Water Supply Report Card

Viewing a historical report for August 9, 2026. Latest available report: October 24, 2026.

Indicator	Grade	Compared with history	Measurement	Share of grade	Ranked against
Upper Reservoir Storage Explore the U.S. Bureau of Reclamation data for Upper Reservoir Storage (opens in a new tab) What this measures Water held in the seven mountain reservoirs that capture Weber Basin runoff. Willard Bay is not included here because of where it sits in the basin.	F	Critical	137,329 of 336,190 acre-feet	25%	23 years (2003–2025)
Total Reservoir Storage Explore the U.S. Bureau of Reclamation data for Total Reservoir Storage (opens in a new tab) What this measures Every reservoir in the system, Willard Bay included. Because storage moves slowly, this is compared against a seven-day window around today rather than this calendar day alone.	D-	Serious	243,219 of 583,379 acre-feet, compared against a seven-day window around this date	20%	23 years (2003–2025)
Precipitation Explore the USDA NRCS data for Precipitation (opens in a new tab) What this measures Rain and melted snow recorded across the basin, added up since the water year began on 1 October. It restarts at zero each October, so early-season figures are always small.	D+	Below Average	27.3 inches, accumulated since the water year began on 1 October	20%	47 years (1979–2025)
Soil Moisture Explore the USDA NRCS data for Soil Moisture (opens in a new tab) What this measures How saturated basin soils are, as a percentage. Dry soils soak up spring runoff before it can reach a reservoir, so a wet autumn helps next year's supply.	C-	Slightly Below Average	26.1% saturation	5%	21 years (2005–2025)
Temperature Explore the USDA NRCS data for Temperature (opens in a new tab) What this measures The average temperature over the last 14 days. Warm spells raise water demand and evaporation, so cooler than normal earns a better grade.	F	Much warmer than usual	66.6 degrees F, 14-day rolling average	30%	21 years (2005–2025)

Report card history

Every day from October 24, 2025 to October 24, 2026 scored the same way, so you can see how the year has moved. The dashed line is where a perfectly ordinary year would sit. The ringed point is August 9, 2026, the date shown above.

Each indicator over the same year

Upper Reservoir Storage F
Total Reservoir Storage D-
Precipitation D+
Soil Moisture C-
Temperature F

Best B on Oct 28, 2025
Lowest F on Aug 9, 2026

Reservoir levels

How full each Weber Basin reservoir was on August 9, 2026.

Pineview 32,938
Echo 28,424
Rockport 28,469
East Canyon 28,465
Lost Creek 8,236
Smith and Morehouse 6,853
Causey 3,944
Willard Bay 105,890
Empty 340,160
Usual for this date

Bigger tile, bigger reservoir. The colored part is the water in it now.
Usual level for this date
About usual or above
Below usual (60 to 90% of usual)
Well below usual (under 60% of usual)

Whole basin: 243,219 of 583,379 acre-feet stored, 42% full. Usual for August 9 is about 387,689, 66%.

Pineview 30% full

32,938 of 110,150 acre-feet

41 points below the usual 71% full
Echo 38% full

28,424 of 74,000 acre-feet

22 points below the usual 60% full
Rockport 46% full

28,469 of 62,120 acre-feet

37 points below the usual 83% full
East Canyon 56% full

28,465 of 51,200 acre-feet

18 points below the usual 74% full
Lost Creek 37% full

8,236 of 22,500 acre-feet

39 points below the usual 76% full
Smith and Morehouse 82% full

6,853 of 8,350 acre-feet

1 points above the usual 81% full
Causey 50% full

3,944 of 7,870 acre-feet

13 points below the usual 64% full
Willard Bay 43% full

105,890 of 247,189 acre-feet

17 points below the usual 60% full

Each reservoir keeps its own color, in the same order, in the whole-basin bar, its legend and its own bar below. Bigger reservoirs get longer bars, so the same percentage of a large reservoir and a small one never look alike. The marker on each bar is the median level this reservoir held on this calendar date across every year on record, and the figure beneath each bar is how many percentage points the level sits above or below that marker. Willard Bay is listed separately because of its location in the basin, which is why it is not included in the Upper Reservoir Storage totals. Each reservoir name links to its Bureau of Reclamation data page.

How this is calculated

Each indicator compares Weber Basin conditions on the report date with every other year on record for the same point in the year, then turns that ranking into a letter grade, the way a school report card would: an ordinary year earns a C, the best years on record earn an A, and the driest earn an F. Temperature is graded so that cooler than normal earns a better grade, because warm weather increases water demand and evaporation.

The overall grade is a weighted blend of the indicators. Weights change by season, so snowpack matters most in winter and spring, and the two reservoir measures together carry the most weight in summer and fall. Snowpack does not count from June through November, when there is little or no snow on the ground to measure. Indicators without data for a date are left out and the remaining weights are rebalanced.

Share of the overall grade by season
Indicator	Summer DrawdownJun–Sep (now)	Fall RechargeOct–Nov	Snow AccumulationDec–Mar	Spring RunoffApr–May
Upper Reservoir Storage	25%	25%	15%	20%
Total Reservoir Storage	20%	20%	15%	10%
Precipitation	20%	20%	10%	10%
Snow Water Equivalent	0%	0%	35%	30%
Soil Moisture	5%	15%	10%	15%
Temperature	30%	20%	15%	15%

Snow Accumulation: the snowpack is next summer's water supply, so it carries the most weight.
Spring Runoff: melting snow refills the reservoirs, so snowpack and storage share the lead.
Summer Drawdown: there is no snow left to measure, so storage and heat, which drives demand and evaporation, carry the grade.
Fall Recharge: storage carries over into the new water year, while precipitation and soil moisture set up next spring's runoff.

Sources: U.S. Bureau of Reclamation reservoir data and USDA NRCS Weber-Ogden basin data. Each indicator in the table links to its own source page.