Alert archive / Arizona / Special Weather Statements in 2017

Special Weather Statement, NWS Flagstaff, AZ

August 3, 2017

NWS Flagstaff, AZ issued this special weather statement at Aug 3, 2017, 2:44 PM MST. It was in force for 16 min. No storm report in the archive falls inside the area while it was in force.

The area

The outline as issued.

The facts

Issued: Aug 3, 2017, 2:44 PM MST (21:44 UTC)
Expired: Aug 3, 2017, 3:00 PM MST
In force: 16 min
Issued by: NWS Flagstaff, AZ

The radar

The Flagstaff radar (KFSX), 188 km from the middle of the area, began a volume at 21:45 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.

The text

As transmitted.

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What forecasters said that day

The local office's own words before this special weather statement 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 special weather statement went out at Aug 3, 9:59 AM MST, 4 hours 45 minutes earlier.

Area forecast discussion, Aug 3, 9:59 AM MST, 4 hours 45 minutes before

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Hazardous weather outlook, Aug 3, 4:07 AM MST, 10 hours 37 minutes before

Hazardous Weather Outlook
National Weather Service Flagstaff AZ
407 AM MST Thu Aug 3 2017

AZZ004>018-037>040-040430-
Kaibab Plateau-Marble and Glen Canyons-Grand Canyon Country-
Coconino Plateau-Yavapai County Mountains-
Northeast Plateaus and Mesas Hwy 264 Northward-Chinle Valley-
Chuska Mountains and Defiance Plateau-
Little Colorado River Valley in Coconino County-
Little Colorado River Valley in Navajo County-
Little Colorado River Valley in Apache County-
Western Mogollon Rim-Eastern Mogollon Rim-White Mountains-
Northern Gila County-Yavapai County Valleys and Basins-
Oak Creek and Sycamore Canyons-Black Mesa Area-
Northeast Plateaus and Mesas South of Hwy 264-
407 AM MST Thu Aug 3 2017

This hazardous weather outlook is for Apache...Coconino...
Northern Gila...Navajo...and Yavapai Counties in Northern
Arizona.

.DAY ONE...Today and Tonight

The most likely initial development will be over the White
Mountains and Mogollon Rim later this morning, with storm motion
to the North and Northeast.

.DAYS TWO THROUGH SEVEN...Friday through Wednesday

Moisture begins to decrease across the area limiting storms to a
more isolated pattern through the weekend and into early next
week.

.SPOTTER INFORMATION STATEMENT...

Weather spotters are encouraged to report significant weather
conditions according to standard operating procedures.

In the hours before

Special weather statement, Aug 3, 12:40 PM MST, 2 hours 4 minutes before

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Special weather statement, Aug 3, 12:54 PM MST, 1 hour 50 minutes before

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Local storm report, Aug 3, 1:01 PM MST, 1 hour 43 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE FLAGSTAFF AZ
101 PM MST THU AUG 3 2017

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

1145 AM     FLASH FLOOD      2 NE PRESCOTT COURTHOUS 34.56N 112.45W
08/03/2017                   YAVAPAI            AZ   MESONET

            USGS GAGE FOR THE GRANITE CREEK AT PRESCOTT
            (GCRA3) SHOWED A 4.42 FT. RISE IN 30 MINUTES
            (FROM 11:15AM TO 11:45AM).

&&

TM

Special weather statement, Aug 3, 1:19 PM MST, 1 hour 25 minutes before

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Special weather statement, Aug 3, 2:21 PM MST, 23 minutes before

Special Weather Statement
National Weather Service Flagstaff AZ
221 PM MST THU AUG 3 2017

AZZ008-037-032200-
Yavapai County Valleys and Basins-Yavapai County  Mountains-
221 PM MST THU AUG 3 2017

...SIGNIFICANT WEATHER ADVISORY FOR YAVAPAI COUNTY UNTIL 300 PM
MST...

At 220 PM MST, Doppler radar was tracking a strong thunderstorm over
Iron Springs, or 10 miles west of Prescott Valley, moving west at 5
mph.

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

Locations impacted include...
Yavapai Campground, Indian Hill West Prescott and Iron Springs.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

LAT...LON 3464 11247 3451 11249 3451 11266 3464 11265
TIME...MOT...LOC 2120Z 102DEG 7KT 3458 11259

KD

Special weather statement, Aug 3, 2:44 PM MST, 0 minutes before

Special Weather Statement
National Weather Service Flagstaff AZ
244 PM MST THU AUG 3 2017

AZZ007-032200-
Coconino Plateau-
244 PM MST THU AUG 3 2017

...SIGNIFICANT WEATHER ADVISORY FOR COCONINO COUNTY UNTIL 300 PM
MST...

At 243 PM MST, Doppler radar was tracking a strong thunderstorm 16
miles east of Rose Well, or 45 miles west of Desert View at Grand
Canyon, moving southwest at 10 mph.

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

This storm will remain over mainly rural areas OF Coconino County.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

Frequent cloud to ground lightning is occurring with this storm.
Lightning can strike 10 miles away from a thunderstorm. Seek a safe
shelter inside a building or vehicle.

&&

LAT...LON 3594 11251 3580 11241 3566 11263 3587 11281
TIME...MOT...LOC 2143Z 066DEG 11KT 3583 11260

KD

The office that day

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

Issued	Product	Office	Counties	Lasted
Aug 3, 11:24 AM MST	Special Weather Statement	FGZ	Yavapai	36 min
Aug 3, 11:29 AM MST	Special Weather Statement	FGZ		46 min
Aug 3, 11:35 AM MST	Areal Flood Advisory	FGZ	Yavapai	3 hr
Aug 3, 11:55 AM MST	Special Weather Statement	FGZ	Yavapai	35 min
Aug 3, 12:40 PM MST	Special Weather Statement	FGZ	Coconino	35 min
Aug 3, 12:54 PM MST	Special Weather Statement	FGZ	Yavapai	36 min
Aug 3, 1:19 PM MST	Special Weather Statement	FGZ	Coconino	26 min
Aug 3, 1:49 PM MST	Areal Flood Advisory	FGZ	Yavapai	3 hr
Aug 3, 2:21 PM MST	Special Weather Statement	FGZ	Yavapai	39 min
Aug 3, 2:51 PM MST	Special Weather Statement	FGZ		24 min
Aug 3, 3:51 PM MST	Severe Thunderstorm Warning	FGZ	Yavapai	24 min
Aug 3, 4:25 PM MST	Flash Flood Warning	FGZ	Yavapai	3 hr
Aug 3, 4:45 PM MST	Special Weather Statement	FGZ	Yavapai	45 min

Nearby

Special Weather Statements in Arizona, 2017 Every special weather statement in 2017

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.