Alert archive / Arizona / Flash Flood Warnings in 2021
Flash Flood Warning 35, NWS Flagstaff, AZ
NWS Flagstaff, AZ issued this flash flood warning at Jul 15, 2021, 8:21 PM MST for Yavapai County, Arizona. It was in force for 114 min. No storm report in the archive falls inside the area while it was in force.
The area
The outline as issued.
The facts
- Issued
- Jul 15, 2021, 8:21 PM MST (03:21 UTC)
- Expired
- Jul 15, 2021, 10:15 PM MST
- In force
- 114 min
- Issued by
- NWS Flagstaff, AZ
- Area
- Storm-based polygon
- Damage threat
- Considerable
- Flood severity
- None
County Yavapai County, AZ
The radar
The Flagstaff radar (KFSX), 115 km from the middle of the area, began a volume at 03:23 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 00:00Z, 3.4 hours before the alert went out and 96 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
- 359 J/kg
- Mixed-layer CIN
- -39 J/kg
- Mixed-layer LCL
- 1057 m above ground
- 0-6 km bulk shear
- 20 kt
- 0-1 km storm-relative helicity
- 186 m²/s²
- 0-3 km storm-relative helicity
- 277 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted.
242
WGUS55 KFGZ 160321
FFWFGZ
AZC025-160515-
/O.NEW.KFGZ.FF.W.0035.210716T0321Z-210716T0515Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
BULLETIN - EAS ACTIVATION REQUESTED
Flash Flood Warning
National Weather Service Flagstaff AZ
821 PM MST Thu Jul 15 2021
The National Weather Service in Flagstaff has issued a
* Flash Flood Warning for...
The Granite Creek basin in...
Yavapai County in west central Arizona...
* Until 1015 PM MST.
* At 818 PM MST, stream gauge reports indicated a 2 foot rise along
Granite Creek. Flash flooding is ongoing and will continue along
Granite Creek to where it reaches Watson Lake.
HAZARD...Life-threatening flash flooding. Thunderstorms
producing flash flooding in and around the Granite
Creek basin.
SOURCE...Gauges reported.
IMPACT...Life threatening flash flooding of areas in and around
the Granite Creek basin.
* Some locations that will experience flash flooding include...
Prescott, Downtown Prescott and White Spar Campground.
This includes the following highways...
State Route 89 between mile markers 308 and 311...and
between mile markers 314 and 315.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
Get out of Granite Creek! Flash flooding is imminent or occurring.
Be especially cautious at night when it is harder to recognize the
dangers of flooding.
&&
LAT...LON 3458 11242 3456 11244 3455 11246 3453 11247
3450 11247 3450 11249 3454 11248 3456 11247
3456 11245 3457 11244 3459 11243
FLASH FLOOD...GAUGE INDICATED
FLASH FLOOD DAMAGE THREAT...CONSIDERABLE
$$
MCT2 follow-up statements
638
WGUS75 KFGZ 160427
FFSFGZ
Flash Flood Statement
National Weather Service Flagstaff AZ
927 PM MST Thu Jul 15 2021
AZC025-160515-
/O.CON.KFGZ.FF.W.0035.000000T0000Z-210716T0515Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Yavapai AZ-
927 PM MST Thu Jul 15 2021
...FLASH FLOOD WARNING FOR THE GRANITE CREEK BASIN REMAINS IN EFFECT
UNTIL 1015 PM MST THIS EVENING FOR YAVAPAI COUNTY...
At 925 PM MST, gauge reports indicated that water levels were
beginning to recede on Granite Creek in Prescott. Additional
rainfall amounts of 0.1 to 0.25 inches are possible in the warned
area. Elevated water along Granite Creek will continue to impact
areas from Prescott downstream to Watson Lake.
HAZARD...Life-threatening flash flooding. Heavy rain producing
flash flooding in and around the Granite Creek basin.
SOURCE...Gauges reported.
IMPACT...Life threatening flash flooding of areas in and around
the Granite Creek basin.
Some locations that will experience flash flooding include...
Prescott, Downtown Prescott and White Spar Campground.
This includes the following highways...
State Route 89 between mile markers 308 and 311...and
between mile markers 314 and 315.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
Get out of Granite Creek! Flash flooding is imminent or occurring.
Be especially cautious at night when it is harder to recognize the
dangers of flooding.
&&
LAT...LON 3458 11242 3456 11244 3455 11246 3453 11247
3450 11247 3450 11249 3454 11248 3456 11247
3456 11245 3457 11244 3459 11243
FLASH FLOOD...GAUGE INDICATED
FLASH FLOOD DAMAGE THREAT...CONSIDERABLE
$$
MCT868
WGUS75 KFGZ 160508
FFSFGZ
Flash Flood Statement
National Weather Service Flagstaff AZ
1008 PM MST Thu Jul 15 2021
AZC025-160518-
/O.EXP.KFGZ.FF.W.0035.000000T0000Z-210716T0515Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Yavapai AZ-
1008 PM MST Thu Jul 15 2021
...FLASH FLOOD WARNING FOR THE GRANITE CREEK BASIN WILL EXPIRE AT
1015 PM MST THIS EVENING FOR YAVAPAI COUNTY...
Flood waters have receded, although elevated water levels will
continue on Granite Creek this evening. Flooding is no longer
expected to pose a threat. Please continue to heed remaining road
closures and use caution near elevated water.
LAT...LON 3458 11242 3456 11244 3455 11246 3453 11247
3450 11247 3450 11249 3454 11248 3456 11247
3456 11245 3457 11244 3459 11243
$$
MCTThe office that day
Everything else NWS Flagstaff, AZ issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jul 15, 5:20 PM MST | Areal Flood Advisory | FGZ | Yavapai | 115 min |
| Jul 15, 6:33 PM MST | Severe Thunderstorm Warning | FGZ | Yavapai | 27 min |
| Jul 15, 6:55 PM MST | Areal Flood Advisory | FGZ | Yavapai | 3 hr |
| Jul 16, 11:56 AM MST | Flash Flood Warning | FGZ | Coconino | 3 hr |
| Jul 16, 12:03 PM MST | Areal Flood Advisory | FGZ | Yavapai | 2 hr |
| Jul 16, 12:36 PM MST | Areal Flood Advisory | FGZ | Coconino | 2 hr |
| Jul 16, 12:52 PM MST | Special Weather Statement | FGZ | 23 min | |
| Jul 16, 1:16 PM MST | Severe Thunderstorm Warning | FGZ | Coconino | 29 min |
| Jul 16, 1:20 PM MST | Flash Flood Warning | FGZ | Coconino | 115 min |
| Jul 16, 1:24 PM MST | Severe Thunderstorm Warning | FGZ | Gila, Navajo | 51 min |
| Jul 16, 1:44 PM MST | Special Weather Statement | FGZ | 46 min | |
| Jul 16, 2:13 PM MST | Severe Thunderstorm Warning | FGZ | Gila, Navajo | 32 min |
| Jul 16, 2:25 PM MST | Areal Flood Advisory | FGZ | Coconino | 3 hr |
| Jul 16, 2:59 PM MST | Flash Flood Warning | FGZ | Coconino | 61 min |
| Jul 16, 3:14 PM MST | Special Weather Statement | FGZ | 31 min | |
| Jul 16, 3:43 PM MST | Severe Thunderstorm Warning | FGZ | Coconino, Yavapai | 32 min |
| Jul 16, 4:18 PM MST | Severe Thunderstorm Warning | FGZ | Yavapai | 12 min |
| Jul 16, 4:34 PM MST | Severe Thunderstorm Warning | FGZ | Gila | 41 min |
| Jul 16, 4:41 PM MST | Flash Flood Warning | FGZ | Gila | 3 hr |
| Jul 16, 4:48 PM MST | Severe Thunderstorm Warning | FGZ | Coconino, Gila | 20 min |
| Jul 16, 4:59 PM MST | Severe Thunderstorm Warning | FGZ | Gila, Yavapai | 15 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.