Alert archive / Arizona / Flash Flood Warnings in 2021
Flash Flood Warning 145, NWS Flagstaff, AZ
NWS Flagstaff, AZ issued this flash flood warning at Aug 1, 2021, 6:20 PM MST for Gila County, 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 outline as issued.
The facts
- Issued
- Aug 1, 2021, 6:20 PM MST (01:20 UTC)
- Expired
- Aug 1, 2021, 9:15 PM MST
- In force
- 3 hr
- Issued by
- NWS Flagstaff, AZ
- Area
- Storm-based polygon
- Damage threat
- Considerable
- Flood severity
- None
Counties Gila County, AZ, Navajo County, AZ
The radar
The Flagstaff radar (KFSX), 92 km from the middle of the area, began a volume at 01:22 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
Phoenix, AZ (KPSR), launched 00:00Z, 1.3 hours before the alert went out and 146 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
- 748 J/kg
- Mixed-layer CIN
- -58 J/kg
- Mixed-layer LCL
- 2842 m above ground
- 0-6 km bulk shear
- 12 kt
- 0-1 km storm-relative helicity
- -2 m²/s²
- 0-3 km storm-relative helicity
- 6 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted.
396
WGUS55 KFGZ 020120
FFWFGZ
AZC007-017-020415-
/O.NEW.KFGZ.FF.W.0145.210802T0120Z-210802T0415Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
BULLETIN - EAS ACTIVATION REQUESTED
Flash Flood Warning
National Weather Service Flagstaff AZ
620 PM MST Sun Aug 1 2021
The National Weather Service in Flagstaff has issued a
* Flash Flood Warning for...
Gila County in east central Arizona along Cibeque Creek...
Navajo County in north central Arizona near Cibeque...
* Until 915 PM MST.
* At 616 PM MST, Doppler radar indicated thunderstorms producing
heavy rain across the warned area. Between 1.5 and 2.5 inches of
rain have fallen in the area between Cibeque Creek and Salt Creek.
Additional rainfall amounts of 0.25 to 0.75 inches are possible in
the warned area. Flash flooding is ongoing or expected to begin
shortly.
HAZARD...Life-threatening flash flooding. Thunderstorms
producing flash flooding.
SOURCE...Radar.
IMPACT...Life-threatening flash flooding of low-water
crossings, creeks, normally dry washes and roads.
* Some locations that will experience flash flooding include...
Fort Apache Reservation and Cibecue.
This includes the following swimming holes...
Cibeque Falls.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
Turn around, don't drown when encountering flooded roads. Most flood
deaths occur in vehicles.
In hilly or mountainous terrain, there are many low water crossings
which will become dangerous in heavy rain. Do not attempt to cross
flooded roads. Find an alternate route.
Remain alert for flooding even in locations not receiving rain.
Normally dry washes, slot canyons and creeks can become raging
killer currents in a matter of minutes, even from distant rainfall.
Report any flooding to local law enforcement and the NWS Flagstaff
when you can do so safely.
&&
LAT...LON 3400 11061 3404 11064 3416 11051 3405 11045
3404 11045 3398 11046 3390 11046 3385 11053
3384 11054 3385 11056 3386 11055 3390 11048
3396 11048 3396 11058
FLASH FLOOD...RADAR INDICATED
FLASH FLOOD DAMAGE THREAT...CONSIDERABLE
$$
DB1 follow-up statement
961
WGUS75 KFGZ 020411
FFSFGZ
Flash Flood Statement
National Weather Service Flagstaff AZ
911 PM MST Sun Aug 1 2021
AZC007-017-020421-
/O.EXP.KFGZ.FF.W.0145.000000T0000Z-210802T0415Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Gila AZ-Navajo AZ-
911 PM MST Sun Aug 1 2021
...FLASH FLOOD WARNING WILL EXPIRE AT 915 PM MST THIS EVENING FOR
GILA AND NAVAJO COUNTIES...
The heavy rain has ended. Flooding is no longer expected to pose a
threat, but high water will flow in Cibeque Creek overnight. Be
especially cautious at night when it is harder to recognize the
dangers of high water or flooding. Please continue to heed remaining
road closures.
LAT...LON 3400 11061 3404 11064 3416 11051 3405 11045
3404 11045 3398 11046 3390 11046 3385 11053
3384 11054 3385 11056 3386 11055 3390 11048
3396 11048 3396 11058
$$
DBThe office that day
Everything else NWS Flagstaff, AZ issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Aug 1, 5:05 PM MST | Areal Flood Advisory | FGZ | Coconino | 3 hr |
| Aug 1, 5:11 PM MST | Severe Thunderstorm Warning | FGZ | Gila, Navajo | 49 min |
| Aug 1, 5:22 PM MST | Flash Flood Warning | FGZ | Coconino | 3 hr |
| Aug 1, 5:28 PM MST | Flash Flood Warning | FGZ | Gila, Navajo | 5 hr |
| Aug 1, 5:49 PM MST | Areal Flood Advisory | FGZ | Coconino | 3 hr |
| Aug 1, 5:49 PM MST | Flash Flood Warning | FGZ | Apache, Navajo | 3 hr |
| Aug 1, 6:04 PM MST | Flash Flood Warning | FGZ | Coconino | 3 hr |
| Aug 1, 7:55 PM MST | Flash Flood Warning | FGZ | Gila | 2 hr |
| Aug 1, 8:26 PM MST | Flash Flood Warning | FGZ | Gila | 115 min |
| Aug 1, 8:59 PM MST | Flash Flood Warning | FGZ | Gila | 85 min |
| Aug 1, 9:47 PM MST | Special Weather Statement | FGZ | 28 min | |
| Aug 2, 1:59 PM MST | Flash Flood Warning | FGZ | Apache | 3 hr |
| Aug 2, 2:23 PM MST | Severe Thunderstorm Warning | FGZ | Apache, Navajo | 22 min |
| Aug 2, 2:44 PM MST | Severe Thunderstorm Warning | FGZ | Apache, Navajo | 31 min |
| Aug 2, 4:06 PM MST | Special Weather Statement | FGZ | Apache | 39 min |
| Aug 2, 4:14 PM MST | Special Weather Statement | FGZ | 31 min |
Nearby
Flash Flood Warnings in Arizona, 2021Every flash flood warning in 2021
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.