Alert archive / Arizona / Flash Flood Warnings in 2021
Flash Flood Warning 14, NWS Flagstaff, AZ
NWS Flagstaff, AZ issued this flash flood warning at Jul 9, 2021, 3:59 PM MST for Yavapai 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 9, 2021, 3:59 PM MST (22:59 UTC)
- Expired
- Jul 9, 2021, 7:00 PM MST
- In force
- 3 hr
- 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), 124 km from the middle of the area, began a volume at 22:59 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 9, 4:45 PM MST | FLASH FLOOD | 1 Sw Prescott Courthous, AZ | TWO USGS RIVER GAUGES ON GRANITE CREEK MEASURED A 4 FOOT RISE DUE TO HEAVY RAINFALL WITHIN THE AREA. |
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, 11.0 hours before the alert went out and 90 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
- 115 J/kg
- Mixed-layer CIN
- -284 J/kg
- Mixed-layer LCL
- 2249 m above ground
- 0-6 km bulk shear
- 5 kt
- 0-1 km storm-relative helicity
- 74 m²/s²
- 0-3 km storm-relative helicity
- 130 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted.
584
WGUS55 KFGZ 092259
FFWFGZ
AZC025-100200-
/O.NEW.KFGZ.FF.W.0014.210709T2259Z-210710T0200Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
BULLETIN - EAS ACTIVATION REQUESTED
Flash Flood Warning
National Weather Service Flagstaff AZ
359 PM MST Fri Jul 9 2021
The National Weather Service in Flagstaff has issued a
* Flash Flood Warning for...
Yavapai County in west central Arizona...
* Until 700 PM MST.
* At 357 PM MST, Doppler radar indicated thunderstorms producing
heavy rain from Prescott to Iron Springs to the northwest along
Mint Wash and Williamson Valley Wash. Between 0.75 and 1.75 inches
of rain have fallen. Additional rainfall amounts of 0.5 to 1 inch
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...
Prescott, Prescott Valley, Williamson Valley, Yavapai Campground,
Iron Springs, Prescott Airport, Indian Hill West Prescott,
Downtown Prescott, Prescott Gateway Mall, Oak Knoll Village, White
Spar Campground, Lynx Lake Dam and Prescott Valley Event Center.
This includes the following highways...
State Route 69 between mile markers 288 and 296.
State Route 89 between mile markers 309 and 324.
State Route 89A between mile markers 318 and 322.
This includes the following streams and drainages...
Mud Tank Wash, Bannon Creek, Miller Creek, Dillon Wash, Willow
Creek, Butte Creek, Humphrey Wash, Spence Creek, Strickland Wash,
Horse Wash, Hitt Wash, Lynx Creek, Agua Fria River, Granite Creek,
Iron Springs Wash, Bottleneck Wash, Mint Wash, Butte Wash, Cooper
Wash, Little Chino Valley, Skull Valley Wash and Williamson Valley
Wash.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
Turn around, don't drown when encountering flooded roads. Most flood
deaths occur in vehicles.
&&
LAT...LON 3488 11269 3472 11251 3470 11239 3465 11234
3455 11232 3448 11240 3454 11258 3468 11269
3482 11281
FLASH FLOOD...RADAR INDICATED
FLASH FLOOD DAMAGE THREAT...CONSIDERABLE
$$
JJ1 follow-up statement
053
WGUS75 KFGZ 100156
FFSFGZ
Flash Flood Statement
National Weather Service Flagstaff AZ
656 PM MST Fri Jul 9 2021
AZC025-100206-
/O.EXP.KFGZ.FF.W.0014.000000T0000Z-210710T0200Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Yavapai AZ-
656 PM MST Fri Jul 9 2021
...FLASH FLOOD WARNING WILL EXPIRE AT 7 PM MST THIS EVENING FOR
YAVAPAI COUNTY...
The heavy rain has ended. Minor flooding in portions of the Prescott
area will continue to recede and flooding is no longer expected to
pose a threat.
LAT...LON 3488 11269 3472 11251 3470 11239 3465 11234
3455 11232 3448 11240 3454 11258 3468 11269
3482 11281
$$
JJThe office that day
Everything else NWS Flagstaff, AZ issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jul 8, 5:13 PM MST | Special Weather Statement | FGZ | Yavapai | 32 min |
| Jul 8, 5:28 PM MST | Severe Thunderstorm Warning | FGZ | Yavapai | 19 min |
| Jul 8, 6:25 PM MST | Special Weather Statement | FGZ | Yavapai | 50 min |
| Jul 8, 7:03 PM MST | Flash Flood Warning | FGZ | Yavapai | 3 hr |
| Jul 9, 3:02 PM MST | Severe Thunderstorm Warning | FGZ | Yavapai | 28 min |
| Jul 9, 3:22 PM MST | Severe Thunderstorm Warning | FGZ | Gila | 23 min |
| Jul 9, 3:33 PM MST | Severe Thunderstorm Warning | FGZ | Yavapai | 27 min |
| Jul 9, 3:42 PM MST | Severe Thunderstorm Warning | FGZ | Yavapai | 48 min |
| Jul 9, 3:45 PM MST | Areal Flood Advisory | FGZ | Yavapai | 2 hr |
| Jul 9, 4:26 PM MST | Areal Flood Advisory | FGZ | Yavapai | 2 hr |
| Jul 9, 4:48 PM MST | Severe Thunderstorm Warning | FGZ | Gila | 42 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; local storm reports from the same archive; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.