Winter Storm Denis Snowfall Totals

From the National Weather Service:

HARTFORD COUNTY








GLASTONBURY 17.0



SOUTH WINDSOR 15.0



MANCHESTER 14.8



SUFFIELD 14.2



ENFIELD 13.5



WETHERSFIELD 13.0



ROCKY HILL 12.5



WINDSOR LOCKS 12.0



EAST WINDSOR 12.0 O



BRISTOL 12.0



WEST HARTFORD 11.0



UNIONVILLE 10.0



AVON 9.5



BURLINGTON 9.0



EAST FARMINGTON HEIG 9.0



GRANBY (2MI SW) 8.0



NORTH GRANBY 6.5



GRANBY 6.0







TOLLAND COUNTY







STAFFORDVILLE 19.2 R



STAFFORD 18.0



STAFFORD SPRINGS 16.0



TOLLAND 16.0



COVENTRY 15.0 C



SOMERS 13.0



VERNON 13.0



ELLINGTON 13.0



STORRS 13.0







WINDHAM COUNTY







HAMPTON 18.0



MOOSUP 17.5



EAST KILLINGLY 16.5



DANIELSON 15.0



ASHFORD 14.0



SCOTLAND 13.0







FAIRFIELD COUNTY







DARIEN 18.0



NEW CANAAN 18.0



NORWALK 18.0



WILTON 17.3



WEST NORWALK 17.0



WESTON 16.5



GREENWICH 16.0



WESTPORT 14.8



NEWTOWN 14.2



RIDGEFIELD 14.0



BRIDGEPORT 13.0



SHELTON 13.0



DANBURY 13.0



3 SSE BROOKFIELD 9.5







MIDDLESEX COUNTY







1 NE EAST HAMPTON 16.0



MIDDLETOWN 15.0



HADDAM 15.0



OLD SAYBROOK 15.0



1 S PORTLAND 13.0







NEW HAVEN COUNTY







NORTH HAVEN 18.5



SEYMOUR 16.5



MILFORD 16.3



NEW HAVEN 16.0



PROSPECT 16.0



3 ESE MILFORD 15.4



BRANFORD 15.0



NAUGATUCK 13.0



MERIDEN 13.0



SOUTHBURY 12.5



WATERBURY 11.5



BEACON FALLS 10.5







NEW LONDON COUNTY







LISBON 17.5



COLCHESTER 16.0



GROTON 13.8



NORTH FRANKLIN 13.5



GALES FERRY 12.5



3 WNW OAKDALE 12.0



NORWICH 10.5



LEDYARD CENTER 10.0







LITCHFIELD COUNTY







THOMASTON 10.5



THOMASTON DAM 10.5



WOODBURY 10.0



NEW MILFORD 7.5



WINSTED 7.5



LITCHFIELD 7.0



TORRINGTON 7.0



CORNWALL 7.0



BAKERSVILLE 6.5



WINCHESTER CENTER 6.0



2 N SOUTH CANAAN 6.0



COLEBROOK LAKE 5.5



NORFOLK 4.9

24 Hour Forecast

24 Hour Forecast

NWS	Snow Wednesday and Wed. night, with 6-10 inches accumulation
Weather Channel	Snow Wednesday (less than 1 inch) and Wed. night; 5-8 inches (6-12 for most of state on the forecast map, with exception of NW CT)
Intellicast	Snow Wednesday (less than 1 inch) and Wed. night; 5-8 inches
Wunderground	Essentially the same forecast as National Weather Service (6-10 inches)
Accuweather	Snow Wednesday with a coating-1 inch.  Snow Wed. night; 6-10 inches.  8.7 inches specifically predicted for Avon.  Interestingly, they predict 10.5 inches for Unionville, and 10.6 for West Hartford.
WFSB	Snow or mix Wednesday and all snow.  5-10 inches or 6-12 inches, depending on the track of the storm.
WVIT	Snow Wednesday afternoon, becoming heavy overnight.  4-8 inches in the southeast. 6-10 inches for most of the state, and 4-8 inches in  extreme northwestern CT
FOX CT	Snow and mixed precipitation Wednesday afternoon, and snow heavy at times Wednesday night with 6-12 inches across the state

Winter Storm Claire Totals and Forecast Winner

Below are the storm totals for winter storm Claire.  I measured 4 inches in Avon, which is consistent with what's reported from the National Weather Service.  So the verdict on best forecasts? 

National Weather Service had the most accurate longer range forecast amounts, predicting 4-8 inches about 72 hours prior to the storm arriving.  Accuweather predicted 1-3 inches.  All other sites I reviewed weren't able to predict an amount at that point. 

Strangely, NWS removed their prediction at about 48 hours out from the storm.  Accuweather predicted 3-6 inches with 4.3 inches for Avon.  WFSB predicted 5-10 inches and Fox predicted 6-12 inches.  Weather Channel predicted 1-3 inches.  Other sites didn't provide any prediction.  The clear winner 48 hours prior to the storms arrival is Accuweather. 

Many sites came together at the 24 hour mark, predicting about 2-6 inches.

Winner: Accuweather. 

While NWS had a better long term forecast in this instance, they seemed to back off a little, whereas Accuweather's overall provided a more consistent, and ultimately, accurate forecast in this case. 

Herer are the storm totals for Claire from the National Weather Service:

PUBLIC INFORMATION STATEMENT

SPOTTER REPORTS

NATIONAL WEATHER SERVICE TAUNTON MA

545 PM EST FRI JAN 21 2011

THE FOLLOWING ARE UNOFFICIAL OBSERVATIONS TAKEN DURING THE PAST 33 HOURS

FOR THE STORM THAT HAS BEEN AFFECTING OUR REGION.  APPRECIATION IS EXTENDED

TO HIGHWAY DEPARTMENTS...COOPERATIVE OBSERVERS...SKYWARN SPOTTERS

AND MEDIA FOR THESE REPORTS.  THIS SUMMARY IS ALSO AVAILABLE ON OUR

HOME PAGE AT WEATHER.GOV/BOSTON

********************STORM TOTAL SNOWFALL********************

LOCATION          STORM TOTAL     TIME/DATE   COMMENTS

                     SNOWFALL           OF

                     /INCHES/   MEASUREMENT

CONNECTICUT

...HARTFORD COUNTY...

   SIMSBURY               6.0   829 AM  1/21  HAM RADIO

   WINDSOR LOCKS          5.6   120 PM  1/21  BRADLEY AIRPORT

   SUFFIELD               5.2   843 AM  1/21  HAM RADIO

   MANCHESTER             5.0  1041 AM  1/21  HAM RADIO

   SOUTH WINDSOR          5.0  1138 AM  1/21

   WEST HARTFORD          4.8   906 AM  1/21  HAM RADIO

   BURLINGTON             4.7   954 AM  1/21  TRAINED SPOTTER

   2 SW GRANBY            4.5   951 AM  1/21  NWS EMPLOYEE

   ENFIELD                4.5  1042 AM  1/21  HAM RADIO

   EAST HARTFORD          4.5  1037 AM  1/21  HAM RADIO

   WETHERSFIELD           4.0  1045 AM  1/21  HAM RADIO

   AVON                   4.0  1015 AM  1/21

   SOUTHINGTON            3.0   837 AM  1/21  HAM RADIO

...TOLLAND COUNTY...

   TOLLAND                6.5  1233 PM  1/21

   STORRS                 6.5   910 AM  1/21  TRAINED SPOTTER

   COVENTRY               6.0  1229 PM  1/21  HAM RADIO

   STAFFORDVILLE          6.0  1101 AM  1/21  COOP OBSERVER

   STAFFORD SPRINGS       5.6  1122 AM  1/21

   ELLINGTON              5.0  1039 AM  1/21  HAM RADIO

   VERNON                 4.1  1038 AM  1/21  HAM RADIO

...WINDHAM COUNTY...

   ASHFORD                7.0  1100 AM  1/21  HAM RADIO

   EAST KILLINGLY         6.1   248 PM  1/21

   WOODSTOCK              5.8   912 AM  1/21  HAM RADIO

   BROOKLYN               5.8  1117 AM  1/21  HAM RADIO

   PLAINFIELD             5.5  1154 AM  1/21  HAM RADIO

   MOOSUP                 5.2  1118 AM  1/21  GENERAL PUBLIC

It appears that most of the forecasts appear to be coming more into line with 2-6 amounts predicted generally.  Accuweather notably is predicting 6-10 inches on a forecast map for eastern portions of the state. 

24 Hour Forecast

NWS	Snow late Thursday (1-2 inches) night through Friday (no predicted amount)
Weather Channel	1-2 inches of snow Thursday night.  Periods of snow Friday.  No specific amount predicted other than 3-6 inches in a map forecast.
Intellicast	Snow Thursday night with 1-2 inches and periods of snow Friday (no prediction for Friday).
Wunderground	Snow Thursday night (1-3 inches) and Friday; no amounts provided for Friday.
Accuweather	Snow late Thursday (1-2 inches) and into Friday, with an additional 2-4 inches (4.3 predicted for Avon).  Recent map forecast says 3-6 for most of the state and 6-10 for eastern parts of the state (this appears to be an upgrade)
WFSB	Snow late Thursday into Friday.  2-6 inches (downgrade from 5-10 inches)
WVIT	A plowable amount of snow likely. 2-5 inches statewide.
FOX CT	Snow Friday, 3-6 inches (downgrade from 6-12 inches)

48 hour Forecast Summaries

As you can see, there's some variance among forecasts for those who tried to provide an actual amount.  A lot of uncertainty at this point due to, according to NWS, differences among computer models that could either result in a big storm or just a glancing blow. 

48 Hour Forecast

NWS	Snow late Thursday night through Friday; no predicted amount
Weather Channel	Periods of snow Friday.  Unclear amounts: appears to be stating 1-3 inches in general article discussion
Intellicast	Snow Thursday night with possible accumulation and periods of snow Friday.
Wunderground	Snow Thursday night and Friday; no amounts provided.
Accuweather	Snow late Thursday and into Friday: 3-6 inches total accumulation (4.3 predicted for Avon
WFSB	Snow late Thursday into Friday.  5-10 inches
WVIT	A plowable amount of snow likely.
FOX CT	snow likely; 6-12 inches

8 Day Plus Extended Forecast Summaries

I want to stress that on-the-air discussions might not always be included in the online forecasts, even though it would be nice if all pertinent discussion was.  I'm also noticing a pattern of the same forecasts coming out of WVIT, Weather Channel, and Intellicast, with Wunderground essentially provinding a forecast very similar to the National Weather Service.  

8 Day Plus Forecast

NWS	Nothing listed
Weather Channel	Snow shower 1/26 and 1/27
Intellicast	Snow showers 1/26 and 1/27
Wunderground	Nothing listed
Accuweather	Snow on 1/25 and 1/26
WFSB	Possible storm on 1/25 (noted in technical discussion section)
WVIT	Nothing listed
FOX CT	Nothing listed

72 Hour Forecast Summaries

72 Hour Forecast

NWS	Snow (4-8 inches) likely Thursday night and Friday morning
Weather Channel	Chance of a few snow showers
Intellicast	Chance for a few snow showers
Wunderground	Snow likely Thursday night and Friday
Accuweather	1-3 inches of snow, but potential for major storm
WFSB	A possible quick storm with light to moderate snow
WVIT	Snow showers possible
FOX CT	Another possible snow storm

24 hour forecast summary for next storm

UPDATE 1/18/11:  I've measured a strong 2 inches here in Avon prior to the changeover, possibly 2.5, but Accuweather was off by about 1/10 of an inch in their prediction for my town.  Pretty good. 

I'm going to now use the forecast for my location (Avon) as the baseline for the forecasts I list.  I will try to include additional predictions included for other parts of the state.

24 Hour Forecast

NWS	3-7 inches. Snow, sleet, and freezing rain
Weather Channel	3-5 inches: snow to sleet and freezing rain
Intellicast	3-5 inches: snow to mixed precip.
Wunderground	3-5 inches: snow, sleet, freezing rain, rain
Accuweather	1-3 inches: heavy snow to sleet and freezing rain (1.9 inches predicted specifically for Avon)
WFSB	2-5 inches: snow changing to sleet, freezing rain, and rain
WVIT	5-6” northwest; 2-5” inland; 1-2 at shore; wintry mix
FOX CT	3-6” NW of I-84; 1-3” SE of I-84; coating further SE (wintry mix)

Winter Storm Benedict - More Snowfall Totals (southern CT)

From the National Weather Service:

********************STORM TOTAL SNOWFALL********************

LOCATION          STORM TOTAL     TIME/DATE   COMMENTS

                     SNOWFALL           OF

                     /INCHES/   MEASUREMENT

CONNECTICUT

...FAIRFIELD COUNTY...

   NEW FAIRFIELD         28.0  1050 AM  1/12  PUBLIC

   NEWTOWN               27.0   840 AM  1/12  SKYWARN SPOTTER

   WESTON                24.5   800 AM  1/12  SKYWARN SPOTTER

   DANBURY               24.1   300 PM  1/12  SKYWARN SPOTTER

   RIDGEFIELD            22.0   645 AM  1/12  PUBLIC

   3 SSE BROOKFIELD      22.0   730 AM  1/12  COCORAHS

   DANBURY               21.8  1000 AM  1/12  NWS COOP

   WILTON                18.7   830 AM  1/12  PUBLIC

   NEW CANAAN            18.0   915 AM  1/12  SKYWARN SPOTTER

   DARIEN                17.5  1100 AM  1/12  CT DOT

   WESTPORT              17.4   815 AM  1/12  SKYWARN SPOTTER

   SHELTON               17.3   950 AM  1/12  PUBLIC

   BRIDGEPORT            16.0   100 PM  1/12  NWS COOP

   NORWALK               16.0   934 AM  1/12  PUBLIC

   GREENWICH             15.5   250 PM  1/12  PUBLIC

   STRATFORD             14.0   930 AM  1/12  PUBLIC

   STAMFORD              14.0   800 AM  1/12  SKYWARN SPOTTER

...MIDDLESEX COUNTY...

   HADDAM                22.0   214 PM  1/12  PUBLIC

   PORTLAND              22.0   800 AM  1/13  COCORAHS

   EAST HADDAM           21.5   335 PM  1/12  PUBLIC

   CLINTON               21.0  1200 PM  1/12  PUBLIC

   WESTBROOK             20.5   915 PM  1/12  PUBLIC

   DEEP RIVER            20.0  1100 AM  1/12  PUBLIC

   OLD SAYBROOK          17.5   300 PM  1/12  CT DOT

...NEW HAVEN COUNTY...

   NORTH HAVEN           30.5   630 PM  1/12  PUBLIC

   MERIDEN               29.0   120 PM  1/12  SKYWARN SPOTTER

   SOUTHBURY             28.0  1120 AM  1/12  PUBLIC

   CHESHIRE              25.5   300 PM  1/12  PUBLIC

   GUILFORD              24.5   300 PM  1/12  PUBLIC

   NORTH BRANFORD        24.0  1240 PM  1/12  PUBLIC

   BETHANY               21.0  1220 PM  1/12  SKYWARN SPOTTER

   SEYMOUR               20.0  1100 AM  1/12  PUBLIC

   WATERBURY             20.0   100 PM  1/12  CT DOT

   OXFORD                20.0   745 AM  1/12  PUBLIC

   BRANFORD              19.8  1230 PM  1/12  PUBLIC

   NEW HAVEN             19.0  1100 AM  1/12  CT DOT

   MILFORD               18.0  1100 AM  1/12  CT DOT

   BEACON FALLS          17.3  1100 AM  1/12  CT DOT

...NEW LONDON COUNTY...

   OLD LYME              24.0   800 AM  1/13  PUBLIC

   COLCHESTER            20.0   500 PM  1/12  CT DOT

   NORWICH               17.0   100 PM  1/12  CT DOT

   LISBON                16.9   300 PM  1/12  SKYWARN SPOTTER

   QUAKER HILL           15.8   630 PM  1/12  COCORAHS

   NORTH FRANKLIN        15.5   715 PM  1/12  PUBLIC

   LEDYARD CENTER        15.0   300 PM  1/12  SKYWARN SPOTTER

   GROTON                14.8   300 PM  1/12  CT DOT

   GALES FERRY           14.0   110 PM  1/12  SKYWARN SPOTTER

   WATERFORD             13.0  1000 AM  1/12  SKYWARN SPOTTER

   STONINGTON            10.5   300 PM  1/12  SKYWARN SPOTTER