Alert archive / Arizona / Flash Flood Warnings in 2019

Flash Flood Warning 37, NWS Flagstaff, AZ

August 2, 2019Coconino County, Arizona

NWS Flagstaff, AZ issued this flash flood warning at Aug 2, 2019, 7:09 PM MST for Coconino 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 2, 2019, 7:09 PM MST (02:09 UTC)
Expired: Aug 2, 2019, 10:15 PM MST
In force: 3 hr
Issued by: NWS Flagstaff, AZ
Area: Storm-based polygon
Flood severity: None

County Coconino County, AZ

The radar

The Flagstaff radar (KFSX), 150 km from the middle of the area, began a volume at 02:12 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 2, 3:13 PM MST, 3 hours 56 minutes earlier.

Area forecast discussion, Aug 2, 3:13 PM MST, 3 hours 56 minutes before

Area Forecast Discussion
National Weather Service Flagstaff AZ
313 PM MST Fri Aug 2 2019

.SYNOPSIS...Monsoonal moisture will remain in place through the
period, with daily chances for showers and thunderstorms.
Temperatures will be warm with light winds outside of
thunderstorms.

&&

.DISCUSSION...Showers and thunderstorms developed across the
northern Arizona this afternoon with scattered hail and heavy
rain. These storms will diminish after dark this evening. The
lower elevations of Yavapai County and Gila County could activity
last well into the night.

Saturday into Sunday...moisture remains over northern Arizona for
a continuation of daily showers and thunderstorms. Temperatures
through the period will warm especially in the lower elevation
valleys.

Models are showing a battle between a deepening trough off the
Pacific Coast and the high pressure to the east of Arizona in the
last half of next week. This gives us the uncertainty in regards
to the amount and location of moisture over northern Arizona. Have
keep daily precipitation chances in through the period.

&&

.AVIATION...For the 00Z package...Scattered showers and
thunderstorms will continue through this evening...and then
diminish. Storms will form again on Saturday after 17Z.  Light sfc
winds through the period, except near thunderstorms and outflow
boundaries. MVFR conditions are possible in the strongest storms.
Storm activity will decrease in coverage and intensity after 03Z
Sat. Aviation discussion not updated for TAF amendments.

&&

.FIRE WEATHER...Daily chances for showers and thunderstorms will
continue through Sunday. Winds will generally be light, expect in
the vicinity of storms.

.Monday through Wednesday...Monsoonal moisture remains in
place with chances for showers and thunderstorms each day.

&&

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

&&

PUBLIC...MAS
AVIATION...MAS
FIRE WEATHER...MAS

For Northern Arizona weather information visit
weather.gov/flagstaff

In the hours before

Special weather statement, Aug 2, 3:57 PM MST, 3 hours 12 minutes before

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Special weather statement, Aug 2, 4:33 PM MST, 2 hours 36 minutes before

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Local storm report, Aug 2, 6:01 PM MST, 1 hour 8 minutes before

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Special weather statement, Aug 2, 6:07 PM MST, 1 hour 2 minutes before

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Special weather statement, Aug 2, 7:02 PM MST, 7 minutes before

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Local storm report, Aug 2, 7:08 PM MST, 1 minute before

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The office that day

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

Issued	Product	Office	Counties	Lasted
Aug 2, 5:25 PM MST	Flash Flood Warning	FGZ	Yavapai	3 hr
Aug 2, 6:07 PM MST	Special Weather Statement	FGZ		38 min
Aug 2, 6:12 PM MST	Flash Flood Warning	FGZ	Yavapai	3 hr
Aug 2, 6:27 PM MST	Severe Thunderstorm Warning	FGZ	Yavapai	37 min
Aug 2, 7:02 PM MST	Special Weather Statement	FGZ	Yavapai	28 min
Aug 3, 12:11 PM MST	Special Weather Statement	FGZ	Apache	49 min
Aug 3, 1:14 PM MST	Special Weather Statement	FGZ		46 min
Aug 3, 1:28 PM MST	Flash Flood Warning	FGZ	Yavapai	3 hr
Aug 3, 1:55 PM MST	Special Weather Statement	FGZ		50 min
Aug 3, 2:14 PM MST	Special Weather Statement	FGZ		46 min
Aug 3, 2:30 PM MST	Severe Thunderstorm Warning	FGZ	Yavapai	45 min
Aug 3, 3:25 PM MST	Severe Thunderstorm Warning	FGZ	Yavapai	35 min
Aug 3, 4:19 PM MST	Flash Flood Warning	FGZ	Gila	3 hr
Aug 3, 4:29 PM MST	Flash Flood Warning	FGZ	Gila	3 hr

Nearby

Flash Flood Warnings in Arizona, 2019 Every flash flood warning in 2019

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.