Flash Flood Warning 196, NWS Flagstaff, AZ

Issued

Aug 17, 2021, 5:02 PM MST (00:02 UTC)

Expired

Aug 17, 2021, 8:15 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 Flagstaff radar (KFSX), 146 km from the middle of the area, began a volume at 00:01 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.

907 
WGUS55 KFGZ 180002
FFWFGZ
AZC005-180315-
/O.NEW.KFGZ.FF.W.0196.210818T0002Z-210818T0315Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/

BULLETIN - EAS ACTIVATION REQUESTED
Flash Flood Warning
National Weather Service Flagstaff AZ
502 PM MST Tue Aug 17 2021

The National Weather Service in Flagstaff has issued a

* Flash Flood Warning for...
  Coconino County in north central Arizona...

* Until 815 PM MST.

* At 502 PM MST, Doppler radar and automated rain gauges indicated 
  thunderstorms producing heavy rain across the warned area. Between 
  0.75 and 1.5 inches of rain have fallen. Additional rainfall 
  amounts of 0.75 to 1.5 inches are possible in the warned area. 
  Flash flooding is ongoing or expected to begin shortly.

  HAZARD...Life-threatening flash flooding. Thunderstorms
           producing flash flooding.

  SOURCE...Radar and automated gauges.

  IMPACT...Life-threatening flash flooding of low-water
           crossings, creeks, normally dry washes and roads.

* Some locations that will experience flash flooding include...
  Grand Canyon National Park and Navajo Reservation.

This includes the following highways...
	Highway 180 between mile markers 242 and 253.

This includes the following streams and drainages...
  Coconino Wash, Deer Tank Wash, Lee Canyon, Lava Wash, Red Horse 
  Wash, Little Red Horse Wash, Hance Creek, Miller Wash, Cedar Wash, 
  Campbell Francis Wash and Deadman Wash.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Turn around, don't drown when encountering flooded roads. Most flood 
deaths occur in vehicles.

In hilly or mountainous terrain, there are many low water crossings 
which will become dangerous in heavy rain. Do not attempt to cross 
flooded roads. Find an alternate route.

&&

LAT...LON 3597 11179 3595 11185 3572 11170 3563 11156
      3547 11165 3548 11191 3592 11211 3599 11192

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

$$

TPS

573 
WGUS75 KFGZ 180314
FFSFGZ

Flash Flood Statement
National Weather Service Flagstaff AZ
814 PM MST Tue Aug 17 2021

AZC005-180324-
/O.EXP.KFGZ.FF.W.0196.000000T0000Z-210818T0315Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Coconino AZ-
814 PM MST Tue Aug 17 2021

...FLASH FLOOD WARNING WILL EXPIRE AT 815 PM MST THIS EVENING FOR 
COCONINO COUNTY FROM STATE ROUTE 64 TO HIGHWAY 180...

Extremely heavy rain fell earlier this evening along and just south 
of State Highway 64 east of the Grand Canyon. Runoff will continue 
this evening, but additional flash flooding is not expected. Please 
continue to heed remaining road closures.

A Flash Flood Watch remains in effect until 1100 PM MST for portions 
of north central Arizona, northeast Arizona and west central Arizona.

LAT...LON 3597 11179 3595 11185 3572 11170 3563 11156
      3547 11165 3548 11191 3592 11211 3599 11192

$$

JJ

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.