Alert archive / Arizona / Flash Flood Warnings in 2021
Flash Flood Warning 217, NWS Flagstaff, AZ
NWS Flagstaff, AZ issued this flash flood warning at Aug 28, 2021, 6:39 PM MST for Yavapai County, Arizona. It was in force for 111 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
- Aug 28, 2021, 6:39 PM MST (01:39 UTC)
- Expired
- Aug 28, 2021, 8:30 PM MST
- In force
- 111 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), 174 km from the middle of the area, began a volume at 01:42 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, 1.7 hours before the alert went out and 143 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
- 215 J/kg
- Mixed-layer CIN
- -10 J/kg
- Mixed-layer LCL
- 2514 m above ground
- 0-6 km bulk shear
- 6 kt
- 0-1 km storm-relative helicity
- -17 m²/s²
- 0-3 km storm-relative helicity
- -5 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted.
617
WGUS55 KFGZ 290139
FFWFGZ
AZC025-290330-
/O.NEW.KFGZ.FF.W.0217.210829T0139Z-210829T0330Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
BULLETIN - EAS ACTIVATION REQUESTED
Flash Flood Warning
National Weather Service Flagstaff AZ
639 PM MST Sat Aug 28 2021
The National Weather Service in Flagstaff has issued a
* Flash Flood Warning for...
Yavapai County in west central Arizona...
* Until 830 PM MST.
* At 635 PM MST, Doppler radar indicated thunderstorms producing
heavy rain southeast of Bagdad. 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...
Portions of SR96 and SR97 south and southeast of Bagdad.
This includes the following highways...
State Route 97 between mile markers 164 and 166.
State Route 96 between mile markers 2 and 12.
This includes the following streams and drainages...
Santa Maria River, Big Shipp Wash, Bridle Creek, Iron Spring Wash,
Little Sycamore Wash, Cottonwood Creek, Quail Spring Wash and
Little Shipp Wash.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
Turn around, don't drown when encountering flooded roads. Most flood
deaths occur in vehicles.
&&
LAT...LON 3459 11312 3462 11304 3459 11302 3455 11302
3451 11303 3447 11304 3444 11306 3442 11310
3443 11315 3445 11317 3448 11317 3452 11317
3456 11315
FLASH FLOOD...RADAR INDICATED
FLASH FLOOD DAMAGE THREAT...CONSIDERABLE
$$
Peterson1 follow-up statement
810
WGUS75 KFGZ 290327
FFSFGZ
Flash Flood Statement
National Weather Service Flagstaff AZ
827 PM MST Sat Aug 28 2021
AZC025-290337-
/O.EXP.KFGZ.FF.W.0217.000000T0000Z-210829T0330Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Yavapai AZ-
827 PM MST Sat Aug 28 2021
...FLASH FLOOD WARNING WILL EXPIRE AT 830 PM MST THIS EVENING FOR
YAVAPAI COUNTY...
At 825 PM MST, National Weather Service Flagstaff Doppler radar
indicated that rainfall had ended southeast of Bagdad. No reports of
Flash Flooding have been received and the Flash Flood Warning will
be allowed to expire. A 16 inch rise was recorded on Little Sycamore
Wash, so area creeks and streams may still have higher than normal
flow.
Please continue to heed remaining road closures.
LAT...LON 3459 11312 3462 11304 3459 11302 3455 11302
3451 11303 3447 11304 3444 11306 3442 11310
3443 11315 3445 11317 3448 11317 3452 11317
3456 11315
$$
PetersonThe office that day
Everything else NWS Flagstaff, AZ issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Aug 28, 6:15 PM MST | Severe Thunderstorm Warning | FGZ | Yavapai | 45 min |
| Aug 29, 2:25 PM MST | Flash Flood Warning | FGZ | Yavapai | 2 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; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.