June 20, 2019
Summary: The marine layer doubled in depth overnight from 1,5000 feet yesterday to over 3,000 feet this morning. There is a developing significant pressure difference between the coast and the interior which is resulting in a very strong surge of marine air inland. In the Delta, winds at Travis Air Force Base were sustained at 24, gusting to 30 MPH. At Pacheco Pass, winds are sustained at 29, gusting to 46 MPH. All indications are the valley’s natural summer air conditioner is on full.
All this is being brought on by a rather robust low pressure system dropping into the Pacific Northwest and northern Rockies. This low will form a trough into the Great Basin Friday, resulting in a north/northwest flow aloft. The combination of the marine influence and the generally cooler air mass will result in much cooler temperatures today and especially Friday. Some locations Friday afternoon will remain in the upper 80s.
The trough will move eastward by Saturday evening, allowing a weak ridge of high pressure to build in from the west. Temperatures by early next week will drive right back into the upper 90s. Yet another low is projected to dive southward out of the Gulf of Alaska to a position off the coast of the Pacific Northwest by the middle of next week. A repeat performance will develop as another surge of modified marine air moves down the valley, lowering temperatures Wednesday through Friday of next week. The flow aloft during that time frame will be out of the southwest, maintaining mostly clear skies.
Temperatures will warm again next weekend as high pressure builds just off the California coast.
Forecast: Mostly clear skies through Monday. Continued to be mostly clear Monday night through Thursday.
Short Term:
| Madera 90/58/88/57/93 | Reedley 92/59/88/58/94 | Dinuba 91/58/88/57/92 | |
| Porterville 93/58/89/58/94 | Lindsay 93/57/89/57/94 | Delano 93/61/89/59/94 | |
| Bakersfield 94/62/88/63/95 | Taft 91/68/90/66/95 | Arvin 95/62/90/62/95 | |
| Lamont 94 /62/89/62/95 | Pixley 92/59/89/58/93 | Tulare 92/58/90/58/92 | |
| Woodlake 92/57/90/57/92 | Hanford 92/58/88/59/94 | Orosi 92/57/89/57/93 | |
Seven Day Forecast:
| Sunday
Mostly clear 62/97 |
Monday
Mostly clear 63/98 |
Tuesday
Mostly clear 61/95 |
Wednesday
Mostly clear 56/88 |
Thursday
Mostly clear 56/89 |
Two Week Outlook: June 26 through July 2: This model has flip flopped a bit and indicates a trough of low pressure will be the more dominant feature during this time frame. If this happens, a welcome cooling trend will occur with temperatures near to possibly marginally below average with the usual dry conditions continuing.
July: July, of course, is typically hot and if this model has any credence, it will be hotter than average. With a dominant Four Corners high and a trough over the middle of the country, usual July dry conditions will prevail.
July, August, September: This model is indicating that the western U.S., including California, will experience above average temperatures overall during the mid to late summer period. Precipitation is expected to be near average, which, of course, is very little and there’s no reason to believe otherwise.
Winds: Winds will be mainly out of the northwest at times through Friday at 10 to 20 MPH. Gusts in excess of 30 MPH are possible along the west side, especially along the Interstate 5 corridor. Winds will decrease Friday night with typically summer winds out of the northwest afternoons and evenings Saturday and Sunday at 8 to 15 MPH and generally less than 10 MPH during the later night and morning hours.
Rain: Expect dry conditions for the next 7 to 10 days.
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Afternoon Dew Points Today: Mid to upper 50s. Kern: Mid to upper 50s. Humidity values ranging from 30%/80% at Hanford. Bakersfield 25%/75%
Actual Humidity June 19, 2019: Delano, 93%/33% Porterville, 77%/23%
Percentage of Sunshine Today/Tomorrow: Visalia: Today: 100%, tomorrow 100% Bakersfield: Today: 100% Tomorrow: 100%
ET Rates Over the Past Seven Days: Stratford 2.02, Parlier 1.97, Blackwell 2.29, Arvin 2.19, Orange Cove 2.07, Porterville 2.05, Delano 1.96. Courtesy University of California *=estimate, NA=not available.
Seven Day Soil Temperatures: Stratford 75, Parlier 77, Blackwell 87, Lindcove, 76, Arvin, 78, Orange Cove 79, Porterville 86, Delano 83
Record Temperatures: 110/50. Average Temperatures: 93/61
Cooling Degree Days this Season: 483 +130
Courtesy of the NWS
Average temperature for June so far: 80.0 +6.4
Precipitation: Seasonal total/average/above or below average:
Since Oct 1, 2018 Fresno: 11.85 season. or +.56. Month to Date: .00 -.19
Since Oct 1, 2018, Bakersfield: 7.80, or +1.46. Month to Date: .23 +.16
Water year season is from October 1st through September.
Chilling Hours November 1st through February 28: Orange Cove, Parlier, Arvin, Shafter, Stratford, Lindcove, Porterville,
Hours at 45 or below 45.
Sunrise: 5:40 am Sunset: 8:21 pm. Hours of Daylight: 14:41
Yesterday’s Weather:
MAE : Madera 253 : DH1700 / 99 / 64 / 0.00 /
FAT : Fresno Airport 333 : DH1700 / 102 / 74 / 0.00 /
HJO : Hanford Airport 242 : DH1700 / 103 / 71 / 0.00 /
NLC : Lemoore Naval AS 234 : DH1700 / 102 / 65 / 0.00 /
BFL : Bakersfield Airport 496 : DH1600 / 102/ 79 / 0.00 /
VIS : Visalia Airport 292 : DH1600 / 100 / 70 / 0.00 /
ATEC1 : Avenal 787 : DH1655 / 99 / 71 / 0.00 /
PTV : Porterville Airport 442 : DH1600 / 101 / 71 / 0.00 /
TFTC1 : Taft 759 : DH1657 / 102 / 78 / 0.00 /
LOSC1 : Los Banos 120 : DH1600 / M / 65 / 0.00 /
Rainfall: Water year Oct 1st through September 30th
24hr Season % L.Y. % Ave. Ave. yearly total
STOCKTON 0.00 18.37 134 9.22 67 13.75 14.06
MODESTO 0.00 13.35 104 8.17 64 12.81 13.11
MERCED 0.00 13.27 109 7.06 58 12.19 12.50
MADERA 0.00 11.42 98 7.22 62 11.71 12.02
FRESNO 0.00 11.85 105 6.73 60 11.28 11.50
HANFORD 0.00 9.50 96 4.70 48 9.88 10.10
BAKERSFIELD 0.00 7.80 123 3.95 62 6.33 6.47
BISHOP 0.00 8.47 183 1.49 32 4.63 5.18
SALINAS 0.00 13.80 109 7.15 57 12.61 12.83
PASO ROBLES 0.00 14.88 120 9.62 77 12.44 12.78
SANTA MARIA 0.00 15.68 114 6.01 44 13.75 13.95
Next report: Friday, June 21