Alert archive / Arizona / Flash Flood Warnings in 2024

Flash Flood Warning 91, NWS Flagstaff, AZ

September 7, 2024Yavapai County, Arizona

NWS Flagstaff, AZ issued this flash flood warning at Sep 7, 2024, 3:58 PM MST for Yavapai County, Arizona. It was in force for 3 hr. No storm report in the archive falls inside the area while it was in force.

The area

The counties it named.

The facts

Issued: Sep 7, 2024, 3:58 PM MST (22:58 UTC)
Expired: Sep 7, 2024, 7:00 PM MST
In force: 3 hr
Issued by: NWS Flagstaff, AZ
Area: Storm-based polygon
Damage threat: Considerable
Flood severity: None

County Yavapai County, AZ

The radar

The Flagstaff radar (KFSX), 124 km from the middle of the area, began a volume at 23:01 UTC, the scan nearest the moment this went out.

Open the radar archive at this moment

The archived warnings, watches and discussions in force at that minute are drawn over the scan, this one among them.

What forecasters said that day

The local office's own words before this flash flood warning went out, as it sent them, from the Iowa Environmental Mesonet's archive of National Weather Service text.

NWS Flagstaff, AZ wrote its last area forecast discussion before this flash flood warning went out at Sep 7, 1:35 PM MST, 2 hours 23 minutes earlier.

Area forecast discussion, Sep 7, 1:35 PM MST, 2 hours 23 minutes before

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In the hours before

Local storm report, Sep 7, 12:25 PM MST, 3 hours 33 minutes before

Preliminary Local Storm Report
National Weather Service Flagstaff AZ
1225 PM MST Sat Sep 7 2024

..TIME...   ...EVENT...      ...CITY LOCATION...     ...LAT.LON...
..DATE...   ....MAG....      ..COUNTY LOCATION..ST.. ...SOURCE....
            ..REMARKS..

1152 AM     Hail             2 WSW Downtown Flagstaf 35.19N 111.68W
09/07/2024  M0.70 Inch       Coconino           AZ   Trained Spotter

            Spotter report.

&&

Bak

Special weather statement, Sep 7, 1:18 PM MST, 2 hours 40 minutes before

Special Weather Statement
National Weather Service Flagstaff AZ
118 PM MST Sat Sep 7 2024

AZZ016-018-072045-
Northern Gila County-Eastern Mogollon Rim-
118 PM MST Sat Sep 7 2024

...A STRONG THUNDERSTORM WILL IMPACT HIGHWAY 99 IN SOUTHERN COCONINO
COUNTY AND PORTIONS OF NORTHERN GILA COUNTY THROUGH 145 PM MST...

At 116 PM MST, Doppler radar was tracking a strong thunderstorm near
Bear Canyon Lake, or 11 miles northwest of Forest Lakes, moving west
at 5 mph.

HAZARD...Wind gusts up to 40 mph and nickel size hail.

SOURCE...Radar indicated.

IMPACT...Gusty winds could knock down tree limbs and blow around
         unsecured objects. Minor hail damage to vegetation is
         possible.

Locations impacted include...
Horton Springs, Bear Canyon Lake, and Bear Canyon Lake Recreation
Area.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

If outdoors, consider seeking shelter inside a building.

Torrential rainfall is also occurring with this storm and may lead to
localized flooding. Do not drive your vehicle through flooded
roadways.

&&

LAT...LON 3451 11091 3439 11087 3433 11104 3450 11110
TIME...MOT...LOC 2016Z 077DEG 5KT 3444 11096

MAX HAIL SIZE...0.88 IN
MAX WIND GUST...40 MPH

JJ

Special weather statement, Sep 7, 2:21 PM MST, 1 hour 37 minutes before

Special Weather Statement
National Weather Service Flagstaff AZ
221 PM MST Sat Sep 7 2024

AZZ018-072145-
Northern Gila County-
221 PM MST Sat Sep 7 2024

...STRONG THUNDERSTORMS WILL IMPACT NORTHERN GILA COUNTY THROUGH 245
PM MST...

At 220 PM MST, Doppler radar was tracking strong thunderstorms along
a line extending from Pine to Kohls Ranch. Movement was southwest at
10 mph.

HAZARD...Wind gusts up to 40 mph and penny size hail.

SOURCE...Radar indicated.

IMPACT...Gusty winds could knock down tree limbs and blow around
         unsecured objects. Minor hail damage to vegetation is
         possible.

Locations impacted include...
Horton Springs, Bear Flat, Mountain Meadows, Beaver Valley Estates,
Mesa Del Caballo, Water Wheel Falls, Ellison Creek Estates, Tonto
Village, Geronimo Estates, Freedom Acres, Strawberry, East Verde
Estates, Bonita Creek Estates, Whispering Pines, Star Valley, Flowing
Springs, Christopher Creek, Tonto Natural Bridge State Park, Tonto
Estate, and Ellison Creek Cascades.

This includes the following highways...
 State Route 260 between mile markers 254 and 276.
 State Route 87 between mile markers 254 and 272.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

If outdoors, consider seeking shelter inside a building.

Torrential rainfall is also occurring with these storms and may lead
to localized flooding. Do not drive your vehicle through flooded
roadways.

&&

LAT...LON 3429 11161 3441 11152 3443 11149 3441 11146
      3442 11146 3442 11143 3438 11141 3440 11139
      3441 11141 3442 11140 3439 11115 3437 11114
      3438 11114 3437 11104 3435 11106 3434 11104
      3437 11102 3433 11097 3421 11103
TIME...MOT...LOC 2120Z 022DEG 8KT 3437 11146 3431 11107

MAX HAIL SIZE...0.75 IN
MAX WIND GUST...40 MPH

JJ

Special weather statement, Sep 7, 3:45 PM MST, 13 minutes before

Special Weather Statement
National Weather Service Flagstaff AZ
345 PM MST Sat Sep 7 2024

AZZ008-037-072315-
Yavapai County Valleys and Basins-Yavapai County Mountains-
345 PM MST Sat Sep 7 2024

...A STRONG THUNDERSTORM WILL IMPACT YAVAPAI COUNTY THROUGH 415 PM
MST...

At 343 PM MST, Doppler radar was tracking a strong thunderstorm over
Willow Creek Reservoir, or near Prescott, moving south at 10 mph.

HAZARD...Wind gusts up to 40 mph and half inch hail.

SOURCE...Radar indicated.

IMPACT...Gusty winds could knock down tree limbs and blow around
         unsecured objects. Minor hail damage to vegetation is
         possible.

Locations impacted include...
Thumbe Butte, Rancho Vista Estates, Willow Creek Reservoir, Iron
Springs, Embry-Riddle Aeronautical University, Acker Park, Goldwater
Lake Park, Wildwood Estates, Courthouse Plaza, Goldwater Lake, Lynx
Lake, Potato Patch, Watson Lake, .

This includes the following highways...
 State Route 89 between mile markers 301 and 318.
 State Route 89A near mile marker 318.
 State Route 69 between mile markers 290 and 296.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

If outdoors, consider seeking shelter inside a building.

Torrential rainfall is also occurring with this storm and may lead to
localized flooding. Do not drive your vehicle through flooded
roadways.

&&

LAT...LON 3465 11256 3461 11235 3442 11240 3448 11269
TIME...MOT...LOC 2243Z 016DEG 10KT 3459 11246

MAX HAIL SIZE...0.50 IN
MAX WIND GUST...40 MPH

JJ

The office that day

Everything else NWS Flagstaff, AZ issued on the same UTC day.

Issued	Product	Office	Counties	Lasted
Sep 7, 1:18 PM MST	Special Weather Statement	FGZ		27 min
Sep 7, 2:21 PM MST	Special Weather Statement	FGZ		24 min
Sep 7, 2:33 PM MST	Flash Flood Warning Considerable damage threat	FGZ	Gila	3 hr
Sep 7, 2:48 PM MST	Flash Flood Warning Considerable damage threat	FGZ	Gila	3 hr
Sep 7, 3:45 PM MST	Special Weather Statement	FGZ	Yavapai	30 min
Sep 7, 4:04 PM MST	Special Weather Statement	FGZ	Yavapai	26 min
Sep 7, 4:12 PM MST	Areal Flood Advisory	FGZ	Yavapai	2 hr

Nearby

Flash Flood Warnings in Arizona, 2024 Every flash flood warning in 2024

Sources

The product and its follow-ups from the Iowa Environmental Mesonet's archive of National Weather Service and Storm Prediction Center text; radar from the NEXRAD Level II archive.