Severe Thunderstorm Warning 81, NWS Denver/Boulder, CO

110 
WWUS55 KBOU 082059
SVSBOU

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE DENVER CO
259 PM MDT SUN JUN 8 2014

COC001-005-121-082115-
/O.CON.KBOU.SV.W.0081.000000T0000Z-140608T2115Z/
ARAPAHOE CO-WASHINGTON CO-ADAMS CO-
259 PM MDT SUN JUN 8 2014

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 315 PM MDT
FOR EASTERN ARAPAHOE...SOUTHWESTERN WASHINGTON AND SOUTHEASTERN ADAMS
COUNTIES...

AT 258 PM MDT...A SEVERE THUNDERSTORM WAS LOCATED 6 MILES WEST OF
LAST CHANCE...OR 30 MILES NORTH OF LIMON...MOVING EAST AT 30 MPH.

HAZARD...70 MPH WIND GUSTS AND PENNY SIZE HAIL. 

SOURCE...RADAR INDICATED. 

IMPACT...EXPECT CONSIDERABLE TREE DAMAGE. DAMAGE IS LIKELY TO MOBILE 
         HOMES...ROOFS AND OUTBUILDINGS. 

LOCATIONS IMPACTED INCLUDE...
LAST CHANCE AND COTTONWOOD VALLEY. 

PRECAUTIONARY/PREPAREDNESS ACTIONS...

REMAIN ALERT FOR A POSSIBLE TORNADO! TORNADOES CAN DEVELOP QUICKLY
FROM SEVERE THUNDERSTORMS. IF YOU SPOT A TORNADO GO AT ONCE INTO THE
BASEMENT OR SMALL CENTRAL ROOM IN A STURDY STRUCTURE.

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

&&

A TORNADO WATCH REMAINS IN EFFECT UNTIL 800 PM MDT SUNDAY EVENING FOR
NORTHEAST COLORADO.

LAT...LON 3957 10390 3983 10387 3983 10357 3957 10354
TIME...MOT...LOC 2058Z 268DEG 26KT 3970 10370 

TORNADO...POSSIBLE
HAIL...0.75IN
WIND...70MPH

$$

RPK

AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE DENVER/BOULDER CO
1105 AM MDT SUN JUN 8 2014

.UPDATE...
ISSUED AT 1105 AM MDT SUN JUN 8 2014

WITH A PRETTY PESSIMISTIC FORECAST ALREADY ON THE BOOKS...WILL NOT
BE MAKING ANY CHANGES AT THIS POINT. THE UPPER LEVEL SHORT WAVE IS
MOVING OVER WESTERN COLORADO AT THE PRESENT TIME...KICKING OFF A
FEW THUNDERSTORMS OVER SUMMIT AND GRAND COUNTIES ON ITS LEADING
EDGE. EXPECT SHOWER ACTIVITY TO CONTINUE INCREASING OVER THE NEXT
FEW HOURS AND SPREAD ONTO THE PLAINS DURING THE AFTERNOON. ACROSS
THE PLAINS...MOIST SOUTHEAST WINDS HAVE DEVELOPED IN RESPONSE TO
THE DEVELOPING SURFACE LOW ALONG THE LEE OF THE ROCKIES. CLOUD
COVER HAS REDUCED SOLAR HEATING SOMEWHAT UP TO THIS POINT...BUT
VISIBLE SATELLITE IMAGERY SHOWS AN AREA OF CLEARING OVER
PARK...TELLER AND DOUGLAS COUNTIES THAT WILL MOVE OUT OVER THE
PALMER DIVIDE IN THE NEXT COUPLE HOURS. THIS WILL ALLOW FOR STRONG
HEATING ON THE PALMER DIVIDE...ENHANCING THERMAL GRADIENTS TO THE
NORTH OF THAT AREA. SPC HAS US IN UNDER A SLIGHT RISK OF SEVERE
THUNDERSTORMS WHICH SEEMS WARRENTED DUE TO DYNAMICS ALOFT AND
INCREASING SOUTHEASTERLY FLOW AT LOW LEVELS. THE HRRR AND RUC
MODEL RUNS ARE SHOWING A BACK EDGE TO ALL THE SHOWER ACTIVITY
MOVING OUT OF THE FOOTHILLS AND ONTO THE PLAINS BETWEEN 8 PM AND
10 PM THIS EVENING AND THEN TO THE NORTHEAST CORNER OF THE STATE
BY MIDNIGHT. AFTER THAT CONDITIONS WILL BE DRY AND BREEZY...BUT
UNTIL THEN IT COULD BE A QUITE ACTIVE AFTERNOON.

&&

.SHORT TERM...(TODAY THROUGH TONIGHT )
ISSUED AT 120 AM MDT SUN JUN 8 2014

11-3.9 SATELLITE LOW CLOUD IMAGERY SHOWING A CLEARING OF THE STRATUS
DECK OVER THE DENVER AREA AND POINTS SOUTH THROUGH DOUGLAS COUNTY.
GIVEN THE DENVER CYCLONE COULD RESULT IN SOME FOG DEVELOP OVER
WESTERN AND NORTH SECTIONS OF DENVER. DURING THE MORNING HOURS
LOW CLOUDS CLEARING FROM WEST TO EAST IN ADVANCE OF THE UPPER
TROF.

WATER VAPOR IMAGERY SHOWING UPPER LEVEL TROF OVER IDAHO AND NEVADA
AND MOVING SOUTHEAST TOWARDS COLORADO. THIS TROF WILL MOVE ACROSS
COLORADO THIS AFTERNOON AND TONIGHT WITH MODEST AMOUNTS OF UPWARD
ASCENT AS NOTED ON QG LAYERED PRODUCTS. ASSOCIATED COLD FRONT WILL
ALSO PUSH SOUTHWARD OVER THE NORTHEAST PLAINS THIS AFTERNOON WHICH
WILL INITIATE CONVERGENCE WITH SOUTHEAST LOW LEVEL FLOW AHEAD OF
THE FRONT.

NAM/RAP SHOWING SURFACE BASED CAPES OF 1000-1500J/KG OVER THE
NORTHEAST PLAINS. GIVEN MODERATE UPWARD ASCENT COULD BE SOME
SEVERE STORMS THIS AFTERNOON AND EVENING. EXPECT LARGE HAIL AND
DAMAGING WINDS WITH THE STRONGER STORMS. CAN'T RULE OUT A TORNADO
AS WELL ESPECIALLY ALONG THE FRONTAL CONVERGENCE WITH THE
SOUTHEAST FLOW AHEAD OF THE FRONT. STORMS WILL END FROM WEST TO
EAST THIS EVENING AND OVERNIGHT AS THE TROF MOVES ACROSS COLORADO.

.LONG TERM...(MONDAY THROUGH SATURDAY)
ISSUED AT 120 AM MDT SUN JUN 8 2014

IT WILL BE DRY...STABLE AND COOLER ON MONDAY...WITH THE TROUGH
AXIS SHIFTS TO THE EAST OF COLORADO IN THE MORNING...WITH AN UPPER
LEVEL RIDGE PROGGED TO SHIFT OVER THE STATE IN THE AFTERNOON. AS A
RESULT...NO THUNDERSTORMS ARE EXPECTED FOR MONDAY AFTERNOON AND
EVENING. ON TUESDAY...TEMPERATURES WILL START TO REBOUND WITH
HIGHS IN THE LOWER 80S. THE UPPER RIDGE AXIS WILL BE OVER EASTERN
COLORADO...WITH ENOUGH MID LEVEL MOISTURE OVER THE MOUNTAINS FOR A
SLIGHT CHANCE OF AFTN AND EVENING TSTMS. THE FLOW ALOFT WILL
BECOME MORE ZONAL TUESDAY NIGHT...AHEAD OF ANOTHER SYSTEM MOVING
INTO THE NORTHERN ROCKIES. WEDNESDAY AND WEDNESDAY NIGHT...THE
RIDGE AXIS WL GET SUPPRESSED TO THE SOUTH AS THE SYSTEM MOVES
ACROSS MONTANA. A COLD FRONT ASSOCIATED WITH THIS SYSTEM IS
PROGGED TO PUSH INTO NORTHEASTERN COLORADO BY WEDNESDAY AFTERNOON.
THERE SHOULD BE SOME INCREASE IN MID LEVEL MOISTURE AS LOW LEVEL
MOISTURE PROGGED TO INCREASE ACROSS THE NERN PLAINS...AS LOW LEVEL
ELY WINDS ADVECT IT INTO THE CWFA. FOR NOW SLGT CHANCE WILL
SUFFICE BUT THIS WILL ENCOMPASS MUCH OF THE FORECAST AREA. THE
BEST CHANCE WILL BE NEAR THE FOOTHILLS AND PALMER DIVIDE...ALONG
AND AHEAD OF THE FRONTAL BOUNDARY. FOR THURSDAY AND THURSDAY
NIGHT...THE SFC HIGH WILL SHIFT TO THE EAST BUT WILL LEAVE LOW
LEVEL MOISTURE SETTLED OVER NERN CO IN ITS WAKE. A WEAK SYSTEM
EMBEDDED IN THE WESTERLY FLOW ALOFT COULD MOVE ACROSS NRN COLORADO
IN THE AFTN/EVENING PERIOD. AS A RESULT...COULD AGAIN SEE A ROUND
OF THUNDERSTORMS. A DRIER WSWLY FLOW IS PROGGED FOR FRIDAY AND
SATURDAY. OVERALL WL GO WITH SLGT CHANCE OF TSTMS EACH AFTN/EVNG
FOR WEDNESDAY THROUGH FRIDAY. AFTER SOME MILD COOLING ON
THURSDAY..TEMPERATURES CLIMBING BACK ABOVE NORMAL FOR FRIDAY AND
SATURDAY.

&&

.AVIATION...(FOR THE TAFS THROUGH 18Z MONDAY MORNING)
ISSUED AT 1105 AM MDT SUN JUN 8 2014

WILL CARRY THUNDERSTORMS IN THE DENVER AREA TAFS FROM 19Z THROUGH
ABOUT 02Z. WIND FIELD OVER DENVER AREA IS COMPLICATED WITH
SOUTHERLY FLOW EAST OF THE AIRPORT AND NORTHWESTERLIES CLOSER TO
THE FOOTHILLS. LOOKS LIKE KDEN SHOULD STAY OUT OF THE NORTHWEST
UNTIL OUTFLOW FROM SHOWERS MOVING OFF THE FOOTHILLS PUSHES THINGS
MORE TO THE WEST. NORTHERLY WINDS ARE EXPECTED BEHIND THE COLD
FRONT PUSHING DOWN THE FRONT RANGE LATE IN THE AFTERNOON. CLEARING
IS EXPECTED AFTER ABOUT 03Z AS THE UPPER DISTURBANCE MOVES ACROSS
THE NORTHEAST PLAINS.

&&

.HYDROLOGY...
ISSUED AT 120 AM MDT SUN JUN 8 2014

MOST LOCATIONS SHOULD SEE SOME RAIN AND STORMS THIS AFTERNOON
WHICH COULD SHOW SOME SMALL RISES ON CREEKS AND STREAMS. STORMS
WILL BE MOVING WITH MODEST STEERING FLOWS. MODEL QPF SHOWING
.25-.50 OF AN INCH OVER FRONT RANGE AND ADJ PLAINS WITH UPWARDS OF
AN INCH OVER THE FAR EASTERN PLAINS AND PALMER DIVIDE.

COOLER TEMPERATURES ON MONDAY MAY CONTINUE TO MODERATE THE
SNOWMELT IN THE MOUNTAINS. SHOWERS ARE AGAIN EXPECTED TO HAVE
EASTWARD MOVEMENT...KEEPING THE RUNOFF IN CHECK. WARMER
TEMPERATURES EXPECTED ON TUESDAY...WITH EVEN WARMER HIGHS FOR
FRIDAY AND SATURDAY. AS A RESULT...THE SNOWMELT WILL LIKELY AGAIN
INCREASE.

CURRENT ADVISORIES AND THE FLOOD WARNING IN GREELEY WILL REMAIN
IN EFFECT FOR THE NEXT SEVERAL DAYS.

&&

.BOU WATCHES/WARNINGS/ADVISORIES...
NONE.
&&

UPDATE...DANKERS
SHORT TERM...ENTREKIN
LONG TERM...COOPER
AVIATION...DANKERS
HYDROLOGY...COOPER/ENTREKIN

HAZARDOUS WEATHER OUTLOOK
NATIONAL WEATHER SERVICE DENVER/BOULDER CO
1111 AM MDT SUN JUN 8 2014

COZ030>051-091715-
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-
1111 AM MDT SUN JUN 8 2014

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

.DAY ONE...TODAY AND TONIGHT

AN UPPER LEVEL WEATHER DISTURBANCE AND A COLD FRONT WILL MOVE
ACROSS NORTHERN COLORADO THIS AFTERNOON AND EVENING. SHOWERS AND
THUNDERSTORMS WILL CONTINUE DEVELOPING OVER THE MOUNTAINS THROUGH
EARLY AFTERNOON AND SPREAD OVER THE PLAINS DURING THE AFTERNOON
AND EVENING. SOME STORMS ON THE PLAINS MAY BECOME SEVERE WITH
LARGE HAIL UP TO 2 INCHES IN DIAMETER...DAMAGING WINDS AND
ISOLATED TORNADOES. THE STRONGEST STORMS MAY BE OVER THE PALMER
DIVIDE REGION WHERE SOME SUNNIER SKIES ARE EXPECTED FOR A COUPLE
HOURS EARLY IN THE AFTERNOON.

SHOWERS AND STORMS WILL END FROM WEST TO EAST BY MID-EVENING WITH
CLEARING SKIES OVERNIGHT.

.DAYS TWO THROUGH SEVEN...MONDAY THROUGH SATURDAY

TEMPERATURES REMAIN COOLER ON MONDAY...WITH WARMER WEATHER
RETURNING TUESDAY THROUGH FRIDAY. THUNDERSTORMS WILL BE SOMEWHAT
LIMITED MONDAY AND TUESDAY...BUT WILL RETURN TO MUCH OF THE AREA
WEDNESDAY AND THURSDAY. THE BEST CHANCE OF THUNDERSTORMS MAY OCCUR
WEDNESDAY AND WEDNESDAY NIGHT...WHEN ANOTHER DISTURBANCE MOVES
ACROSS NORTHERN COLORADO.

.SPOTTER INFORMATION STATEMENT...

SPOTTER ACTIVATION MAY BE NEEDED AFTER 1 PM ACROSS THE NORTHEAST
PLAINS OF COLORADO.

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE DENVER CO
1209 PM MDT SUN JUN 08 2014

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

1115 AM     TORNADO          3 NE FAIRPLAY           39.25N 105.96W
06/08/2014                   PARK               CO   LAW ENFORCEMENT

            APPROXIMATE 5 MINUTE TOUCHDOWN IN OPEN COUNTRY WITH
            DAMAGE TO ROOF OF A STRUCTURE. NO INJURIES REPORTED.

&&

KFREDIN

PRELIMINARY LOCAL STORM REPORT...SUMMARY
NATIONAL WEATHER SERVICE DENVER CO
1259 PM MDT SUN JUN 08 2014

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

1254 PM     TORNADO          2 S GROVER              40.84N 104.23W
06/08/2014                   WELD               CO   TRAINED SPOTTER

            NO REPORTS OF DAMAGE.

1240 PM     HAIL             CENTENNIAL              39.60N 104.87W
06/08/2014  M1.00 INCH       ARAPAHOE           CO   NWS EMPLOYEE

1232 PM     TORNADO          3 W LAKE GEORGE         38.98N 105.43W
06/08/2014                   PARK               CO   LAW ENFORCEMENT

            NO REPORTS OF DAMAGE.

1115 AM     TORNADO          3 NE FAIRPLAY           39.25N 105.96W
06/08/2014                   PARK               CO   LAW ENFORCEMENT

            APPROXIMATE 5 MINUTE TOUCHDOWN IN OPEN COUNTRY WITH
            DAMAGE TO ROOF OF A STRUCTURE. NO INJURIES REPORTED.

&&

KFREDIN

PRELIMINARY LOCAL STORM REPORT...CORRECTED
NATIONAL WEATHER SERVICE DENVER CO
153 PM MDT SUN JUN 08 2014

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

0124 PM     HAIL             CASTLE ROCK             39.38N 104.85W
06/08/2014  M1.25 INCH       DOUGLAS            CO   AMATEUR RADIO

1254 PM     TORNADO          2 S GROVER              40.84N 104.23W
06/08/2014                   WELD               CO   TRAINED SPOTTER

            NO REPORTS OF DAMAGE.

1243 PM     HAIL             AURORA                  39.70N 104.81W
06/08/2014  M1.00 INCH       ARAPAHOE           CO   TRAINED SPOTTER

1240 PM     HAIL             CENTENNIAL              39.60N 104.87W
06/08/2014  M1.00 INCH       ARAPAHOE           CO   NWS EMPLOYEE

1232 PM     TORNADO          3 W LAKE GEORGE         38.98N 105.43W
06/08/2014                   PARK               CO   LAW ENFORCEMENT

            NO REPORTS OF DAMAGE.

1115 AM     TORNADO          3 NE FAIRPLAY           39.25N 105.96W
06/08/2014                   PARK               CO   LAW ENFORCEMENT

            APPROXIMATE 5 MINUTE TOUCHDOWN IN OPEN COUNTRY WITH
            DAMAGE TO ROOF OF A STRUCTURE. NO INJURIES REPORTED.

&&

KFREDIN

PRELIMINARY LOCAL STORM REPORT...SUMMARY
NATIONAL WEATHER SERVICE DENVER CO
217 PM MDT SUN JUN 08 2014

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

0124 PM     HAIL             CASTLE ROCK             39.38N 104.85W
06/08/2014  M1.25 INCH       DOUGLAS            CO   AMATEUR RADIO

1258 PM     TORNADO          AURORA                  39.70N 104.81W
06/08/2014                   ARAPAHOE           CO   AMATEUR RADIO

            DAMAGE TO CONSTRUCTION TRAILER WITH POSSIBLE INJURIES IN
            THE VICINITY.

1254 PM     TORNADO          2 S GROVER              40.84N 104.23W
06/08/2014                   WELD               CO   TRAINED SPOTTER

            NO REPORTS OF DAMAGE.

1243 PM     HAIL             AURORA                  39.70N 104.81W
06/08/2014  M1.00 INCH       ARAPAHOE           CO   TRAINED SPOTTER

1240 PM     HAIL             CENTENNIAL              39.60N 104.87W
06/08/2014  M1.00 INCH       ARAPAHOE           CO   NWS EMPLOYEE

1232 PM     TORNADO          3 W LAKE GEORGE         38.98N 105.43W
06/08/2014                   PARK               CO   LAW ENFORCEMENT

            NO REPORTS OF DAMAGE.

1115 AM     TORNADO          3 NE FAIRPLAY           39.25N 105.96W
06/08/2014                   PARK               CO   LAW ENFORCEMENT

            APPROXIMATE 5 MINUTE TOUCHDOWN IN OPEN COUNTRY WITH
            DAMAGE TO ROOF OF A STRUCTURE. NO INJURIES REPORTED.

&&

KFREDIN