The Official 2009-2010 Denver winter weather thread

[Dencolo]

Friday storm looking pretty decent now. NWS sayinjg 5 to 8 inches for Denver. Be an interesting change from sunny and near 70 degrees!

[Dencolo]

You just got to love March. Shorts and 70s one day, then this....

>>>>

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-
INCLUDING THE CITIES OF...FORT COLLINS...HEREFORD...LOVELAND...
NUNN...ARVADA...BOULDER...GOLDEN...LAKEWOOD...LONGMONT...AURORA...
BRIGHTON...CITY OF DENVER...DENVER INTERNATIONAL AIRPORT...
HIGHLANDS RANCH...LITTLETON...PARKER...CASTLE ROCK...ELBERT...
FONDIS...KIOWA...LARKSPUR
256 PM MDT WED MAR 17 2010

...WINTER STORM WATCH IN EFFECT FROM LATE THURSDAY NIGHT THROUGH
FRIDAY EVENING...

THE NATIONAL WEATHER SERVICE IN DENVER HAS ISSUED A WINTER STORM
WATCH...WHICH IS IN EFFECT FROM LATE THURSDAY NIGHT THROUGH
FRIDAY EVENING.

* TIMING...SNOW IS EXPECTED TO SPREAD SOUTHWARD ACROSS THE FRONT
RANGE URBAN CORRIDOR LATE THURSDAY EVENING...AND MAY BECOME HEAVY
AT TIMES THROUGH FRIDAY. THE SNOW IS THEN EXPECTED TO DECREASE
FRIDAY EVENING.

* ACCUMULATION/WIND...TOTAL SNOW ACCUMULATIONS OF 5 TO 10 INCHES
WILL BE POSSIBLE. NORTHEAST WINDS GUSTING UP TO 30 MPH MAY
PRODUCE SOME DRIFTING SNOW.

* MAIN IMPACT...ROADS...ESPECIALLY SECONDARY ROADS AND
NEIGHBORHOOD STREETS...WILL LIKELY BECOME SNOW AND SLUSH
COVERED. VISIBILITIES MAY ALSO BE REDUCED DURING PERIODS OF
HEAVIER SNOWFALL.

[Dencolo]

...WINTER STORM WARNING IN EFFECT FROM MIDNIGHT TONIGHT TO
MIDNIGHT MDT FRIDAY NIGHT...

THE NATIONAL WEATHER SERVICE IN DENVER HAS ISSUED A WINTER STORM
WARNING FOR SNOW HEAVY AT TIMES...WHICH IS IN EFFECT FROM
MIDNIGHT TONIGHT TO MIDNIGHT MDT FRIDAY NIGHT. THE WINTER STORM
WATCH IS NO LONGER IN EFFECT.

* TIMING...SNOW IS EXPECTED DEVELOP ALONG THE FRONT RANGE BY LATE
THURSDAY EVENING...AND MAY BECOME HEAVY AT TIMES LATE TONIGHT
AND FRIDAY. THE SNOW IS THEN EXPECTED TO DECREASE FRIDAY
EVENING.

* ACCUMULATION/WIND...TOTAL SNOW ACCUMULATIONS OF 6 TO 12 INCHES
ARE LIKELY. NORTHEAST WINDS GUSTING UP TO 30 MPH WILL ALSO
PRODUCE AREAS OF BLOWING SNOW.

* MAIN IMPACT...ROADS...ESPECIALLY SECONDARY ROADS AND
NEIGHBORHOOD STREETS...WILL LIKELY BECOME SNOW AND SLUSH COVERED
BY EARLY FRIDAY MORNING. VISIBILITIES MAY ALSO BE SIGNIFICANTLY
REDUCED DURING PERIODS OF HEAVIER SNOWFALL.

[Dencolo]

It just keeps getting better! This is the forecast for Jefferson county below 6000'!

Tonight...Slight chance of rain and snow showers in the evening... Then snow after 10 pm. Snow accumulation of 3 to 6 inches. Lows in the upper 20s. Northeast winds 10 to 20 mph.

Friday...Snow. Some areas of blowing snow. Snow accumulation of 5 to 10 inches. Highs in the upper 20s. northeast winds 10 to 20 mph.

Friday Night...Snow in the evening...diminishing after midnight. Snow accumulation of 1 to 2 inches...with storm totals 9 to 18 inches. Lows around 13. North winds 10 to 15 mph.

[PTPatrick]

I am happy about the storm but I dont see the urban corridor getting close to 12 inches with QPFS for the event under .75 inches on both the nam and the gfs...actually nam is barely a half inch or precip. Hopefully the models are just underestimating, but I could see about 5-9 inches in most of the metro area, and maybe 9-12 in the areas right in and against the foothills like morrison, and castle rock and sedalia. downtown I am going with 6-8, but it hope for more

[Dencolo]

Snow starting to get heavier now. Winter storm warning now up to 7-14 inches. It's going to be an interesting day!

>>>>>>>>>>>>>>

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-
INCLUDING THE CITIES OF...ARVADA...BOULDER...GOLDEN...LAKEWOOD...
LONGMONT...AURORA...BRIGHTON...CITY OF DENVER...
DENVER INTERNATIONAL AIRPORT...HIGHLANDS RANCH...LITTLETON...
PARKER...CASTLE ROCK...ELBERT...FONDIS...KIOWA...LARKSPUR
617 AM MDT FRI MAR 19 2010

...WINTER STORM WARNING REMAINS IN EFFECT UNTIL MIDNIGHT MDT
TONIGHT FOR SOUTHERN PORTIONS OF THE FRONT RANGE URBAN CORRIDOR...

A WINTER STORM WARNING REMAINS IN EFFECT UNTIL MIDNIGHT MDT
TONIGHT.

* TIMING...SNOWFALL WILL BE HEAVY AT TIMES TODAY...WITH A HEAVIEST
SNOWFALL EXPECTED IN THE MORNING AND EARLY THIS AFTERNOON. A
GRADUAL DECREASE IN SNOWFALL IS EXPECTED THIS EVENING.

* ACCUMULATION/WIND...TOTAL SNOW ACCUMULATIONS OF 7 TO 14 INCHES
ARE LIKELY...WITH THE GREATER TOTALS WEST OF I-25. NORTHEAST
WINDS GUSTING UP TO 25 MPH WILL ALSO PRODUCE SOME BLOWING SNOW
MAINLY IN AREAS EAST OF I-25.

* MAIN IMPACT...ROADS AND HIGHWAYS...EVEN MAJOR INTERSTATES...MAY
BECOME SLUSHY AND EVEN SNOW COVERED DURING PERIODS OF HEAVIER
SNOWFALL. VISIBILITIES WILL ALSO BE SIGNIFICANTLY REDUCED DURING
PERIODS OF HEAVY SNOWFALL.

[SCMedic]

Rained early here this AM, but have about 3" down and it's coming down pretty good. Roads are clear, but driveways and sidewalks are starting to accum. I love spring storms!

Next week looks very interesting as well...Althought, it is a few days out... From NOAA..

ATTENTION THEN MOVES TOWARDS NEXT DEVELOPING STORM SYSTEM EXPECTED
TO INFLUENCE OUR WEATHER IN THE LATE TUE/WED TIME FRAME. THE 00Z
EUROPEAN/GFS/GEM ARE AMAZINGLY SIMILAR WITH ALL MODELS SHOWING A
CLOSED LOW NEAR THE 4 CORNERS BY 12Z WEDNESDAY BEFORE SLIDING ACROSS
NRN NEW MEXICO ON THURSDAY. THIS STORM ALSO BEARS WATCHING AS THIS
ONE EVEN TAPS GULF MOISTURE AND WARPS IT BACK INTO COLORADO. THERE
ALSO APPEARS TO BE ENOUGH COLD AIR FOR SNOW AS WELL. BOTH
EUROPEAN/GFS ARE PRODUCING HUGE QPF NUMBERS ACROSS EASTERN COLORADO.
STILL...A BIT EARLY TO GET TOO EXCITED YET. CURRENT GRIDS ALREADY
HAVE CHANCE POPS FOR THE EAST SLOPES AND THIS IS SUFFICIENT FOR NOW.
MAINLY JUST MINOR CHANGES TO OUT PERIODS.

[Dencolo]

7" on ground and has been quite heavy on the SW side of town. Here are some storm totals so far.

PRELIMINARY LOCAL STORM REPORT...SUMMARY
NATIONAL WEATHER SERVICE DENVER CO
100 PM MDT FRI MAR 19 2010

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

1243 PM HEAVY SNOW 3 NW IDLEDALE 39.70N 105.28W
03/19/2010 M12.0 INCH JEFFERSON CO TRAINED SPOTTER

1229 PM HEAVY SNOW NNW ASPEN SPRINGS 39.84N 105.48W
03/19/2010 M6.5 INCH GILPIN CO TRAINED SPOTTER

1229 PM HEAVY SNOW 3 NW IDLEDALE 39.70N 105.28W
03/19/2010 M12.0 INCH JEFFERSON CO TRAINED SPOTTER

1229 PM HEAVY SNOW 3 WNW LITTLETON 39.60N 105.07W
03/19/2010 M7.0 INCH JEFFERSON CO TRAINED SPOTTER

1229 PM HEAVY SNOW 1 SSE ST MARYS GLACIER 39.82N 105.64W
03/19/2010 M11.7 INCH CLEAR CREEK CO TRAINED SPOTTER

1225 PM HEAVY SNOW 4 W ARVADA 39.82N 105.19W
03/19/2010 M5.0 INCH JEFFERSON CO TRAINED SPOTTER

1225 PM HEAVY SNOW 4 ENE NEDERLAND 39.99N 105.45W
03/19/2010 M11.5 INCH BOULDER CO TRAINED SPOTTER

1217 PM HEAVY SNOW 12 NW GOLDEN 39.86N 105.38W
03/19/2010 M9.1 INCH JEFFERSON CO TRAINED SPOTTER

1207 PM HEAVY SNOW 3 ENE ASPEN PARK 39.53N 105.23W
03/19/2010 M9.5 INCH JEFFERSON CO TRAINED SPOTTER

1200 PM HEAVY SNOW 2 N LONGMONT 40.20N 105.11W
03/19/2010 M5.3 INCH BOULDER CO TRAINED SPOTTER

1200 PM HEAVY SNOW BOULDER 40.03N 105.25W
03/19/2010 M7.7 INCH BOULDER CO NWS EMPLOYEE

1132 AM HEAVY SNOW 3 NW IDLEDALE 39.70N 105.28W
03/19/2010 M10.7 INCH JEFFERSON CO TRAINED SPOTTER

1107 AM SNOW LONGMONT 40.17N 105.11W
03/19/2010 M4.3 INCH BOULDER CO NWS EMPLOYEE

1101 AM SNOW 1 NNW LOUISVILLE 39.98N 105.15W
03/19/2010 M4.2 INCH BOULDER CO TRAINED SPOTTER

1100 AM HEAVY SNOW 2 S BOULDER 40.00N 105.25W
03/19/2010 M6.1 INCH BOULDER CO NWS EMPLOYEE

1054 AM HEAVY SNOW 3 W JAMESTOWN 40.11N 105.44W
03/19/2010 M8.5 INCH BOULDER CO TRAINED SPOTTER

1052 AM SNOW 1 NNW CENTENNIAL 39.61N 104.88W
03/19/2010 M3.0 INCH ARAPAHOE CO TRAINED SPOTTER

1052 AM SNOW NNW ASPEN SPRINGS 39.84N 105.48W
03/19/2010 M4.5 INCH GILPIN CO TRAINED SPOTTER

1052 AM SNOW 3 W GREELEY 40.42N 104.80W
03/19/2010 M2.6 INCH WELD CO NWS EMPLOYEE

1040 AM HEAVY SNOW 4 WSW ELDORADO SPRINGS 39.91N 105.34W
03/19/2010 M10.0 INCH JEFFERSON CO TRAINED SPOTTER

[Dencolo]

Check out the 3" of snow in 25 mins report. That is quite impressive.

>>>>>>>>>>>>>>>

PRELIMINARY LOCAL STORM REPORT...SUMMARY
NATIONAL WEATHER SERVICE DENVER CO
143 PM MDT FRI MAR 19 2010

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

0134 PM HEAVY SNOW GENESEE 39.69N 105.27W
03/19/2010 M14.8 INCH JEFFERSON CO TRAINED SPOTTER

0130 PM HEAVY SNOW 3 ENE ASPEN PARK 39.53N 105.23W
03/19/2010 M13.5 INCH JEFFERSON CO TRAINED SPOTTER

3 INCHES SNOW PAST 25 MINUTES

0130 PM HEAVY SNOW 2 ENE BERGEN PARK 39.71N 105.32W
03/19/2010 M10.0 INCH JEFFERSON CO TRAINED SPOTTER

0120 PM HEAVY SNOW N FAIRPLAY 39.23N 106.00W
03/19/2010 M9.0 INCH PARK CO TRAINED SPOTTER

0115 PM HEAVY SNOW 4 WSW ELDORADO SPRINGS 39.91N 105.34W
03/19/2010 M16.0 INCH JEFFERSON CO TRAINED SPOTTER

[SCMedic]

Ended up with 7-8" here in Erie/Broomfield. Tues night/Weds storm has some potential. Should see some accum either way.

[Dencolo]

The 00z GFS is really giving this upcoming storm some nice potential. Looks like over an inch of QPF for the Denver area. We'll see.

[SCMedic]

Another 70 to snow day..


...WINTER STORM WARNING IN EFFECT FROM 3 PM TUESDAY TO 6 PM MDT
WEDNESDAY...

THE NATIONAL WEATHER SERVICE IN DENVER HAS ISSUED A WINTER STORM
WARNING FOR HEAVY SNOW AND BLOWING SNOW WHICH IS IN EFFECT FROM 3
PM TUESDAY TO 6 PM MDT WEDNESDAY.

SNOW WILL SPREAD ACROSS THE AREA TUESDAY...BECOMING HEAVY IN THE
FOOTHILLS TUESDAY AFTERNOON AND NIGHT...AND HEAVY IN THE URBAN
CORRIDOR TUESDAY NIGHT INTO WEDNESDSAY MORNING. EXPECTED SNOW
AMOUNTS ARE 7 TO 16 INCHES IN THE SOUTHERN FOOTHILLS...6 TO 14
INCHES IN THE PALMER DIVIDE...5 TO 10 INCHES IN THE DENVER METRO
AREA. NORTHEAST WINDS OF 15 TO 25 MPH WILL CAUSE AREAS OF BLOWING
AND DRIFTING SNOW.


GFS and ECMF are showing big big snow over Denver.. 30" or so. Doubt we'll see that, but I'd bet on more than the 5-10".

[PTPatrick]

Got some nice thunder snow and thunder graupel earlier with that line that passed but it melted...Has really picked up since 5 now though. totally nuking here right now downtown. About to drive...I am an idiot looks like quite a bit of accumulation already in the northern part of the metro. I think the snow started a little earlier up there although I dont know that it will make a difference in the long run. Should see at least 10 inches by tomorrow mornings along and south of 70...

[SCMedic]

Absolutely nuking at the house 5-6" already. Sloppy wet mush. Storm spawned a nice cell over and east of Denver before the snow came on hard. Lightning/thunder and heavy snow. Awesome day!!

[SCMedic]

8-9" at 7:30. Started snowing here around 4. WET WET WET snow. Roads are trash.

[PTPatrick]

I concur SC...I left to go swimming and couldnt see 10 ft in front of the car so I turned around after a few blocks. power has been flickering a bit too. I dont have anywhere nere 9 inches yet...just about 5 or so but blowing A LOT, like no visibility. It is kind of lighter now than an hour ago but still moderate. Looks like on radar the best lift has moved south through the metro...now situated along and south of 70. could pick up again, but I am betting the 2-3 inch per hour snowfall rates are done for the night. Probably looking at 1/2 inch to inch per hour rates for the rest of the evening here downtown. Looks like the southern edges still under some deep green and yellow echoes though so prolly another hour or 2 of heavy stuff.

8:45 EDIT; Upped the latest forecast a little. Now saying 10-14 inches tonight and 2-4 tomorrow morning...so up to 12-18 inches downtown.

[SCMedic]

15-16" here this AM. Trees and bushes are very unhappy. Good thing we don't have any leaves yet. Power flickered most of the night but never went out.

[Dencolo]

Last night was definately the heaviest snow of the year for me. Don't usually find myself in the bright yellow in the radar returns, but I wouldn't be surprised if it was coming down at 3+ inches per hour. Here are some snow reports. I'm close to the 15" at the bottom of the report.


PRELIMINARY LOCAL STORM REPORT...SUMMARY
NATIONAL WEATHER SERVICE DENVER CO
648 AM MDT WED MAR 24 2010

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

0647 AM HEAVY SNOW 1 N KITTREDGE 39.66N 105.30W
03/24/2010 M16.5 INCH JEFFERSON CO TRAINED SPOTTER

0644 AM HEAVY SNOW NIWOT 40.10N 105.16W
03/24/2010 M7.0 INCH BOULDER CO TRAINED SPOTTER

0643 AM HEAVY SNOW GENESEE 39.69N 105.27W
03/24/2010 M18.6 INCH JEFFERSON CO TRAINED SPOTTER

0641 AM HEAVY SNOW 3 SSE DENVER 39.69N 104.94W
03/24/2010 M9.5 INCH DENVER CO TRAINED SPOTTER

0641 AM HEAVY SNOW 12 SSE AURORA 39.54N 104.73W
03/24/2010 M11.3 INCH DOUGLAS CO TRAINED SPOTTER

0639 AM HEAVY SNOW LAKEWOOD 39.70N 105.11W
03/24/2010 M8.0 INCH JEFFERSON CO TRAINED SPOTTER

0639 AM HEAVY SNOW LOVELAND 40.42N 105.07W
03/24/2010 M8.0 INCH LARIMER CO TRAINED SPOTTER

0638 AM HEAVY SNOW BROOMFIELD 39.94N 105.06W
03/24/2010 M9.0 INCH BROOMFIELD CO TRAINED SPOTTER

0633 AM HEAVY SNOW BERGEN PARK 39.69N 105.36W
03/24/2010 M13.0 INCH JEFFERSON CO TRAINED SPOTTER

0628 AM SNOW 1 E EVANS 40.38N 104.68W
03/24/2010 M5.0 INCH WELD CO TRAINED SPOTTER

0612 AM HEAVY SNOW 1 N LONGMONT 40.19N 105.11W
03/24/2010 M8.0 INCH BOULDER CO TRAINED SPOTTER

0554 AM HEAVY SNOW 4 W DENVER 39.73N 105.04W
03/24/2010 M9.4 INCH DENVER CO TRAINED SPOTTER

0531 AM HEAVY SNOW 1 SW WESTMINSTER 39.87N 105.06W
03/24/2010 M11.0 INCH JEFFERSON CO TRAINED SPOTTER

0519 AM HEAVY SNOW 4 E PARKER 39.51N 104.69W
03/24/2010 M11.3 INCH DOUGLAS CO TRAINED SPOTTER

0513 AM HEAVY SNOW 5 W LITTLETON 39.59N 105.11W
03/24/2010 M15.0 INCH JEFFERSON CO TRAINED SPOTTER

[VoodooCadillac]

YTD snow total for downtown Fort Collins:

First October storm - 3"
Second October storm - 21.5"
3rd storm - 6.5"
12/2/09 - 1.5"
12/6/09 - 10"
12/8/09 - 3"
12/23/09 - 6"
1/3/10 - 0.5"
1/6/10 - 2"
1/28/10 - 0.5"
2/7/10 - 1"
2/8/10 - 1"
2/14/10 - 0.5"
2/18/10 - 2"
2/20-2/21/10 - 6" - more than anticipated, and still snowing, may need to update this tomorrow.
2/28/10 - 0.5"
3/19/10 - 3"
3/23/10 - 8" - very difficult to get a consistent measurement - so this may be the least accurate measurement of the year!
4/29/10 - 1" - surprise!

total = 77.5"

[Stephanie]

My Dad's in Rye and last week he had a foot of snow. Yesterday/today he said he had an additional 15 inches. He did say that last week's snow evaporated very quickly.

March is a pretty snowy month in Colorado, isn't it?