Alert archive / Arizona / Flash Flood Warnings in 2024
Flash Flood Warning 20, NWS Flagstaff, AZ
NWS Flagstaff, AZ issued this flash flood warning at Jun 27, 2024, 5:21 PM MDT for Navajo 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 27, 2024, 5:21 PM MDT (23:21 UTC)
- Expired
- Jun 27, 2024, 8:15 PM MDT
- In force
- 3 hr
- Issued by
- NWS Flagstaff, AZ
- Area
- Storm-based polygon
- Damage threat
- Considerable
- Flood severity
- None
County Navajo County, AZ
The radar
The Flagstaff radar (KFSX), 122 km from the middle of the area, began a volume at 23:21 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, 11.4 hours before the alert went out and 136 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.
- Mixed-layer CAPE
- 765 J/kg
- Mixed-layer CIN
- -76 J/kg
- Mixed-layer LCL
- 1295 m above ground
- 0-6 km bulk shear
- 20 kt
- 0-1 km storm-relative helicity
- 10 m²/s²
- 0-3 km storm-relative helicity
- 44 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 1.3
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 27, 3:10 PM MDT, 2 hours 11 minutes earlier.
Area forecast discussion, Jun 27, 3:10 PM MDT, 2 hours 11 minutes before
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</html>In the hours before
Local storm report, Jun 27, 11:24 AM MDT, 5 hours 57 minutes before
Preliminary Local Storm Report
National Weather Service Flagstaff AZ
1024 AM MST Thu Jun 27 2024
..TIME... ...EVENT... ...CITY LOCATION... ...LAT.LON...
..DATE... ....MAG.... ..COUNTY LOCATION..ST.. ...SOURCE....
..REMARKS..
0823 AM Tstm Wnd Gst 1 WSW Winslow 35.02N 110.73W
06/27/2024 M62 MPH Navajo AZ ASOS
Thunderstorm wind gust at Winslow Airport
(ASOS).
&&
BAKSpecial weather statement, Jun 27, 12:01 PM MDT, 5 hours 20 minutes before
Special Weather Statement
National Weather Service Flagstaff AZ
1101 AM MST Thu Jun 27 2024
AZZ013-014-017-040-271845-
Little Colorado River Valley in Navajo County-
Little Colorado River Valley in Apache County-White Mountains-
Northeast Plateaus and Mesas South of Hwy 264-
1101 AM MST Thu Jun 27 2024
...STRONG THUNDERSTORMS WILL IMPACT SOUTHERN APACHE AND NAVAJO
COUNTIES THROUGH 1145 AM MST...
At 1100 AM MST, Doppler radar was tracking strong thunderstorms along
a line extending from near Woodruff to near Lyman Lake State Park.
Movement was northeast at 20 mph.
HAZARD...Wind gusts up to 50 mph and half inch 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...
Concho Lake, Lions Park, Woodruff, Zion Reservoir, Concho, St. Johns,
Saint Johns Industrial Air Park, White Mountain Ultralight
Flightpark, Little Ortega Lake, Hunt, St. Johns City Park, Rainbow
Forest Lodge, Mesa Redonda, Lyman Lake, Cerro Montoso Peak, Mesa
Parada, Petrified Forest National Park, Lyman Lake State Park,
Crystal Forest, and Snowflake.
This includes the following highways...
Interstate 40 between mile markers 300 and 307.
State Route 77 between mile markers 362 and 383.
Highway 180 191 between mile markers 371 and 387.
Highway 60 between mile markers 364 and 375.
Highway 191 161 between mile markers 316 and 329.
Highway 180 between mile markers 312 and 368.
State Route 61 between mile markers 359 and 381.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
If outdoors, consider seeking shelter inside a building.
Torrential rainfall is also occurring with these storms and may lead
to localized flooding. Do not drive your vehicle through flooded
roadways.
&&
LAT...LON 3419 10951 3466 11032 3506 10989 3456 10905
3442 10905
TIME...MOT...LOC 1800Z 230DEG 19KT 3474 11010 3433 10942
MAX HAIL SIZE...0.50 IN
MAX WIND GUST...50 MPH
JJSpecial weather statement, Jun 27, 12:14 PM MDT, 5 hours 7 minutes before
Special Weather Statement
National Weather Service Flagstaff AZ
1114 AM MST Thu Jun 27 2024
AZZ011-271845-
Chuska Mountains and Defiance Plateau-
1114 AM MST Thu Jun 27 2024
...STRONG THUNDERSTORMS WILL IMPACT APACHE COUNTY NEAR FORT DEFIANCE
THROUGH 1145 AM MST...
At 1113 AM MST, Doppler radar was tracking a cluster of strong
thunderstorms over Fort Defiance, or 25 miles northwest of Gallup,
moving east at 30 mph.
HAZARD...Wind gusts up to 50 mph and penny 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...
Piney Hill, Window Rock Airport, St. Michaels, Window Rock, Fort
Defiance, Sawmill, and Hunters Point.
This includes State Route 264 between mile markers 459 and 475.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
If outdoors, consider seeking shelter inside a building.
Torrential rainfall is also occurring with this storm and may lead to
localized flooding. Do not drive your vehicle through flooded
roadways.
&&
LAT...LON 3553 10933 3595 10933 3596 10905 3557 10905
TIME...MOT...LOC 1813Z 269DEG 25KT 3575 10909
MAX HAIL SIZE...0.75 IN
MAX WIND GUST...50 MPH
JJThe office that day
Everything else NWS Flagstaff, AZ issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jun 26, 7:17 PM MDT | Severe Thunderstorm Warning | FGZ | Coconino | 28 min |
| Jun 27, 9:34 AM MDT | Severe Thunderstorm Warning | FGZ | Navajo | 26 min |
| Jun 27, 10:02 AM MDT | Special Weather Statement | FGZ | Navajo | 28 min |
| Jun 27, 10:32 AM MDT | Special Weather Statement | FGZ | Navajo | 28 min |
| Jun 27, 11:01 AM MDT | Special Weather Statement | FGZ | Apache | 44 min |
| Jun 27, 11:18 AM MDT | Areal Flood Advisory | FGZ | Navajo | 117 min |
| Jun 27, 11:47 AM MDT | Severe Thunderstorm Warning | FGZ | Coconino | 43 min |
| Jun 27, 12:01 PM MDT | Special Weather Statement | FGZ | 44 min | |
| Jun 27, 12:14 PM MDT | Special Weather Statement | FGZ | Apache | 31 min |
| Jun 27, 12:32 PM MDT | Severe Thunderstorm Warning | FGZ | Coconino | 43 min |
| Jun 27, 12:41 PM MDT | Areal Flood Advisory | FGZ | Apache | 109 min |
| Jun 27, 1:00 PM MDT | Areal Flood Advisory | FGZ | Apache | 3 hr |
| Jun 27, 1:52 PM MDT | Flash Flood Warning | FGZ | Coconino | 3 hr |
| Jun 27, 2:09 PM MDT | Severe Thunderstorm Warning | FGZ | Coconino | 51 min |
| Jun 27, 2:43 PM MDT | Flash Flood Warning | FGZ | Coconino, Navajo | 3 hr |
| Jun 27, 3:00 PM MDT | Severe Thunderstorm Warning | FGZ | Coconino | 45 min |
| Jun 27, 3:22 PM MDT | Severe Thunderstorm Warning | FGZ | Coconino, Navajo | 23 min |
| Jun 27, 3:46 PM MDT | Flash Flood Warning | FGZ | Coconino | 2 hr |
| Jun 27, 4:12 PM MDT | Flash Flood Warning | FGZ | Coconino | 2 hr |
| Jun 27, 5:04 PM MDT | Severe Thunderstorm Warning | FGZ | Apache, Navajo | 26 min |
Nearby
Flash Flood Warnings in Arizona, 2024Every 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.