Alert archive / Arizona / Flash Flood Watches in 2018
Flash Flood Watch 5, NWS Phoenix, AZ
NWS Phoenix, AZ issued this flash flood watch at Aug 16, 2018, 11:03 AM MST for 4 counties in Arizona; Imperial County, Riverside County, San Bernardino County, California. It took effect at Aug 16, 2018, 12:00 PM MST. It was in force for 8 hr.
The area
The counties it named.
The facts
- Issued
- Aug 16, 2018, 11:03 AM MST (18:03 UTC)
- In effect from
- Aug 16, 2018, 12:00 PM MST
- Expired
- Aug 16, 2018, 8:00 PM MST
- In force
- 8 hr
- Issued by
- NWS Phoenix, AZ
- Flood severity
- None
Counties La Paz County, AZ, Maricopa County, AZ, Pinal County, AZ, Yuma County, AZ, Imperial County, CA, Riverside County, CA, San Bernardino County, CA
The radar
The Yuma radar (KYUX), 118 km from the middle of the area, began a volume at 18:03 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
Yuma Prvg Ground, AZ (K1Y7), launched 12:00Z, 6.1 hours before the alert went out and 111 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
- 529 J/kg
- Mixed-layer CIN
- -109 J/kg
- Mixed-layer LCL
- 1434 m above ground
- 0-6 km bulk shear
- 9 kt
- 0-1 km storm-relative helicity
- 5 m²/s²
- 0-3 km storm-relative helicity
- -11 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 Aug 16, 9:52 AM MST, 1 hour 11 minutes earlier.
Area forecast discussion, Aug 16, 9:52 AM MST, 1 hour 11 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 |
|---|---|---|---|---|
| Aug 15, 11:06 PM MST | Special Weather Statement | PSR | La Paz | 39 min |
| Aug 15, 11:15 PM MST | Areal Flood Advisory | PSR | La Paz | 3 hr |
| Aug 15, 11:45 PM MST | Flash Flood Warning | PSR | La Paz | 3 hr |
| Aug 15, 11:51 PM MST | Special Weather Statement | PSR | La Paz | 39 min |
| Aug 16, 12:32 AM MST | Areal Flood Advisory | PSR | La Paz | 3 hr |
| Aug 16, 12:39 AM MST | Special Weather Statement | PSR | La Paz | 51 min |
| Aug 16, 12:58 AM MST | Flash Flood Warning | PSR | La Paz | 3 hr |
| Aug 16, 1:48 AM MST | Special Weather Statement | PSR | 42 min | |
| Aug 16, 2:07 AM MST | Special Weather Statement | PSR | La Paz | 38 min |
| Aug 16, 2:37 AM MST | Flash Flood Warning | PSR | La Paz | 3 hr |
| Aug 16, 12:38 PM MST | Areal Flood Advisory | PSR | La Paz | 3 hr |
| Aug 16, 2:39 PM MST | Areal Flood Advisory | PSR | Maricopa | 3 hr |
| Aug 16, 2:50 PM MST | Areal Flood Advisory | PSR | La Paz, Yuma | 3 hr |
| Aug 16, 3:22 PM MST | Flash Flood Warning | PSR | La Paz, Yuma | 3 hr |
| Aug 16, 3:44 PM MST | Special Weather Statement | PSR | 46 min | |
| Aug 16, 3:52 PM MST | Areal Flood Advisory | PSR | Maricopa | 3 hr |
| Aug 16, 3:57 PM MST | Areal Flood Advisory | PSR | Maricopa | 106 min |
| Aug 16, 4:10 PM MST | Areal Flood Advisory | PSR | Yuma | 3 hr |
| Aug 16, 4:27 PM MST | Special Weather Statement | PSR | Yuma | 48 min |
| Aug 16, 4:30 PM MST | Flash Flood Warning | PSR | Yuma | 3 hr |
| Aug 16, 4:36 PM MST | Flash Flood Warning | PSR | Yuma | 3 hr |
| Aug 16, 4:40 PM MST | Areal Flood Advisory | PSR | La Paz, Yuma | 3 hr |
| Aug 16, 4:44 PM MST | Flash Flood Warning | PSR | Maricopa | 3 hr |
| Aug 16, 12:46 PM MST | Special Weather Statement | PSR | Riverside | 44 min |
| Aug 16, 12:54 PM MST | Flash Flood Warning | PSR | Riverside, San Bernardino | 3 hr |
| Aug 16, 2:24 PM MST | Areal Flood Advisory | PSR | Riverside | 3 hr |
| Aug 16, 3:04 PM MST | Flash Flood Warning | PSR | Riverside | 3 hr |
Nearby
Flash Flood Watches in Arizona, 2018Flash Flood Watches in California, 2018Every flash flood watch in 2018
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.