Water Supply Precipitation Summary

Weekly Divisional Precipitation Summary

Click on date to display a different weekly forecast:

04/29/2008 04/22/2008 04/15/2008 04/08/2008 03/25/2008 03/18/2008 03/12/2008 03/11/2008 02/26/2008 02/20/2008 02/19/2008 02/13/2008 02/12/2008 01/30/2008 01/29/2008 01/23/2008 01/22/2008 01/16/2008 01/08/2008 12/26/2007 12/18/2007 12/11/2007 11/27/2007 11/20/2007 11/13/2007 10/23/2007 10/16/2007 10/09/2007 09/25/2007 09/21/2007 09/11/2007 08/28/2007 08/21/2007 08/14/2007 07/24/2007 07/18/2007 07/17/2007 07/10/2007 06/26/2007 06/19/2007 06/12/2007 05/29/2007 05/23/2007 05/15/2007 05/08/2007 04/24/2007 04/17/2007 04/10/2007 03/27/2007 03/20/2007 03/13/2007 02/27/2007 02/20/2007 02/13/2007 01/23/2007 01/16/2007 01/09/2007 12/26/2006 12/19/2006 12/12/2006 11/28/2006 11/21/2006 11/14/2006 11/07/2006 10/24/2006 10/17/2006 10/12/2006 09/26/2006 09/19/2006 09/12/2006 08/29/2006 08/22/2006 08/16/2006 08/09/2006 07/25/2006 07/18/2006 07/11/2006 06/27/2006 06/20/2006 06/13/2006 05/30/2006 05/23/2006 05/16/2006 05/09/2006 04/18/2006 04/11/2006 03/28/2006 03/21/2006 03/14/2006 03/07/2006 02/21/2006 02/14/2006 02/08/2006 01/24/2006 12/13/2005 12/06/2005 11/29/2005 11/28/2005 11/22/2005 11/15/2005 08/09/2005 07/26/2005 07/19/2005 07/12/2005 06/14/2005 06/07/2005 05/24/2005 05/17/2005 05/11/2005 04/26/2005 04/19/2005 04/12/2005 03/29/2005 03/22/2005 03/15/2005 03/09/2005 02/23/2005 02/15/2005 02/08/2005 01/26/2005 01/19/2005 01/12/2005 12/28/2004 12/22/2004 12/16/2004 12/15/2004 12/08/2004 11/24/2004 11/17/2004 11/09/2004 10/27/2004 10/20/2004 10/13/2004 09/28/2004 09/21/2004 09/15/2004 09/08/2004 08/24/2004 08/17/2004 08/10/2004 07/27/2004 07/20/2004 07/15/2004 07/13/2004 06/29/2004 06/22/2004

 Columbia Basin Seasonal Precipitation Division Averages  
 Northwest River Forecast Center 


 (Weekly Summary: 12Z apr 1 - 28, 2008) 

  DIVISION               ..APR TO DAY 28..   ....OCT - APR.... 
                          OBSD  DEP  PCT AV    OBSD   DEP  PCT AV 

 COLUMBIA ABOVE COULEE   1.03  -0.51  67.    16.02   0.23 101. 
 SNAKE RV AB ICE HARBOR  0.72  -0.64  53.    12.04   0.39 103. 
 COLUMBIA AB THE DALLES  0.91  -0.62  59.    16.04   0.22 101. 
 COLUMBIA AB CASTLEGAR   1.63  -0.23  87.    22.96   0.71 103. 
 KOOTENAI                1.06  -0.58  65.    15.49  -0.73  96. 
 CLARK FORK              0.62  -0.54  53.    10.81   0.67 107. 
 FLATHEAD                1.07  -0.41  72.    13.25  -0.40  97. 
 PEND OREILLE/ SPOKANE   1.31  -0.80  62.    23.28   0.98 104. 
 NORTHEAST WASHINGTON    0.86  -0.56  60.    11.26  -0.98  92. 
 OKANOGAN                0.39  -0.57  41.     9.25  -0.68  93. 
 EAST SLOPES WASH CASC.  1.01  -0.97  51.    30.62  -2.97  91. 
 CENTRAL WASHINGTON      0.18  -0.41  31.     4.75  -1.76  73. 
 UPPER SNAKE             0.76  -0.73  51.    15.75   2.91 123. 
 SNAKE RIVER PLAIN       0.29  -0.69  29.     5.89  -1.19  83. 
 OWYHEE/ MALHEUR         0.47  -0.44  52.     6.51  -0.94  87. 
 SALMON/ BOISE/ PAYETTE  0.76  -0.73  51.    15.06   0.79 106. 
 BURNT/ GRANDE RONDE     0.50  -0.77  39.    10.80  -0.08  99. 
 CLEARWATER              1.70  -0.79  68.    21.64   0.55 103. 
 SOUTHEAST WASHINGTON    0.69  -0.87  44.    11.96  -2.08  85. 
 UPPER JOHN DAY          0.62  -0.55  53.    10.07   0.21 102. 
 UMATILLA/ LWR JOHN DAY  0.81  -0.59  58.    13.60   1.85 116. 
 UPR DESCHUTES/ CROOKED  0.47  -0.45  51.    10.47  -0.39  96. 
 HOOD/ LOWER DESCHUTES   1.30  -0.70  65.    26.06   2.53 111. 
 NW SLOPE WASH CASCADES  3.92  -1.88  68.    64.31  -6.96  90. 
 SW WA CASCADES/COWLITZ  3.24  -1.75  65.    54.05  -4.41  92. 
 WILLAMETTE VALLEY       3.62  -0.89  80.    52.11   2.33 105. 
 ROGUE/ UMPQUA           1.52  -1.07  59.    32.09   1.68 106. 
 KLAMATH BASIN           0.51  -0.64  44.    14.59  -0.22  99. 
 LAKE COUNTY-GOOSE LAKE  0.29  -0.80  26.     6.62  -2.11  76. 
 HARNEY/ MALHEUR BASIN   0.38  -0.61  39.     6.40  -1.26  84. 

 This precipitation summary for the Columbia River Basin is based on an 
 analysis using a limited number of reporting stations. Final values 
 depicted in this narrative are prorated by the number of elapsed days  
 in the month. 

 Precipitation normals are based on 1971-2000 historical data. 

 Please contact NWRFC for further information: (503) 326-7291. 
    
$$ 

Monthly Divisional Precipitation Summary

Click on date to display forecast:

4/2008 3/2008 2/2008 1/2008 1/2008 12/2007 11/2007 10/2007 9/2007 8/2007 7/2007 6/2007 5/2007 4/2007 3/2007 2/2007 2/2007 1/2007 12/2006 11/2006 10/2006 9/2006 8/2006 7/2006 6/2006 5/2006 4/2006 3/2006 2/2006 1/2006 11/2005 7/2005 6/2005 5/2005 4/2005 3/2005 2/2005 1/2005 12/2004 11/2004 10/2004 9/2004 8/2004 7/2004 6/2004

 Columbia Basin Seasonal Precipitation Division Averages  
 Northwest River Forecast Center 


 (Monthly Summary - apr 2008)  

  DIVISION               ..APR TO DAY 30..   ....OCT - APR.... 
                          OBSD  DEP  PCT AV    OBSD   DEP  PCT AV 

 COLUMBIA ABOVE COULEE   1.17  -0.48  71.    16.17   0.27 102. 
 SNAKE RV AB ICE HARBOR  1.14  -0.32  78.    12.46   0.71 106. 
 COLUMBIA AB THE DALLES  1.25  -0.39  76.    16.39   0.46 103. 
 COLUMBIA AB CASTLEGAR   1.92  -0.08  96.    23.25   0.87 104. 
 KOOTENAI                1.09  -0.66  62.    15.52  -0.82  95. 
 CLARK FORK              0.85  -0.39  69.    11.05   0.82 108. 
 FLATHEAD                1.43  -0.15  91.    13.62  -0.14  99. 
 PEND OREILLE/ SPOKANE   2.02  -0.24  89.    23.99   1.54 107. 
 NORTHEAST WASHINGTON    0.99  -0.53  65.    11.39  -0.95  92. 
 OKANOGAN                0.77  -0.26  75.     9.63  -0.37  96. 
 EAST SLOPES WASH CASC.  1.36  -0.76  64.    30.97  -2.76  92. 
 CENTRAL WASHINGTON      0.31  -0.33  48.     4.87  -1.68  74. 
 UPPER SNAKE             1.05  -0.55  66.    16.03   3.09 124. 
 SNAKE RIVER PLAIN       0.60  -0.44  57.     6.20  -0.95  87. 
 OWYHEE/ MALHEUR         0.65  -0.32  68.     6.70  -0.82  89. 
 SALMON/ BOISE/ PAYETTE  1.26  -0.34  79.    15.56   1.19 108. 
 BURNT/ GRANDE RONDE     1.10  -0.26  81.    11.41   0.44 104. 
 CLEARWATER              2.17  -0.49  82.    22.11   0.85 104. 
 SOUTHEAST WASHINGTON    0.91  -0.76  54.    12.18  -1.97  86. 
 UPPER JOHN DAY          1.06  -0.19  85.    10.51   0.57 106. 
 UMATILLA/ LWR JOHN DAY  0.96  -0.54  64.    13.76   1.91 116. 
 UPR DESCHUTES/ CROOKED  0.42  -0.56  43.    10.42  -0.51  95. 
 HOOD/ LOWER DESCHUTES   2.04  -0.11  95.    26.80   3.13 113. 
 NW SLOPE WASH CASCADES  5.86  -0.36  94.    66.25  -5.43  92. 
 SW WA CASCADES/COWLITZ  4.54  -0.81  85.    55.35  -3.47  94. 
 WILLAMETTE VALLEY       4.75  -0.09  98.    53.25   3.14 106. 
 ROGUE/ UMPQUA           2.47  -0.31  89.    33.04   2.44 108. 
 KLAMATH BASIN           0.68  -0.56  55.    14.75  -0.14  99. 
 LAKE COUNTY-GOOSE LAKE  0.33  -0.84  28.     6.66  -2.15  76. 
 HARNEY/ MALHEUR BASIN   0.45  -0.61  43.     6.47  -1.26  84. 

 Columbia River Basin division values are computed by utilizing 
 un-weighted precipitation amounts from key stations in each area. 

 Precipitation normals are based on 1971-2000 historical data. 

 Please contact NWRFC for further information: (503) 326-7291. 
    

General Summary  ! Below average temperatures and Precipitation during April have caused decreases in expected Spring streamflow.  Cool  temperatures have delayed active Spring snowmelt in all areas.  The slow rate of snowmelt observed during April allowed more of the me lt runoff to be retained as soil moisture.  Near to slightly above average streamflow is predicted for most areas.  The exception is the main stem of the Snake river from Milner to Brownlee Dam where streamflow will be 60 to 80 percentof average. 

PRECIPITATION SUMMARY 

April "record" high/low temperatures and precipitation/snow amounts. 
"Please see the complete list of records at the National Weather 
Service field office's Climatology Web pages for more details." 


APR 12 2008 
 A RECORD LOW TEMPERATURE OF 20 DEGREES WAS SET AT ROME YESTERDAY.  
THIS BREAKS THE OLD RECORD OF 23 SET IN 1953. 
  
MON APR 14 2008 
 A RECORD HIGH TEMPERATURE OF 80 DEGREES WAS SET AT BOISE YESTERDAY.  
THIS TIES THE OLD RECORD OF 80 SET IN 1988.  
 A RECORD HIGH TEMPERATURE OF 80 DEGREES WAS SET AT BURNS OREGON  
YESTERDAY. THIS TIES THE OLD RECORD OF 80 SET IN 1947. 
  
MON APR 21 2008 
 A RECORD LOW TEMPERATURE OF 13 DEGREES WAS SET AT BURNS YESTERDAY.  
THIS BREAKS THE OLD RECORD OF 18 SET IN 2007. 
 A RECORD LOW TEMPERATURE OF 8 DEGREES WAS SET AT MCCALL    
YESTERDAY. THIS BREAKS THE OLD RECORD OF 12 SET IN 1982. 
  
TUE APR 22 2008 
 A RECORD LOW TEMPERATURE OF 18 DEGREES WAS SET AT JEROME YESTERDAY.  
THIS BREAKS THE OLD RECORD OF 21 SET IN 1970. 
  
TUE APR 22 2008 
 A RECORD LOW TEMPERATURE OF 14 DEGREES WAS SET AT MCCALL    
YESTERDAY. THIS BREAKS THE OLD RECORD OF 15 SET IN 1951. 
  
TUE APR 22 2008 
 A RECORD LOW TEMPERATURE OF 11 DEGREES WAS SET AT BURNS YESTERDAY.  
THIS BREAKS THE OLD RECORD OF 15 SET IN 1963. 

TUE APR 22 2008 
 A RECORD LOW TEMPERATURE OF 15 DEGREES WAS SET AT ROME YESTERDAY.  
THIS BREAKS THE OLD RECORD OF 23 SET IN 1968. 
  
SUN APR 27 2008 
 A RECORD LOW TEMPERATURE OF 10 DEGREES WAS SET AT MCCALL    
YESTERDAY. THIS BREAKS THE OLD RECORD OF 11 SET IN 1948. 
 A RECORD LOW TEMPERATURE OF 22 DEGREES WAS SET AT JEROME YESTERDAY.  
THIS BREAKS THE OLD RECORD OF 24 SET IN 1922. 
 A RECORD LOW TEMPERATURE OF 20 DEGREES WAS SET AT ROME YESTERDAY.  
THIS BREAKS THE OLD RECORD OF 24 SET IN 1985. 
  
MON APR 28 2008 
 A RECORD LOW TEMPERATURE OF 23 DEGREES WAS SET AT ROME YESTERDAY.  
THIS BREAKS THE OLD RECORD OF 26 SET IN 1966. 
  
SUN APR 20 2008 
 A RECORD SNOWFALL OF A TRACE WAS SET AT MEDFORD TODAY.  
THIS TIES THE OLD RECORD OF TRACE SET IN 1972. 
  
SUN APR 20 2008 
 A RECORD LOW TEMPERATURE OF 18 DEGREES WAS SET AT MONTAGUE TODAY.  
THIS BREAKS THE OLD RECORD OF 23 SET IN 1963. 

SUN APR 13 2008 
WESTERN MONTANA THIS AFTERNOON APRIL 13... 
 A RIDGE OF HIGH PRESSURE AND WARM SOUTHERLY WINDS ALLOWED 
TEMPERATURES TO TIE PREVIOUS RECORD HIGHS. BELOW IS A PRELIMINARY 
LIST OF THE RECORDS TIED. 
LOCATION	 TODAYS 	RECORD 
		  HIGH       HIGH (YEAR SET) 
MISSOULA	   79	       79 (1904) 
KALIELL	   74	       74 (1988) 
THOMPSON FALLS     80	       80 (1913) 

SUN APR 20 2008 
WESTERN MONTANA AND NORTH CENTRAL IDAHO ON APRIL 20 2008... 
	   NEW RECORD LOW    PREVIOUS RECORD (YEAR) 
ANACONDA	9		    11 (1927) 
DRUMMOND	9		    11 (1951) 
BUTTE		7		    10 (1927) 
  
TUE APR 22 2008 
  A RECORD LOW TEMPERATURE OF 7 DEGREES TIES THE PREVIOUS RECORD LOW 
OF 7 DEGREES SET IN 2001. 
  
SAT APR 19 2008 
 A RECORD LOW TEMPERATURE OF 29 DEGREES WAS SET AT WENATCHEE  
PANGBORN FIELD TODAY. THIS BREAKS THE OLD RECORD OF 32 SET IN 1966. 
RECORDS HAVE BEEN KEPT AT WENATCHEE AIRPORT SINCE 1959. 
  
SAT APR 19 2008 
 A RECORD SNOWFALL OF 0.4 INCH(ES) WAS SET AT OKANE AIRPORT  
YESTERDAY APR 18 2008. THIS BREAKS THE OLD RECORD OF TRACE SET IN  
2005. RECORDS HAVE BEEN KEPT AT OKANE AIRPORT SINCE 1881.  
  
FRI APR 11 2008 
NOTE: STATIONS MARKED WITH * INDICATE THAT THE STATION REPORTS ONCE 
PER DAY. FOR CONSISTENCY...THESE VALUES ARE CONSIDERED TO HAVE 
OCCURRED ON THE DAY THE OBSERVATION WAS TAKEN BUT MAY HAVE ACTUALLY 
OCCURRED (EECIALLY FOR MAX TEMPERATURE) ON THE PREVIOUS DAY. 
STATION 		 PREVIOUS	 NEW	    RECORDS 
			 RECORD/YEAR	 RECORD     BEGAN 
*GOLDENDALE, WA 	 25 / 1997	 25 (TIED)  1931 
  
MON APR 14 2008 
NOTE: STATIONS MARKED WITH * INDICATE THAT THE STATION REPORTS ONCE 
PER DAY. FOR CONSISTENCY...THESE VALUES ARE CONSIDERED TO HAVE 
OCCURRED ON THE DAY THE OBSERVATION WAS TAKEN BUT MAY HAVE ACTUALLY 
OCCURRED (EECIALLY FOR MAX TEMPERATURE) ON THE PREVIOUS DAY. 
STATION 		 PREVIOUS	 NEW	    RECORDS 
			 RECORD/YEAR	 RECORD     BEGAN 
*LONG CREEK, OR 	 78 / 1962	 79	    1957 
*MONUMENT 2, OR 	 85 / 1985	 88	    1961 
*PENDLETON(ES), OR	 83 / 1985	 83 (TIED)  1956 

TUE APR 15 2008 
NOTE: STATIONS MARKED WITH * INDICATE THAT THE STATION REPORTS ONCE 
PER DAY. FOR CONSISTENCY...THESE VALUES ARE CONSIDERED TO HAVE 
OCCURRED ON THE DAY THE OBSERVATION WAS TAKEN BUT MAY HAVE ACTUALLY 
OCCURRED (EECIALLY FOR MAX TEMPERATURE) ON THE PREVIOUS DAY. 
STATION 		 PREVIOUS	 NEW	    RECORDS 
			 RECORD/YEAR	 RECORD     BEGAN 
*PELTON DAM, OR 	 25 / 2001	 25 (TIED)  1958 
*BICKLETON, WA  	 22 / 2001	 21	    1931 
  
SAT APR 19 2008 
NOTE: STATIONS MARKED WITH * INDICATE THAT THE STATION REPORTS ONCE 
PER DAY. FOR CONSISTENCY...THESE VALUES ARE CONSIDERED TO HAVE 
OCCURRED ON THE DAY THE OBSERVATION WAS TAKEN BUT MAY HAVE ACTUALLY 
OCCURRED (EECIALLY FOR MAX TEMPERATURE) ON THE PREVIOUS DAY. 
STATION 		 PREVIOUS	 NEW	    RECORDS 
			 RECORD/YEAR	 RECORD     BEGAN 
*CONDON, OR		 20 / 1966	 20 (TIED)  1928 
*MITCHELL, OR		 20 / 1966	 20 (TIED)  1949 
REDMOND, OR		 13 / 1964	 13 (TIED)  1949 :SINCE MID 

SUN APR 20 2008 
NOTE: STATIONS MARKED WITH * INDICATE THAT THE STATION REPORTS ONCE 
PER DAY. FOR CONSISTENCY...THESE VALUES ARE CONSIDERED TO HAVE 
OCCURRED ON THE DAY THE OBSERVATION WAS TAKEN BUT MAY HAVE ACTUALLY 
OCCURRED (EECIALLY FOR MAX TEMPERATURE) ON THE PREVIOUS DAY. 
STATION 		 PREVIOUS	 NEW	    RECORDS 
			 RECORD/YEAR	 RECORD     BEGAN 
*CONDON, OR		 21 / 1952	 18	    1928 
*LONG CREEK, OR 	 20 / 1982	 20 (TIED)  1957 
MEACHAM, OR		 22 / 1975	 22 (TIED)  1948 :SINCE MID 

MON APR 21 2008 
NOTE: STATIONS MARKED WITH * INDICATE THAT THE STATION REPORTS ONCE 
PER DAY. FOR CONSISTENCY...THESE VALUES ARE CONSIDERED TO HAVE 
OCCURRED ON THE DAY THE OBSERVATION WAS TAKEN BUT MAY HAVE ACTUALLY 
OCCURRED (EECIALLY FOR MAX TEMPERATURE) ON THE PREVIOUS DAY. 
STATION 		 PREVIOUS	 NEW	    RECORDS 
			 RECORD/YEAR	 RECORD     BEGAN 
*JOSEPH, OR		 15 / 1951	 15 (TIED)  1893 
*LA GRANDE(CITY), OR	 25 / 1982	 19	    1948 
*MADRAS 2N, OR  	 24 / 1995	 24 (TIED)  1952 

TUE APR 22 2008 
NOTE: STATIONS MARKED WITH * INDICATE THAT THE STATION REPORTS ONCE 
PER DAY. FOR CONSISTENCY...THESE VALUES ARE CONSIDERED TO HAVE 
OCCURRED ON THE DAY THE OBSERVATION WAS TAKEN BUT MAY HAVE ACTUALLY 
OCCURRED (EECIALLY FOR MAX TEMPERATURE) ON THE PREVIOUS DAY. 
STATION 		 PREVIOUS	 NEW	    RECORDS 
			 RECORD/YEAR	 RECORD     BEGAN 
*MITCHELL, OR		 23 / 1968	 19	    1949 
  
SAT APR 26 2008 
NOTE: STATIONS MARKED WITH * INDICATE THAT THE STATION REPORTS ONCE 
PER DAY. FOR CONSISTENCY...THESE VALUES ARE CONSIDERED TO HAVE 
OCCURRED ON THE DAY THE OBSERVATION WAS TAKEN BUT MAY HAVE ACTUALLY 
OCCURRED (EECIALLY FOR MAX TEMPERATURE) ON THE PREVIOUS DAY. 
STATION 		 PREVIOUS	 NEW	    RECORDS 
			 RECORD/YEAR	 RECORD     BEGAN 
*HERMISTON 2NW, OR	 29 / 1969	 28	    1928 
MEACHAM, OR		 19 / 1970	 17	    1948 :SINCE MID 
PENDLETON(ARPT), OR	 30 / 1970	 28	    1934 :SINCE MID 

MON APR 28 2008 
NOTE: STATIONS MARKED WITH * INDICATE THAT THE STATION REPORTS ONCE 
PER DAY. FOR CONSISTENCY...THESE VALUES ARE CONSIDERED TO HAVE 
OCCURRED ON THE DAY THE OBSERVATION WAS TAKEN BUT MAY HAVE ACTUALLY 
OCCURRED (EECIALLY FOR MAX TEMPERATURE) ON THE PREVIOUS DAY. 
STATION 		 PREVIOUS	 NEW	    RECORDS 
			 RECORD/YEAR	 RECORD     BEGAN 
*MONUMENT 2, OR 	 25 / 1984	 24	    1961 
  
TUE APR 08 2008 
 A RECORD LOW TEMPERATURE OF 0 DEGREES WAS SET AT STANLEY TODAY.  
THIS BREAKS THE OLD RECORD OF 2 SET IN 1973. 
1240 PM MDT WED APR 16 2008 
TODAYS LOW TEMPERATURE OF 18 AT CHALLIS TIED THE RECORD SET IN 1982. 
  
MON APR 21 2008 
 TODAYS LOW TEMPERATURE OF 12 AT CHALLIS BREAKS OLD RECORD OF  
20 SET IN 1985. 
 TODAYS LOW TEMPERATURE OF 15 AT POCATELLO BREAKS OLD RECORD OF 18  
SET IN 1982. 
  
WED APR 23 2008 
 A RECORD LOW TEMPERATURE OF 21 DEGREES WAS SET AT POCATELLO  
YESTERDAY. THIS BREAKS THE OLD RECORD OF 23 SET IN 1982. 
 A RECORD LOW TEMPERATURE OF 19 DEGREES WAS SET AT BURLEY YESTERDAY.  
THIS TIES THE OLD RECORD OF 19 SET IN 1968. 
  
SAT APR 26 2008 
 A RECORD LOW TEMPERATURE OF 16 DEGREES WAS SET AT POCATELLO  
TODAY. THIS BREAKS THE OLD RECORD OF 23 SET IN 1945. 
  
SAT APR 26 2008 
 A RECORD LOW TEMPERATURE OF 21 DEGREES WAS SET AT IDAHO FALLS  
TODAY. THIS BREAKS THE OLD RECORD OF 22 SET IN 1972. 
  
SAT APR 26 2008 
 A RECORD LOW TEMPERATURE OF 22 DEGREES WAS SET AT BURLEY TODAY.  
THIS BREAKS THE OLD RECORD OF 24 SET IN 1983. 
  
SAT APR 26 2008 
 A RECORD LOW TEMPERATURE OF 18 DEGREES WAS SET AT CHALLIS TODAY.  
THIS BREAKS THE OLD RECORD OF 19 SET IN 1948. 
  
SAT APR 26 2008 
 A RECORD LOW TEMPERATURE OF 6 DEGREES WAS SET AT STANLEY TODAY.  
THIS BREAKS THE OLD RECORD OF 13 SET IN 1985. 
  
SUN APR 27 2008 
 A RECORD LOW TEMPERATURE OF 16 DEGREES WAS SET AT POCATELLO  
YESTERDAY. THIS BREAKS THE OLD RECORD OF 23 SET IN 1945. 
 A RECORD LOW TEMPERATURE OF 22 DEGREES WAS SET AT BURLEY  
YESTERDAY. THIS BREAKS THE OLD RECORD OF 24 SET IN 1983. 
 A RECORD LOW TEMPERATURE OF 18 DEGREES WAS SET AT CHALLIS  
YESTERDAY. THIS BREAKS THE OLD RECORD OF 19 SET IN 1948. 
  
SUN APR 27 2008 
 A RECORD LOW TEMPERATURE OF 22 DEGREES WAS SET AT CHALLIS TODAY.  
THIS TIES THE OLD RECORD OF 22 SET IN 1955. 
  
SUN APR 27 2008 
 A RECORD LOW TEMPERATURE OF 11 DEGREES WAS SET AT STANLEY TODAY.  
THIS TIES THE OLD RECORD OF 11 SET IN 1983. 
  
SUN APR 27 2008 
 A RECORD LOW TEMPERATURE OF 22 DEGREES WAS SET AT THE POCATELLO  
AIRPORT THIS MORNING AND BREAKS THE OLD RECORD OF 24 SET IN 1972. 
BURLEY AIRPORT ALSO RECORDED A RECORD LOW TEMPERATURE OF 24 DEGREES  
THIS MORNING AND BREAKS THE OLD RECORD OF 26 SET IN 1972. 
AIRPORTS... 
THIS MORNING...CHALLIS AIRPORT RECORDED A LOW OF 22 DEGREES...TYING  
THE PREVIOUS RECORD SET IN 1955. 
  
SAT APR 12 2008 
CLEAR SKIES AND OFFSHORE FLOW SET THE STAGE FOR A FEW RECORD HIGH  
TEMPERATURES TO BE ECLIPSED THIS AFTERNOON. THE FOLLOWING TABLE  
SUMMARIZES THESE. 
THESE ARE THE NEW RECORD HIGHS FOR APRIL 12. 
LOCATION	  HIGH ON SAT AFTN	PREVIOUS RECORD     
ASTORIA................   77 (TIED)	   77 IN 1940 
EUGENE.................   84		   82 IN 1951 
  
WED APR 09 2008 
 A RECORD LOW TEMPERATURE OF 35 DEGREES WAS TIED AT SEATTLE WFO ON  
APR 8TH. THE OLD RECORD OF 35 SET WAS LAST SET IN 1992. 
  
THU APR 12 2008 
...RECORD HIGH TEMPERATURES TIED OR BROKEN ON SATURDAY APRIL 12TH... 
	    APRIL 12TH     OLD RECORD 
SEA TAC 	    79        77 1951 
OLYMPIA 	    82        82 1951 
HOQUIAM 	    78        78 1980 
WFO SEATTLE	    79        68 1991 
  
MON APR 14 2008 
 A RECORD RAINFALL OF 0.33 INCH(ES) WAS SET AT SEATTLE WFO TODAY.  
THIS BREAKS THE OLD RECORD OF 0.22 SET IN 1997. 
  
FRI APR 18 2008 
 A RECORD LOW TEMPERATURE OF 36 DEGREES WAS SET AT SEATTLE WFO TODAY.  
THIS BREAKS THE OLD RECORD OF 37 SET IN 2006. 
 A RECORD RAINFALL OF 0.22 INCHES WAS SET AT SEATTLE WFO TODAY. THIS  
BREAKS THE OLD RECORD OF 0.20 SET IN 2007. 
  
SAT APR 19 2008 
 A RECORD LOW TEMPERATURE OF 36 DEGREES WAS SET AT SEATTLE WFO TODAY.  
THIS BREAKS THE OLD RECORD OF 37 SET IN 1987. 
 A RECORD SNOWFALL OF A TRACE WAS SET AT SEATTLE TACOMA AIRPORT  
TODAY. THIS TIES THE OLD RECORD OF A TRACE SET IN 1985. 
 A RECORD SNOWFALL OF A TRACE WAS SET AT OLYMPIA AIRPORT TODAY. THIS  
TIES THE OLD RECORD OF A TRACE SET IN 1985. 
  
SUN APR 20 2008 
RECORD LOW MAXIMUM TEMPERATURES SET ON APRIL 20TH 2008 
LOCATION	  NEW RECORD		  OLD RECORD 
SEA TAC 		  48		  49 1967,1970   
WFO SEATTLE		  47		  56 2002   
OLYMPIA 		  44		  50 1972  
BELLINGHAM		  47		  49 1972	      
 A RECORD SNOWFALL OF TRACE INCH(ES) WAS SET AT OLYMPIA AIRPORT  
TODAY. THIS TIES THE OLD RECORD OF TRACE SET IN 1960. 
  
TUE APR 22 2008 
LOCATION	  NEW RECORD		  OLD RECORD 
HOQUIAM 		  47		  47 IN 1960, 1972   
OLYMPIA 		  50		  50 IN 1961   
 A RECORD LOW TEMPERATURE OF 36 DEGREES WAS SET AT SEATTLE WFO ON  
APRIL 21ST. THIS BREAKS THE OLD RECORD OF 38 SET IN 2001. 
  
TUE APR 22 2008 
 A RECORD LOW TEMPERATURE OF 29 DEGREES WAS SET AT BELLINGHAM  
AIRPORT. THIS TIES THE OLD RECORD OF 31 SET IN 1960 AND 1968. 
 A RECORD LOW TEMPERATURE OF 37 DEGREES WAS SET AT SEATTLE WFO  
TODAY. THIS TIES THE OLD RECORD OF 37 SET IN 2006. 
  
SAT APR 26 2008 
 A RECORD LOW TEMPERATURE OF 27 DEGREES WAS SET AT OLYMPIA AIRPORT TODAY.  
THIS TIES THE OLD RECORD OF 27 SET IN 1984. 
 A RECORD LOW TEMPERATURE OF 37 DEGREES WAS SET AT SEATTLE WFO TODAY. THIS BREAKS THE OLD RECORD OF 38 SET IN 1988. 
  
Snow Summary  !  Because of the cool April conditions this Spring, snowmelt has been delayed. Only  the low elevation snowpacks have be 
en depleted. Retention of the snowpack has produced above average snow water equivalents on May 1st.  The best May 1st smow conditions  
are on the Bitterroot river in Montana, The lower Clark Fork river, the northern Idaho area, the Yakima River in Washington and on Blue mountain streams in Northeast Oregon at 140 to 160 percent.  Other eastside areas have average to slighty above average May 1st snow water equivalents. 
  
Streamflow Summary  ! The lack of an April snowmelt contribution has kept streamflows for April well below average at 40 to 60 percent  
of average for most basins.  Only the Weiser river in central Idaho, the Owyhee river in southeast Oregon and the Blue Mountain tributa 
ries in northeast Oregon had average streamflows due to low elevation melt.  April streamflow on the Columbia river at The Dalles was at 50 
percent.  
  
The forecast streamflows for the April through September and April through July periods has dropped 2 to 5 percent from April 1st forec 
asts.  Near to slightly above average streamflows are expected in all areas.  The best Spring streamflow at 120 percent of average are  
forecast on the Spokane and Yakima rivers.  Streamflow this Spring west of the Cascades will be above average at 100 to 120 percent.  
http://www.nwrfc.noaa.gov/water_supply/ws_fcst.cgi has detailed water supply forecasts. 
  

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US Dept of Commerce National Oceanic and Atmospheric Administration National Weather Service Northwest River Forecast Center (NWRFC) 5241 NE 122nd Avenue Portland, Oregon 97230-1089 Telephone: 503-326-7401 Last Modified: May 17, 2007

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