10511
      3963 10510 3962 10509 3961 10509 3962 10505
      3938 10504 3933 10541
TIME...MOT...LOC 0030Z 226DEG 16KT 3958 10518 

HAIL...0.75IN
WIND...60MPH
 
$$

COOPER

680 
WWUS55 KBOU 200040
SVSBOU

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE DENVER CO
640 PM MDT TUE JUL 19 2016

COC019-035-059-093-200050-
/O.EXP.KBOU.SV.W.0174.000000T0000Z-160720T0045Z/
JEFFERSON CO-PARK CO-DOUGLAS CO-CLEAR CREEK CO-
640 PM MDT TUE JUL 19 2016

...THE SEVERE THUNDERSTORM WARNING FOR CENTRAL JEFFERSON...
NORTHEASTERN PARK...NORTH CENTRAL DOUGLAS AND SOUTHEASTERN CLEAR
CREEK COUNTIES WILL EXPIRE AT 645 PM MDT...
        
THE STORM WHICH PROMPTED THE WARNING HAS MOVED OUT OF THE AREA.
THEREFORE THE WARNING WILL BE ALLOWED TO EXPIRE.  HOWEVER SMALL
HAIL... GUSTY WINDS AND HEAVY RAIN ARE STILL POSSIBLE WITH THIS
THUNDERSTORM.

TO REPORT SEVERE WEATHER...CONTACT YOUR NEAREST LAW ENFORCEMENT
AGENCY. THEY WILL RELAY YOUR REPORT TO THE NATIONAL WEATHER SERVICE
DENVER.

LAT...LON 3957 10552 3977 10506 3968 10506 3967 10505
      3967 10507 3966 10508 3965 10506 3963 10511
      3963 10510 3962 10509 3961 10509 3962 10505
      3938 10504 3933 10541
TIME...MOT...LOC 0038Z 240DEG 25KT 3958 10518 

$$

COOPER

Area Forecast Discussion
National Weather Service Denver/Boulder CO
349 PM MDT TUE JUL 19 2016

.SHORT TERM...(This evening through Wednesday)
Issued at 348 PM MDT Tue Jul 19 2016

Not much change for this evening's forecast as weak convection is
developing over and near the mountains in a low CAPE environment.
There have been a few puffs of convection on the plains that could
not sustain themselves. Still expecting a bit more activity out
there this evening, it may wait until some organized outflow or
some increase in the southerly flow this evening.

Light westerly flow aloft will continue on Wednesday, but there
will be a little less moisture. In addition, very warm
temperatures aloft (around -5C at 500 mb) will continue to limit
the depth and strength of convection. There should still be a fair
amount of showers and thunderstorms over the mountains, but weak.
For the plains the decreased moisture will mean things will be
more strongly capped. Still expecting a few storms but less than
today. Temperatures may be slightly warmer, but this will depend
on the timing of cloud cover developing.

.LONG TERM...(Wednesday night through Tuesday)
Issued at 348 PM MDT Tue Jul 19 2016

Models keep the upper high pressure centered southeast of the CWA
into Friday morning, with weak southwesterly flow aloft. By Friday
afternoon, the upper ridge shifts westward and flattens somewhat.
There is no synoptic scale energy progged for the CWA through the
period. The boundary layer flow is pretty normal through the
periods, but there is a weak cold front and some upslope indicated
Thursday. Models continue to show plenty of mid and upper level
moisture for the CWA through Friday night. Precipitable water
values are in the the 0.60 to 1.30 inch range all five periods.
There is pretty decent CAPE progged for the CWA through the
periods. There is some measurable rainfall over most of the CWA on
the QPF fields for all the late day periods. For pops, will use
persistence, with 40-50%s in the high country and 20-30%s over the
plains. For temperatures, Thursday's highs are 1-2 C warmer than
Wednesday's. Friday's highs are 1-2 C warmer again. For the later
days, Saturday through Tuesday, models have the upper ridge
flattening out, but there is still southwesterly flow aloft. Some
mid and upper level moisture is progged to continue into the
weekend but is dries out a bit Sunday and Monday.

&&

.AVIATION...(For the 18Z TAFS through 18Z Wednesday afternoon)
Issued at 348 PM MDT Tue Jul 19 2016

VFR conditions will prevail through Wednesday. Scattered
thunderstorms are expected in the Denver area during the late
afternoon, decreasing by 02z. Variable winds gusting to 30 knots
are the main threat with the storms. Cloud bases will generally be
high enough for visual approaches to KDEN, though the showers
could interrupt this for a couple of hours this afternoon.
Thunderstorms will be less numerous on the plains Wednesday
afternoon, with similar activity over the mountains.

&&

.BOU Watches/Warnings/Advisories...
None.
&&

SHORT TERM...Gimmestad
LONG TERM...RJK
AVIATION...Gimmestad

HAZARDOUS WEATHER OUTLOOK
NATIONAL WEATHER SERVICE DENVER/BOULDER CO
1058 AM MDT TUE JUL 19 2016

COZ030>051-201700-
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-
1058 AM MDT TUE JUL 19 2016

THIS HAZARDOUS WEATHER OUTLOOK IS FOR NORTHEAST AND NORTH CENTRAL
COLORADO.

.DAY ONE...TODAY AND TONIGHT

THERE WILL BE ANOTHER ROUND OF SHOWERS AND THUNDERSTORMS THIS
AFTERNOON INTO THE EARLY EVENING HOURS. A FEW OF THE STORMS OVER
THE PLAINS MAY PRODUCE FROM 1 TO 2 INCHES OF RAIN IN LESS THAN 45
MINUTES. AN ISOLATED SEVERE STORM MAY OCCUR AS WELL OVER THE
PLAINS WITH WIND GUSTS TO 60 MPH ALONG WITH ONE INCH HAIL.

.DAYS TWO THROUGH SEVEN...WEDNESDAY THROUGH MONDAY

THERE WILL BE A CHANCE OF LATE DAY SHOWERS AND THUNDERSTORMS OVER
THE MOUNTAINS AND FOOTHILLS THROUGH THE WEEKEND. THERE WILL A BE
A SLIGHT CHANCE OVER THE PLAINS.

.SPOTTER INFORMATION STATEMENT...

SPOTTER ACTIVATION WILL NOT BE NEEDED TODAY OR TONIGHT.

GIMMESTAD/RJK

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE DENVER CO
541 PM MDT TUE JUL 19 2016

COZ034-036-200015-
JEFFERSON AND WEST DOUGLAS COUNTIES ABOVE  6000 FEET/GILPIN/CLEAR
CREEK/NORTHEAST PARK COUNTIES BELOW 9000 FEET CO-
SOUTH AND SOUTHEAST GRAND/WEST CENTRAL AND SOUTHWEST
BOULDER/GILPIN/CLEAR CREEK/SUMMIT/NORTH AND WEST PARK COUNTIES ABOVE
9000 FEET CO-
541 PM MDT TUE JUL 19 2016

...SPECIAL WEATHER STATEMENT...

AT 537 PM MDT...DOPPLER RADAR WAS TRACKING A STRONG THUNDERSTORM 4
MILES SOUTHEAST OF PINECLIFFE...OR 24 MILES NORTHWEST OF DENVER...
MOVING NORTHEAST AT 20 MPH.

LOCALLY HEAVY RAINFALL AND WINDS IN EXCESS OF 30 MPH WILL BE
POSSIBLE WITH THESE STORMS.

LOCATIONS IMPACTED INCLUDE...
GOLDEN...EVERGREEN...IDAHO SPRINGS...CENTRAL CITY...MORRISON...
EMPIRE...BLACK HAWK...PINECLIFFE...WELLINGTON LAKE...ROLLINSVILLE...
BROOKVALE...TOLLAND...ASPEN SPRINGS...PINE JUNCTION...FLOYD HILL...
DUMONT...BERGEN PARK...CONIFER AND DECKERS.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

LOCALLY HEAVY RAINFALL IS ALSO EXPECTED...AND MAY LEAD TO LOCALIZED
FLOODING. DO NOT DRIVE YOUR VEHICLE THROUGH FLOODED ROADWAYS.

IF ON OR NEAR A LAKE...GET OUT OF THE WATER AND MOVE INDOORS OR
INSIDE A VEHICLE. REMEMBER...LIGHTNING CAN STRIKE OUT TO 10 MILES
FROM THE PARENT THUNDERSTORM. IF YOU CAN HEAR THUNDER...YOU ARE
CLOSE ENOUGH TO BE STRUCK BY LIGHTNING. MOVE TO SAFE SHELTER NOW! DO
NOT BE CAUGHT ON THE WATER IN A THUNDERSTORM.

&&

LAT...LON 3947 10566 3994 10569 3993 10540 3991 10539
      3992 10526 3977 10523 3975 10524 3974 10522
      3923 10512 3922 10533
TIME...MOT...LOC 2337Z 239DEG 49KT 3988 10538

COOPER