Alert archive / Arizona / Flash Flood Watches in 2018

Flash Flood Watch 6, NWS Phoenix, AZ

August 24, 2018Gila County, Maricopa County, Pinal County, Arizona

NWS Phoenix, AZ issued this flash flood watch at Aug 24, 2018, 5:45 AM MST for Gila County, Maricopa County, Pinal County, Arizona. It took effect at Aug 24, 2018, 11:00 AM MST. It was in force for 13 hr.

The area

The counties it named.

The facts

Issued: Aug 24, 2018, 5:45 AM MST (12:45 UTC)
In effect from: Aug 24, 2018, 11:00 AM MST
Expired: Aug 25, 2018, 12:00 AM MST
In force: 13 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 12:49 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 (KDMA), launched 12:00Z, 0.8 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.

Skew-T log-p

Temperature in red, dew point in green, the mixed-layer parcel dashed.

Hodograph

The wind turning with height, colored by layer: ground to 1 km, 1 to 3 km, 3 to 6 km, 6 to 10 km.

Mixed-layer CAPE: 419 J/kg
Mixed-layer CIN: -114 J/kg
Mixed-layer LCL: 1379 m above ground
0-6 km bulk shear: 10 kt
0-1 km storm-relative helicity: 26 m²/s²
0-3 km storm-relative helicity: 29 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

Open this sounding in Storm Lab

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 24, 4:17 AM MST, 1 hour 28 minutes earlier.

Area forecast discussion, Aug 24, 4:17 AM MST, 1 hour 28 minutes before

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The office that day

Everything else NWS Phoenix, AZ issued on the same UTC day.

Issued	Product	Office	Counties	Lasted
Aug 23, 5:06 PM MST	Severe Thunderstorm Warning	PSR	Maricopa	39 min
Aug 23, 5:12 PM MST	Special Weather Statement	PSR	Maricopa	33 min
Aug 23, 5:24 PM MST	Special Weather Statement	PSR		51 min
Aug 23, 5:30 PM MST	Special Weather Statement	PSR	Maricopa	45 min
Aug 23, 5:30 PM MST	Severe Thunderstorm Warning	PSR	Maricopa, Pinal	45 min
Aug 23, 5:37 PM MST	Dust Storm Advisory	PSR	Maricopa, Pinal	38 min
Aug 23, 5:37 PM MST	Special Weather Statement	PSR	Gila	38 min
Aug 23, 5:43 PM MST	Severe Thunderstorm Warning	PSR	Maricopa	62 min
Aug 23, 5:49 PM MST	Areal Flood Advisory	PSR	Maricopa, Pinal	3 hr
Aug 23, 5:49 PM MST	Severe Thunderstorm Warning	PSR	Gila, Maricopa	41 min
Aug 23, 6:01 PM MST	Flash Flood Warning	PSR	Maricopa	3 hr
Aug 23, 6:13 PM MST	Special Weather Statement	PSR		47 min
Aug 23, 6:29 PM MST	Flash Flood Warning	PSR	Gila, Maricopa, Pinal	2 hr
Aug 23, 6:49 PM MST	Areal Flood Advisory	PSR	Maricopa	116 min
Aug 23, 6:54 PM MST	Special Weather Statement	PSR		51 min
Aug 23, 7:04 PM MST	Areal Flood Advisory	PSR	Maricopa, Pinal	3 hr
Aug 23, 7:04 PM MST	Special Weather Statement	PSR	Gila	41 min
Aug 23, 7:12 PM MST	Severe Thunderstorm Warning	PSR	Maricopa, Pinal	48 min
Aug 23, 7:42 PM MST	Areal Flood Advisory	PSR	Gila, Maricopa, Pinal	3 hr
Aug 23, 7:57 PM MST	Flash Flood Warning	PSR	Maricopa	84 min
Aug 23, 8:06 PM MST	Special Weather Statement	PSR	Pinal	54 min
Aug 23, 8:12 PM MST	Severe Thunderstorm Warning	PSR	Maricopa, Pinal	48 min
Aug 23, 8:28 PM MST	Flash Flood Warning	PSR	Gila, Maricopa, Pinal	3 hr
Aug 23, 9:35 PM MST	Areal Flood Advisory	PSR	Maricopa, Pinal	3 hr
Aug 23, 9:50 PM MST	Dust Storm Advisory	PSR	Maricopa, Pinal	40 min

Nearby

Flash Flood Watches in Arizona, 2018 Every 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.