Alert archive / Arizona / Flash Flood Warnings in 2022
Flash Flood Warning 212, NWS Phoenix, AZ
NWS Phoenix, AZ issued this flash flood warning at Aug 20, 2022, 11:37 AM MST for Pinal 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 counties it named.
The facts
- Issued
- Aug 20, 2022, 11:37 AM MST (18:37 UTC)
- Expired
- Aug 20, 2022, 3:05 PM MST
- In force
- 3 hr
- Issued by
- NWS Phoenix, AZ
- Area
- Storm-based polygon
- Damage threat
- Considerable
- Flood severity
- None
County Pinal County, AZ
The radar
The Phoenix radar (KIWA), 52 km from the middle of the area, began a volume at 18:40 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
Tuscon, AZ (KTUS), launched 12:00Z, 6.6 hours before the alert went out and 92 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
- 639 J/kg
- Mixed-layer CIN
- -2 J/kg
- Mixed-layer LCL
- 630 m above ground
- 0-6 km bulk shear
- 10 kt
- 0-1 km storm-relative helicity
- 34 m²/s²
- 0-3 km storm-relative helicity
- 29 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
What forecasters said that day
The local office's own words before this flash flood warning went out, as it sent them, from the Iowa Environmental Mesonet's archive of National Weather Service text.
NWS Phoenix, AZ wrote its last area forecast discussion before this flash flood warning went out at Aug 20, 11:27 AM MST, 10 minutes earlier.
Area forecast discussion, Aug 20, 11:27 AM MST, 10 minutes before
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</html>In the hours before
Special weather statement, Aug 20, 10:39 AM MST, 58 minutes before
Special Weather Statement
National Weather Service Phoenix AZ
1039 AM MST Sat Aug 20 2022
AZZ553-201830-
Northwest Pinal County AZ-
1039 AM MST Sat Aug 20 2022
...A strong thunderstorm will impact portions of Pinal County through
1130 AM MST...
At 1039 AM MST, Doppler radar was tracking a strong thunderstorm near
Blackwater, or 8 miles northwest of Coolidge. This storm was nearly
stationary.
HAZARD...Winds in excess of 40 mph.
SOURCE...Radar indicated.
IMPACT...Gusty winds could knock down tree limbs and blow around
unsecured objects.
Locations impacted include...
Casa Grande, Coolidge and Blackwater.
This includes the following highways...
AZ Interstate 10 between mile markers 184 and 188.
AZ Route 87 between mile markers 132 and 149.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
If outdoors, consider seeking shelter inside a building.
Torrential rainfall is also occurring with this storm and may lead to
localized flooding. Do not drive your vehicle through flooded
roadways.
Frequent cloud to ground lightning is occurring with this storm.
Lightning can strike 10 miles away from a thunderstorm. Seek a safe
shelter inside a building or vehicle.
&&
LAT...LON 3313 11169 3313 11152 3296 11152 3296 11181
TIME...MOT...LOC 1739Z 006DEG 1KT 3307 11164
MAX HAIL SIZE...0.00 IN
MAX WIND GUST...40 MPH
FeldkircherSpecial weather statement, Aug 20, 11:05 AM MST, 32 minutes before
Special Weather Statement
National Weather Service Phoenix AZ
1105 AM MST Sat Aug 20 2022
AZZ552-555-558-201845-
Apache Junction/Gold Canyon AZ-Superior AZ-
Pinal/Superstition Mountains AZ-
1105 AM MST Sat Aug 20 2022
...A strong thunderstorm will impact portions of Pinal County through
1145 AM MST...
At 1105 AM MST, Doppler radar was tracking a strong thunderstorm over
Kings Ranch, or over Gold Canyon. This storm was nearly stationary.
HAZARD...Winds in excess of 40 mph.
SOURCE...Radar indicated.
IMPACT...Gusty winds could knock down tree limbs and blow around
unsecured objects.
Locations impacted include...
Apache Junction, Gold Canyon, Kings Ranch and Gold Camp.
This includes US Highway 60 between mile markers 198 and 210.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
If outdoors, consider seeking shelter inside a building.
Torrential rainfall is also occurring with this storm and may lead to
localized flooding. Do not drive your vehicle through flooded
roadways.
Frequent cloud to ground lightning is occurring with this storm.
Lightning can strike 10 miles away from a thunderstorm. Seek a safe
shelter inside a building or vehicle.
&&
LAT...LON 3344 11148 3340 11134 3327 11135 3333 11158
TIME...MOT...LOC 1805Z 028DEG 2KT 3339 11143
MAX HAIL SIZE...0.00 IN
MAX WIND GUST...40 MPH
FeldkircherSpecial weather statement, Aug 20, 11:12 AM MST, 25 minutes before
Special Weather Statement
National Weather Service Phoenix AZ
1112 AM MST Sat Aug 20 2022
AZZ553-201900-
Northwest Pinal County AZ-
1112 AM MST Sat Aug 20 2022
...A strong thunderstorm will impact portions of Pinal County through
NOON MST...
At 1112 AM MST, Doppler radar was tracking a strong thunderstorm near
Olberg, or 11 miles south of Sun Lakes. This storm was nearly
stationary.
HAZARD...Winds in excess of 40 mph.
SOURCE...Radar indicated.
IMPACT...Gusty winds could knock down tree limbs and blow around
unsecured objects.
Locations impacted include...
Casa Grande, Maricopa, Olberg, Ak-Chin Village and Sacaton.
This includes the following highways...
AZ Interstate 10 between mile markers 176 and 179.
AZ Route 347 between mile markers 168 and 176.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
If outdoors, consider seeking shelter inside a building.
Torrential rainfall is also occurring with this storm and may lead to
localized flooding. Do not drive your vehicle through flooded
roadways.
Frequent cloud to ground lightning is occurring with this storm.
Lightning can strike 10 miles away from a thunderstorm. Seek a safe
shelter inside a building or vehicle.
&&
LAT...LON 3315 11200 3312 11180 3296 11181 3298 11210
TIME...MOT...LOC 1812Z 348DEG 1KT 3306 11190
MAX HAIL SIZE...0.00 IN
MAX WIND GUST...40 MPH
FeldkircherThe office that day
Everything else NWS Phoenix, AZ issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Aug 19, 5:03 PM MST | Flash Flood Warning | PSR | Maricopa | 2 hr |
| Aug 19, 5:13 PM MST | Flash Flood Warning | PSR | Maricopa | 3 hr |
| Aug 19, 5:13 PM MST | Severe Thunderstorm Warning | PSR | Maricopa | 36 min |
| Aug 19, 5:38 PM MST | Special Weather Statement | PSR | 52 min | |
| Aug 19, 5:40 PM MST | Flash Flood Warning | PSR | Maricopa | 6 hr |
| Aug 19, 6:04 PM MST | Flash Flood Warning | PSR | Maricopa | 5 hr |
| Aug 19, 6:18 PM MST | Flash Flood Warning | PSR | Maricopa | 4 hr |
| Aug 19, 6:25 PM MST | Special Weather Statement | PSR | 50 min | |
| Aug 19, 6:32 PM MST | Flash Flood Warning | PSR | Gila | 6 hr |
| Aug 19, 6:58 PM MST | Severe Thunderstorm Warning | PSR | Yuma | 25 min |
| Aug 19, 7:00 PM MST | Special Weather Statement | PSR | Maricopa | 45 min |
| Aug 19, 7:04 PM MST | Areal Flood Advisory | PSR | Maricopa | 3 hr |
| Aug 19, 7:08 PM MST | Special Weather Statement | PSR | La Paz | 52 min |
| Aug 19, 7:10 PM MST | Areal Flood Advisory | PSR | La Paz, Maricopa | 13 min |
| Aug 19, 7:12 PM MST | Areal Flood Advisory | PSR | Maricopa | 4 hr |
| Aug 19, 7:23 PM MST | Flash Flood Warning | PSR | La Paz, Maricopa | 3 hr |
| Aug 19, 7:25 PM MST | Areal Flood Advisory | PSR | Maricopa | 5 hr |
| Aug 19, 7:25 PM MST | Severe Thunderstorm Warning | PSR | La Paz | 20 min |
| Aug 19, 7:35 PM MST | Special Weather Statement | PSR | 40 min | |
| Aug 19, 7:52 PM MST | Flash Flood Warning | PSR | Maricopa | 4 hr |
| Aug 19, 7:56 PM MST | Dust Storm Advisory | PSR | La Paz, Yuma | 64 min |
| Aug 19, 8:18 PM MST | Flash Flood Warning | PSR | La Paz | 4 hr |
| Aug 19, 8:31 PM MST | Areal Flood Advisory | PSR | La Paz, Maricopa | 11 min |
| Aug 19, 8:42 PM MST | Flash Flood Warning | PSR | La Paz, Maricopa | 8 hr |
| Aug 19, 8:44 PM MST | Areal Flood Advisory | PSR | La Paz, Maricopa | 3 hr |
| Aug 19, 8:48 PM MST | Areal Flood Advisory | PSR | La Paz | 3 hr |
| Aug 19, 8:59 PM MST | Flash Flood Warning | PSR | La Paz, Maricopa | 6 hr |
| Aug 19, 9:18 PM MST | Areal Flood Advisory | PSR | La Paz, Maricopa, Yuma | 3 hr |
| Aug 19, 10:07 PM MST | Areal Flood Advisory | PSR | Yuma | 4 hr |
| Aug 19, 10:08 PM MST | Areal Flood Advisory | PSR | Maricopa, Yuma | 20 min |
| Aug 19, 10:11 PM MST | Dust Storm Advisory | PSR | La Paz, Yuma | 64 min |
| Aug 19, 10:19 PM MST | Severe Thunderstorm Warning | PSR | Yuma | 41 min |
| Aug 19, 10:28 PM MST | Flash Flood Warning | PSR | Maricopa, Yuma | 6 hr |
| Aug 19, 10:44 PM MST | Areal Flood Advisory | PSR | Yuma | 3 hr |
| Aug 19, 10:54 PM MST | Flash Flood Warning | PSR | Yuma | 4 hr |
| Aug 19, 11:48 PM MST | Areal Flood Advisory | PSR | Yuma | 3 hr |
| Aug 20, 12:01 AM MST | Areal Flood Advisory | PSR | Maricopa | 4 hr |
| Aug 20, 12:34 AM MST | Flash Flood Warning | PSR | La Paz, Maricopa, Yuma | 4 hr |
| Aug 20, 12:45 AM MST | Areal Flood Warning | PSR | La Paz | 11 hr |
| Aug 20, 2:05 AM MST | Areal Flood Advisory | PSR | Maricopa | 3 hr |
| Aug 20, 3:06 AM MST | Areal Flood Warning | PSR | La Paz, Maricopa | 9 hr |
| Aug 20, 6:43 AM MST | Areal Flood Warning | PSR | Gila | 6 hr |
| Aug 20, 10:39 AM MST | Special Weather Statement | PSR | Pinal | 51 min |
| Aug 20, 11:05 AM MST | Special Weather Statement | PSR | Pinal | 40 min |
| Aug 20, 11:12 AM MST | Special Weather Statement | PSR | 48 min | |
| Aug 20, 11:56 AM MST | Flash Flood Warning | PSR | Pinal | 3 hr |
| Aug 20, 12:04 PM MST | Flash Flood Warning | PSR | Gila | 3 hr |
| Aug 20, 12:44 PM MST | Special Weather Statement | PSR | Maricopa | 46 min |
| Aug 20, 1:01 PM MST | Flash Flood Warning | PSR | Maricopa, Pinal | 3 hr |
| Aug 20, 1:18 PM MST | Special Weather Statement | PSR | Maricopa | 42 min |
| Aug 20, 1:33 PM MST | Special Weather Statement | PSR | Pinal | 42 min |
| Aug 20, 2:19 PM MST | Flash Flood Warning | PSR | Pinal | 4 hr |
| Aug 20, 2:22 PM MST | Special Weather Statement | PSR | 38 min | |
| Aug 20, 2:30 PM MST | Flash Flood Warning | PSR | Maricopa | 4 hr |
| Aug 20, 3:04 PM MST | Flash Flood Warning | PSR | Maricopa | 3 hr |
| Aug 20, 4:17 PM MST | Flash Flood Warning | PSR | Gila | 3 hr |
| Aug 20, 1:16 PM MST | Special Weather Statement | PSR | Riverside | 44 min |
| Aug 20, 1:40 PM MST | Flash Flood Warning | PSR | Riverside | 2 hr |
| Aug 20, 3:33 PM MST | Special Weather Statement | PSR | Riverside | 42 min |
| Aug 20, 3:44 PM MST | Severe Thunderstorm Warning | PSR | Riverside, San Bernardino | 29 min |
| Aug 20, 4:08 PM MST | Flash Flood Warning | PSR | Riverside, San Bernardino | 115 min |
Nearby
Flash Flood Warnings in Arizona, 2022Every flash flood warning in 2022
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.