Wyoming – NRCS

Report #25                      Monday Morning Snow Report             May 26^th, 2009

This is the last Monday Morning Report for this year as most of the data is becoming suspect.  All the basins are down in percent of SWE compared to last week.  We have not received enough May snow storms.  The Belle Fourche was discounted as being melted out.  Last year at this time the state average was 126% with a low of 87% and a high of 206% of average.  This year the state average is 63% with a low of 37% and a high of 103% of average.  See the table & map below for more information.  Note: The map may differ slightly from the table depending upon how many stations were reporting at what time.

For those of you with INTERNET capability, this report and map showing SWE percentages for the state can be found at “http://www.wrds.uwyo.edu/wrds/nrcs/nrcs.html”

Figure 1 -- SNOW WATER EQUIVALENT AS PERCENT OF AVERAGE.  The following table shows the current, last year and preceding weeks' % of average snow water equivalent (SWE) amounts for Wyoming basins.  Average is based on all reporting SNOTEL sites in the basin, not the snow courses.  The reference period for average comparison is 1971-2000.

DRAINAGE BASIN	5/26/2009	5/18/2009	5/11/2009	5/26/2008	5/18/2008
SNAKE RIVER	90	115	123	129	124
UPPER YELLOWSTONE	103	124	125	148	135
WIND RIVER	69	98	118	114	100
BIGHORN BASIN	77	104	106	132	107
SHOSHONE	83	107	108	120	101
POWDER - TONGUE	57	109	109	206	142
BELLE FOURCHE	*	*	*	*	*
UPPER NORTH PLATTE	65	79	93	124	126
LOWER N PLATTE,SWT	59	83	100	126	115
LITTLE SNAKE RIVER	90	103	111	156	141
UPPER GREEN RIVER	70	91	102	87	82
LOWER GREEN RIVER	37	47	63	108	99
UPPER BEAR RIVER	30	63	89	94	99
Weighted State Average	63	93	102	126	114

* red = down * blue = up * green = even

For more information, contact:
Lee Hackleman or Terry Gonzales   (307) 233-6744, 6743

NRCS Snow Surveys
100 East B St., Room 3124
Casper, WY