'07-'08 GSL Water Year Report

2007-2008 Water Year Summary by Month
Month Normal Current Percent Summary
October 1.57 1.57 100% No Data
November 1.5 .49 35% Dry & mild
December 1.23 3.35 272% Wet, cold, snowy
January 1.37 1.3 95% Cold & snowy
February 1.33 1.24 93% Cold & snowy
March 1.91 1.34 70% Cool & dry
April 2.02 .75 37% Cool & dry
May 2.09 1.01 48% Cool & dry
June .77 .75 97% Cool & wet start / Hot & dry finish
July .72 .14 19% Hot & dry
August .76 .83 109% Hot & dry
September 1.33 .31 23% Warm & very dry
Annual 16.6 13.08 79% Dismal

 

 

Calendar Year (October '07 - September '08) Summary
Normal Annual Precipitation 16.6"
Where Did We End Up? 13.08"
Percentage of Normal 79%
Amount Short For The Calendar Year 4"

 

 

Water Year (October '07 - May '08) Summary
Normal Water-Year Precipitation 13.02"
Where Did We End Up? 11.05"
Percentage of Normal 85%
Amount Short for the Water Year 1.97"

 October 2007 Summary:  No Data

November 2007 Summary:  Dry and Mild / Mean average temperature was 2.3 degrees above normal / Warmest day on record was 75 degrees (12th warmest on record) / Precip was .91" below normal

December 2007 Summary:  Wet, Cold & Snowy / Mean average temperature was 3.2 degrees below normal / Precip was 2.12" above normal

January 2008 Summary:  Cold and Snowy / Mean average temperature was 5.3 degrees below normal / Precip was .07" below normal (95%)

February 2008 Summary:  Snowy and Cold / Mean average temperature was 1.3 degrees below normal / Precip was .09" below normal (93%)

March 2008 Summary:  Cool and Dry / Mean average temperature was 2.7 degrees below normal / Precip was .57" below normal (70%)

April 2008 Summary:  Cool and Dry / Mean average temperature was 3.8 degrees below normal / Precip was 1.27" below normal (37%)

May 2008 Summary:  Dry and Cool / Mean average temperature was 1.4 degrees below normal / Precip was 1.08" below normal (48%)

June 2008 Summary:  Cool, wet start.  Hot & dry finish / Mean average temperature was .9 degrees above normal / Precip was .02" belownormal (97%)

July 2008 Summary:  Hot & dry / Fifth warmest July on record / Mean average temperature was 4.4 degrees above normal / Precip was .58" below normal (19%)

August 2008 Summary:  Hot & dry until the last day / Mean average temperature was 2.2 degrees above normal / Precip was.07 above normal (109%)

September 2008 Summary:  Warm and very dry / Mean average temperature was 1.5 degrees above normal / Precip was 1.02" below normal (23%)

Direct Precipitation accounts for 50% of the water flowing into Great Salt Lake.  Spring Runoff from snowpack contributes for the other 50%

Winter started out well but dried out at the end.  Spring was very dry but cool.  Summer was somewhat warmer than normal but was very dry.

Snowpack, although good was all local snow from Great Salt Lake (Lake Effect). As the above charts show, the Pacific Northwest storms did not contribute moisture to the lake or snowpack.

Ground water reservoirs have been very dry as the mountain reservoirs began lower than normal also.  When the runoff came down it filled the reservoirs and was soaked up by dry ground down lower.  Lower river flows made little impact on filling the lake.

Bear River Drainage, which accounts for 60% of our runoff, was almost non-existent and dried up completly by June.

Weber/Ogden and Jordan River, each contributing 20% of our runoff, both flowed with near normal flows.  Jordan continued to flow into the lake with respectable flows much later into the year than normal and helped to stabilize the lake through June.

Direct precipitation to the lake, as shown above, was dismal this year.  Snowpack, which was high this year, drained into mountain reservoirs and was soaked into the ground rather than returning to Great Salt Lake.

The lake, which usually rises 2 feet from direct precipitation and spring runoff, only came up 6".

The lake, which usually evaporates 2 feet, had a normal evaporation cycle loosing 2 feet.

The high lake level for the 2007-2008 Water Year was 4196.1 and was acheived Late March.  This level maintained all spring due to colder than normal temperatures.  The lake usually tops out late March to mid April and begins to recede late May to early June.

The low lake level for the 2007-2008 Water Year was 4193.9 and was acheived mid October.  The lake usually bottoms out late October to early November.

Our net loss for the year was 1.4"