BIRCH HILL DAM, MA - COOP Northeast station 190666

190666 - BIRCH HILL DAM, Massachusetts

Latitude
42° 38´N

Longitude
72° 7´W

Elevation
263 meters

10 nearest COOP Northeast stations

5 mi	NE :	WINCHENDON 2, MA
5 mi	NNE :	WINCHENDON, MA
5 mi	W :	TULLY LAKE, MA
6 mi	SW :	ATHOL, MA
8 mi	ESE :	GARDNER, MA
8 mi	SSW :	HARVARD FOREST, MA
8 mi	SSW :	PETERSHAM 3 N, MA
10 mi	N :	FITZWILLIAM, NH
11 mi	NNW :	FITZWILLIAM 2 W, NH
12 mi	E :	ASHBURNHAM, MA

Weather variables Help
Click a weather variable name to jump down to those statistics.

	Total observations	%	NDJFM observations	%
TMAX	17463	95.6%	7093	93.8%
TMIN	17384	95.2%	7081	93.6%
PRCP	17973	98.4%	7374	97.5%
SNOW	17885	97.9%	7345	97.1%

TMAX Help top of page

TMAX	observations	mean	std dev		Distribution	during extreme days of
NDJFM	7093 by year	38.4°F	11.5°F		overall	NAM	PNA	CTI

TMAX and NAM Help scatterplot	days by month	mean NAM index	extreme high NAM days	extreme low NAM days	ratio of extreme high:low NAM days
Extreme high events Days with TMAX>=57°F	483	0.29	92	32	2.9*	map	table
Extreme low events Days with TMAX<=22°F	565	-0.25	95	148	1.6*	map	table

TMAX and PNA Help scatterplot	days by month	mean PNA index	extreme high PNA days	extreme low PNA days	ratio of extreme high:low PNA days
Extreme high events Days with TMAX>=57°F	483	-0.20	36	69	1.9*	map	table
Extreme low events Days with TMAX<=22°F	565	0.34	135	71	1.9*	map	table

TMAX and CTI Help	days by month	high CTI days (moderate to strong El Niño winters)	low CTI days (moderate to strong La Niña winters)	ratio of high:low CTI (El Niño:La Niña days)
Extreme high events Days with TMAX>=57°F	483	75	100	1.3	map	table
Extreme low events Days with TMAX<=22°F	565	58	92	1.6*	map	table

TMAX under 2 index extremes Help

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TMIN Help top of page

TMIN	observations	mean	std dev		Distribution	during extreme days of
NDJFM	7081 by year	17.1°F	14.0°F		overall	NAM	PNA	CTI

TMIN and NAM Help scatterplot	days by month	mean NAM index	extreme high NAM days	extreme low NAM days	ratio of extreme high:low NAM days
Extreme low events Days with TMIN<=-6°F	488	-0.00	94	83	1.1	map	table
Extreme high events Days with TMIN>=35°F	542	0.03	66	54	1.2	map	table

TMIN and PNA Help scatterplot	days by month	mean PNA index	extreme high PNA days	extreme low PNA days	ratio of extreme high:low PNA days
Extreme low events Days with TMIN<=-6°F	488	0.18	118	84	1.4	map	table
Extreme high events Days with TMIN>=35°F	542	-0.13	50	75	1.5*	map	table

TMIN and CTI Help	days by month	high CTI days (moderate to strong El Niño winters)	low CTI days (moderate to strong La Niña winters)	ratio of high:low CTI (El Niño:La Niña days)
Extreme low events Days with TMIN<=-6°F	488	44	77	1.8*	map	table
Extreme high events Days with TMIN>=35°F	542	84	81	1.0	map	table

TMIN under 2 index extremes Help

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PRCP (total liquid water equivalent) Help top of page

PRCP	observations	mean		Distribution	during extreme days of
NDJFM	7374 by year	0.11"		overall	NAM	PNA	CTI

PRCP and NAM Help scatterplot	days by month	mean	mean NAM index	extreme high NAM days	extreme low NAM days	ratio of extreme high:low NAM days
Observed events Days with PRCP>0.00"	2626	0.32"	-0.04	390	436	1.1	map	table
Extreme events Days with PRCP>0.53"	520	0.93"	0.02	82	72	1.1	map	table

PRCP and PNA Help scatterplot	days by month	mean	mean PNA index	extreme high PNA days	extreme low PNA days	ratio of extreme high:low PNA days
Observed events Days with PRCP>0.00"	2626	0.32"	-0.03	426	467	1.1	map	table
Extreme events Days with PRCP>0.53"	520	0.93"	0.21	106	60	1.8*	map	table

PRCP and CTI Help	days by month	mean	high CTI days (moderate to strong El Niño winters)	low CTI days (moderate to strong La Niña winters)	ratio of high:low CTI (El Niño:La Niña days)
Observed events Days with PRCP>0.00"	2626	0.32"	390	460	1.2*	map	table
Extreme events Days with PRCP>0.53"	520	0.93"	94	76	1.2	map	table

PRCP under 2 index extremes Help

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SNOW Help top of page

SNOW	observations	mean		Distribution	during extreme days of
NDJFM	7345 by year	0.37"		overall	NAM	PNA	CTI

SNOW and NAM Help scatterplot	days by month	mean	mean NAM index	extreme high NAM days	extreme low NAM days	ratio of extreme high:low NAM days
Observed events Days with SNOW>0.0"	995	2.72"	-0.18	142	207	1.5*	map	table
Extreme events Days with SNOW>4.0"	189	7.22"	-0.19	24	41	1.7	map	table

SNOW and PNA Help scatterplot	days by month	mean	mean PNA index	extreme high PNA days	extreme low PNA days	ratio of extreme high:low PNA days
Observed events Days with SNOW>0.0"	995	2.72"	0.07	201	175	1.1	map	table
Extreme events Days with SNOW>4.0"	189	7.22"	0.39	52	26	2.0*	map	table

SNOW and CTI Help	days by month	mean	high CTI days (moderate to strong El Niño winters)	low CTI days (moderate to strong La Niña winters)	ratio of high:low CTI (El Niño:La Niña days)
Observed events Days with SNOW>0.0"	995	2.72"	142	173	1.2	map	table
Extreme events Days with SNOW>4.0"	189	7.22"	37	27	1.4	map	table

SNOW under 2 index extremes Help

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