SEATTLE SEATTLE-TACOMA INTL A, WA - COOP Northwest station 457473

457473 - SEATTLE SEATTLE-TACOMA INTL A, Washington

Latitude
47° 28´N

Longitude
122° 19´W

Elevation
122 meters

10 nearest COOP Northwest stations

3 mi	N :	SEATTLE BOEING FIELD, WA
4 mi	SE :	KENT, WA
5 mi	W :	VASHON ISLAND, WA
6 mi	N :	SEATTLE CITY OFFICE, WA
8 mi	N :	SEATTLE PORTAGE BAY, WA
8 mi	N :	SEATTLE UNIV OF WASHINGT, WA
9 mi	N :	SEATTLE NAS, WA
9 mi	NNE :	SEATTLE SAND PT WSFO, WA
9 mi	SSW :	TACOMA 1, WA
10 mi	SSW :	TACOMA CITY HALL, WA

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

	Total observations	%	NDJFM observations	%
TMAX	18262	100.0%	7563	100.0%
TMIN	18262	100.0%	7562	100.0%
PRCP	18262	100.0%	7563	100.0%
SNOW	17803	97.5%	7349	97.2%

TMAX Help top of page

TMAX	observations	mean	std dev		Distribution	during extreme days of
NDJFM	7563 by year	48.2°F	7.0°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>=58°F	616	0.02	102	92	1.1	map	table
Extreme low events Days with TMAX<=38°F	614	-0.18	107	142	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>=58°F	616	0.99	260	9	28.9*	map	table
Extreme low events Days with TMAX<=38°F	614	-1.24	18	322	17.9*	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>=58°F	616	131	58	2.3*	map	table
Extreme low events Days with TMAX<=38°F	614	63	140	2.2*	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	7562 by year	36.9°F	6.7°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<=27°F	571	-0.06	119	132	1.1	map	table
Extreme high events Days with TMIN>=46°F	602	0.04	84	73	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<=27°F	571	-0.94	38	239	6.3*	map	table
Extreme high events Days with TMIN>=46°F	602	0.81	208	11	18.9*	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<=27°F	571	53	131	2.5*	map	table
Extreme high events Days with TMIN>=46°F	602	119	82	1.5*	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	7563 by year	0.17"		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"	4386	0.29"	0.02	737	701	1.1	map	table
Extreme events Days with PRCP>0.46"	865	0.83"	0.03	137	126	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"	4386	0.29"	-0.12	631	813	1.3*	map	table
Extreme events Days with PRCP>0.46"	865	0.83"	0.03	140	124	1.1	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"	4386	0.29"	699	787	1.1*	map	table
Extreme events Days with PRCP>0.46"	865	0.83"	129	163	1.3	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	7349 by year	0.08"		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"	353	1.59"	-0.18	59	75	1.3	map	table
Extreme events Days with SNOW>2.3"	70	4.68"	-0.36	9	17	1.9	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"	353	1.59"	-1.57	0	222	Inf*	map	table
Extreme events Days with SNOW>2.3"	70	4.68"	-1.84	0	54	Inf*	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"	353	1.59"	48	95	2.0*	map	table
Extreme events Days with SNOW>2.3"	70	4.68"	12	19	1.6	map	table

SNOW under 2 index extremes Help

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