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 1998
	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	54	35	44	+9	21	0				S	14.7	40	SSW	65	19	10
2	55	34	44	+9	21	0	0.02			SW	15.6	47	SSW	66	50	10	KFR 0200
3	48	27	38	+3	27	0				W	6.1	14	WSW	68	148	0
4	43	23	33	-2	32	0				W	4.2	10	SSE	80	155	0
5	35	18	26	-8	39	0	T	T		SE	5.6	20	SSE	92	33	10	F,KFR 1800
6	32	19	26	-8	39	0				N	3.5	11	SW	96	78	9	F
7	47	26	36	+3	29	0	T	T		SW	8.7	38	S	78	40	10	F,KFR 1800
8	49	27	38	+5	27	0				W	8.4	22	WNW	65	133	3
9	38	23	30	-3	35	0				NW	5.6	13	WNW	88	94	9
10	35	26	30	-2	35	0	T			NW	3.7	11	NW	91	30	10
11	36	29	32	0	33	0	0.06			NW	4.6	11	WNW	93	31	10	F
12	42	26	34	+2	31	0	0.09			NW	5.7	12	NW	96	44	10	F
13	52	37	44	+13	21	0	0.09			NW	7.3	25	W	88	38	10	WFR 0330 KFR 1540
14	50	28	39	+8	26	0				NW	8.7	23	W	57	142	4
15	45	28	36	+5	29	0				NW	3.7	8	WNW	80	103	8
16	45	26	36	+6	29	0				NW	3.9	10	NW	86	124	7
17	57	23	40	+10	25	0	T	T		NW	7.0	34	NNW	70	142	1	F,KFR 1510
18	41	20	30	0	35	0	T	T		NE	11.7	30	NE	48	118	3
19	24	14	19	-11	46	0				NE	11.7	28	NE	38	110	5
20	19	2	10	-20	55	0				NE	11.6	27	NE	36	141	0
21	18	-1	8	-22	57	0				W	4.7	10	ENE	60	86	9
22	20	1	10	-20	55	0				W	4.2	9	E	62	134	2
23	21	4	12	-18	53	0	T	T		W	5.7	13	NW	64	73	10
24	22	15	18	-12	47	0	0.07	0.9	0.2	N	3.6	12	N	83	77	10
25	42	12	27	-3	38	0	0.09		0.7	NW	4.1	30	WNW	88	22	10	F,IP,GL,KFR 2330
26	50	36	43	+13	22	0			0.3	W	14.3	55	WSW	54	107	9
27	53	32	42	+13	23	0	T			SW	11.6	51	SW	71	12	10	WFR 2150
28	59	46	52	+23	13	0	T			SW	14.8	40	SW	64	100	10
29	60	41	50	+22	15	0	0.01			SW	11.3	35	SSW	74	87	9	F
30	53	36	44	+16	21	0				NW	6.7	18	WNW	71	124	10
31	52	36	44	+16	21	0	0.01			NW	8.3	20	NNW	69	114	5
SUM					1000	0	0.44	0.9
AVG	41.8	24.2	33.0								7.8					7.2

NOTES:				PRECIPITATION (IN.)				MISC. PHENOM. KEY
Daily summary period is midnight to midnight PST				TOTAL FOR THE MONTH			0.44	A-Hail, BD-Blowing Dust, BS-Blowing Snow
"T" in columns 7-9 denotes a trace				DEPARTURE FROM NORM			-0.59	D-Dust, AU-Aurora, DL-Distant Lightning
Snow in columns 8-9 is all frozen precipitation				24HR MAX	0.16	ON	12-13	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	16	>= 0.25	0	BAROMETRIC PRESSURE (IN.)
AVERAGE FOR THE MONTH			33.0	>= 0.01	8	>= 0.50	0	AVERAGE STATION			29.387
DEPARTURE FROM NORMAL			+1.6	>= 0.10	0	>= 1.00	0	MAX SEA-LEVEL	30.81	ON	22
HIGHEST	60	ON	29	SNOW (FROZEN PRECIP.) (IN.)				MIN SEA-LEVEL	29.45	ON	2
LOWEST	-1	ON	21	TOTAL FOR THE MONTH			0.9	SOLAR RADIATION (LANGLEYS)
NUMBER OF DAYS WITH:				24HR MAX	0.9	ON	24	AVERAGE DAILY TOTAL			87.4
MAXIMUM 32 OR BELOW			7	MAX ON GRND	0.9	ON	24	MAX DAILY	155	ON	4
MAXIMUM 90 OR ABOVE			0	WIND (50-FT LEVEL)				MIN DAILY	12	ON	27
MINIMUM 32 OR BELOW			23	AVERAGE SPEED (MPH)			7.8	MISCELLANEOUS NUMBER OF DAYS
MINIMUM 0 OR BELOW			1	DEPARTURE FROM NORM			+1.9	CLEAR	7	FOG	8
HEATING DEGREE DAYS (BASE 65ºF)				PEAK GUST	WSW @ 55	ON	26	PARTLY CLOUDY	4	THDR	0
TOTAL FOR THE MONTH			1000	AVERAGE PSYCHROMETRIC DATA				CLOUDY	20	DUST	0
DEPARTURE FROM NORMAL			-42	DRY BULB (ºF)	33.3	WET BULB (ºF)	30.3	RELATIVE HUMIDITY EXTREMES (%)
SEASON TOTAL (SINCE JULY 1)			1990	REL. HUM. (%)	72.3	DEW PT.(ºF)	24.5	HIGHEST	100	ON	6
SEASON DEPARTURE FROM NORM			-263	+ DENOTES LATEST OF MULTIPLE DAYS				LOWEST	22	ON	20