Flash Flood Warning 90, NWS Flagstaff, AZ

527 
WGUS75 KFGZ 110625
FFSFGZ

Flash Flood Statement
National Weather Service Flagstaff AZ
1125 PM MST FRI AUG 10 2018

AZC017-110915-
/O.CON.KFGZ.FF.W.0090.000000T0000Z-180811T0915Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Navajo-
1125 PM MST FRI AUG 10 2018

...THE FLASH FLOOD WARNING REMAINS IN EFFECT UNTIL 215 AM MST FOR 
THE SNOWFLAKE AREA OF NAVAJO COUNTY...

At 1112 PM MST, Doppler radar indicated thunderstorms producing 
heavy rain across the warned area.  Flash flooding is expected to 
begin shortly.

* Until 215 AM MST

* At 1110 PM MST, Doppler radar indicated thunderstorms producing 
  heavy rain across the warned area. Over 2 inches of rain has 
  already fallen in Day wash and Cottonwood wash upstream of 
  Snowflake. Flash flooding is expected to begin shortly.

* Some locations that will experience flooding include...
  Snowflake.

This includes the following streams and drainages...Willow Wash...
Cottonwood Wash...Dodson Wash...Canal, The...Day Wash...Silver
Creek...Sevenmile Draw...West Fork Cottonwood Wash...Stinson Wash...
Deer Springs Canyon and Decker Wash.

This includes the following highways...
 State Route 277 between mile markers 318 and 328, and between mile
markers 335 and 336.
 State Route 260 between mile markers 315 and 320.
 State Route 77 between mile markers 362 and 366.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Be especially cautious at night when it is harder to recognize the
dangers of flooding.

&&

LAT...LON 3451 11032 3448 11015 3453 11008 3463 11009
      3466 11007 3461 11006 3453 11007 3446 11012
      3443 11032 3428 11039 3427 11047 3444 11042

$$

JDS

654 
WGUS75 KFGZ 110906
FFSFGZ

Flash Flood Statement
National Weather Service Flagstaff AZ
206 AM MST SAT AUG 11 2018

AZC017-110915-
/O.EXP.KFGZ.FF.W.0090.000000T0000Z-180811T0915Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Navajo-
206 AM MST SAT AUG 11 2018

...THE FLASH FLOOD WARNING FOR THE SNOWFLAKE AREA OF  
NAVAJO COUNTY WILL EXPIRE AT 215 AM
MST...

The heavy rain has ended. Flooding is no longer expected to pose a
threat. Please continue to heed any remaining road closures.

LAT...LON 3451 11032 3448 11015 3453 11008 3463 11009
      3466 11007 3461 11006 3453 11007 3446 11012
      3443 11032 3428 11039 3427 11047 3444 11042

$$

JDS

Area Forecast Discussion
National Weather Service Flagstaff AZ
949 PM MST Fri Aug 10 2018

.SYNOPSIS...Deep moisture will persist over central and southern
Arizona, bringing afternoon and evening showers and thunderstorms
to much of the area. Areas along and south of the Mogollon Rim
will see the most activity through the weekend. Some storms will
produce heavy rainfall, hail, and strong winds.

&&

.DISCUSSION...Trends over the last hour are toward more isolated
showers across northern Arizona, with the exception of northern
Gila county which is remaining quite active. It was another
afternoon and evening of storms producing large and severe hail.

&&

.PREV DISCUSSION /328 PM MST/...The overall pattern remains
relatively unchanged over the weekend with storms favoring the
Rim southward through the afternoon with storms moving to the
southwest. This will depend on nighttime convection and how much
lingering morning cloud cover exists. Temperatures will remain
near average for this time of year, except for some of the
northern valleys such as near Winslow and Page that are quite warm
due to the lack of shower activity.

It looks like early next week will see a thinning of moisture
resulting in less storm coverage, but moisture will increase
again by the middle of the week as a deeper southerly flow
develops.

&&

.AVIATION...For the 06Z package...VFR conditions will continue
across most of northern Arizona for the next 24 hrs. Expect
isolated to scattered showers and thunderstorms to develop 19Z-
04Z, mostly over higher terrain, and to move off to the west to
southwest. Winds will be generally light at 5-10 kts with
afternoon gusts 10-20 kts. Stronger winds and hail possible near
any storms. Aviation discussion not updated for TAF amendments.

&&

.FIRE WEATHER...Deep moisture will remain in place along and south
of the Mogollon Rim and White Mountains. Expect scattered to
numerous showers and thunderstorms in these areas through the
weekend, with scattered storms mainly over the higher terrain
north of the Mogollon Rim to the Utah boarder. Strong outflow
winds, heavy rainfall, hail, and frequent lightning are the
primary hazards.

Monday through Wednesday...Expect scattered afternoon and evening
thunderstorms through the period, with the best chances for
storms continuing to be over the higher terrain and along and
south of the Mogollon Rim and White Mountains.

&&

.FGZ WATCHES/WARNINGS/ADVISORIES...NONE.

&&

PUBLIC...KD/MCT
AVIATION...DB
FIRE WEATHER...DB

For Northern Arizona weather information visit
weather.gov/flagstaff

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE FLAGSTAFF AZ
549 PM MST FRI AUG 10 2018

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

0720 PM     TSTM WND DMG     PINETOP-LAKESIDE        34.13N 109.94W
08/09/2018                   NAVAJO             AZ   TRAINED SPOTTER

            8" DIAMETER FRUIT TREE WAS SNAPPED IN HALF
            DUE TO GUSTY WINDS ASSOCIATED WITH THE
            OUTFLOW OF A THUNDERSTORM IN THE VICINITY OF
            PINETOP-LAKESIDE.

&&

NL

Special Weather Statement
National Weather Service Flagstaff AZ
629 PM MST FRI AUG 10 2018

AZZ007-015-110200-
Coconino Plateau-Western Mogollon Rim-
629 PM MST FRI AUG 10 2018

...SIGNIFICANT WEATHER ADVISORY FOR COCONINO COUNTY UNTIL 700 PM
MST...

At 629 PM MST, Doppler radar was tracking a strong thunderstorm over
Valle, or 30 miles southwest of Desert View at Grand Canyon, moving
southwest at 5 mph.

Nickel size hail and winds in excess of 40 mph will be possible with
this storm.

Locations impacted include...
Valle.

This storm may intensify, so be certain to monitor local radio
stations and available television stations for additional information
and possible warnings from the National Weather Service.

LAT...LON 3580 11209 3566 11198 3552 11214 3572 11231
TIME...MOT...LOC 0129Z 046DEG 6KT 3568 11212

KD

Special Weather Statement
National Weather Service Flagstaff AZ
641 PM MST FRI AUG 10 2018

AZZ008-018-037-110230-
Yavapai County Valleys and Basins-Northern Gila County-Yavapai County
Mountains-
641 PM MST FRI AUG 10 2018

...SIGNIFICANT WEATHER ADVISORY FOR GILA AND YAVAPAI COUNTIES UNTIL
730 PM MST...

At 640 PM MST, Doppler radar was tracking a strong thunderstorm 7
miles south of Pine, or 10 miles west of Payson, moving southwest at
10 mph.

Nickel size hail and winds in excess of 40 mph will be possible with
this storm.

Locations impacted include...
Tonto Natural Bridge State Park.

This storm may intensify, so be certain to monitor local radio
stations and available television stations for additional information
and possible warnings from the National Weather Service.

LAT...LON 3440 11151 3427 11136 3412 11149 3431 11174
TIME...MOT...LOC 0140Z 046DEG 10KT 3429 11151

KD

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE FLAGSTAFF AZ
903 PM MST FRI AUG 10 2018

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

0731 PM     HAIL             SELIGMAN                35.33N 112.88W
08/10/2018  E0.88 INCH       YAVAPAI            AZ   PUBLIC

0730 PM     HAIL             3 W SELIGMAN            35.34N 112.93W
08/10/2018  E1.75 INCH       YAVAPAI            AZ   TRAINED SPOTTER

0720 PM     HAIL             2 WNW SELIGMAN          35.33N 112.91W
08/10/2018  E0.75 INCH       YAVAPAI            AZ   TRAINED SPOTTER

&&

Special Weather Statement
National Weather Service Flagstaff AZ
1032 PM MST FRI AUG 10 2018

AZZ008-037-110600-
Yavapai County Valleys and Basins-Yavapai County  Mountains-
1032 PM MST FRI AUG 10 2018

...SIGNIFICANT WEATHER ADVISORY FOR YAVAPAI COUNTY UNTIL 1100 PM
MST...

At 1032 PM MST, Doppler radar was tracking a strong thunderstorm 8
miles northeast of Horseshoe Reservoir, or 11 miles northwest of
Sycamore Creek, moving southwest at 10 mph.

Nickel size hail and wind gusts up to 50 mph will be possible with
this storm.

Locations impacted include...
Horseshoe Reservoir.

This storm may intensify, so be certain to monitor local radio
stations and available television stations for additional information
and possible warnings from the National Weather Service.

LAT...LON 3400 11174 3413 11175 3414 11155 3400 11150
TIME...MOT...LOC 0532Z 063DEG 8KT 3407 11160

KD