Tornado Warning 55, NWS Denver/Boulder, CO

000 
WWUS55 KBOU 262149
SVSBOU

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE DENVER CO
349 PM MDT FRI JUN 26 2009

COC001-087-262159-
/O.CAN.KBOU.TO.W.0055.000000T0000Z-090626T2200Z/
MORGAN CO-ADAMS CO-
349 PM MDT FRI JUN 26 2009

...THE TORNADO WARNING FOR NORTHEASTERN ADAMS AND SOUTHEASTERN MORGAN
COUNTIES IS CANCELLED...

THE THUNDERSTORM THAT PROMPTED THE WARNING HAS EXITED THE AREA.

A TORNADO WATCH REMAINS IN EFFECT UNTIL 1000 PM MDT FRIDAY EVENING
FOR NORTHEAST COLORADO.

LAT...LON 4010 10348 4000 10362 4000 10370 3994 10371
      3985 10384 4001 10405 4026 10372
TIME...MOT...LOC 2149Z 227DEG 22KT 4010 10365

$$


SWE

AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE DENVER CO
244 PM MDT FRI JUN 26 2009

.SHORT TERM...MID-LEVEL SHORTWAVE AND AN ASSOCIATED SFC COLD FRONT
FCST TO EXIT THE FCST AREA BY LATE THIS EVENING. IN THEIR WAKE
DRIER...SLIGHTLY COOLER AND PROGRESSIVELY MORE STABLE AIR PROGGED TO
SPREAD ACROSS THE FCST AREA FM NORTHWEST TO SOUTHEAST DURING THE DAY
SATURDAY. PRESENT TEMPERATURE FCST FOR TONIGHT AND SATURDAY LOOKS
OKAY AS IT REFLECTS THE 1-3C COOL DOWN TOMORROW.

AS FOR THE REMAINDER OF THIS AFTERNOON AND TONIGHT...SPC JUST ISSUED
A SEVERE T-STORM WATCH FOR NEARLY ALL OF NORTHEAST AND EAST CENTRAL
COLORADO UNTIL 03Z THIS EVENING. SOLID LINE OF STORMS MOVING OFF THE
FOOTHILLS AND ACROSS THE I-25 URBAN CORRIDOR NEXT HOUR OR TWO WILL
CONTINUE TO MOVE EAST ACROSS THE REMAINDER OF THE PLAINS BY
MID-EVENING. STRONG...POSSIBLY DAMAGING STRAIGHT LINE WINDS...SMALL
HAIL AND HEAVY RAINFALL BIGGEST THREAT FROM THESE STORMS. PW VALUES
ALONG THE FRONT RANGE OVER AN INCH AND A QUARTER AND DEWPTS IN THE
UPR 50S-MID 60S WILL SUPPORT HEAVY RAINFALL WHICH COULD RESULT IN
LOCALIZED FLOODING. COOLING ALOFT WITH PASSING TROUGH NEXT SEVERAL
HOURS WILL ALSO SUPPORT HAIL FORMATION. MOST OF THIS HAIL WILL BE
SMALL/GENERALLY LESS THAN 3/4 INCH IN DIAMETER. HOWEVER CAN/T RULE
OUT AN ISOLATED STORM CAPABLE OF 1 INCH STONES.  AGAIN MAIN THREAT
WILL BE HEAVY RAIN...LOCALIZED FLOODING AND STRONG STRAIGHT LINE
WINDS. RAINFALL RATES OF 0.75 TO 1.50 INCH IN UNDER AN HOUR NOT OUT
OF THE QUESTION. WILL SEE THIS STORM FRONT MOVING  INTO HIGHER
CAPES...BETTER SHEAR AND DEEPER MOISTURE FARTHER OUT ON THE PLAINS.
BEST CAPE AND SHEAR AT THIS HOUR EAST OF A LINE EXTENDING NEWRD FM
ELBERT COLORADO TO SYDNEY NEBRASKA. FCST SOUNDINGS SHOW 0-3KM SHEAR
INCREASING WITHIN THIS REGION NEXT SEVERAL HOURS WITH THE 700 MB
TROUGH APPROACHING. CAPES UP AROUND 2800 J/KG AND HELICITY OVER 200
M2/S2 UP NEAR THE NERN CORNER OF THE STATE EARLY THIS EVENING. IN
ADDITION TO PRODUCING HEAVY RAINFALL BELIEVE SOME STORMS WITHIN THIS
REGION WILL PRODUCE LARGE DAMAGING HAIL...STRONG TO SEVERE STRAIGHT
LINE WINDS...AND POSSIBLY A FEW TORNADOES. SHOULD SEE NEARLY ALL OF
THESE STORM ACTIVITY ENDING OR MOVING OUT OF THE AREA BETWEEN
04Z-06Z TONIGHT.

.LONG TERM...FOR SATURDAY NIGHT...THE CWA WILL STILL BE IN THE WAKE
OF TROF PASSAGE FROM THE DAY ON SAT WITH STILL A SUBSIDENT AIRMASS
IN PLACE...ESPECIALLY OVER THE FAR NERN PLAINS. THE BEST CHANCES FOR
AN ISOLATED STORM APPEARS WILL BE MAINLY CONFINED TO THE EAST SLOPES
AND HIGHER TERRAIN AREAS. THE RIDGE ALOFT WILL BE BUILDING ACROSS
THE REGION ON SUNDAY. WITH THE RIDGE THOUGH...MSTR SNEAKS BACK INTO
THE AREA...ESPECIALLY SOUTHERN SECTIONS WITH A BIT BETTER CHANCE FOR
STORMS ON A RETURN SERLY LOW LVL FLOW.

A GENERALLY DRY NW FLOW PATTERN WILL BE OVER THE REGION MON AND TUE
BUT STILL CANT RULE OUT AN ISOLATED AFTN/EVENING STORM EACH DAY. A
BIT OF A WARMING TREND AS WELL WITH TEMPS GETTING CLOSE TO 90
DEGREES EACH DAY. THE RIDGE BREAKS DOWN BY THE MIDDLE OF THE WEEK
WITH THE PASSAGE OF A FEW WEAK FRONTS AND SOME RETURN OF MOISTURE.
WILL TREND LOWER TEMPS AND HIGHER POPS FOR LATER IN THE WEEK.

&&

.AVIATION...LINE OF SHOWERS AND THUNDERSTORMS WILL MOVE ACROSS THE
I-25 URBAN CORRIDOR INCLUDING THE DENVER METRO AREA BETWEEN NOW AND
23Z THIS AFTERNOON. HAIL...HEAVY RAIN...AND STRONG POSSIBLY SEVERE
THUNDERSTORM WINDS CAN BE EXPECTED. VISIBILITIES LESS THAN 2 MILES
AND CIGS BELOW 2000 FT AGL ARE POSSIBLE WITH THESE STORMS. AFTER
01Z/SATURDAY SHOULD SEE IMPROVING CONDITIONS WITH PASSAGE OF A LOW
PRESSURE TROUGH. BY MIDNIGHT...VFR CIGS AND VSBYS WILL PREVAIL.

&&

.BOU WATCHES/WARNINGS/ADVISORIES...SEVERE T-STORM WATCH FOR NEARLY
ALL OF NORTHEAST AND EAST CENTRAL COLORADO UNTIL 03Z THIS EVENING.

BAKER/ENTREKIN

HAZARDOUS WEATHER OUTLOOK...UPDATED
NATIONAL WEATHER SERVICE DENVER CO
115 PM MDT FRI JUN 26 2009

COZ030>051-271200-
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-
115 PM MDT FRI JUN 26 2009

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

...HEAVY RAIN POSSIBLE AGAIN WITH THUNDERSTORMS THIS AFTERNOON AND
EVENING...

.DAY ONE...TODAY AND TONIGHT

A WIDE SWATH OF SHOWERS AND THUNDERSTORMS CROSSING THE COLORADO HIGH
COUNTRY...SOME OF WHICH WERE PRODUCING HEAVY RAIN AND SMALL HAIL...
WILL MOVE EAST ACROSS THE EASTERN PLAINS OF COLORADO DURING THE
AFTERNOON AND EVENING HOURS. ATMOSPHERIC MOISTURE REMAINS QUITE
ABUNDANT AS EVIDENT BY DEWPOINT TEMPERATURES IN THE 50S IN THE HIGH
COUNTRY AND UPPER 50S TO MID 60S ON THE PLAINS.

WINDS ALOFT WERE SOMEWHAT STRONGER TODAY IN ADVANCE OF THE LOW
PRESSURE TROUGH MOVING ACROSS COLORADO TODAY...WHICH WILL HELP TO
MOVE STORMS FASTER TODAY. HOWEVER HIGH COUNTRY STORMS WILL BE
CAPABLE OF LOCALLY HEAVY RAINFALL AND SMALL HAIL...WITH MINOR
FLOODING A POSSIBILITY ON CREEKS AND SMALL STREAMS. AS THIS LINE OF
STORMS MOVES OUT ONTO THE PLAINS SOME STRENGTHENING IS LIKELY.
STORMS MOVING OFF THE FOOTHILLS AND ACROSS THE I-25 URBAN CORRIDOR
AROUND MID-AFTERNOON WILL BE CAPABLE OF HEAVY RAIN...SMALL HAIL AND
GUSTY WINDS. FARTHER OUT ACROSS THE PLAINS WHERE GREATER MOISTURE...
INSTABILITY AND SHEAR EXIST...IN ADDITION TO PRODUCING HEAVY
RAINFALL...A FEW STORMS MAY PRODUCE LARGE DAMAGING HAIL AND POSSIBLY
A BRIEF TORNADO.

THUNDERSTORM RAINFALL RATES OF 3/4 TO 1 1/2 INCHES PER HOUR ARE
PROBABLE...WITH RATES LOCALLY UP TO 2 1/2 INCHES PER HOUR POSSIBLE
WITH THE HEAVIER STORMS ON THE PLAINS. THEREFORE MINOR FLOODING OF
STREETS...CREEKS AND LOW LYING AREAS WILL BE POSSIBLE...PARTICULARLY
IN THOSE URBAN AREAS THAT EXPERIENCED HEAVY RAINFALL AND MINOR
FLOODING YESTERDAY.

.DAYS TWO THROUGH SEVEN...SATURDAY THROUGH THURSDAY

THERE WILL ONLY BE A SLIGHT CHANCE OF AFTERNOON AND EVENING
THUNDERSTORMS SATURDAY THROUGH TUESDAY AS HIGH PRESSURE BUILDS OVER
THE AREA. THERE WILL BE AN INCREASE IN STORM COVERAGE ALONG WITH
SLIGHTLY COOLER TEMPERATURES FOR WEDNESDAY AND THURSDAY AS THE RIDGE
WEAKENS AND MOISTURE INCREASES.

.SPOTTER INFORMATION STATEMENT...

SPOTTER ACTIVATION IS NOT ANTICIPATED TODAY OR TONIGHT. ALTHOUGH
SPOTTERS ARE URGED TO RELAY REPORTS OF HEAVY RAIN AND ANY FLOODING
TO THE NATIONAL WEATHER SERVICE IN BOULDER.

BAKER/ENTREKIN

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE DENVER CO
224 PM MDT FRI JUN 26 2009

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

0222 PM     NON-TSTM WND GST 4 N BUCKEYE             40.88N 105.10W
06/26/2009  M78.00 MPH       LARIMER            CO   TRAINED SPOTTER

            SUSTAINED WIND SPEED OF 68 MPH

&&

JK

PRELIMINARY LOCAL STORM REPORT...SUMMARY
NATIONAL WEATHER SERVICE DENVER CO
229 PM MDT FRI JUN 26 2009

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

0222 PM     NON-TSTM WND GST 4 N BUCKEYE             40.88N 105.10W
06/26/2009  M78.00 MPH       LARIMER            CO   TRAINED SPOTTER

            SUSTAINED WIND SPEED OF 68 MPH

0211 PM     TSTM WND GST     7 WNW BERTHOUD          40.35N 105.21W
06/26/2009  M68.00 MPH       LARIMER            CO   TRAINED SPOTTER

&&

JK

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE DENVER CO
238 PM MDT FRI JUN 26 2009

COZ041-045-046-262115-
NORTH AND NORTHEAST ELBERT COUNTY BELOW 6000 FEET/NORTH LINCOLN
COUNTY CO-CENTRAL AND EAST ADAMS AND ARAPAHOE COUNTIES CO-
ELBERT/CENTRAL AND EAST DOUGLAS COUNTIES ABOVE 6000 FEET CO-
238 PM MDT FRI JUN 26 2009

THE NATIONAL WEATHER SERVICE IN DENVER HAS ISSUED A SIGNIFICANT
WEATHER ADVISORY FOR

  NORTHWESTERN ELBERT COUNTY
  EXTREME SOUTHEASTERN DOUGLAS COUNTY
  EASTERN ARAPAHOE COUNTY
  EASTERN ADAMS COUNTY

AT 237 PM MDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
LINE OF THUNDERSTORMS.  THESE STORMS WERE LOCATED ALONG A LINE
EXTENDING FROM 5 MILES SOUTHWEST OF LEADER TO 3 MILES SOUTH OF
ELBERT...OR ALONG A LINE EXTENDING FROM 34 MILES SOUTHWEST OF FORT
MORGAN TO 26 MILES NORTHEAST OF COLORADO SPRINGS.  THE LINE OF
THUNDERSTORMS WAS NEARLY STATIONARY.

LOCATIONS IN THE ADVISORY INCLUDE BUT ARE NOT LIMITED TO STRASBURG...
LEADER...KIOWA...ELBERT...DEER TRAIL AND BYERS.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

THUNDERSTORMS OCCASIONALLY PRODUCE WEAK...SHORT-LIVED TORNADOES WITH
LITTLE OR NO ADVANCE WARNING. THESE WEAK TORNADOES ARE CAPABLE OF
PRODUCING MINOR DAMAGE SO IF A TORNADO IS OBSERVED MOVE TO A PLACE OF
SAFETY.

&&

LAT...LON 3995 10384 3955 10387 3918 10423 3920 10468
      3954 10440 3996 10425
TIME...MOT...LOC 2037Z 269DEG 24KT 3984 10409 3955 10427
          3918 10454

DANKERS

PRELIMINARY LOCAL STORM REPORT...SUMMARY
NATIONAL WEATHER SERVICE DENVER CO
254 PM MDT FRI JUN 26 2009

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

0253 PM     TSTM WND GST     2 WSW ARVADA            39.82N 105.14W
06/26/2009  E65.00 MPH       JEFFERSON          CO   TRAINED SPOTTER

0222 PM     NON-TSTM WND GST 4 N BUCKEYE             40.88N 105.10W
06/26/2009  M78.00 MPH       LARIMER            CO   TRAINED SPOTTER

            SUSTAINED WIND SPEED OF 68 MPH

0211 PM     TSTM WND GST     7 WNW BERTHOUD          40.35N 105.21W
06/26/2009  M68.00 MPH       LARIMER            CO   TRAINED SPOTTER

&&

JK