Severe Thunderstorm Warning 6, NWS Denver/Boulder, CO

847 
WWUS55 KBOU 270124
SVSBOU

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE DENVER CO
724 PM MDT THU APR 26 2012

COC075-270200-
/O.CON.KBOU.SV.W.0006.000000T0000Z-120427T0200Z/
LOGAN CO-
724 PM MDT THU APR 26 2012

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 800 PM MDT
FOR CENTRAL LOGAN COUNTY...

AT 724 PM MDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
SEVERE THUNDERSTORM CAPABLE OF PRODUCING ONE INCH DIAMETER HAIL...AND
DAMAGING WINDS UP TO ABOUT 60 MPH.  THIS STORM WAS LOCATED 4 MILES
SOUTHEAST OF NORTH STERLING RESERVOIR...OR 7 MILES NORTH OF
STERLING...MOVING NORTHEAST AT 35 MPH.

LOCATIONS REMAINING IN THE WARNING INCLUDE BUT ARE NOT LIMITED TO
PADRONI...NORTH STERLING RESERVOIR AND ILIFF.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

IF SEVERE WEATHER APPROACHES YOUR AREA...GO INSIDE A STURDY SHELTER
AWAY FROM CREEK BEDS AND OTHER FLOOD-PRONE AREAS. REMEMBER...A SEVERE
THUNDERSTORM CAN PRODUCE LARGE DAMAGING HAIL...DAMAGING WINDS IN
EXCESS OF 58 MPH...DEADLY LIGHTNING...AND VERY HEAVY RAIN.

&&

LAT...LON 4067 10332 4072 10336 4078 10337 4095 10311
      4069 10299
TIME...MOT...LOC 0124Z 234DEG 30KT 4074 10322
WIND...HAIL 60MPH 1.00IN

$$

945 
WWUS55 KBOU 270151
SVSBOU

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE DENVER CO
751 PM MDT THU APR 26 2012

COC075-270201-
/O.EXP.KBOU.SV.W.0006.000000T0000Z-120427T0200Z/
LOGAN CO-
751 PM MDT THU APR 26 2012

...THE SEVERE THUNDERSTORM WARNING FOR CENTRAL LOGAN COUNTY WILL
EXPIRE AT 800 PM MDT...

THE THUNDERSTORM THAT PROMPTED THE WARNING HAS WEAKENED AND IS NO
LONGER EXPECTED TO PRODUCE SEVERE WEATHER.

LAT...LON 4067 10332 4072 10336 4078 10337 4095 10311
      4069 10299
TIME...MOT...LOC 0151Z 234DEG 30KT 4087 10298

$$

AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE DENVER CO
356 PM MDT THU APR 26 2012

.SHORT TERM...DECENT BATCH OF SHOWERS ALONG WITH SCATTERED STORMS
BEGINNING TO SPREAD INTO MOUNTAINS ASSOCIATED WITH DECENT
SHORTWAVE AND QG ASCENT NEAR FOUR CORNERS. ACROSS PLAINS...ONLY
CONVECTION OF NOTE DEVELOPED ALONG BOUNDARY JUST EAST OF DENVER
AREA AND IS CURRENTLY MOVING OVER MORGAN AND WELD COUNTIES HEADING
NORTHEAST. WAVE STILL EXPECTED TO MOVE NORTHEAST ACROSS THE AREA
DURING THE EVENING...SHOULD SEE MOUNTAIN ACTIVITY INCREASE. WILL
CONTINUE WITH THE LIKELY POPS THERE ALONG SOME EVENING STORMS.
AFTER MIDNIGHT...UPPER TROUGH STILL EXPECTED TO PASS OVER AREA. AS
TEMPERATURES CONTINUE TO DROP...SHOULD SEE RAIN TO CHANGE TO SNOW
WITH SOME ACCUMULATION EXPECTED ALONG THE HIGHER MOUNTAIN PASSES BY
MORNING. ACROSS PLAINS...STILL EXPECTING THUNDERSTORMS TO INCREASE
IN COVERAGE AS WAVE MOVES OVERHEAD WITH THE BEST CHANCE EAST AND
NORTH OF DENVER IN AREA OF BETTER MOISTURE AND WIND SHEAR. RUC
SHOWS BEST CAPES EAST OF A FORT MORGAN TO LIMON LINE THROUGH 03Z
WITH VALUES OF 1500 TO NEAR 2000 J/KG. STILL SOME CHANCE FOR A FEW
SEVERE STORMS EARLY THIS EVENING WITH LARGE HAIL AND DAMAGING WIND.
COULD ALSO BE A BRIEF TORNADO DUE TO THE SHEAR. CAPES DECREASE
AFTER 03Z SO SEVERE THREAT DECREASES. OVERALL...CURRENT POPS STILL
LOOK ON TRACK...MADE SOME ADJUSTMENTS NEAR THE WYOMING BORDER.
WOULD EXPECT ACTIVITY TO DECREASE AFTER MIDNIGHT FROM THE
SOUTHWEST WITH SOME THUNDER STILL POSSIBLE FAR NORTHEAST CORNER.
ON FRIDAY...UPPER TROUGH TO MOVE QUICKLY ACROSS AREA WITH DRIER
SUBSIDENT AIRMASS IN ITS WAKE. CROSS SECTIONS STILL SHOW DECENT
MOISTURE OVER MOUNTAINS DURING THE MORNING BEFORE DECEEASING BY
AFTERNOON. STILL DECENT CHANCE FOR SNOW SHOWERS OVER
MOUNTAINS...MAINLY WEST AND NORTH FACING SLOPES. ACROSS
PLAINS...STILL SOME WRAP AROUND MOISTURE FAR NORTHEAST CORNER
EARLY AFTERNOON AND ADDED A SLIGHT CHANCE OF SHOWERS THERE.
OTHERWISE...DRY CONDITIONS EXPECTED BY AFTERNOON. NORTHWEST WINDS
TO BE ON THE INCREASE DURING THE MORNING AS TROUGH EXITS AREA. DID
INCREASE WINDS SLIGHTLY ACROSS PLAINS. AIRMASS TO BE COOLER.

.LONG TERM...COLORADO WILL REMAIN UNDER A MODERATE WESTERLY FLOW
ALOFT THROUGH MUCH OF THE FORECAST PERIOD AS AN UPPER LOW STALLS
OVER THE NORTHERN PLAINS. INITIALLY...DRY AIR WILL BE IN PLACE
OVER THE STATE IN THE SUBSIDENT REGION BEHIND TONIGHT/S PASSING
SHORT WAVE TROUGH. DRY AIR WILL BE LEFT OVER COLORADO AS MOISTURE
ACROSS THE WESTERN U.S. THIS AFTERNOON IS DRAWN TOWARD THE MAIN
UPPER TROUGH OVER THE NORTHERN ROCKIES. THROUGH THE REST OF THE
WEEKEND...DRY AIR FROM THE SOUTHWESTERN U.S. WILL BE MOVING ACROSS
THE REGION. BY SUNDAY NIGHT THOUGH...MODELS ARE INDICATING THE
RETURN OF SOME MOISTURE OVER THE EASTERN PLAINS. THIS SEEMS
PLAUSIBLE AS SURFACE RIDGING BUILDS OVER THE GREAT LAKES REGION
AND NORTHEAST U.S...INDUCING SOUTHERN FLOW ACROSS THE SOUTHERN
PLAINS. AS THE MOISTURE MOVES OVER WESTERN KANSAS AND THE EASTERN
COLORADO BORDER...DIURNAL HEATING COULD BE ENOUGH TO TRIGGER
AFTERNOON SHOWER ACTIVITY. SUNDAY EVENING AND MONDAY LOOK LIKE THE
PERIODS WITH THE HIGHEST CHANCES FOR SHOWERS. LATER IN THE WEEK...
ANOTHER SURGE OF MOISTURE IS EXPECTED OVER THE EASTERN PLAINS.
TEMPERATURES ACROSS THE FORECAST AREA ARE NOW EXPECTED TO RAPIDLY
REBOUND FROM SUNDAY ONWARD...DUE TO THE WESTERLY FLOW ALOFT
CONTINUING THROUGH THE PERIOD. TEMPERATURES NEXT WEEK LOOK LIKE
THEY WILL BE WELL ABOVE NORMAL AS THE ZONAL FLOW PATTERN REMAINS
IN PLACE.

&&

.AVIATION...WEAK BOUNDARY SOUTH AND EAST OF DENVER AT PRESENT WITH
SOME SHOWERS REDEVELOPING ALONG LINE. A FEW STORMS POSSIBLE
THROUGH 00Z AT DEN AND APA. NEXT BATCH OF SHOWERS AND STORMS
MOVING ACROSS MOUNTAINS...SHOULD SEE ACTIVITY ACROSS DENVER AREA
AFTER 00Z AND TEMPO TSRA STILL LOOKING ON TRACK THROUGH 04Z. VFR
CONDITIONS TO PREVAIL WITH CEILINGS AROUND 7000 FEET AGL POSSIBLE.
DRY CONDITIONS TO PREVAIL AFTER 06Z WITH SURFACE WINDS SHIFTING TO
THE NORTHWEST. COULD SEE SOME GUSTS TO 25 KTS...MAINLY FROM 09Z-15Z.

&&

.HYDROLOGY...OCCASIONAL SHOWERS ALONG WITH EVENING THUNDERSTORMS
EXPECTED ACROSS MOUNTAINS AND FOOTHILLS TONIGHT. STORMS STILL
CAPABLE OF RAINFALL AMOUNTS UP TO A QUARTER OF AN INCH THIS
EVENING. HOWEVER FLOODING IS NOT ANTICIPATED.

&&

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

SHORT TERM...D-L
LONG TERM....DANKERS
AVIATION...D-L

HAZARDOUS WEATHER OUTLOOK
NATIONAL WEATHER SERVICE DENVER CO
1128 AM MDT THU APR 26 2012

COZ030>051-271730-
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-
1125 AM MDT THU APR 26 2012

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

.DAY ONE...THIS AFTERNOON AND TONIGHT

SCATTERED THUNDERSTORMS WILL DEVELOP ACROSS THE MOUNTAINS EARLY
THIS AFTERNOON AND MOVE EAST OVER THE PLAINS OF NORTHEAST COLORADO
DURING THE REMAINDER OF THE AFTERNOON. SOME OF THESE STORMS MAY
PRODUCE SMALL HAIL...WIND GUSTS TO AROUND 45 MPH...DEADLY CLOUD-
TO-GROUND LIGHTNING AND BRIEF HEAVY RAINFALL. ANOTHER ROUND OF
SHOWERS AND THUNDERSTORMS IS EXPECTED TO FORM ACROSS THE AREA
DURING THE EVENING. A FEW STORMS EAST OF A FORT MORGAN TO LIMON
LINE MAY TURN SEVERE THIS EVENING...WITH LARGE HAIL AND DAMAGING
WINDS THE MAIN THREAT. THE WIND SHEAR OVER FAR EASTERN COLORADO
WILL BE FAVORABLE FOR THE DEVELOPMENT OF A BRIEF TORNADO OR TWO.
COLDER TEMPERATURES ARE EXPECTED IN THE HIGH COUNTRY OVERNIGHT
WITH RAIN CHANGING TO SNOW ROUGHLY ABOVE 9000 FEET WHERE 1 TO 3
INCHES OF SNOW MAY ACCUMULATE BY MORNING.

.DAYS TWO THROUGH SEVEN...FRIDAY THROUGH WEDNESDAY

GUSTY WEST TO NORTHWEST WINDS WILL DEVELOP DURING THE DAY ON
FRIDAY AS THE STORM SYSTEM MOVES ACROSS NORTHEAST COLORADO. SPEEDS
OF 20 TO 30 MPH WITH GUSTS UP TO 45 MPH WILL BE POSSIBLE. THE
WINDS WILL DECREASE FRIDAY EVENING AS THE STORM MOVES AWAY FROM
C0LORADO.

THERE WILL BE A SLIGHT CHANCE OF SHOWERS AND THUNDERSTORMS ON LATE
SATURDAY AND SUNDAY WITH COOLER TEMPERATURES. WARMER AND A BIT
DRIER WEATHER IS EXPECTED FROM MONDAY THROUGH WEDNESDAY.

.SPOTTER INFORMATION STATEMENT...

SPOTTER ACTIVATION MAY BE NECESSARY AFTER 2 PM.