Arizona, 2019

Excessive Heat and Heat in Arizona, September 6 to 9, 2019

September 6 to 9, 2019 · NWS PSR · 17 events in 12 counties and zones

The Desert Southwest remained under the influence of high pressure during the early part of September, leading to above normal temperatures and excessive heat warning conditions at times. Seven direct fatalities were reported by the Maricopa County Department of Public Health.

Where it happened

Every event with a place to put it; 17 filed by county or forecast zone are drawn at its center, in a lighter ring. Tap one for its entry below.

  • Tornadoes
  • Tropical storms and surge
  • Floods
  • Wind
  • Hail
  • Winter weather
  • Heat and drought
  • Cold
  • Fire, smoke and dust
  • Marine and coastal
  • Other

Open the live radar over this ground

The toll

Deaths
7
Injuries
0
Property damage
None recorded
Crop damage
None recorded
Events
17

Deaths and injuries are direct and indirect together, as the offices filed them. Damage is property and crops in the dollars of the year, not adjusted for inflation, and only where an office estimated it.

What happened

The episode as NWS PSR wrote it up.

The Desert Southwest remained under the influence of high pressure during the early part of September, leading to above normal temperatures and excessive heat warning conditions at times. Seven direct fatalities were reported by the Maricopa County Department of Public Health.

What forecasters said that day

The local office's own words before the first event, as it sent them, from the Iowa Environmental Mesonet's archive of National Weather Service text.

NWS Phoenix, AZ wrote its last area forecast discussion before the first event at Sep 5, 10:59 PM MST, 1 hour 1 minute earlier.

Area forecast discussion, Sep 5, 10:59 PM MST, 1 hour 1 minute before
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In the hours before

Special weather statement, Sep 5, 6:01 PM MST, 5 hours 59 minutes before
Special Weather Statement
National Weather Service Phoenix AZ
601 PM MST Thu Sep 5 2019

AZZ539-060145-
Gila Bend AZ-
601 PM MST Thu Sep 5 2019

...SIGNIFICANT WEATHER ADVISORY FOR MARICOPA COUNTY UNTIL 645 PM
MST...

At 601 PM MST, Doppler radar was tracking a strong thunderstorm 9
miles east of Sentinel, or 22 miles west of Gila Bend, moving
northeast at 10 mph.

Winds in excess of 40 mph will be possible with this storm.

Locations impacted include...
Gila Bend.

This includes AZ Interstate 8 between mile markers 90 and 111.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Frequent cloud to ground lightning is occurring with this storm.
Lightning can strike 10 miles away from a thunderstorm. Seek a safe
shelter inside a building or vehicle.

&&

LAT...LON 3278 11305 3286 11317 3309 11303 3295 11277
TIME...MOT...LOC 0101Z 219DEG 10KT 3288 11306

Hernandez
Special weather statement, Sep 5, 6:16 PM MST, 5 hours 44 minutes before
Special Weather Statement
National Weather Service Phoenix AZ
616 PM MST Thu Sep 5 2019

AZZ533-060200-
Central La Paz AZ-
616 PM MST Thu Sep 5 2019

...SIGNIFICANT WEATHER ADVISORY FOR EAST CENTRAL LA PAZ COUNTY UNTIL
700 PM MST...

At 616 PM MST, Doppler radar was tracking a strong thunderstorm near
Harcuvar, or 29 miles south of Alamo Lake, moving north at 10 mph.

Wind gusts of 50 to 55 mph will be possible with this storm.

Locations impacted include...
Salome, Harcuvar and Wenden.

This includes US Highway 60 between mile markers 54 and 58.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Frequent cloud to ground lightning is occurring with this storm.
Lightning can strike 10 miles away from a thunderstorm. Seek a safe
shelter inside a building or vehicle.

&&

LAT...LON 3376 11359 3375 11376 3398 11381 3399 11353
TIME...MOT...LOC 0116Z 181DEG 10KT 3384 11368

Hernandez
Special weather statement, Sep 5, 6:43 PM MST, 5 hours 17 minutes before
Special Weather Statement
National Weather Service Phoenix AZ
643 PM MST Thu Sep 5 2019

AZZ533-060230-
Central La Paz AZ-
643 PM MST Thu Sep 5 2019

...SIGNIFICANT WEATHER ADVISORY FOR EAST CENTRAL LA PAZ COUNTY UNTIL
730 PM MST...

At 643 PM MST, Doppler radar was tracking a strong thunderstorm 7
miles southeast of Brenda, or 43 miles southeast of Parker, moving
north at 10 mph.

Winds in excess of 40 mph will be possible with this storm.

Locations impacted include...
Brenda and Vicksburg Junction.

This includes the following highways...
AZ Interstate 10 between mile markers 34 and 49.
US Highway 60 between mile markers 34 and 52.
AZ Route 72 between mile markers 47 and 49.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Frequent cloud to ground lightning is occurring with this storm.
Lightning can strike 10 miles away from a thunderstorm. Seek a safe
shelter inside a building or vehicle.

&&

LAT...LON 3351 11375 3353 11394 3374 11400 3375 11365
TIME...MOT...LOC 0143Z 187DEG 10KT 3363 11384

Hernandez
Special weather statement, Sep 5, 7:59 PM MST, 4 hours 1 minute before
Special Weather Statement
National Weather Service Phoenix AZ
759 PM MST Thu Sep 5 2019

AZZ533-060345-
Central La Paz AZ-
759 PM MST Thu Sep 5 2019

...SIGNIFICANT WEATHER ADVISORY FOR EAST CENTRAL LA PAZ COUNTY UNTIL
845 PM MST...

At 759 PM MST, Doppler radar was tracking a strong thunderstorm near
Vicksburg, or 34 miles south of Alamo Lake, moving north at 5 mph.

Winds in excess of 40 mph will be possible with this storm.

Locations impacted include...
Vicksburg and Vicksburg Junction.

This includes the following highways...
US Highway 60 between mile markers 47 and 49.
AZ Route 72 between mile markers 38 and 49.

LAT...LON 3372 11370 3372 11384 3387 11389 3387 11363
TIME...MOT...LOC 0259Z 181DEG 5KT 3379 11377

Hernandez
Special weather statement, Sep 5, 9:21 PM MST, 2 hours 39 minutes before
Special Weather Statement
National Weather Service Phoenix AZ
921 PM MST Thu Sep 5 2019

AZZ533-060500-
Central La Paz AZ-
921 PM MST Thu Sep 5 2019

...SIGNIFICANT WEATHER ADVISORY FOR NORTH CENTRAL LA PAZ COUNTY UNTIL
1000 PM MST...

At 921 PM MST, Doppler radar was tracking a strong thunderstorm 11
miles northeast of Bouse, or 21 miles southeast of Parker Dam, moving
north at 10 mph.

Winds in excess of 40 mph will be possible with this storm.

This storm will remain over mainly rural areas of north central La
Paz County.

LAT...LON 3395 11379 3397 11394 3422 11401 3418 11365
TIME...MOT...LOC 0421Z 186DEG 9KT 3405 11387

Hernandez

The radar

The national radar mosaic for the moment the first event began.

Open the radar archive at this moment

Event by event

12 excessive heat, 5 heat. Local standard time, as filed.

Heat, Central Phoenix

When
September 6, 12:00 AM MST to 11:59 PM MST
Where
Central Phoenix forecast zone
Deaths
1 direct, 0 indirect
Reported by
County Official
Coordinates
33.349, -112.491 (the zone’s center; the record gives no point)

One direct fatality was reported by the Maricopa County Department of Public Health, with their details, such as age, gender and circumstances unavailable.

Heat, Buckeye/Avondale

When
September 6, 12:00 AM MST to 11:59 PM MST
Where
Buckeye/Avondale forecast zone
Deaths
1 direct, 0 indirect
Reported by
County Official
Coordinates
33.349, -112.491 (the zone’s center; the record gives no point)

One direct fatality was reported by the Maricopa County Department of Public Health, with their details, such as age, gender and circumstances unavailable.

Excessive Heat, Central Phoenix

When
September 7, 10:00 AM MST to 8:00 PM MST
Where
Central Phoenix forecast zone
Deaths
1 direct, 0 indirect
Reported by
County Official
Coordinates
33.349, -112.491 (the zone’s center; the record gives no point)

One direct fatality was reported by the Maricopa County Department of Public Health, with their details, such as age, gender and circumstances unavailable.

Excessive Heat, East Valley

When
September 7, 10:00 AM MST to 8:00 PM MST
Where
East Valley forecast zone
Deaths
1 direct, 0 indirect
Reported by
County Official
Coordinates
33.349, -112.491 (the zone’s center; the record gives no point)

One direct fatality was reported by the Maricopa County Department of Public Health, with their details, such as age, gender and circumstances unavailable.

Excessive Heat, Northwest Valley

When
September 7, 10:00 AM MST to 8:00 PM MST
Where
Northwest Valley forecast zone
Reported by
County Official
Coordinates
33.349, -112.491 (the zone’s center; the record gives no point)

Excessive Heat, Buckeye/Avondale

When
September 7, 10:00 AM MST to 8:00 PM MST
Where
Buckeye/Avondale forecast zone
Reported by
County Official
Coordinates
33.349, -112.491 (the zone’s center; the record gives no point)

Excessive Heat, Cave Creek/New River

When
September 7, 10:00 AM MST to 8:00 PM MST
Where
Cave Creek/New River forecast zone
Reported by
County Official
Coordinates
33.349, -112.491 (the zone’s center; the record gives no point)

Excessive Heat, Deer Valley

When
September 7, 10:00 AM MST to 8:00 PM MST
Where
Deer Valley forecast zone
Reported by
County Official
Coordinates
33.349, -112.491 (the zone’s center; the record gives no point)

Excessive Heat, North Phoenix/Glendale

When
September 7, 10:00 AM MST to 8:00 PM MST
Where
North Phoenix/Glendale forecast zone
Reported by
County Official
Coordinates
33.349, -112.491 (the zone’s center; the record gives no point)

Excessive Heat, Scottsdale/Paradise Valley

When
September 7, 10:00 AM MST to 8:00 PM MST
Where
Scottsdale/Paradise Valley forecast zone
Reported by
County Official
Coordinates
33.349, -112.491 (the zone’s center; the record gives no point)

Excessive Heat, Fountain Hills/East Mesa

When
September 7, 10:00 AM MST to 8:00 PM MST
Where
Fountain Hills/East Mesa forecast zone
Reported by
County Official
Coordinates
33.349, -112.491 (the zone’s center; the record gives no point)

Excessive Heat, South Mountain/Ahwatukee

When
September 7, 10:00 AM MST to 8:00 PM MST
Where
South Mountain/Ahwatukee forecast zone
Reported by
County Official
Coordinates
33.349, -112.491 (the zone’s center; the record gives no point)

Excessive Heat, Southeast Valley/Queen Creek

When
September 7, 10:00 AM MST to 8:00 PM MST
Where
Southeast Valley/Queen Creek forecast zone
Reported by
County Official
Coordinates
33.349, -112.491 (the zone’s center; the record gives no point)

Excessive Heat, Aguila Valley

When
September 7, 10:00 AM MST to 8:00 PM MST
Where
Aguila Valley forecast zone
Reported by
County Official
Coordinates
33.349, -112.491 (the zone’s center; the record gives no point)

Heat, Central Phoenix

When
September 8, 5:00 PM MST
Where
Central Phoenix forecast zone
Deaths
1 direct, 0 indirect
Reported by
County Official
Coordinates
33.349, -112.491 (the zone’s center; the record gives no point)

One direct fatality was reported by the Maricopa County Department of Public Health, with their details, such as age, gender and circumstances unavailable.

Heat, Central Phoenix

When
September 9, 5:00 PM MST
Where
Central Phoenix forecast zone
Deaths
1 direct, 0 indirect
Reported by
County Official
Coordinates
33.349, -112.491 (the zone’s center; the record gives no point)

One direct fatality was reported by the Maricopa County Department of Public Health, with their details, such as age, gender and circumstances unavailable.

Heat, North Phoenix/Glendale

When
September 9, 5:00 PM MST
Where
North Phoenix/Glendale forecast zone
Deaths
1 direct, 0 indirect
Reported by
County Official
Coordinates
33.349, -112.491 (the zone’s center; the record gives no point)

One direct fatality was reported by the Maricopa County Department of Public Health, with their details, such as age, gender and circumstances unavailable.

The people who died

As the offices recorded each death: direct deaths were caused by the weather itself, indirect ones by something it set in motion.

EventDateAgeSexWhereKind
Heat, Central Phoenix2019-09-06UnknownDirect
Heat, Buckeye/Avondale2019-09-06UnknownDirect
Excessive Heat, Central Phoenix2019-09-07UnknownDirect
Excessive Heat, East Valley2019-09-07UnknownDirect
Heat, Central Phoenix2019-09-08UnknownDirect
Heat, Central Phoenix2019-09-09UnknownDirect
Heat, North Phoenix/Glendale2019-09-09UnknownDirect

What these are

Heat
Heat below excessive heat criteria that still caused deaths, injuries or significant impacts.
Excessive Heat
Heat at or above the local excessive heat warning criteria, or heat that caused deaths.

After NWS Directive 10-1605, the rules offices file Storm Data by.

The same day elsewhere

More

Every storm in Arizona in 2019Every state in 2019This day in weather historyWarnings in Arizona, September 2019

Sources

NOAA National Centers for Environmental Information, Storm Events Database, compiled from the National Weather Service’s monthly Storm Data. Complete through 2026-06; NCEI adds each month about 75 days after it ends and revises past years a few times a year. Rebuilt 2026-10-01. Each event’s entry at NCEI: 931237, 931238, 931241, 931242, 931243, 931244, 931245, 931246, 931248, 931249, 931250, 931251, 931252, 931253, 931256, 931257, 931258.