Alert archive / Arizona / Flash Flood Watches in 2020
Flash Flood Watch 4, NWS Phoenix, AZ
NWS Phoenix, AZ issued this flash flood watch at Jul 22, 2020, 1:24 PM MST for Gila County, Maricopa County, Pinal County, Arizona. It took effect at Jul 23, 2020, 12:00 PM MST. It was in force for 8 hr.
The area
The counties it named.
The facts
- Issued
- Jul 22, 2020, 1:24 PM MST (20:24 UTC)
- In effect from
- Jul 23, 2020, 12:00 PM MST
- Expired
- Jul 23, 2020, 8:01 PM MST
- In force
- 8 hr
- Issued by
- NWS Phoenix, AZ
- Flood severity
- None
Counties Gila County, AZ, Maricopa County, AZ, Pinal County, AZ
The radar
The Phoenix radar (KIWA), 13 km from the middle of the area, began a volume at 20:26 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, 8.4 hours before the alert went out and 145 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
- 164 J/kg
- Mixed-layer CIN
- -177 J/kg
- Mixed-layer LCL
- 2132 m above ground
- 0-6 km bulk shear
- 8 kt
- 0-1 km storm-relative helicity
- -48 m²/s²
- 0-3 km storm-relative helicity
- -71 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 watch 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 watch went out at Jul 22, 12:33 PM MST, 51 minutes earlier.
Area forecast discussion, Jul 22, 12:33 PM MST, 51 minutes before
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</html>The office that day
Everything else NWS Phoenix, AZ issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jul 21, 7:23 PM MST | Special Weather Statement | PSR | 52 min | |
| Jul 21, 7:49 PM MST | Severe Thunderstorm Warning | PSR | Maricopa, Pinal | 26 min |
| Jul 21, 8:13 PM MST | Special Weather Statement | PSR | Maricopa | 32 min |
| Jul 21, 8:18 PM MST | Dust Storm Advisory | PSR | Maricopa, Pinal | 31 min |
Nearby
Flash Flood Watches in Arizona, 2020Every flash flood watch in 2020
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.