August 27, 2018
Summary: Temperatures Sunday afternoon rose into the upper 90s at several locations, but no location reached the 100 degree mark. a reversal will occur again beginning today as a weak trough of low pressure starts to stretch from western Canada down into the northern Great Basin. Once again, the on shore flow is increasing as the marine layer has now jumped up to 2,500 feet at Monterey. At last report, winds at Travis Air Force Base in the Delta were out of the southwest at 20 MPH, gusting to 32. Further south, Pacheco Pass was reporting winds gusting to 35 MPH. how much temperature fall we’ll enjoy will be determined by how much of that modified sea breeze pools on the valley floor. It appears low to mid 90s are likely today and possibly even upper 80s to lower 90s Tuesday and Wednesday.
Satellite imagery indicates clear skies over California. There are some mid and high level clouds off the southern California coast which may make it far enough into the south valley to perhaps add a little bit of interest to the sky tonight and Tuesday. Even so, skies will be generally clear.
The high has weakened a tad. I noted the freezing level at Vandenberg has dropped to 14,800 feet.
By Thursday, the high will increase just a bit over California for perhaps about 2 degrees of warming, however the overall pattern through Friday shows a weak trough over the interior west and high pressure suppressed southward in to Baja.
The pattern for Sunday and Monday is a bit speculative at this time. There is some indication a weak low will develop over northern California which, theoretically, could drop some monsoonal moisture from the south or southeast. For now, we’ll keep that out of the forecast as it’s entirely possible this moisture will affect southern California, but not central California.
Forecast: Clear skies today. Mostly clear tonight and Tuesday with possibly some mid and high level clouds mixing in. mostly clear Wednesday and on through Monday of next week.
Short Term:
| Madera 91/58/88/58/90 | Reedley 92/59/90/58/91 | Dinuba 91/59/89/59/90 | |
| Porterville 94/60/91/58/92 | Lindsay 94/59/90/59/91 | Delano 93/62/91/60/92 | |
| Bakersfield 95/66/91/64/92 | Arvin 95/63/91/62/92 | Taft 93/67/91/67/92 | |
| Lamont 95/63/91/61/93 | Pixley 94/61/90/60/91 | Tulare 92/59/89/58/90 | |
| Woodlake 94/58/90/59/91 | Hanford 94/60/90/59/91 | Orosi 93/60/90/58/91 | |
Seven Day Forecast:
| Thursday
Mostly clear 59/91 |
Friday
Mostly clear 61/91 |
Saturday
Mostly clear 60/93 |
Sunday
Mostly clear 60/91 |
Monday
Mostly clear 59/93 |
Two Week Outlook: September 3 through September 9: This model indicates we will be sandwiched between two weather systems. The first is a low over the Pacific Northwest. The other is a high center somewhere over the Desert Southwest. This pattern will be conducive for monsoonal moisture to move through Arizona and possibly parts of southern California. For now, it would look like a southwesterly flow aloft will prevail, giving central California mostly clear skies with marginally above average temperatures.
September: This model indicates there will be a higher than active monsoon over the Desert Southwest and possibly central and southern California. This typically does not affect the valley floor other than cloud cover, but could result in a larger number of days of thunderstorms over the Sierra Nevada and possibly even the Kern County mountains. With generally high pressure over the southwest, temperatures will likely be somewhat above seasonal average.
September, October, November: The first part of this time frame will see a more active than usual monsoon in place for above average rain over the Sierra Nevada and possibly the mountains and deserts of southern California. October and November’s conditions aren’t as easy to determine. At this time we’ll call for generally average values for both rain and temperatures.
Winds: Winds will be mainly out of the west or northwest at 5 to 15 MPH through Tuesday with local gusts to near 20 MPH. Winds along the Interstate 5 corridor could gust to around 30 MPH through Tuesday. Winds Wednesday and Thursday will be mainly out of the northwest at 5 to 12 MPH with locally stronger gusts.
Rain: Expect dry conditions indefinitely.
Afternoon Dew Points Today: Low to mid 50s. Kern: Upper 40s to the lower 50s.
Humidity: Visalia: 25%/85% Bakersfield: 20%/65%
Actual Humidity August 26, 2018: Delano, 97%/25%, Porterville, 82%/20%
Percentage of Sunshine Today/Tomorrow: Visalia: Today: 100% tomorrow 80% Bakersfield: Today: 100% Tomorrow: 80%
ET Rates Over the Past Seven Days: Stratford 1.76, Parlier 1.65, Blackwell 2.06, Lindcove 1.65, Arvin 1.95, Orange Cove 1.82, Porterville 1.54, Delano 1.64, Madera Two NA. Courtesy University of California *=estimate, NA=not available.
Seven Day Soil Temperatures: Stratford 74, Parlier 80, Blackwell 87, Lindcove, 78, Arvin, NA, Orange Cove 79, Porterville 84, Delano 78, Madera Two, NA
Record Temperatures: 109/51. Average Temperatures: 95/63
Cooling Degree Days this Season: 1690 +419
Courtesy of the NWS
Average temperatures for August so far, 81.7 +3.2
Precipitation: Seasonal total/average/above or below average:
Since Oct 1, 2017 Fresno: 6.73 season. or -4.60. Month to Date: .00
Since Oct 1, 2017, Bakersfield: 3.93, or -2.43. 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: 6:27 am Sunset: 7:33 pm. Hours of Daylight: 13:07
Yesterday’s Weather:
MAE : Madera 253 : DH1700 / 97 / 57 / 0.00 /
FAT : Fresno Airport 333 : DH1700 / 97 / 65 / 0.00 /
HJO : Hanford Airport 242 : DH1700 / 96 / 60 / 0.00 /
NLC : Lemoore Naval AS 234 : DH1700 / 97 / 60 / 0.00 /
BFL : Bakersfield Airport 496 : DH1700 / 97 / 69 / 0.00 /
VIS : Visalia Airport 292 : DH1700 / 94 / 58 / 0.00 /
ATEC1 : Avenal 787 : DHM / M / M / M /
PTV : Porterville Airport 442 : DH1700 / 95 / 60 / 0.00 /
TFTC1 : Taft 759 : DH1647 / 95 / 71 / 0.00 /
Rainfall: Water year Oct 1st through September 30th
Year % Last Y. % Ave. Annual ave.
STOCKTON 0.00 9.22 67 21.79 158 13.77 14.06
MODESTO 0.00 8.17 64 16.93 132 12.85 13.11
MERCED 0.00 7.06 58 16.03 131 12.20 12.50
MADERA 0.00 7.22 61 14.18 121 11.76 12.02
FRESNO 0.00 6.73 59 17.20 152 11.33 11.50
HANFORD 0.00 4.70 47 11.05 111 9.92 10.10
BAKERSFIELD 0.00 3.95 62 7.82 123 6.38 6.47
BISHOP 0.00 3.02 61 9.18 185 4.96 5.18
SALINAS 0.00 7.16 57 16.45 130 12.66 12.83
PASO ROBLES 0.00 9.62 77 16.14 129 12.53 12.78
SANTA MARIA 0.00 6.01 44 18.44 134 13.80 13.95
Next report: August 28