A strong upper level ridge moved into the Southwestern United States on May 13th, causing temperatures to soar above seasonal normals through the 15th before gradually falling back towards seasonal average.

Heat in ORANGE COUNTY INLAND, CALIFORNIA
From 13-MAY-22 00:00:00 to 15-MAY-22 23:59:00 (PST-8)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: ASOS

Temperatures soared well above seasonal normals starting May 13th and lasting through the 15th. Yorba Linda reached a high of 94 degrees on the 13th while John Wayne International Airport reached 86 degrees. The hottest temperatures occurred on the 14th, when Yorba Linda recorded a high of 95 degrees, while John Wayne International recorded a high of 87 degrees. Temperatures were a bit lower on the 15th, when Yorba Linda topped out at 86 degrees and John Wayne International reached 77 degrees.

Heat in SAN BERNARDINO AND RIVERSIDE COUNTY VALLEYS - THE INLAND EMPIRE, CALIFORNIA
From 13-MAY-22 00:00:00 to 15-MAY-22 23:59:00 (PST-8)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: ASOS

Temperatures soared well above seasonal normals starting May 13th and lasting through the 15th. Many locations in the Inland Empire reached the middle to upper 90s on the 13th, when Chino Airport hit 97 degrees, Riverside Airport (RAL) reached 95 degrees, and San Bernardino International Airport reached 95 degrees. Several locations reached the upper 90s to just over 100 degrees on the 14th. Chino reached 101 degrees, Riverside Airport reached 98 degrees, and San Bernardino International Airport reached 99 degrees. Slightly cooler temperatures were observed on the 15th, with all three of the aforementioned locations reaching 91 degrees.

Heat in SAN DIEGO COUNTY VALLEYS, CALIFORNIA
From 13-MAY-22 00:00:00 to 15-MAY-22 23:59:00 (PST-8)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: ASOS

Temperatures soared well above seasonal normals starting May 13th and lasting through the 15th. High temperatures topped out in the middle 80s to lower 90s on the 13th, when the Ramona Airport reached 92 degrees and Gillespie Field reached 90 degrees. Temperatures reached the upper 80s to middle 90s across many inland valley areas on the 14th. The Ramona Airport reached 96 degrees, while Gillespie Field reached 93 degrees. Slightly cooler temperatures were observed on the 15th, with Ramona reaching 91 degrees and Gillespie Field reaching 84 degrees.

Heat in APPLE AND LUCERNE VALLEYS, CALIFORNIA
From 13-MAY-22 00:00:00 to 15-MAY-22 23:59:00 (PST-8)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Mesonet

Temperatures soared well above seasonal normals starting May 13th and lasting through the 15th. On the 13th, Hesperia reached a high temperature of 85 degrees while Apple Valley topped out at 87 degrees. The hottest temperatures occurred on the 14th, when Hesperia reached 92 degrees while Apple Valley topped out near 94 degrees. Slightly cooler temperatures were observed on the 15th, with Hesperia reaching 86 degrees and Apple Valley reaching 90 degrees.

Heat in SAN BERNARDINO AND RIVERSIDE COUNTY VALLEYS - THE INLAND EMPIRE, CALIFORNIA
From 13-MAY-22 00:00:00 to 15-MAY-22 23:59:00 (PST-8)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Mesonet

Temperatures soared well above seasonal normals starting May 13th and lasting through the 15th. Palm Springs reached 99 degrees on the 13th, 107 degrees on the 14th and 108 degrees on the 15th. Thermal reached 99 degrees on the 13th, 106 degrees on the 14th and 107 degrees on the 15th.

Heat in SAN DIEGO COUNTY DESERTS, CALIFORNIA
From 13-MAY-22 00:00:00 to 15-MAY-22 23:59:00 (PST-8)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Mesonet

Temperatures soared well above seasonal normals starting May 13th and lasting through the 15th. Ocotillo Wells reached 100 degrees on the 13th, 107 degrees on the 14th and 112 degrees on the 15th.

Heat in SAN DIEGO COUNTY MOUNTAINS, CALIFORNIA
From 13-MAY-22 00:00:00 to 15-MAY-22 23:59:00 (PST-8)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Mesonet

Temperatures soared well above seasonal normals starting May 13th and lasting through the 15th. Julian reached 81 degrees on the 13th, 86 degrees on the 14th and 81 degrees on the 15th.

Heat in RIVERSIDE COUNTY MOUNTAINS, CALIFORNIA
From 13-MAY-22 00:00:00 to 15-MAY-22 23:59:00 (PST-8)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Mesonet

Temperatures soared well above seasonal normals starting May 13th and lasting through the 15th. On the 13th, El Cariso reached 88 degrees while Anza reached 87 degrees. The hottest temperatures occurred on the 14th, when El Cariso reached 93 degrees while Anza reached 90 degrees. Cooler temperatures were observed on the 15th, when El Cariso reached 89 degrees and Anza reached 86 degrees.