June 4, 2021
The center of circulation of the strong upper high is now near the Nevada/Utah border. The freezing level is still quite high, but lower than it’s been over the past 72 hours with a reading of 15,600 feet over Oakland. At the surface, a weak on shore flow is evident. The current altimeter reading at SFO is 29.91 inches of mercury while at Vegas, the current reading is 29.71. the marine layer has deepened slightly and stands at 1,800 feet at Monterey. A shallow intrusion of modified sea breeze continues through Pacheco Pass where winds are sustained at 77 MPH. this weak push of marine air lowered the temperature to 98 degrees yesterday at Merced and 95 at Los Banos. It’s possible that, as far south as Madera County, readings could fall into the upper 90s today while from Fresno County south, widespread triple digits will continue.
The pattern is changing, however. A trough of low pressure will sag southward into the Pacific Northwest over the weekend. A cut off low is also developing off the central coast. Look for temperatures to lower incrementally. By Sunday night and Monday, that trough will sink down into northern California, rapidly deepening the marine layer and allowing that modified sea breeze to surge down the valley. By Monday, temperatures will drop to near seasonal averages which, at this point, are in the upper 80s.
For Tuesday through Wednesday, a robust trough of low pressure will dig southward from the Pacific Northwest and into California. The flip side of the equation will finally arrive with a return to below average temperatures. By next weekend, it appears California will be sandwiched between a big low off the Pacific Northwest and upper level high pressure over the Four Corners region. This pattern is conducive for the first monsoonal flow of the season next weekend and into the following week.
Forecast: Mostly clear skies through Monday with occasional high clouds and a slow cooling trend. Mostly clear Monday night through Friday with occasional high clouds and cooler.
Short Term:
| Madera 99/62/98/60/94 | Reedley 102/62/100/59/96 | Dinuba 101/61/99/59/95 |
| Porterville 103/63/99/60/97 | Lindsay 103/62/100/58/96 | Delano 103/63/101/60/97 |
| Bakersfield 102/74/101/70/97 | Taft 101/74/99/68/95 | Arvin 102/64/100/63/97 |
| Lamont 103/66/100/63/96 | Pixley 103/64/100/60/97 | Tulare 101/61/99/59/95 |
| Woodlake 102/62/100/59/96 | Hanford 102/64/100/64/97 | Orosi 102/61/99/58/95 |
Seven Day Forecast:
| Monday
Mostly clear 57/94 |
Tuesday
Mostly clear 53/89 |
Wednesday
Mostly clear 50/85 |
Thursday
Mostly clear 49/85 |
Friday
Mostly clear 51/86 |
Two Week Outlook: June 10 through June 16: This model indicates a ridge of high pressure will be over the western states with a trough just off shore, resulting in near to marginally above average temperatures with dry conditions. This model is also hinting at the beginning of the monsoon season with a southerly flow moving into the Desert Southwest.
June: This model is indicating a ridge of upper level high pressure will be more dominant over the Desert Southwest and, to a lesser extent, California, resulting in above average temperatures for the month with the usual dry conditions prevailing.
June, July, August: This model mimics the pattern of recent years, indicating high pressure over the Desert Southwest being the most dominant feature, resulting in above average temperatures. Theoretically, this pattern blocks monsoonal moisture from moving northward. Typically, there’s little to no precipitation anyway, and that will be the case this summer.
Winds Discussion: Winds during the afternoons and evenings will be mainly out of the northwest at 8 to 15 MPH with locally stronger gusts. Winds during the night and morning hours will be mainly out of the northwest at 5 to 10 MPH with periods of near calm conditions, through Monday. For Sunday through Monday, there will be periods of winds out of the northwest at 10 to 20 MPH. Gusts to 35 MPH are possible along the I-5 corridor.
Afternoon Dew Points Today: Low to mid 50s. Upper 40s to the lower 50s.
Actual Humidity Range Yesterday: Delano, NA%/NA% Porterville, 72%/18%
Percentage of Sunshine Today/Tomorrow: Visalia: Today: 90%, tomorrow 80%. Bakersfield: Today: 90% Tomorrow: 80%
ET Rates Over the Past Seven Days:. Stratford 2.10, Parlier 1.96, Arvin 2.12, Orange Cove 2.15, Porterville 1.98, Delano NA. Courtesy University of California *=estimate, NA=not available.
Seven Day Soil Temperatures: Stratford 74, Parlier 81, Arvin, 78, Orange Cove 81, Porterville NA, Delano 80.
Record Temperatures: 105/46. Average Temperatures: 88/58
Cooling Degree Days This Season:. 298 +67 Varies widely from location to location. courtesy of the NWS
Average Temperature for this month So Far: 84.5 +11.5 courtesy of the NWS
Precipitation: Seasonal total for Fresno, 6.59 or -4.12 or 62% of average. Month to Date: .00 or -04
Precipitation for Bakersfield, Season, 2.77, +or- -3.50 or 44% of average. Month to date .00 or -.01
Water year season is from October 1st through September 30.
Chilling Hours November 1st through February 28: Orange Cove, , Parlier, , Arvin, , Belridge, , Shafter, , Stratford, , Delano, , Porterville,
Hours at 45 or below 45. Courtesy UC Davis
Sunrise: 5:41 am Sunset: 8:14 Hours of Daylight: 14:34
Yesterday’s Weather
MCE : Merced 153 : DH1700 / 98 / 62 / 0.00 /
MAE : Madera 253 : DH1700 / 100 / 63 / 0.00 /
FAT : Fresno Airport 333 : DH1700 / 102 / 70 / 0.00 /
HJO : Hanford Airport 242 : DH1700 / 103 / 66 / 0.00 /
NLC : Lemoore Naval AS 234 : DH1700 / 102 / 64 / 0.00 /
BFL : Bakersfield Airport 496 : DHM / 102 / 75 / 0.00 /
VIS : Visalia Airport 292 : DH1700 / 101 / 66 / 0.00 /
PTV : Porterville Airport 442 : DH1700 / 102 / 65 / 0.00 /
TFTC1 : Taft 759 : DH1651 / 105 / 69 / 0.00 /
LOSC1 : Los Banos 120 : DH1600 / 95 / 62 / 0.00 /
Rainfall: 24hr W.Y. % Last Y. % Ave. Year ave.
STOCKTON 0.00 7.88 59 8.35 63 13.28 13.45
MODESTO 0.00 7.12 59 6.88 57 12.08 12.27
MERCED 0.00 7.00 60 0.00 0 11.66 11.80
MADERA 0.00 M M M M 10.63 10.79
FRESNO 0.00 6.59 62 0.00 0 10.71 10.99
HANFORD 0.00 4.29 53 0.00 0 8.02 8.13
BAKERSFIELD 0.00 2.77 44 0.00 0 6.27 6.36
BISHOP 0.00 1.62 37 2.25 51 4.37 4.84
SALINAS T 5.75 46 9.16 74 12.44 12.58
PASO ROBLES 0.00 6.74 56 11.37 95 11.97 12.15
SANTA MARIA 0.00 6.87 52 10.53 80 13.16 13.32
Next report: June 5/am