CRC Sacramento Valley Forecast      phone: 530-342-1700
  www.westernwx.com/CRC ←Webpage email: forecaster@westernwx.com 
        Wednesday August 31, 2011 issued 5:45am   by Forecaster Marc Walsh
Text Box: HIGHLIGHTS: Sunny with reasonable temps today, similar to yesterday. Warmer tomorrow with some north wind. Seasonably warm to locally hot Friday & over the holiday weekend. Slight cooling on Labor Day, then warmer again.
Text Box: Short Term Weather Discussion: A dry upper level trough of low pressure will drag slowly across NorCal today keeping valley temperatures similar to yesterday as the marine layer remains deep this morning and onshore flow is still moderate (with a Delta Breeze running steady at 20 mph at Travis AFB). However, both (the marine layer depth & onshore flow) are likely to trend weaker during the course of the day. Today (&/or yesterday) may be the coolest days we see in quite some time as long wave ridging is forecast to set up over the West through the extended period (out to 10 days). The current trough is forecast to move ENE into the northern Rockies by tomorrow followed a surface high building over the Great Basin, setting up the possibility of a brief period of offshore flow (i.e. north winds). Around the first week in September is typically the time we start seeing some north wind episodes in the valley. Don't think we're going to get strong north winds tomorrow, but can foresee a brief period tomorrow morning where north winds get up to 20 mph along the west side of the valley. Anyway, the northerly/offshore flow we do get will shut off the Delta Breeze & we will warm up tomorrow. We shouldn't quite reach 100°F though as the air mass aloft isn't quite warm enough, yet.
FORECAST SPECIFICS
Weather Temps Dew Pts POPs Amounts Winds
TODAY (n) Sunny 90-95 45-55 0% none Var-N 3-12
(s) 88-92 50-60 SE-SW 3-15
TONIGHT (n/w) Clear 56-64 43-48 0% none NW-N 3-12 G15
(s/e) 52-59 48-54 SW-S 5-15→Var 0-10
THURSDAY (n/w) Sunny 94-98 30-40 0% none NW-N 5-15 G20
(s/e) 40-50 Var 3-10→NW 3-12
SACRAMENTO VALLEY CLIMATE SUMMARY                    
30 August 2011 Rainfall ETo Today's  
      Max/Min 24hr Sea(7/1) % normal Daily Past week normals Today's Records & Year  
Red Bluff 95/62 0.00 0.00 0% 0.22 1.60 93/61 109 (1998), 51 (1946)
Artois n/a n/a 0.00 -- 0.22 1.60 -- ---
Chico State Farm 92/59 0.00 0.00 0% 0.19 1.37 92/57 109 (1998), 47 (1921)
Dunnigan Hills n/a n/a 0.00 -- 0.22 1.61 -- ---
Marysville 92/55 0.00 0.00 0% 0.20 1.46 93/61 104 (1998), 50 (1957)
Sacramento 87/57 0.00 0.00 0% 0.17 1.53 90/57 104 (1998), 50 (1957)
Avg Max: 92°F Range: (87 - 95)  Warmest: Red Bluff    Avg Min: 57°F Range: (50 - 62)  Coldest: Dunnigan Hills-South  
Sacramento Valley AMOS Network
Daily Meteorological Summary
Tuesday, August 30, 2011
Temperature Avg Avg WIND Precipitation   Solar
Max Min Ave DewPt RH Avg Gust Gust 24hr 7/1 to date Rad  ETo
        ºF ºF ºF ºF %   mph mph Dir   in.  in.   cal/cm2 in.
     East Valley                                
Chico WWG     92.6 60.1 75.9 56.5 53 1.7 10.3 S 0.00 0.00 ----- -----
Chico State Farm 92.2 58.9 74.7 57.1 57 2.4 9.4 S 0.00 0.00 501 0.17
Chico WTP 90.1 59.6 74.5 57.1 58 1.9 10.5 SSE 0.00 0.00 ----- -----
Durham 88.0 57.1 72.4 ----- 64 2.5 10.5 SSE 0.00 0.00 ----- -----
Butte College 93.1 58.6 76.4 53.6 48 2.2 9.9 WSW 0.00 0.00 580 0.20
Oroville 93.7 61.5 77.7 52.4 44 1.9 11.4 SE ----- ----- ----- -----
Biggs 90.5 58.8 72.9 56.6 60 4.2 11.4 SSE 0.00 0.00 ----- -----
Gridley 91.0 54.3 71.5 54.3 60 2.5 10.5 SSE 0.00 0.00 556 0.18
North Yuba 91.7 56.3 71.7 57.7 65 3.2 10.1 S 0.00 0.12 ----- -----
Wheatland 91.1 54.8 72.5 55.3 58 4.0 12.9 S ----- ----- ----- -----
Lincoln-North 91.6 54.3 73.7 ----- 52 4.3 12.3 S 0.00 ----- ----- -----
Lincoln 93.0 57.6 74.5 52.5 50 5.7 15.6 S ----- ----- ----- -----
Natomas 89.6 57.8 71.3 54.2 58 7.5 18.0 S 0.00 0.00 ----- -----
Sacramento SE   89.9 56.6 70.5 51.3 55 2.7 10.3 S 0.00 0.00
     West Valley                                
Corning     91.7 50.9 71.7 57.4 67 2.4 14.5 S 0.00 0.00 ----- -----
Orland Buttes 91.1 56.6 72.7 58.3 66 1.4 13.0 SE 0.00 0.00 556 0.19
Orland East 89.9 58.2 73.3 60.5 68 3.2 12.7 S ----- ----- ----- -----
Artois not available
Artois South 90.6 57.9 73.0 59.1 65 3.3 23.0 ESE ----- ----- 633 0.21
Willows 90.9 55.5 73.1 ----- ----- 4.3 15.6 SSE 0.00 0.00 ----- -----
Willows-West 89.2 54.4 70.6 58.0 69 1.9 12.1 SSE 0.17 1.10 497 0.16
Willows-Foothill 92.5 56.4 73.7 ---- ---- 2.0 15.5 ESE 0.00 0.00 ----- -----
Maxwell SW not available
Arbuckle-NE 91.1 52.8 71.1 54.1 60 3.6 11.3 SE 0.00 0.00 595 0.21
Arbuckle not available
Arbuckle-South 90.5 54.3 72.0 53.1 57 2.3 12.1 E 0.00 0.00 595 0.19
Kirkville 89.9 53.6 69.1 56.4 67 4.1 15.6 SE ----- ----- ----- -----
Knights Landing 90.2 51.1 67.8 52.7 63 4.8 12.3 SE 0.00 0.00 354 0.14
Dunnigan Hills not available
Dunnigan Hills-South 90.6 50.4 68.7 54.0 66 2.7 12.5 ENE 0.00 0.00 585 0.19
Esparto-North 93.5 53.5 71.5 53.3 60 1.0 7.9 ENE 0.00 ----- 538 0.17
Esparto 90.1 52.1 69.4 53.3 63 4.0 16.9 E ----- ----- ----- -----
Woodland 91.0 51.3 69.2 52.5 61 3.4 12.5 SE 0.00 0.00 449 0.17
Madison not available
Dixon-West     87.1 51.7 67.3 53.7 66 3.1 13.8 ESE 0.00 0.00 597 0.20
     Delta                                  
Yolo Bypass not available
Clarksburg 88.0 55.8 68.6 53.4 62 4.4 11.3 W 0.00 0.00 566 0.18
Elk Grove-West 86.2 55.7 67.8 54.9 66 4.4 11.6 WSW 0.00 0.00 629 0.19
     Butte & foothills                              
Sutter Buttes   81.0 68.5 74.2 ----- ----- 12.1 26.7 SE 0.00 0.00 ----- -----