April began with an upper-level low tracking eastward across the central California interior. This system, which brought thunderstorms to the region the last two days of March, kept temperatures near average on April 1st.  Showers developed over the Temblors and Diablo Range, bringing light rain to parts of the west side of the San Joaquin Valley, and showers also developed along the Southern Sierra Nevada. A tenth of an inch of rain fell at Bodfish, southwest of Lake Isabella, while well to the north, 0.06 inch of rain fell at Ponderosa Basin in Mariposa County.
As the low moved into the Great Basin, an upper-level ridge moved onshore, bringing a short-lived warming trend. Temperatures warmed over the northern parts of the San Joaquin Valley on the 2nd, then over the whole region of the 3rd. However, this was the last day of above-normal temperatures as the next Pacific storm rode over the ridge, pushing the ridge back over the Pacific Ocean.
The night of April 3rd-4th saw an upper-level trough along the California coast. A fetch of subtropical moisture pushed north along the leading edge of the trough and into the west side of the central California interior. Moderate showers developed over the northern half of the San Joaquin Valley, with a sharp fall-off in rain from Madera to Fresno. The Madera Municipal Airport recorded 0.55 inch of rain, while the Fresno-Yosemite International Airport only recorded 0.06 inch of rain.
This moisture moved east across the region as the low pressure system tracked toward the coast, with light showers reaching the Southern Sierra Nevada by the afternoon of the 4th. Clouds associated with this moisture, as well as the subtropical nature of the airmass, kept overnight temperatures well above normal. Fresno tied its record high minimum temperature for April 4th of 57 degrees.
Gusty winds developed across the Kern County mountains and deserts in the wake of the low. Winds gusted as high as 65 mph at Mojave, and the strongest winds of the event were from Jawbone Canyon to the Mojave area. A series of upper-level disturbances riding a westerly flow aloft kept these gusty winds going afternoons and evenings through April 7th.
Another storm system moved into northern California on April 7th, and dropped south during the day and evening. Precipitation was light, with 0.03 inch of rain falling at the Fresno-Yosemite International Airport, and 0.02 inch at the Madera Municipal and Merced Regional Airports. In contrast to the storm of April 4th which left the south end of the San Joaquin Valley dry, this storm brought measurable rain throughout the Valley. Of the major cities, Bakersfield had the highest rainfall, with 0.05 inch falling at Meadows Field.
The highest rainfall amounts were in the Southern Sierra Nevada. Yosemite Village had 0.71 inch of rain, and Isabella Dam had 0.57 inch. Ponderosa Basin had 0.29 inch of rain, Mountain Mesa reported 0.21 inch, and 0.39 inch fell at Glennville. Snow fell on the higher elevations, with an inch of new snow falling on Ponderosa (elevation 7200 feet in Tulare County). A couple of thunderstorms developed over the Southern Sierra Nevada during the morning of the 8th.
The storm brought very strong winds to the central California interior. Winds gusted to 75 mph at Mojave, 66 mph at Rosamond, 46 mph at Naval Air Station Lemoore and 39 mph at Fresno.
A cold airmass associated with the storm dropped high temperatures in the central and southern San Joaquin Valley into the mid 60s to around 70 on April 8th.
A high pressure ridge built into California from the Pacific Ocean beginning on April 9th. This high brought several degrees of warming to the region, with the warmest temperatures on the 12th and 13th.  Bakersfield saw its high temperatures rise from 64 on April 8th to 84 on the 12th, and a degree warmer the next day.

High Wind in KERN CTY MTNS, CALIFORNIA
From 08-APR-13 04:00:00 to 08-APR-13 22:00:00 (PST-8)
Magnitude: 51.00 MG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Mesonet

High Wind in SE KERN CTY DESERT, CALIFORNIA
From 05-APR-13 22:00:00 to 08-APR-13 22:00:00 (PST-8)
Magnitude: 65.00 MG
Property damage: 20.00K
Crop damage: 0.00K
Reported by: Law Enforcement