August 17, 2017
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Summary: Temperatures are running anywhere from 4 to 8 degrees warmer than 24 hours ago. The marine layer has shrunk down to 1,900 feet. This time yesterday it was approximately 3,000 feet. The air aloft has also warmed with a freezing level of 16,000 feet. All of this is due to a high pressure ridge over the eastern Pacific which is now edging inland. This will create the pattern allowing for a return to summer-like conditions with temperatures rising to marginally above average over the weekend. A dry west to northwest flow will continue, ensuring no moisture moves in from the south.
By Sunday, a very weak trough of low pressure will be off the California coast. The only real impact on the valley will be marginally cooler temperatures as it’s possible shallow bursts of marine air may move down the valley from time to time. Even so, temperatures will be only marginally below average, levelling off in to the mid to upper 90s.
In the medium range picture, stronger high pressure is expected after next week which could lead to a hot spell, but it’s too far off to have much confidence as of yet in that possible scenario.
Forecast: Clear skies through Sunday. Mostly clear skies will continue Sunday night through Thursday.
Short Term:
| Madera 97/66/99/67/100 | Reedley 97/65/98/68/100 | Dinuba 96/65/98/67/99 | |
| Porterville 98/66/100/67/101 | Lindsay 98/66/100/68/101 | Delano 97/67/100/68/101 | |
| Bakersfield 97/75/101/77/101 | Arvin 99/71/101/73/102 | Taft 97/76/99/77/101 | |
| Lamont 99/71/101/75/102 | Pixley 97/66/100/67/100 | Tulare 97/65/99/67/100 | |
| Woodlake 98/67/100/68/100 | Hanford 98/68/100/68/101 | Orosi 97/66/100/68/101 | |
Seven Day Forecast:
| Sunday
Mostly clear 67/98 |
Monday
Mostly clear 66/97 |
Tuesday
Mostly clear 65/95 |
Wednesday
Mostly clear 64/96 |
Thursday
Mostly clear 64/98 |
Two Week Outlook: August 23 through August 29: 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.
August: This model shows a significant trough of low pressure east of the Rockies and overall fairly strong high pressure dominating the western third of the U.S. This should create above average temperatures for the month with a chance of the return of the monsoon from time to time. Generally, temperatures will be above average with a slight chance of isolated showers and thunderstorms.
August, September, October: The trend towards above average temperatures shows up once again through at least August and September. October is more iffy. As far as precipitation is concerned, conditions will remain near average. Remember, the real rainfall season doesn’t begin until November so no significant amounts of precipitation are seen at this time.
Winds: Winds will be generally less than 15 MPH through Sunday 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 15, 2017: Delano, 77%/26%, Porterville, 80%39%
Percentage of Sunshine Today/Tomorrow: Visalia: Today 100% tomorrow 100%, Bakersfield: Today 100% tomorrow 100%.
ET Rates Over the Past Seven Days August 15, 2017: Stratford 1.97, Parlier 1.58, Blackwell 2.08, Lindcove 1.73, Arvin 2.12, Orange Cove 1.99, Porterville 1.65, Delano 1.78, Madera Two 1.64. Courtesy University of California *=estimate, NA=not available.
Seven Day Soil Temperatures: Stratford 75, Parlier 83, Blackwell 80, Lindcove 78, Arvin NA, Orange Cove 83, Porterville 84, Delano 83, Madera Two 83
Mean Temperatures for August Month So Far: 82.9. +2.9
Record Temperatures: 110/53 Average Temperatures: 97/64
Cooling Degree Days This Season: 1509, +377 Courtesy of the NWS
Precipitation: Seasonal total/average/above or below average:
Since August 15, 2017, Fresno: 17.20 season / +5.88 or +5.88, Month to Date: T
Since August 15, 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: 6:18 am Sunset: 7:47 Hours of Daylight: 13:31
Yesterday’s Weather
MAE : Madera 253 : DH1700 / 89 / 59 / 0.00 /
FAT : Fresno Airport 333 : DH1700 / 90 / 63 / 0.00 /
HJO : Hanford Airport 242 : DH1700 / 91 / 62 / 0.00 /
NLC : Lemoore Naval AS 234 : DH1700 / 92 / 59 / 0.00 /
BFL : Bakersfield Airport 496 : DH1700 / 91 / 66 / 0.00 /
VIS : Visalia Airport 292 : DH1700 / 89 / 62 / 0.00 /
ATEC1 : Avenal 787 : DH1654 / 91 / 62 / 0.00 /
PTV : Porterville Airport 442 : DH1700 / 90 / 61 / 0.00 /
TFTC1 : Taft 759 : DH1652 / 89 / 67 / 0.00 /
LOSC1 : Los Banos 120 : DH1600 / 89 / 58 / 0.00 /
Rainfall:
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 6.36 6.47
BISHOP 0.00 9.18 187 3.88 79 4.91 5.18
SALINAS T 16.45 130 13.47 106 12.65 12.83
PASO ROBLES 0.00 16.14 129 8.06 65 12.48 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: Friday, August 18