Porterville Weather 
National Weather Service - Local Forecast
Porterville, California
Updated: Friday, May 16 2008 - 12:42 AM PDT
Today
Sunny High: 101° |
Tonight
Hot Low: 61° |
Sat
Sunny High: 102° |
Sat night
Hot Low: 62° |
Sun
Sunny High: 103° |
Sun night
Hot Low: 60° |
Mon
Sunny High: 98° |
LOCAL FORECAST DETAILS
NATIONAL WEATHER SERVICE - Digital Forecasts
Updated: Friday, May 16 2008 - 12:42 AM PDT
Location: Porterville, CA
Today... Clear. Highs 91 to 101. Light winds from the west up to 8 mph.
Tonight... Hot. Lows 61 to 73. Light winds from the south up to 7 mph.
Saturday... Clear. Highs 92 to 102. Light winds from the south-southwest up to 8 mph.
Saturday night... Hot. Lows 62 to 74. Light winds from the south up to 7 mph.
Sunday... Clear. Highs 85 to 103. Light winds from the west up to 8 mph.
Sunday night... Hot. Lows 60 to 79. Light winds from the southwest up to 6 mph.
Monday... Clear. Highs 77 to 98. Light winds from the west-southwest up to 7 mph.
Monday night... Hot. Lows 58 to 75. Light winds from the southwest up to 5 mph.
Tuesday... Clear. Highs around 94.
Tuesday night... Sunny. Lows around 58.
Wednesday... Clear. Highs around 90.
Wednesday night... Mostly sunny. Lows around 58.
Thursday... Clear. Highs around 89.
TECHNICAL FORECAST DISCUSSION
NATIONAL WEATHER SERVICE - SAN JOAQUIN VALLEY / HANFORD, CA
Issued: Thursday, May 15 2008 - 9:06 PM PDT
Update...updated temperatures based on today/s observations.
Discussion...the upper-level ridge is firmly in place over the western states...bringing a strong warming trend and continued dry weather to the region. Central and southern San Joaquin Valley high temperatures today ranged from 96 at Madera municipal airport to 100 at both Coalinga and Delano...the first 100/s of the year at official climate stations. Coalinga and Delano also were the hot spots in the entire Hanford warning/forecast area.
High temperatures will continue to increase through the weekend as the upper-level ridge core drops south...from its current position over the Oregon coast to over the San Francisco bay area Saturday afternoon...and over the Central California interior Sunday. By 00z Monday...1000-500-mb thicknesses over the Hanford warning/forecast area increase to 5820 meters...and 850-mb temperatures warm from 24 c Friday and Saturday to 26 c Sunday. In addition...the Sun angle continues to increase...decreasing shadows from the mountains and bringing more direct solar heating. Therefore...temperatures will continue to increase a degree or two daily through Sunday...which will be the warmest day of the forecast period. Although temperatures over the weekend will be 15-20 degrees above normal... This is not that uncommon. Historically...the 50-year average date for the first 100-degree day is may 27th at Bakersfield...and June 6th at Fresno...with the earliest date of April 23rd for both cities /in 1910/. Record temperatures will be approached Friday through Sunday /see below/. Therefore...will continue the special weather statement /see sfospshnx or wwus86 khnx/ for heat-related safety tips. With the heat continuing unabated into the weekend...people will be heading into the southern Sierra Nevada to escape the heat...so have added a section on snow melt and a caution about the dangers of the cold...swift flows in mountain rivers...streams and creeks.
An upper-level trough moving into the Pacific Northwest Monday will knock down the ridge and bring a few degrees cooling...although temperatures will continue around 12-15 degrees above normal.
Bakersfield Fresno
high low high low
Thursday may 15th observed 99 66 97 64 record * 103 in 1927 71 in 1972 102 in 1927 70 in 2006
Friday may 16th forecast 101 68 100 68 record * 105 in 1970 70 in 1973 103 in 1970 68 in 1905
Saturday may 17th forecast 102 68 101 68 record * 103 in 1970 71 in 2006 100 in 1973 70 in 2006
Sunday may 18th forecast 103 69 102 67 record * 102 in 1973 76 in 1973 102 in 1973 70 in 2006
Monday may 19th forecast 98 67 98 65 record * 101 in 1954 73 in 1979 101 in 1947 66 in 1997
Record high and high minimum temperatures
Aviation...high pressure over the West Coast will result in vfr conditions prevailing over the district through 06z Saturday.
Air quality issues... None.
HNX watches/warnings/advisories... None.
HAZARDOUS WEATHER OUTLOOK
Hazardous Weather Outlook is currently unavailable...