2012-2013 Wyoming Water Year Summary

The official water year begins Oct 1.  Riverton Forecast Office

 has prepared a comprehensive  review of the water Year that

 just ended.   For comparison the CoCoRaHS site at Star Valley

Ranch received  24.18 inches of precipitation which included 

172.5 inches of snow. This amount exceeds any of the stations

reporting with Old Faithful being next  with 22.61 

and coincidently exactly the same amount of snow of 172.5 inches.

2012-13 Water Year Precipitation and Percent of Normal for Selected Stations
2012 and Water Year 2011-2012 Precipitation Totals More Historical Climate Data from Utah State
Station Name								Drought Conditions					Oct 2012	Nov 2012	Dec 2012		Jan 2013	Feb 2013	Mar 2013	Apr 2013	May 2013	Jun 2013	Jul 2013	Aug 2013	Sep 2013		Total for Water Year to Date
click on location											D0	D1
for graph								D2		D3		D4
Big Piney								D2					0.24	0.15	0.04		0.07	0.09	0.03	0.25	1.26	T	0.89	0.41	0.83		4.26
1981-2010 Normals													0.53	0.21	0.30		0.31	0.35	0.44	0.53	0.84	0.79	0.71	0.69	0.78		6.48
Percent of Normal													45	71	13		23	26	7	47	150	0	125	59	106		66
Buffalo								D1					0.77	0.75	0.08		0.48	0.13	0.08	0.83	1.61	0.95	0.11	0.23	3.34		9.36
1981-2010 Normals													0.93	0.54	0.40		0.42	0.35	0.92	1.30	2.53	2.28	1.66	0.81	1.31		13.45
Percent of Normal													83	139	20		114	37	9	64	64	42	7	28	255		70
Casper								D1					0.56	0.49	0.39		0.27	0.50	0.85	2.54	1.81	0.87	1.66	0.70	1.47		12.11
1981-2010 Normals													1.11	0.76	0.49		0.51	0.57	0.82	1.29	2.02	1.61	1.41	0.85	1.08		12.52
Percent of Normal													50	64	80		53	88	104	197	90	54	118	82	136		97
Snowfall													5.2	7.5	6.0		4.5	9.5	10.5	39.0	3.5	0.0	0.0	0.0	4.8		90.5
1981-2010 Normals													7.4	10.3	11.0		9.1	9.8	10.9	11.6	2.9	0.1	0.0	0.0	1.8		74.9
Percent of Normal													70	73	55		49	97	96	336	121	0	0	0	267		121
Evanston								D1					1.59	0.52	0.12		0.11	0.36	0.41	0.92	0.21	T	0.20	0.16	1.48		6.08
1981-2010 Normals													1.17	1.04	0.58		0.54	0.61	0.86	1.15	1.77	1.24	0.61	0.96	1.31		11.84
Percent of Normal													136	50	21		20	59	48	80	12	0	33	17	113		51
Greybull								D1					0.06	0.21	0.13		0.28	0.14	0.09	0.38	1.01	0.40	0.32	T	1.11		4.13
1981-2010 Normals													0.60	0.30	0.28		0.23	0.18	0.40	0.71	1.65	1.20	0.66	0.42	0.88		7.51
Percent of Normal													10	70	46		122	78	23	54	61	33	48	0	126		55
Lander								D0					0.68	0.49	0.40		0.70	1.28	0.42	3.14	1.98	0.05	0.28	0.01	3.78		13.21
1981-2010 Normals													1.29	0.86	0.58		0.41	0.58	1.16	1.87	2.20	1.27	0.78	0.61	1.05		12.66
Percent of Normal													53	57	69		171	221	36	168	90	4	36	2	360		104
Snowfall													5.6	4.8	5.3		12.7	23.8	5.1	43.3	10.5	0.0	0.0	0.0	4.1		115.2
1981-2010 Normals													9.8	13.1	10.1		7.6	10.3	16.1	16.8	4.8	0.1	0.0	0.0	2.7		91.4
Percent of Normal													57	37	52		167	231	32	258	219	0	0	0	152		126
Riverton								D0					0.34	0.32	0.41		0.11	0.54	0.11	1.30	1.38	0.05	0.54	0.03	3.01		8.14
1981-2010 Normals													0.89	0.50	0.32		0.24	0.27	0.55	1.30	1.72	1.28	0.89	0.57	0.90		9.43
Percent of Normal													38	64	128		46	200	20	100	80	4	61	5	334		86
Snowfall													1.1	1.4	4.8		2.7	8.8	1.1	15.9	2.4	0.0	0.0	0.0	7.3		45.5
Rock Springs								D2					0.07	0.17	0.20		0.05	0.32	0.19	0.37	0.56	T	0.21	0.50	1.37		4.01
1981-2010 Normals													0.87	0.49	0.50		0.45	0.48	0.68	0.91	1.21	0.79	0.64	0.62	0.92		8.56
Percent of Normal													8	35	40		11	67	28	41	46	0	33	81	149		47
Sheridan								D0					0.95	1.09	0.50		0.96	0.79	0.27	2.27	3.03	2.19	0.43	0.05	4.26		16.79
1981-2010 Normals													1.41	0.71	0.56		0.56	0.54	0.98	1.60	2.35	2.12	1.18	0.72	1.43		14.16
Percent of Normal													67	154	89		171	146	28	142	129	103	36	7	298		119
Worland								D1					0.26	0.60	0.26		0.13	0.26	0.20	0.98	1.12	0.09	0.30	0.13	2.63		6.96
1981-2010 Normals													0.69	0.35	0.23		0.23	0.19	0.46	0.86	1.42	1.15	0.71	0.43	0.85		7.57
Percent of Normal													38	171	113		57	137	43	114	79	8	42	30	309		92
Station Name												Drought Conditions	Oct 2012	Nov 2012	Dec 2012		Jan 2013	Feb 2013	Mar 2013	Apr 2013	May 2013	Jun 2013	Jul 2013	Aug 2013	Sep 2013		Total for Water Year to Date
Afton								D1					1.50	1.40	2.13		0.84	0.68	1.30	2.00	2.43	0.10	1.53	0.40	2.81		17.12
1981-2010 Normals													1.63	2.04	1.25		1.40	1.09	1.40	1.54	2.26	1.97	1.43	1.25	1.46		18.16
Percent of Normal													92	95	170		60	62	93	130	108	5	107	32	192		94
Snowfall													7.0	12.8	31.1		16.8	15.3	13.7	7.0	1.0	0.0	0.0	0.0	0.3		105.0
Bitter Creek 4NE								D2					0.38	0.34	0.18		0.30	0.59	0.22	0.50	0.63	0.02	0.15	0.28	1.29		4.88
1981-2010 Normals													0.66	0.31	0.51		0.28	0.36	0.30	0.65	1.09	0.70	0.60	0.75	0.73		6.94
Percent of Normal													58	110	35		107	164	73	77	58	3	25	37	177		70
Cody								D0					0.34	0.52	0.59		0.30	0.19	0.31	0.95	3.22	0.35	0.76	0.38	2.54		10.45
1981-2010 Normals													0.89	0.48	0.33		0.33	0.33	0.56	1.06	1.82	1.68	1.11	0.91	1.06		10.56
Percent of Normal													38	108	179		91	58	55	90	177	21	68	42	240		99
Snowfall													0.0	3.0	6.0		4.0	3.0	1.0	7.2	0.0	0.0	0.0	0.0	0.0		24.2
1981-2010 Normals													4.3	6.3	8.0		7.8	6.7	6.9	6.3	0.8	0.0	0.0	0.0	0.2		47.3
Percent of Normal													0	48	75		51	45	14	114	0	0	0	0	0		51
Dubois								D0					1.53	0.48	0.31		0.35	0.33	0.46	0.60	1.57	0.05	1.22	0.60	3.17		10.67
1981-2010 Normals													0.81	0.57	0.28		0.24	0.38	0.40	1.10	1.64	1.28	1.11	0.86	1.24		9.91
Percent of Normal													189	84	111		146	87	115	55	96	4	110	70	256		108
Snowfall													5.3	5.0	5.5		7.0	7.3	6.5	10.0	0.5	0.0	0.0	0.0	3.5		50.6
1981-2010 Normals													3.0	5.8	5.1		3.9	5.7	6.0	8.5	3.9	0.6	0.0	0.0	2.6		45.1
Percent of Normal													177	86	108		179	128	108	118	13	0	0	0	135		112
Fossil Butte National Monument								D2					1.62	0.81	1.69		0.19	0.66	0.39	0.64	1.33	0.06	0.49	0.71	2.77		11.36
1981-2010 Normals													1.11	0.86	0.74		0.49	0.68	0.82	0.98	1.41	1.03	0.85	0.93	1.10		11.00
Percent of Normal													146	94	228		39	97	48	65	94	6	58	76	252		103
Snowfall													10.0	6.5	18.6		6.1	12.4	6.8	9.9	T	0.0	0.0	0.0	T		70.3
Green River								D2					1.00	1.05	0.97		0.10	0.55	0.45	0.75	1.41	0.05	0.05	0.55	2.09		9.02
1981-2010 Normals													0.81	0.41	0.44		0.34	0.43	0.71	0.85	1.23	0.98	0.55	0.68	0.90		8.33
Percent of Normal													123	256	220		29	128	63	88	115	5	9	81	232		108
Snowfall													4.0	5.0	8.3		1.3	5.2	3.5	4.3	T	0.0	0.0	0.0	T		31.6
1981-2010 Normals													0.5	3.8	6.5		4.6	7.3	5.0	3.9	0.6	0.0	0.0	0.0	0.0		32.2
Percent of Normal													800	132	128		28	71	70	110	0	0	0	0	0		98
Jeffrey City								D0					0.43	0.31	0.20		0.06	0.99	0.15	2.13	2.64	0.08	0.24	0.21	3.18		10.62
1981-2010 Normals													0.91	0.59	0.42		0.31	0.41	0.86	1.27	1.85	1.15	0.89	0.60	0.80		10.06
Percent of Normal													47	53	48		19	241	17	168	143	7	27	35	398		106
Snowfall													3.0	2.0	3.0		1.0	12.0	2.0	26.0	6.0	0.0	0.0	0.0	9.0		64.0
1981-2010 Normals													7.3	6.6	5.5		4.6	6.7	9.4	10.2	4.9	0.4	0.0	0.0	1.4		57.0
Percent of Normal													41	30	55		22	179	21	255	122	0	0	0	643		112
Kaycee								D1					0.28	0.75	0.19		0.26	0.07	0.59	1.25	1.13	0.56	0.60	0.43	2.32		8.43
1981-2010 Normals													1.04	0.57	0.31		0.30	0.34	0.74	1.46	2.37	1.84	1.42	0.80	1.18		12.37
Percent of Normal													27	132	61		87	21	80	86	48	30	42	54	197		68
Snowfall													0.1	4.0	6.0		3.0	3.0	3.0	15.5	T	0.0	0.0	0.0	4.0		38.6
1981-2010 Normals													1.5	4.2	6.0		5.9	6.3	8.0	4.7	0.6	0.1	0.0	0.0	0.2		37.5
Percent of Normal													7	95	100		51	48	38	330	0	0	0	0	2000		103
Moose								D1					2.16	2.19	3.70		1.17	0.74	1.23	1.79	1.59	0.22	1.70	0.49	2.59		19.57
1981-2010 Normals													1.47	2.64	2.67		2.58	1.82	1.62	1.49	1.88	1.61	1.29	1.29	1.44		21.80
Percent of Normal													147	83	139		45	41	76	120	85	14	132	38	180		90
Snowfall													1.8	10.2	33.9		19.7	19.5	13.1	7.0	2.6	0.0	0.0	0.0	T		107.8
1981-2010 Normals													4.8	24.1	44.7		36.9	26.6	15.9	7.4	2.2	0.0	0.0	0.0	0.2		162.8
Percent of Normal													38	42	76		53	73	82	95	118	0	0	0	0		66
Old Faithful								D0					2.64	1.31	4.29		1.68	0.49	2.01	2.46	1.27	0.98	0.65	0.97	3.86		22.61
1981-2010 Normals													1.66	2.29	3.16		2.11	1.99	2.21	2.21	2.80	2.47	1.55	1.46	1.46		25.37
Percent of Normal													159	57	136		80	25	91	111	45	40	42	66	264		89
Snowfall													14.0	11.5	49.5		38.5	9.0	27.0	21.0	T	0.0	0.0	0.0	2.0		172.5
1981-2010 Normals													7.7	31.7	43.8		37.5	31.1	26.8	19.3	7.3	1.2	0.0	0.0	1.4		207.8
Percent of Normal													182	36	113		103	29	101	109	0	0	0	0	143		83
Powell Field Station								D0					0.24	0.09	0.15		0.29	0.07	0.15	0.39	1.99	0.16	1.45	0.26	2.27		7.51
1981-2010 Normals													0.56	0.18	0.13		0.21	0.13	0.29	0.51	1.40	1.35	0.87	0.52	0.65		6.80
Percent of Normal													43	50	115		138	54	52	76	142	12	167	50	349		110
Snowfall													0.0	1.0	2.0		2.6	T	T	1.0	0.0	0.0	0.0	0.0	0.0		6.6
1981-2010 Normals													1.2	1.3	1.2		2.3	0.5	2.5	0.5	0.5	0.0	0.0	0.0	0.1		10.1
Percent of Normal													0	77	167		113	0	0	200	0	0	0	0	0		65
Riverton (downtown)								D0					0.36	0.52	0.35		0.21	0.45	0.17	1.48	1.54	0.02	0.38	0.05	3.09		8.62
1981-2010 Normals													0.85	0.41	0.24		0.28	0.33	0.56	0.98	1.45	1.21	0.78	0.50	0.83		8.42
Percent of Normal													42	127	146		75	136	30	151	106	2	49	10	372		102
Snowfall													3.2	3.5	6.1		3.8	8.9	4.3	24.7	6.7	0.0	0.0	0.0	5.7		66.9
1981-2010 Normals													3.7	4.3	4.8		4.8	6.0	5.9	6.1	1.2	0.0	0.0	0.0	0.3		37.1
Percent of Normal													86	81	127		79	148	73	405	558	0	0	0	1900		180
Thermopolis								D1					0.66	0.17	0.38		0.37	0.59	0.51	1.33	2.72	0.19	0.26	0.09	3.16		10.43
1981-2010 Normals													1.26	0.80	0.46		0.35	0.45	0.87	1.46	1.86	1.51	0.88	0.58	1.23		11.71
Percent of Normal													52	21	83		106	131	59	91	146	13	30	16	257		89
Snowfall													1.0	6.0	4.0		5.5	5.0	2.0	11.5	T	0.0	0.0	0.0	2.0		37.0
1981-2010 Normals													2.4	3.7	4.5		5.6	4.6	2.5	2.8	0.4	0.0	0.0	0.0	0.2		26.7
Percent of Normal													42	162	89		98	109	80	411	0	0	0	0	1000		139
XX.X / M - Data partially or completely missing

Wyoming Climate Statewide averages and ranks for periods including September 2013 will be available on October 15, 2013

Last Month

Precipitation - Percent of Normal

Temperature - Departure from Normal

Statewide Average (inches)

Statewide Average (°F)

20th Century Average

20th Century Average

Rank - Driest to Wettest (119 Years)

Rank - Warmest to Coldest (119 Years)

Driest Year on Record: 1944

Warmest Year on Record: 2003

Last 3 Months

Precipitation - Percent of Normal

Temperature - Departure from Normal

Statewide Average (inches)

Statewide Average (°F)

20th Century Average

20th Century Average

Rank - Driest to Wettest (119 Years)

Rank - Warmest to Coldest (119 Years)

Driest Year on Record: 2012

Warmest Year on Record: 2012

Water Year

Precipitation - Percent of Normal

Temperature - Departure from Normal

Statewide Average (inches)

Statewide Average (°F)

20th Century Average

20th Century Average

Rank - Driest to Wettest (119 Years)

Rank - Warmest to Coldest (119 Years)

Driest Period on Record: Oct 1918 - Aug 1919

Warmest Period on Record: Oct 1933 - Aug 1934

Last 12 Months

Precipitation - Percent of Normal

Temperature - Departure from Normal

Statewide Average (inches)

Statewide Average (°F)

20th Century Average

20th Century Average

Rank - Driest to Wettest (119 Years)

Rank - Warmest to Coldest (119 Years)

Driest Period on Record: Sep 1987 - Aug 1988

Warmest Period on Record: Aug 1933 - Aug 1934