June 29, 2018
Summary: The valley is pooled with a shallow layer of marine air this morning. This has resulted in pleasant overnight lows with many locations dropping below the 60 degree mark. The marine air will mix out today, but will still keep temperatures in the mid 90s. the marine layer itself is 2,000 feet deep, but barometers off shore and over the interior west are roughly the same so there is no mechanism to tug the sea breeze inland any further.
Strong upper level high pressure is located several hundred miles off the northern California coast and will push inland over the weekend, resulting in another round of triple digits. Highest temperatures, especially Sunday, at the hottest locations will top out at 104 to 107 then will begin to back off a bit Monday as a new low center begins to take shape over the Pacific Northwest. By Tuesday and Wednesday, it will have formed a trough which will move through central California, repeating the process of tugging in a deep marine layer and moderate temperatures. It’s possible low to mid 90s will greet us for the Fourth of July.
After Wednesday, a typical summertime pattern will begin with a strong high developing over the Four Corners region, expanding westward into California. This is a hot pattern so we could begin to see some of the hottest temperatures of the year so far about a week from Saturday. Also, this pattern, if it sets up correctly, will generate a southeast flow aloft which could begin to move monsoon moisture up the Sierra Nevada for possible afternoon and evening thunderstorms. This potential pattern is still more than a week away, so we’ll tweak it as we move along.
Forecast: Mostly clear through Monday. Mostly clear Monday night through Friday.
Short Term:
| Madera 95/62/102/65/103 | Reedley 95/63/102/66/104 | Dinuba 94/63/101/64/102 | |
| Porterville 95/64/103/66/104 | Lindsay 94/63/101/64/104 | Delano 95/67/103/69/105 | |
| Bakersfield 94/70/102/72/104 | Arvin 94/67/102/70/106 | Taft 94/72/102/75/104 | |
| Lamont 95/66/102/70/105 | Pixley 94/64/101/66/104 | Tulare 94/63/101/65/103 | |
| Woodlake 95/63/101/66/103 | Hanford 95/65/103/67/105 | Orosi 94/63/101/65/103 | |
Seven Day Forecast:
| Monday
Mostly clear 67/101 |
Tuesday
Mostly clear 65/97 |
Wednesday
Mostly clear 61/94 |
Thursday
Mostly clear 59/96 |
Friday
Mostly clear 66/100 |
Two Week Outlook: July 6 through July 12: For the past couple of model runs, there has been an indication of a strong high over the Four Corners region setting up a southeastern flow over southern and central California. This would favor monsoon moisture moving into central California, however precipitation is typically confined to the mountain areas. However, on rare occasions measurable rain occurs on the valley floor. For now, I’m not calling for this, but just explaining a pattern change which will also result in above average temperatures.
June: As we head into the summer months, it appears this June will be mostly dry, as is typical. Models are projecting higher than average pressure patterns during the month so look for temperatures, generally speaking, to be above average.
June, July, August: All summers are hot in the San Joaquin Valley, and typically very dry. This summer will be no exception. If there’s any tendency on modeling at all it would be that upper level high pressure would be marginally stronger than average with temperatures also running marginally above average. The monsoon season will begin in several weeks so it’s impossible to tell it will be an active one this year. We’ll just have to wait and see.
Winds: Winds will be generally at or less than 15 MPH through Monday and generally out of the northwest afternoons and evenings.
Rain: Expect dry conditions indefinitely
Afternoon Dew Points Today: Mid to upper 40s. Kern: Mid to upper 40s.
Humidity: Visalia: 20%/60% Bakersfield: 20%/45%
Actual Humidity June 27, 2018: Delano, 71%/18%, Porterville, 78%/13%
Percentage of Sunshine Today/Tomorrow: Visalia: Today: 100% tomorrow 100% Bakersfield: Today: 100% Tomorrow: 100%
ET Rates Over the Past Seven Days: Stratford 2.26, Parlier 2.07, Blackwell 2.43, Lindcove 2.04, Arvin 2.29, Orange Cove 2.27, Porterville 1.98, Delano 2.04, Madera Two NA. Courtesy University of California *=estimate, NA=not available.
Seven Day Soil Temperatures: Stratford 73, Parlier 78, Blackwell 85, Lindcove, 76, Arvin, 83, Orange Cove 76, Porterville 83, Delano 77, Madera Two, NA
Record Temperatures: 108/51. Average Temperatures: 95/63
Cooling Degree Days this Season: 574 +132 Courtesy of the NWS
Average temperatures for June so far, 76.8 +2.5
Precipitation: Seasonal total/average/above or below average:
Since July 1, 2017 Fresno: 6.73 season. or -4.58. Month to Date: .00
Since July 1, 2017, Bakersfield: 3.93, or -2.40. Month to Date: .00
Water year season is from October 1st through September.
Chilling Hours November 1st through February 28: Orange Cove, Parlier, Arvin, Shafter, Stratford, Madera two, Lindcove, Porterville, Hours at 45 or below 45.
Sunrise: 5:43 am Sunset: 8:22 pm. Hours of Daylight: 14:39
Yesterday’s Weather:
MAE : Madera 253 : DH1700 / 92 / 57 / 0.00 /
FAT : Fresno Airport 333 : DH1700 / 93 / 63 / 0.00 /
HJO : Hanford Airport 242 : DH1700 / 93 / 59 / 0.00 /
NLC : Lemoore Naval AS 234 : DH1700 / 94 / 57 / 0.00 /
BFL : Bakersfield Airport 496 : DH1700 / 94 / 68 / 0.00 /
VIS : Visalia Airport 292 : DH1700 / 92 / 60 / 0.00 /
ATEC1 : Avenal 787 : DH1655 / 91 / 59 / 0.00 /
PTV : Porterville Airport 442 : DH1700 / 93 / 59 / 0.00 /
TFTC1 : Taft 759 : DH1653 / 94 / 69 / 0.00 /
LOSC1 : Los Banos 120 : DH1600 / 88 / 57 / 0.00 /
Rainfall: Water year Oct 1st through September 30th
Year % Last Y. % Ave. Annual ave.
STOCKTON 0.00 9.22 67 21.78 158 13.76 14.06
MODESTO 0.00 8.17 64 16.93 132 12.82 13.11
MERCED 0.00 7.06 58 16.03 132 12.19 12.50
MADERA 0.00 7.22 62 14.18 121 11.72 12.02
FRESNO 0.00 6.73 60 17.20 152 11.30 11.50
HANFORD 0.00 4.70 48 11.05 112 9.89 10.10
BAKERSFIELD 0.00 3.95 62 7.82 123 6.35 6.47
BISHOP 0.00 1.49 32 9.16 196 4.67 5.18
SALINAS 0.00 7.15 57 16.45 130 12.63 12.83
PASO ROBLES 0.00 9.62 77 16.14 130 12.45 12.78
SANTA MARIA 0.00 6.01 44 18.44 134 13.76 13.95
Next report: June 30