BLACKWATER DAM, NH - COOP Northeast station 270741

270741 - BLACKWATER DAM, New Hampshire

Latitude
43° 19´N

Longitude
71° 43´W

Elevation
183 meters

10 nearest COOP Northeast stations

1 mi	SE :	WEBSTER, NH
8 mi	NNE :	FRANKLIN JUNCTION, NH
9 mi	N :	WEBSTER SUBSTN, NH
10 mi	NNE :	EASTMAN FALLS DAM, NH
10 mi	NNE :	FRANKLIN, NH
11 mi	NNE :	FRANKLIN FALLS DAM, NH
11 mi	ENE :	SALISBURY, NH
12 mi	SSW :	WEST HENNIKER, NH
14 mi	SE :	CONCORD MUNICIPAL ARPT, NH
14 mi	NW :	WILMOT, NH

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

	Total observations	%	NDJFM observations	%
TMAX	15431	84.5%	6454	85.3%
TMIN	15434	84.5%	6464	85.5%
PRCP	15708	86.0%	6490	85.8%
SNOW	15608	85.5%	6469	85.5%

TMAX Help top of page

TMAX	observations	mean	std dev		Distribution	during extreme days of
NDJFM	6454 by year	37.0°F	11.9°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>=56°F	438	0.29	86	30	2.9*	map	table
Extreme low events Days with TMAX<=19°F	435	-0.17	83	104	1.3	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>=56°F	438	-0.19	33	57	1.7*	map	table
Extreme low events Days with TMAX<=19°F	435	0.25	100	63	1.6*	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>=56°F	438	56	93	1.7*	map	table
Extreme low events Days with TMAX<=19°F	435	51	74	1.5	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	6464 by year	16.7°F	13.3°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<=-5°F	452	0.03	103	89	1.2	map	table
Extreme high events Days with TMIN>=34°F	440	0.05	54	48	1.1	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<=-5°F	452	0.06	91	85	1.1	map	table
Extreme high events Days with TMIN>=34°F	440	-0.01	45	56	1.2	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<=-5°F	452	53	72	1.4	map	table
Extreme high events Days with TMIN>=34°F	440	49	89	1.8*	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	6490 by year	0.12"		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"	2345	0.33"	-0.11	317	407	1.3*	map	table
Extreme events Days with PRCP>0.55"	462	1.00"	-0.16	58	79	1.4	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"	2345	0.33"	-0.05	375	428	1.1	map	table
Extreme events Days with PRCP>0.55"	462	1.00"	0.19	90	58	1.6*	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"	2345	0.33"	335	459	1.4*	map	table
Extreme events Days with PRCP>0.55"	462	1.00"	78	81	1.0	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	6469 by year	0.46"		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"	1114	2.65"	-0.19	169	245	1.4*	map	table
Extreme events Days with SNOW>4.2"	220	6.91"	-0.33	26	51	2.0*	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"	1114	2.65"	-0.04	202	216	1.1	map	table
Extreme events Days with SNOW>4.2"	220	6.91"	0.19	50	36	1.4	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"	1114	2.65"	144	220	1.5*	map	table
Extreme events Days with SNOW>4.2"	220	6.91"	37	36	1.0	map	table

SNOW under 2 index extremes Help

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