Alert archive / Arizona / Flash Flood Warnings in 2022

Flash Flood Warning 247, NWS Flagstaff, AZ

August 19, 2022Yavapai County, Arizona

NWS Flagstaff, AZ issued this flash flood warning at Aug 19, 2022, 8:46 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
Aug 19, 2022, 8:46 PM MST (03:46 UTC)
Expired
Aug 19, 2022, 11:45 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 03:45 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 Aug 19, 2:27 PM MST, 6 hours 19 minutes earlier.

Area forecast discussion, Aug 19, 2:27 PM MST, 6 hours 19 minutes before
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In the hours before

Special weather statement, Aug 19, 4:04 PM MST, 4 hours 42 minutes before
Special Weather Statement
National Weather Service Flagstaff AZ
404 PM MST Fri Aug 19 2022

AZZ006-007-192315-
Coconino Plateau-Grand Canyon Country-
404 PM MST Fri Aug 19 2022

...A strong thunderstorm will impact portions of the Colorado River
West of Supai through 415 PM MST...

At 403 PM MST, Doppler radar was tracking a strong thunderstorm 8
miles east of Toroweap Campground, moving southeast at 15 mph.

HAZARD...Winds in excess of 30 mph and pea size hail.

SOURCE...Radar indicated.

IMPACT...Gusty winds could blow around unsecured objects and make
         boating difficult. Minor damage to outdoor objects is
         possible.

Locations impacted include...
Colorado Rive West of Supai.

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. Get to relatively higher ground if you are in
a canyon.

&&

LAT...LON 3624 11300 3623 11298 3624 11294 3626 11292
      3625 11291 3626 11289 3628 11287 3628 11284
      3629 11282 3625 11272 3608 11290 3619 11304
TIME...MOT...LOC 2303Z 300DEG 14KT 3623 11291

MAX HAIL SIZE...0.25 IN
MAX WIND GUST...30 MPH

TM
Special weather statement, Aug 19, 4:34 PM MST, 4 hours 12 minutes before
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Special weather statement, Aug 19, 5:05 PM MST, 3 hours 41 minutes before
Special Weather Statement
National Weather Service Flagstaff AZ
505 PM MST Fri Aug 19 2022

AZZ008-037-200030-
Yavapai County Valleys and Basins-Yavapai County  Mountains-
505 PM MST Fri Aug 19 2022

...A strong thunderstorm will impact portions of southern Yavapai
County along I-40 through 530 PM MST...

At 503 PM MST, Doppler radar was tracking a several strong
thunderstorms near Bumble Bee, or 20 miles north of New River,
moving southeast at 10 to 15 mph.

HAZARD...Winds in excess of 30 mph, pea size hail, and heavy
         rainfall.

SOURCE...Radar indicated.

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

Locations impacted include...
Rock Springs, Bumble Bee and Black Canyon City.

This includes Interstate 17 between mile markers 242 and 258.

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 and reduced visibility. Do not drive your
vehicle through flooded roadways. Practice caution as heavy rain may
be displacing rocks onto the road.

&&

LAT...LON 3426 11222 3428 11200 3418 11186 3401 11177
      3406 11228
TIME...MOT...LOC 0003Z 328DEG 13KT 3418 11206

MAX HAIL SIZE...0.25 IN
MAX WIND GUST...30 MPH

JJM
Special weather statement, Aug 19, 5:26 PM MST, 3 hours 20 minutes before
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Special weather statement, Aug 19, 5:31 PM MST, 3 hours 15 minutes before
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Special weather statement, Aug 19, 6:03 PM MST, 2 hours 43 minutes before
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The office that day

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

IssuedProductOfficeCountiesLasted
Aug 19, 5:05 PM MSTSpecial Weather StatementFGZ25 min
Aug 19, 5:26 PM MSTSpecial Weather StatementFGZYavapai34 min
Aug 19, 5:31 PM MSTSpecial Weather StatementFGZ14 min
Aug 19, 5:44 PM MSTSevere Thunderstorm WarningFGZYavapai34 min
Aug 19, 6:03 PM MSTSpecial Weather StatementFGZYavapai42 min
Aug 19, 6:40 PM MSTAreal Flood AdvisoryFGZYavapai3 hr
Aug 20, 2:57 PM MSTFlash Flood Warning Considerable damage threatFGZCoconino3 hr
Aug 20, 4:12 PM MSTFlash Flood Warning Considerable damage threatFGZCoconino3 hr
Aug 20, 4:28 PM MSTSpecial Weather StatementFGZYavapai32 min

Nearby

Flash Flood Warnings in Arizona, 2022Every flash flood warning in 2022

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.