August 18, 2017
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Summary: Temperatures as of 6:00am were running 3 to 5 degrees warmer than 24 hours ago. The marine layer along the coast has shrunk back to around 1,500 feet and I noted winds through Pacheco Pass are only out of the west at 10 MPH, indicating no sea breeze is moving through the Coast Range. Winds at Fairfield are also weak.
There is a note of interest, however, on forecast models this morning. They show a large upper high blanketing the western U.S., however embedded within this high is a zone of weakness which yesterday set off thunderstorms over the Sierra Nevada. It has also turned the winds aloft easterly. This is moving some cloud cover over the valley floor. No precipitation is expected with the exception of the Sierra Nevada where thunderstorms will again be present.
The low is forecast to move into southern California by Sunday, allowing a westerly flow to break through by early next week. And speaking of early next week, a new trough of low pressure will develop along the west coast, lowering temperatures to near average and, with a little luck, maybe even a few degrees below average. Through the weekend, though, readings will be near the century mark in many areas.
Forecast: Clear skies through Monday with occasional cloudiness through Saturday. Mostly clear skies will continue Monday night through Friday.
Short Term:
| Madera 99/68/100/68/99 | Reedley 100/67/100/67/98 | Dinuba 99/66/101/67/98 | |
| Porterville 100/68/101/68/99 | Lindsay 100/66/101/67/99 | Delano 101/68/101/68/100 | |
| Bakersfield 100/76/101/76/100 | Arvin 101/71/102/73/100 | Taft 99/77/100/77/98 | |
| Lamont 102/72/102/73/99 | Pixley 100/66/100/66/98 | Tulare 98/66/99/67/98 | |
| Woodlake 100/67/100/67/98 | Hanford 101/67/101/66/99 | Orosi 100/67/101/67/98 | |
Seven Day Forecast:
| Monday
Mostly clear 68/96 |
Tuesday
Mostly clear 66/96 |
Wednesday
Mostly clear 63/95 |
Thursday
Mostly clear 66/98 |
Friday
Mostly clear 65/97 |
Two Week Outlook: August 25 through August 31: This model indicates a trough of low pressure will be off shore during the early part of the period. It will then form another low over Nevada. This poses little if any chance of precipitation, but it would maintain a westerly flow with a possibly deep marine layer which would allow temperatures to slide a bit below average.
September: This model shows upper level high pressure more dominant over the western U.S. There’s no clear indicator of above or below average rainfall as we move into the fall season. With that in mind, we’ll call for near average precipitation for the month.
September, October, November: It appears temperatures overall will rise to above average values for the bulk of this time frame. Upper level high pressure is also more dominant with precipitation, believe it or not, predicted to be somewhat near average.
Winds: Winds will be generally less than 15 MPH through Monday and mainly out of the northwest afternoons and evenings.
Rain: Expect dry weather for the foreseeable future.
Afternoon Dew Points Today: Low to mid 50s. Kern: Low to mid 50s
Relative Humidity Forecast: Hanford, 25%/80% Bakersfield, 20%/60%
Actual Humidity August 16, 2017: Delano, 84%/32%, Porterville, 85%30%
Percentage of Sunshine Today/Tomorrow: Visalia: Today 100% tomorrow 100%, Bakersfield: Today 100% tomorrow 100%.
ET Rates Over the Past Seven Days August 16, 2017: Stratford 1.92, Parlier 1.54, Blackwell 2.04, Lindcove 1.69, Arvin 2.07, Orange Cove 1.94, Porterville 1.63, Delano 1.75, Madera Two 1.60. Courtesy University of California *=estimate, NA=not available.
Seven Day Soil Temperatures: Stratford 75, Parlier 83, Blackwell 80, Lindcove 78, Arvin NA, Orange Cove 82, Porterville 84, Delano 81, Madera Two 83
Mean Temperatures for August Month So Far: 82.5. +3.6
Record Temperatures: 111/53. Average Temperatures: 97/64
Cooling Degree Days This Season: 1519, +376 Courtesy of the NWS
Precipitation: Seasonal total/average/above or below average:
Since August 16, 2017, Fresno: 17.20 season / +5.88 or +5.88, Month to Date: T
Since August 16, 2017, Bakersfield: 7.88, or 1.46, Month to Date: T, Water year season is from October 1st through September.
Chilling Hours November 1st Through February 28: Orange Cove, Parlier, Arvin, Shafter, , Stratford, Madera two, Alpaugh, Delano, Lindcove, Porterville, Hours at 45 or below 45.
Sunrise: 6:19 am Sunset: 7:46 Hours of Daylight: 13:29
Yesterday’s Weather
MCE : Merced 153 : DH1700 / 94 / 64 / 0.00 /
MAE : Madera 253 : DH1700 / 96 / 65 / 0.00 /
FAT : Fresno Airport 333 : DH1700 / 95 / 68 / 0.00 /
HJO : Hanford Airport 242 : DH1700 / 97 / 66 / 0.00 /
NLC : Lemoore Naval AS 234 : DH1700 / 97 / 64 / 0.00 /
BFL : Bakersfield Airport 496 : DH1700 / 95 / 73 / 0.00 /
VIS : Visalia Airport 292 : DH1700 / 95 / 65 / 0.00 /
ATEC1 : Avenal 787 : DH1652 / 95 / 67 / 0.00 /
PTV : Porterville Airport 442 : DH1700 / 95 / 65 / 0.00 /
TFTC1 : Taft 759 : DH1650 / 95 / 73 / 0.00 /
LOSC1 : Los Banos 120 : DH1600 / 94 / 61 / 0.00 /
Rainfall:
To date Last year Average Annual ave
STOCKTON 0.00 21.78 158 16.69 121 13.76 14.06
MODESTO 0.00 16.93 132 15.61 122 12.84 13.11
MERCED 0.00 16.03 131 14.66 120 12.20 12.50
MADERA 0.00 14.18 121 12.96 110 11.75 12.02
FRESNO 0.00 17.20 152 14.29 126 11.32 11.50
HANFORD 0.00 11.05 112 8.26 83 9.91 10.10
BAKERSFIELD 0.00 7.82 123 5.43 85 6.37 6.47
BISHOP T 9.18 187 3.88 79 4.92 5.18
SALINAS 0.00 16.45 130 13.47 106 12.65 12.83
PASO ROBLES 0.00 16.14 129 8.06 65 12.49 12.78
SANTA MARIA 0.00 18.44 134 9.00 65 13.80 13.95
Rainfall season from October 1st through September 30th
Next Report: Saturday, August 19