Alert archive / Arizona / Flash Flood Warnings in 2022

Flash Flood Warning 325, NWS Flagstaff, AZ

September 13, 2022Coconino County, Arizona

NWS Flagstaff, AZ issued this flash flood warning at Sep 13, 2022, 2:50 PM MST for Coconino County, Arizona. It was in force for 4 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: Sep 13, 2022, 2:50 PM MST (21:50 UTC)
Expired: Sep 13, 2022, 6:45 PM MST
In force: 4 hr
Issued by: NWS Flagstaff, AZ
Area: Storm-based polygon
Damage threat: Considerable
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 21:53 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 nearest sounding before it

Las Vegas, NV (KVEF), launched 12:00Z, 9.8 hours before the alert went out and 344 km from the middle of its area. This is the routine balloon launch nearest before it, the air the forecaster had in hand, not a measurement taken for the alert.

Skew-T log-p

Temperature in red, dew point in green, the mixed-layer parcel dashed.

Hodograph

The wind turning with height, colored by layer: ground to 1 km, 1 to 3 km, 3 to 6 km, 6 to 10 km.

Mixed-layer CAPE: 418 J/kg
Mixed-layer CIN: -59 J/kg
Mixed-layer LCL: 1703 m above ground
0-6 km bulk shear: 17 kt
0-1 km storm-relative helicity: 5 m²/s²
0-3 km storm-relative helicity: 15 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

Open this sounding in Storm Lab

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 Sep 13, 2:07 PM MST, 43 minutes earlier.

Area forecast discussion, Sep 13, 2:07 PM MST, 43 minutes before

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In the hours before

Special weather statement, Sep 13, 11:57 AM MST, 2 hours 53 minutes before

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Local storm report, Sep 13, 12:13 PM MST, 2 hours 37 minutes before

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Special weather statement, Sep 13, 12:24 PM MST, 2 hours 26 minutes before

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Local storm report, Sep 13, 12:38 PM MST, 2 hours 12 minutes before

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Special weather statement, Sep 13, 1:49 PM MST, 1 hour 1 minute before

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Local storm report, Sep 13, 2:12 PM MST, 38 minutes 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
Sep 12, 5:47 PM MST	Flash Flood Warning Considerable damage threat	FGZ	Coconino, Yavapai	3 hr
Sep 12, 11:42 PM MST	Severe Thunderstorm Warning	FGZ	Coconino, Gila, Yavapai	48 min
Sep 13, 1:31 AM MST	Special Weather Statement	FGZ		29 min
Sep 13, 9:53 AM MST	Special Weather Statement	FGZ	Yavapai	37 min
Sep 13, 10:27 AM MST	Severe Thunderstorm Warning	FGZ	Yavapai	33 min
Sep 13, 11:06 AM MST	Areal Flood Advisory	FGZ	Yavapai	4 hr
Sep 13, 11:14 AM MST	Special Weather Statement	FGZ	Navajo	31 min
Sep 13, 11:36 AM MST	Severe Thunderstorm Warning	FGZ	Navajo	24 min
Sep 13, 11:57 AM MST	Special Weather Statement	FGZ		33 min
Sep 13, 12:24 PM MST	Special Weather Statement	FGZ	Yavapai	36 min
Sep 13, 1:02 PM MST	Severe Thunderstorm Warning	FGZ	Navajo	28 min
Sep 13, 1:49 PM MST	Special Weather Statement	FGZ		26 min
Sep 13, 1:55 PM MST	Severe Thunderstorm Warning	FGZ	Coconino	35 min
Sep 13, 2:19 PM MST	Flash Flood Warning Considerable damage threat	FGZ	Coconino	3 hr
Sep 13, 3:19 PM MST	Flash Flood Warning Considerable damage threat	FGZ	Yavapai	3 hr

Nearby

Flash Flood Warnings in Arizona, 2022 Every flash flood warning in 2022

Sources

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.