May 2008

 

Overview

Table 1 is a summary of monthly averages and totals at selected stations throughout the state. Table 2 lists daily temperatures and precipitation for most of the locations listed in Table 1. In Table 3, monthly precipitation totals throughout the state are listed.

Basin Summary

Here is a summary of water indicators at the end of the month, by river basin:

Precipitation Stream Flow SWSI
BASIN

(1)

(2)
(3)
  (4)

(5)

(6)

OWYHEE 55 63 102 72 -45 -0.7
MALHEUR 126 74 110 29 67 -0.5
GRAND RONDE, POWDER, BURNT 136 116 113 158 239.5 -0.7
UMATILLA, WALLA WALLA, WILLOW 102 94 109 238 149 -0.4
UPPER JOHN DAY 73 86 107 178 121 1.1
UPPER DESCHUTES, CROOKED 122 87 113 135 237 0.9
LOWER DESCHUTES, HOOD RIVER 100 112 123 203 140 1.6
WILLAMETTE 56 100 109 162 47 1.5
ROGUE, UMPQUA 74 106 112 148 29 1.2
KLAMATH 131 96 108 103 -2 -0.9
LAKE COUNTY, GOOSE LAKE 184 103 97 101.5 88.5 -0.6
HARNEY 134 89 100 100 146 -0.2
NORTH COAST 47 92 76 106 -52 -0.3
SOUTH COAST 19 92 n.a. 76 -46 -1.6

n.a. Not available
(1) Percent of normal May precipitation, from NOAA Cooperative sites
(2) Percent of normal seasonal precipitation (since Oct. 1), from NOAA Cooperative sites
(3) Percent of normal seasonal precipitation, from Natural Resources Conservation Service (NRCS) SNOTEL sites
(4) Percent of normal May stream flow, from U.S. Geological Survey (USGS)
(5) Percent of normal seasonal stream flow (since Oct. 1), from USGS
(6) Surface Water Supply Index, from NRCS (-4 = very dry, 0 = normal, +4 = very wet)

 

 

Oregon Climate Service
Oregon State University, Strand 326
Corvallis, Oregon 97331
Phone: (541) 737-5705
Fax: (541) 737-5710
E-mail: oregon@coas.oregonstate.edu
Web: http://www.ocs.oregonstate.edu