Alert archive / Arizona / Flash Flood Warnings in 2021
Flash Flood Warning 108, NWS Flagstaff, AZ
NWS Flagstaff, AZ issued this flash flood warning at Jul 25, 2021, 3:28 PM MST for Coconino County, Arizona. It was in force for 3 hr. 1 report came from inside the area while it was in force.
The area
The outline as issued, with what was reported inside it.
The facts
- Issued
- Jul 25, 2021, 3:28 PM MST (22:28 UTC)
- Expired
- Jul 25, 2021, 6:30 PM MST
- In force
- 3 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), 69 km from the middle of the area, began a volume at 22:31 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 was reported inside it
| Time | Report | Where | Remark |
|---|---|---|---|
| Jul 25, 3:50 PM MST | FLASH FLOOD | 5 Ssw Kachina Village, AZ | ADOT REPORTS ROCKS IN ROADWAY ON SR-89 SOUTHBOUND NEAR NF-237. |
Local storm reports filed while the alert was in force, from inside its polygon or its counties.
The nearest sounding before it
Flgstf/Belemont, AZ (KFGZ), launched 12:00Z, 10.5 hours before the alert went out and 23 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
- 4 J/kg
- Mixed-layer CIN
- -19 J/kg
- Mixed-layer LCL
- 803 m above ground
- 0-6 km bulk shear
- 18 kt
- 0-1 km storm-relative helicity
- -30 m²/s²
- 0-3 km storm-relative helicity
- 25 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted.
989
WGUS55 KFGZ 252228
FFWFGZ
AZC005-260130-
/O.NEW.KFGZ.FF.W.0108.210725T2228Z-210726T0130Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
BULLETIN - EAS ACTIVATION REQUESTED
Flash Flood Warning
National Weather Service Flagstaff AZ
328 PM MST Sun Jul 25 2021
The National Weather Service in Flagstaff has issued a
* Flash Flood Warning for...
Coconino County in north central Arizona...
* Until 630 PM MST.
* At 327 PM MST, Doppler radar indicated thunderstorms producing
heavy rain across Interstate 17 and State Route 89A north of
Sedona. Between 0.75 and 1.5 inches of rain have fallen.
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...
Sterling Fish Hatchery, Pine Flat Campground, Cave Springs
Campground and West Fork Of Oak Creek.
This includes the following swimming holes...
Pumphouse Wash.
This includes the following highways...
State Route 89A between mile markers 385 and 391.
Interstate 17 between mile markers 328 and 331.
This includes the following streams and drainages...
Oak Creek and West Fork Oak Creek.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
Turn around, don't drown when encountering flooded roads. Most flood
deaths occur in vehicles.
Flooding of washes and creeks will occur, some dirt roads will
become muddy and impassable. Paved roads and underpasses could
become flooded as well.
&&
LAT...LON 3506 11168 3502 11164 3498 11173 3502 11181
3505 11176
FLASH FLOOD...RADAR INDICATED
FLASH FLOOD DAMAGE THREAT...CONSIDERABLE
$$
TPS1 follow-up statement
355
WGUS75 KFGZ 260132
FFSFGZ
Flash Flood Statement
National Weather Service Flagstaff AZ
632 PM MST Sun Jul 25 2021
AZC005-260142-
/O.EXP.KFGZ.FF.W.0108.000000T0000Z-210726T0130Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Coconino AZ-
632 PM MST Sun Jul 25 2021
...FLASH FLOOD WARNING HAS EXPIRED FOR COCONINO COUNTY...
The heavy rain has ended north of Munds Park and along Highway 89A.
Flooding is no longer expected to pose a threat. Please continue to
heed remaining road closures.
A Flash Flood Watch remains in effect until 1200 AM MST for portions
of east central Arizona, north central Arizona, northeast Arizona
and west central Arizona.
LAT...LON 3506 11168 3502 11164 3498 11173 3502 11181
3505 11176
$$
McCollumThe office that day
Everything else NWS Flagstaff, AZ issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jul 24, 5:30 PM MST | Severe Thunderstorm Warning | FGZ | Coconino, Navajo | 30 min |
| Jul 24, 7:12 PM MST | Areal Flood Advisory | FGZ | Coconino, Navajo | 3 hr |
| Jul 24, 7:50 PM MST | Areal Flood Advisory | FGZ | Coconino | 3 hr |
| Jul 24, 8:49 PM MST | Areal Flood Advisory | FGZ | Coconino, Yavapai | 3 hr |
| Jul 24, 9:32 PM MST | Areal Flood Advisory | FGZ | Yavapai | 3 hr |
| Jul 24, 10:47 PM MST | Areal Flood Warning | FGZ | Navajo | 6 hr |
| Jul 24, 11:06 PM MST | Areal Flood Advisory | FGZ | Apache, Coconino, Navajo | 12 hr |
| Jul 25, 2:30 AM MST | Areal Flood Advisory | FGZ | Coconino, Navajo | 24 hr |
| Jul 25, 2:51 AM MST | Flash Flood Warning | FGZ | Yavapai | 6 hr |
| Jul 25, 4:58 AM MST | Flash Flood Warning | FGZ | Yavapai | 3 hr |
| Jul 25, 9:15 AM MST | Areal Flood Warning | FGZ | Apache, Coconino, Navajo | 13 hr |
| Jul 25, 11:05 AM MST | Flash Flood Warning | FGZ | Navajo | 11 hr |
| Jul 25, 12:39 PM MST | Flash Flood Warning | FGZ | Coconino, Gila, Yavapai | 3 hr |
| Jul 25, 1:51 PM MST | Flash Flood Warning | FGZ | Coconino | 3 hr |
| Jul 25, 2:27 PM MST | Flash Flood Warning | FGZ | Coconino, Yavapai | 108 min |
| Jul 25, 2:52 PM MST | Flash Flood Warning | FGZ | Yavapai | 3 hr |
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; local storm reports from the same archive; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.