A very strong upper level high pressure system developed across the desert southwest during the last few days of June 2013. This led to a protracted period of Excessive Heat over the lower Arizona deserts, which began on June 28, and continued into the first week of July. Many high temperature records were broken during the last weekend of June, and high temperatures reached or exceeded 120 degrees across some of the hottest deserts. Phoenix Sky Harbor reached to 119 degrees on June 29; this was a record high and the first time that a high of exactly 119 was recorded at Phoenix.

Excessive Heat in SOUTHWEST DESERTS, ARIZONA
From 28-JUN-13 10:00:00 to 30-JUN-13 23:59:00 (MST-7)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Official NWS Observations

A very strong upper level high pressure system developed across the desert southwest during the last few days of June, and this led to excessive heat across the southwest Arizona deserts, beginning on June 28 and continuing through the end of the month. High temperatures at Tacna reached or exceeded 115 degrees for the last 3 days of the month. An Excessive Heat Warning was issued at 10 am Friday, June 28th and it ran through the end of June and into the first week of July.

Excessive Heat in WEST CENTRAL DESERTS, ARIZONA
From 28-JUN-13 10:00:00 to 30-JUN-13 23:59:00 (MST-7)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Official NWS Observations

A very strong upper level high pressure system developed across the desert southwest during the last few days of June, and this led to excessive heat across the west central Arizona deserts, beginning on June 28 and continuing through the end of the month. High temperatures at Bouse reached or exceeded 117 degrees for the last 3 days of the month, including a high of 119 on the 29th of June! An Excessive Heat Warning was issued at 10 am Friday, June 28th and it ran through the end of June and into the first week of July.

Excessive Heat in LOWER COLORADO RIVER VALLEY, ARIZONA
From 28-JUN-13 10:00:00 to 30-JUN-13 23:59:00 (MST-7)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Official NWS Observations

A very strong upper level high pressure system developed across the desert southwest during the last few days of June, and this led to excessive heat along the Lower Colorado River Valley beginning on June 28 and continuing through the end of the month. High temperatures exceeded 115 degrees for the last 3 days of the month, including a high of 121 at Parker on the 29th of June! An Excessive Heat Warning was issued at 10 am Friday, June 28th and it ran through the end of June and into the first week of July.

Excessive Heat in NORTHWEST MARICOPA COUNTY, ARIZONA
From 28-JUN-13 10:00:00 to 30-JUN-13 23:59:00 (MST-7)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Official NWS Observations

A very strong upper level high pressure system developed across the desert southwest during the last few days of June, and this led to excessive heat across northwest Maricopa County, beginning on June 28 and continuing through the end of the month. High temperatures across the hotter lower desert locations exceeded 115 degrees over the last 3 days of the month. Low temperatures during the last weekend of the month reached into the low to middle 80s, offering little or no relief from the oppressive daytime heat. An Excessive Heat Warning was issued at 10 am Friday, June 28th and it ran through the end of June and into the first week of July.

Excessive Heat in YUMA/MARTINEZ LAKE AND VICINITY, ARIZONA
From 28-JUN-13 10:00:00 to 30-JUN-13 23:59:00 (MST-7)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: ASOS

A very strong upper level high pressure system developed across the desert southwest during the last few days of June, and this led to excessive heat across far southwest Arizona, beginning on June 28 and continuing through the end of the month. High temperatures at Yuma were well in excess of 110 degrees for the last 3 days of the month, including a record high of 118 on the 29th of June!  Low temperatures during the last weekend of the month reached into the upper 80s at Yuma, offering little or no relief from the oppressive daytime heat. An Excessive Heat Warning was issued at 10 am Friday, June 28th and it ran through the end of June and into the first week of July.

Excessive Heat in SOUTHWEST MARICOPA COUNTY, ARIZONA
From 28-JUN-13 10:00:00 to 30-JUN-13 23:59:00 (MST-7)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Official NWS Observations

A very strong upper level high pressure system developed across the desert southwest during the last few days of June, and this led to excessive heat across southwestern Maricopa County, beginning on June 28 and continuing through the end of the month. High temperatures at Gila Bend were at or above 115 degrees for the last 3 days of the month. Low temperatures during the last weekend of the month climbed into the middle 80s, offering little or no relief from the oppressive daytime heat. An Excessive Heat Warning was issued at 10 am Friday, June 28th and it ran through the end of June and into the first week of July.

Excessive Heat in CENTRAL DESERTS, ARIZONA
From 28-JUN-13 10:00:00 to 30-JUN-13 23:59:00 (MST-7)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Official NWS Observations

A very strong upper level high pressure system developed across the desert southwest during the last few days of June, and this led to excessive heat across the central Arizona deserts, beginning on June 28 and continuing through the end of the month. High temperatures at Coolidge and Casa Grande were in excess of 110 degrees each day, with a high of 116 recorded at Coolidge on June 28th. An Excessive Heat Warning was issued at 10 am Friday, June 28th and it ran through the end of June and into the first week of July.

Excessive Heat in GREATER PHOENIX AREA, ARIZONA
From 28-JUN-13 10:00:00 to 30-JUN-13 23:59:00 (MST-7)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: ASOS

A very strong upper level high pressure system developed across the desert southwest during the last few days of June, and this led to excessive heat across the lower south central Arizona deserts, beginning on June 28 and continuing through the end of the month. High temperatures at Phoenix Sky Harbor were at or above 115 degrees for the last 3 days of the month, including a record high of 119 on the 29th of June! That was the first time that a high of 119 was recorded at Phoenix. Low temperatures during the last weekend of the month exceeded 90 degrees in central Phoenix, offering little or no relief from the oppressive daytime heat. An Excessive Heat Warning was issued at 10 am Friday, June 28th and it ran through the end of June and into the first week of July.