Alert archive / Arizona / Flash Flood Warnings in 2024

Flash Flood Warning 7, NWS Flagstaff, AZ

June 24, 2024Coconino County, Gila County, Arizona

NWS Flagstaff, AZ issued this flash flood warning at Jun 24, 2024, 1:50 PM MST for Coconino County, Gila 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: Jun 24, 2024, 1:50 PM MST (20:50 UTC)
Expired: Jun 24, 2024, 5:00 PM MST
In force: 3 hr
Issued by: NWS Flagstaff, AZ
Area: Storm-based polygon
Damage threat: Considerable
Flood severity: None

Counties Coconino County, AZ, Gila County, AZ

The radar

The Flagstaff radar (KFSX), 29 km from the middle of the area, began a volume at 20:51 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

Flgstf/Belemont, AZ (KFGZ), launched 12:00Z, 8.8 hours before the alert went out and 65 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: 103 J/kg
Mixed-layer CIN: -136 J/kg
Mixed-layer LCL: 1606 m above ground
0-6 km bulk shear: 16 kt
0-1 km storm-relative helicity: 42 m²/s²
0-3 km storm-relative helicity: 32 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 Jun 24, 10:35 AM MST, 3 hours 15 minutes earlier.

Area forecast discussion, Jun 24, 10:35 AM MST, 3 hours 15 minutes before

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In the hours before

Special weather statement, Jun 24, 11:17 AM MST, 2 hours 33 minutes before

Special Weather Statement
National Weather Service Flagstaff AZ
1117 AM MST Mon Jun 24 2024

AZZ008-037-241845-
Yavapai County Valleys and Basins-Yavapai County Mountains-
1117 AM MST Mon Jun 24 2024

...A STRONG THUNDERSTORM WILL IMPACT YAVAPAI COUNTY NEAR
PRESCOTT THROUGH 1145 AM MST...

At 1116 AM MST, Doppler radar was tracking a strong thunderstorm over
Prescott Gateway Mall, or near Prescott, moving east at 5 mph.

HAZARD...Wind gusts up to 40 mph and pea size hail.

SOURCE...Radar indicated.

IMPACT...Gusty winds could knock down tree limbs and blow around
         unsecured objects. Minor hail damage to vegetation is
         possible.

Locations impacted include...
Prescott Valley, Prescott, Glassford Hill, Thumbe Butte, Antelope
Park, Rancho Vista Estates, Prescott Airport, Willow Creek
Reservoir, Granite Creek Park, Prescott Gateway Mall, Prescott Mall,
Wildwood Estates, Fain Lake, Lynx Lake, Goldwater Lake, Watson Lake,
Groom Creek Subdivision, and Groom Creek.

This includes the following highways...
 State Route 89 between mile markers 307 and 321.
 State Route 89A between mile markers 318 and 325.
 State Route 69 between mile markers 277 and 279, and between mile
markers 285 and 296.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

If outdoors, consider seeking shelter inside a building.

&&

LAT...LON 3446 11249 3460 11254 3472 11233 3447 11223
TIME...MOT...LOC 1816Z 249DEG 6KT 3454 11243

MAX HAIL SIZE...0.25 IN
MAX WIND GUST...40 MPH

MCT

The office that day

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

Issued	Product	Office	Counties	Lasted
Jun 23, 8:40 PM MST	Flash Flood Warning Considerable damage threat	FGZ	Yavapai	3 hr
Jun 24, 11:17 AM MST	Special Weather Statement	FGZ	Yavapai	28 min
Jun 24, 2:22 PM MST	Special Weather Statement	FGZ		23 min
Jun 24, 2:29 PM MST	Special Weather Statement	FGZ	Gila	31 min
Jun 24, 3:04 PM MST	Flash Flood Warning Considerable damage threat	FGZ	Gila	3 hr
Jun 24, 3:14 PM MST	Special Weather Statement	FGZ	Yavapai	31 min
Jun 24, 3:19 PM MST	Special Weather Statement	FGZ	Yavapai	26 min
Jun 24, 4:16 PM MST	Areal Flood Advisory	FGZ	Yavapai	3 hr
Jun 24, 4:30 PM MST	Special Weather Statement	FGZ		30 min

Nearby

Flash Flood Warnings in Arizona, 2024 Every flash flood warning in 2024

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.