CLIMATOLOGICAL DATA							HANFORD METEOROLOGY STATION 25 MILES N.W. OF RICHLAND, WA LATITUDE 46º 34'N, LONGITUDE 119º 36'W ELEVATION (GROUND) 733 FEET							MONTH: December 1997
	TEMPERATURE (ºF) (3-FT LEVEL)						PRECIPITATION			WIND (50-FT LEVEL)							FRONTS & MISC PHENOM
D A T E	M A X I M U M	M I N I M U M	A V E R A G E	D E P A R T U R E	H D D 65 ºF	C D D 65 ºF	T O T A L IN.	S N O W IN.	SNOW ON GRND AT 0400 IN.	P R E V A I L DIR	A V E SPD MPH	PK G U S T SPD MPH	PK G U S T DIR	A V E RH %	S O L A R A D	S K Y C V R SR TO SS	NOTE:TYPES AND TIMES OF FRONTAL PASSAGES "KFR"(COLD) "WFR"(WARM)
1	47	28	38	+3	27	0				NW	6.4	18	NW	86	98	9	F
2	41	23	32	-3	33	0				NW	4.3	15	NW	85	47	10	F
3	36	23	30	-5	35	0				W	3.9	11	WSW	94	61	10	F
4	33	22	28	-7	37	0				E	3.1	8	ESE	95	64	10	F
5	30	27	28	-6	37	0				SW	4.1	10	ENE	91	23	10	F
6	30	29	30	-4	35	0				NW	4.2	10	NNE	84	17	10
7	37	28	32	-1	33	0	0.29	1.8		S	4.1	12	WNW	88	51	10	F,KFR 2200
8	46	28	37	+4	28	0			1.6	W	7.9	28	W	76	64	10	F
9	46	26	36	+3	29	0	T	T	0.4	NW	6.4	16	WNW	71	130	0
10	43	32	38	+6	27	0	T	T	T	NW	5.8	14	NW	80	103	8
11	38	35	36	+4	29	0			T	SE	2.4	6	ESE	86	29	10
12	38	34	36	+4	29	0				E	3.0	7	E	85	23	10
13	34	27	30	-1	35	0				W	3.6	12	E	85	43	10
14	38	22	30	-1	35	0				NW	4.2	10	E	89	118	4
15	40	21	30	-1	35	0				NW	4.9	13	NW	95	60	10	F
16	60	38	49	+19	16	0	0.01			S	13.9	41	S	65	35	10	WFR 0200 KFR 1845
17	55	34	44	+14	21	0	0.01			SW	14.1	40	SSW	56	106	8
18	49	27	38	+8	27	0				SW	7.3	21	WNW	66	96	3
19	38	27	32	+2	33	0				NW	3.9	10	WNW	84	55	10
20	40	26	33	+3	32	0				W	4.8	16	WNW	86	48	10
21	46	21	34	+4	31	0				W	5.7	21	W	73	117	4
22	36	19	28	-2	37	0				NW	3.7	12	NW	83	106	8
23	36	22	29	-1	36	0				NW	4.3	11	WNW	92	52	8	F
24	39	30	34	+4	31	0				NW	5.1	12	WNW	82	73	10	F
25	33	31	32	+2	33	0				NW	2.6	8	WSW	84	11	10	F
26	33	25	29	-1	36	0				SE	3.4	14	NE	88	19	10	KFR 2015
27	51	25	38	+9	27	0				W	9.5	38	WSW	58	70	10
28	57	36	46	+17	19	0				W	6.8	22	WSW	59	44	10
29	58	34	46	+18	19	0				W	8.0	27	WSW	66	58	9
30	50	28	39	+11	26	0				NW	4.7	12	NW	85	134	9	F
31	37	26	32	+4	33	0				NW	3.4	11	W	97	22	10	F
SUM					941	0	0.31	1.8
AVG	41.8	27.5	34.7								5.5					8.7

NOTES:				PRECIPITATION (IN.)				MISC. PHENOM. KEY
Daily summary period is midnight to midnight PST				TOTAL FOR THE MONTH			0.31	A-Hail, BD-Blowing Dust, BS-Blowing Snow
"T" in columns 7-9 denotes a trace				DEPARTURE FROM NORM			-0.72	D-Dust, AU-Aurora, DL-Distant Lightning
Snow in columns 8-9 is all frozen precipitation				24HR MAX	0.29	ON	7	F-Fog, IC-Ice Crystals, K-Smoke
Solrad in column 15 is in Langleys; g-cal/sq. cm				NUMBER OF DAYS WITH:				GL-Glaze, T-Thunderstorm, DS-Drifting Snow
TEMPERATURE (ºF) (3-FT LEVEL)				>= T	6	>= 0.25	1	BAROMETRIC PRESSURE (IN.)
AVERAGE FOR THE MONTH			34.7	>= 0.01	3	>= 0.50	0	AVERAGE STATION			29.399
DEPARTURE FROM NORMAL			+3.3	>= 0.10	1	>= 1.00	0	MAX SEA-LEVEL	30.78	ON	11+
HIGHEST	60	ON	16	SNOW (FROZEN PRECIP.) (IN.)				MIN SEA-LEVEL	29.55	ON	7
LOWEST	19	ON	22	TOTAL FOR THE MONTH			1.8	SOLAR RADIATION (LANGLEYS)
NUMBER OF DAYS WITH:				24HR MAX	1.8	ON	1.87	AVERAGE DAILY TOTAL			63.8
MAXIMUM 32 OR BELOW			2	MAX ON GRND	1.8	ON	7	MAX DAILY	134	ON	30
MAXIMUM 90 OR ABOVE			0	WIND (50-FT LEVEL)				MIN DAILY	11	ON	25
MINIMUM 32 OR BELOW			25	AVERAGE SPEED (MPH)			5.5	MISCELLANEOUS NUMBER OF DAYS
MINIMUM 0 OR BELOW			0	DEPARTURE FROM NORM			-0.4	CLEAR	2	FOG	13
HEATING DEGREE DAYS (BASE 65ºF)				PEAK GUST	S @ 41	ON	16	PARTLY CLOUDY	2	THDR	0
TOTAL FOR THE MONTH			941	AVERAGE PSYCHROMETRIC DATA				CLOUDY	27	DUST	0
DEPARTURE FROM NORMAL			-101	DRY BULB (ºF)	35.0	WET BULB (ºF)	32.7	RELATIVE HUMIDITY EXTREMES (%)
SEASON TOTAL (SINCE JULY 1)			2006	REL. HUM. (%)	81.0	DEW PT.(ºF)	29.2	HIGHEST	100	ON	26+
SEASON DEPARTURE FROM NORM			-247	+ DENOTES LATEST OF MULTIPLE DAYS				LOWEST	36	ON	17