High pressure built into Southern California on April 22nd and continued through April 30th. The deserts experienced the most extreme heat, but the coast and valleys also had multiple days with record breaking heat. Palm Springs International Airport recorded 8 days with high temperatures exceeding 101 degrees, which has not occurred since April of 1945. According to San Diego County, there were 31 heat related calls placed by residents from April 24th through the 30th, with 22 of them transported to the hospital. With onshore flow and high pressure overhead, dense fog occurred at a few coastal San Diego locations on April 25th and 26th.

Heat in SAN BERNARDINO AND RIVERSIDE COUNTY VALLEYS - THE INLAND EMPIRE, CALIFORNIA
From 24-APR-20 10:00:00 to 25-APR-20 17:00:00 (PST-8)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: ASOS

High temperatures in the upper 90s to 101 degrees were observed in the Inland Empire on the 24th and 25th.

Heat in ORANGE COUNTY INLAND, CALIFORNIA
From 24-APR-20 10:00:00 to 25-APR-20 17:00:00 (PST-8)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: ASOS

High temperatures in the upper 90s to 100 degrees were observed in Inland Orange County on the 24th and 25th.

Excessive Heat in COACHELLA VALLEY, CALIFORNIA
From 24-APR-20 13:00:00 to 30-APR-20 20:00:00 (PST-8)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: ASOS

High temperatures of 100 to 106 degrees were observed in the Coachella Valley from the 24th through the 30th.

Excessive Heat in SAN DIEGO COUNTY DESERTS, CALIFORNIA
From 24-APR-20 13:00:00 to 30-APR-20 20:00:00 (PST-8)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: ASOS

High temperatures of 100 to 105 degrees were recorded in the San Diego County deserts from the 24th through the 30th.

Excessive Heat in APPLE AND LUCERNE VALLEYS, CALIFORNIA
From 28-APR-20 09:00:00 to 29-APR-20 19:00:00 (PST-8)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: ASOS

High temperatures of 90 to 95 degrees were recorded in the High Desert on the 28th and 29th.

Dense Fog in SAN DIEGO COUNTY COASTAL AREAS, CALIFORNIA
From 25-APR-20 04:00:00 to 25-APR-20 08:00:00 (PST-8)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: ASOS

Brown Field reported 1/4 mile visibility from 0400 to 0800 PST.

Dense Fog in SAN DIEGO COUNTY COASTAL AREAS, CALIFORNIA
From 25-APR-20 04:00:00 to 25-APR-20 08:00:00 (PST-8)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: ASOS

Carlsbad Airport (CRQ) reported 1/4 mile visibility from 0400 to 0800 PST.

Dense Fog in SAN DIEGO COUNTY COASTAL AREAS, CALIFORNIA
From 25-APR-20 04:00:00 to 25-APR-20 08:00:00 (PST-8)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: ASOS

MCAS Miramar (NKX) reported 1/4 mile visibility from 0400 to 0800.

Dense Fog in SAN DIEGO COUNTY COASTAL AREAS, CALIFORNIA
From 25-APR-20 22:00:00 to 25-APR-20 23:00:00 (PST-8)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: ASOS

Brown Field reported 1/8 mile visibility from 2200 to 2300 PST.

Dense Fog in SAN DIEGO COUNTY COASTAL AREAS, CALIFORNIA
From 26-APR-20 01:00:00 to 26-APR-20 03:00:00 (PST-8)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: ASOS

Montgomery Field (MYF) reported dense fog with visibility of 1/4 mile from 0100 to 0300 PST.

Dense Fog in SAN DIEGO COUNTY COASTAL AREAS, CALIFORNIA
From 26-APR-20 05:00:00 to 26-APR-20 07:00:00 (PST-8)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: ASOS

San Diego Airport (SAN) reported dense fog with 1/4 mile visibility between 0500 and 0700 PST.