Flash Flood Warning 178, NWS Flagstaff, AZ

Issued

Aug 15, 2021, 8:17 PM MST (03:17 UTC)

Expired

Aug 15, 2021, 11:15 PM MST

In force

3 hr

Issued by

NWS Flagstaff, AZ

Area

Storm-based polygon

Damage threat

Considerable

Flood severity

None

County Coconino County, AZ

The Cedar City radar (KICX), 153 km from the middle of the area, began a volume at 03:21 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.

208 
WGUS55 KFGZ 160317
FFWFGZ
AZC005-160615-
/O.NEW.KFGZ.FF.W.0178.210816T0317Z-210816T0615Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/

BULLETIN - EAS ACTIVATION REQUESTED
Flash Flood Warning
National Weather Service Flagstaff AZ
817 PM MST Sun Aug 15 2021

The National Weather Service in Flagstaff has issued a

* Flash Flood Warning for...
  The Havasu Creek basin in...
  Coconino County in north central Arizona...

* Until 1115 PM MST.

* At 816 PM MST, Doppler radar indicated thunderstorms producing 
  heavy rain over the Havasu Creek basin. Between 0.5 and 1 inch of 
  rain has fallen. Flash flooding is ongoing or expected to begin 
  shortly.

  HAZARD...Life-threatening flash flooding. Thunderstorms
           producing flash flooding in and around the Havasu
           Creek basin.

  SOURCE...Radar.

  IMPACT...Life threatening flash flooding of areas in and around
           the Havasu Creek basin.

* Some locations that will experience flash flooding include...
  Grand Canyon National Park, Hualapai Hilltop, Supai and Havasupai 
  Reservation.

This includes the following swimming holes...
	All swimming holes on Havasu Creek near Supai.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Campers and hikers should hustle to higher ground immediately! Stay 
away from creeks and washes!

Foot bridges will be washed out in Supai Campground. Some campsites 
will be flooded. Campers may be stranded in portions of the 
campground.

&&

LAT...LON 3629 11275 3630 11277 3631 11276 3632 11276
      3631 11273 3627 11269 3611 11258 3610 11263
      3620 11269 3615 11271 3611 11271 3613 11274
      3624 11272 3627 11273 3619 11274 3617 11276
      3624 11277

FLASH FLOOD...RADAR INDICATED
FLASH FLOOD DAMAGE THREAT...CONSIDERABLE

$$

McCollum

875 
WGUS75 KFGZ 160611
FFSFGZ

Flash Flood Statement
National Weather Service Flagstaff AZ
1111 PM MST Sun Aug 15 2021

AZC005-160621-
/O.EXP.KFGZ.FF.W.0178.000000T0000Z-210816T0615Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Coconino AZ-
1111 PM MST Sun Aug 15 2021

...FLASH FLOOD WARNING FOR THE HAVASU CREEK BASIN WILL EXPIRE AT 
1115 PM MST THIS EVENING FOR COCONINO COUNTY...

The heavy rain has ended across the area of Supai. Flooding is no 
longer expected to pose a threat.

LAT...LON 3629 11275 3630 11277 3631 11276 3632 11276
      3631 11273 3627 11269 3611 11258 3610 11263
      3620 11269 3615 11271 3611 11271 3613 11274
      3624 11272 3627 11273 3619 11274 3617 11276
      3624 11277

$$

McCollum

Flash Flood Warnings in Arizona, 2021Every flash flood warning in 2021

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