Alert archive / Arizona / Flash Flood Warnings in 2021
Flash Flood Warning 172, NWS Flagstaff, AZ
NWS Flagstaff, AZ issued this flash flood warning at Aug 12, 2021, 5:36 AM MST for Gila 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 12, 2021, 5:36 AM MST (12:36 UTC)
- Expired
- Aug 12, 2021, 8:30 AM MST
- In force
- 3 hr
- Issued by
- NWS Flagstaff, AZ
- Area
- Storm-based polygon
- Damage threat
- Considerable
- Flood severity
- None
County Gila County, AZ
The radar
The Phoenix radar (KIWA), 81 km from the middle of the area, began a volume at 12:40 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 12:00Z, 0.6 hours before the alert went out and 97 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
- 1266 J/kg
- Mixed-layer CIN
- -27 J/kg
- Mixed-layer LCL
- 865 m above ground
- 0-6 km bulk shear
- 9 kt
- 0-1 km storm-relative helicity
- 57 m²/s²
- 0-3 km storm-relative helicity
- 99 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted.
691
WGUS55 KFGZ 121236
FFWFGZ
AZC007-121530-
/O.NEW.KFGZ.FF.W.0172.210812T1236Z-210812T1530Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
BULLETIN - EAS ACTIVATION REQUESTED
Flash Flood Warning
National Weather Service Flagstaff AZ
536 AM MST Thu Aug 12 2021
The National Weather Service in Flagstaff has issued a
* Flash Flood Warning for...
Gila County in east central Arizona...
* Until 830 AM MST.
* At 535 AM MST, Doppler radar indicated thunderstorms producing
heavy rain across the warned area. Between 1 and 2.75 inches of
rain have fallen. 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...
mainly rural areas of Gila County south of Sierra Ancha Wilderness.
This includes the following highways...
State Route 288 between mile markers 273 and 282.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
Turn around, don't drown when encountering flooded roads. Most flood
deaths occur in vehicles.
Be especially cautious at night when it is harder to recognize the
dangers of flooding.
Flooding of washes and creeks will occur, some dirt roads will
become muddy and impassable. Paved roads and underpasses could
become flooded as well.
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.
Get out of washes and creeks if you are camping or hiking! Flooding
is occurring or imminent and will inundate area drainages.
&&
LAT...LON 3379 11112 3384 11111 3382 11095 3375 11090
3372 11096 3373 11096 3375 11098
FLASH FLOOD...RADAR INDICATED
FLASH FLOOD DAMAGE THREAT...CONSIDERABLE
$$
ET3 follow-up statements
820
WGUS75 KFGZ 121249
FFSFGZ
Flash Flood Statement
National Weather Service Flagstaff AZ
549 AM MST Thu Aug 12 2021
AZC007-121530-
/O.CON.KFGZ.FF.W.0172.000000T0000Z-210812T1530Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Gila AZ-
549 AM MST Thu Aug 12 2021
...FLASH FLOOD WARNING REMAINS IN EFFECT UNTIL 830 AM MST THIS
MORNING FOR GILA COUNTY...
At 549 AM MST, Doppler radar indicated thunderstorms producing heavy
rain across the warned area. Between 1 and 2.5 inches of rain have
fallen. 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...
mainly rural areas of Gila County
This includes the following highways...
State Route 288 between mile markers 273 and 282.
This includes the following streams and drainages...
Big Cherry Creek, Workman Creek, Greenback Creek, South Fork
Parker Creek, Parker Creek, Dagger Wash, Oak Creek, Coon Creek,
Salt River, Pocket Creek, Warm Creek, Deer Creek, Connor Wash,
Rose Creek, Salome Creek and Griffin Wash.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
Turn around, don't drown when encountering flooded roads. Most flood
deaths occur in vehicles.
Be especially cautious at night when it is harder to recognize the
dangers of flooding.
Flooding of washes and creeks will occur, some dirt roads will
become muddy and impassable. Paved roads and underpasses could
become flooded as well.
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.
Get out of washes and creeks if you are camping or hiking! Flooding
is occurring or imminent and will inundate area drainages.
&&
LAT...LON 3379 11112 3384 11111 3382 11095 3375 11090
3372 11096 3373 11096 3375 11098
FLASH FLOOD...RADAR INDICATED
FLASH FLOOD DAMAGE THREAT...CONSIDERABLE
$$
ET652
WGUS75 KFGZ 121356
FFSFGZ
Flash Flood Statement
National Weather Service Flagstaff AZ
656 AM MST Thu Aug 12 2021
AZC007-121530-
/O.CON.KFGZ.FF.W.0172.000000T0000Z-210812T1530Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Gila AZ-
656 AM MST Thu Aug 12 2021
...FLASH FLOOD WARNING REMAINS IN EFFECT UNTIL 830 AM MST THIS
MORNING FOR GILA COUNTY...
At 656 AM MST, Doppler radar indicated heavy rain had ended across
the warned area with mainly light to moderate showers ongoing.
Between 1 and 3.0 inches of rain have fallen. 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...
mainly rural areas of Gila County
This includes the following highways...
State Route 288 between mile markers 273 and 282.
This includes the following streams and drainages...
Big Cherry Creek, Workman Creek, Greenback Creek, South Fork
Parker Creek, Parker Creek, Dagger Wash, Oak Creek, Coon Creek,
Salt River, Pocket Creek, Warm Creek, Deer Creek, Connor Wash,
Rose Creek, Salome Creek and Griffin Wash.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
Turn around, don't drown when encountering flooded roads. Most flood
deaths occur in vehicles.
Be especially cautious at night when it is harder to recognize the
dangers of flooding.
Flooding of washes and creeks will occur, some dirt roads will
become muddy and impassable. Paved roads and underpasses could
become flooded as well.
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.
Get out of washes and creeks if you are camping or hiking! Flooding
is occurring or imminent and will inundate area drainages.
&&
LAT...LON 3379 11112 3384 11111 3382 11095 3375 11090
3372 11096 3373 11096 3375 11098
FLASH FLOOD...RADAR INDICATED
FLASH FLOOD DAMAGE THREAT...CONSIDERABLE
$$
ET153
WGUS75 KFGZ 121523
FFSFGZ
Flash Flood Statement
National Weather Service Flagstaff AZ
823 AM MST Thu Aug 12 2021
AZC007-121533-
/O.EXP.KFGZ.FF.W.0172.000000T0000Z-210812T1530Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Gila AZ-
823 AM MST Thu Aug 12 2021
...FLASH FLOOD WARNING WILL EXPIRE AT 830 AM MST THIS MORNING FOR
GILA COUNTY...
At 820 AM MST, National Weather Service Flagstaff doppler radar
indicated that rainfall had ended south of Young. River gages on
Parker Creek showed minor rises of around one foot. Water levels in
this region should continue to decrease for the remainder of this
morning and the Flash Flood Warning will be allowed to expire.
Please continue to heed remaining road closures.
LAT...LON 3379 11112 3384 11111 3382 11095 3375 11090
3372 11096 3373 11096 3375 11098
$$
PetersonThe office that day
Everything else NWS Flagstaff, AZ issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Aug 11, 5:35 PM MST | Flash Flood Warning | FGZ | Navajo | 3 hr |
| Aug 12, 12:34 PM MST | Special Weather Statement | FGZ | Yavapai | 26 min |
| Aug 12, 12:43 PM MST | Special Weather Statement | FGZ | 32 min | |
| Aug 12, 1:08 PM MST | Special Weather Statement | FGZ | 22 min | |
| Aug 12, 1:29 PM MST | Special Weather Statement | FGZ | 31 min | |
| Aug 12, 3:21 PM MST | Special Weather Statement | FGZ | Yavapai | 24 min |
| Aug 12, 3:41 PM MST | Flash Flood Warning | FGZ | Coconino | 6 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.