Alert archive / Arizona / Flash Flood Watches in 2017

Flash Flood Watch 5, NWS Phoenix, AZ

July 23, 2017Gila County, Maricopa County, Pinal County, Arizona

NWS Phoenix, AZ issued this flash flood watch at Jul 23, 2017, 10:36 AM MST for Gila County, Maricopa County, Pinal County, Arizona. It took effect at Jul 23, 2017, 12:00 PM MST. It was in force for 12 hr.

The area

The counties it named.

The facts

Issued: Jul 23, 2017, 10:36 AM MST (17:36 UTC)
In effect from: Jul 23, 2017, 12:00 PM MST
Expired: Jul 24, 2017, 12:00 AM MST
In force: 12 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 17:38 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, 5.6 hours before the alert went out and 40 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: 723 J/kg
Mixed-layer CIN: -153 J/kg
Mixed-layer LCL: 1511 m above ground
0-6 km bulk shear: 9 kt
0-1 km storm-relative helicity: 19 m²/s²
0-3 km storm-relative helicity: 103 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 Jul 23, 5:12 AM MST, 5 hours 24 minutes earlier.

Area forecast discussion, Jul 23, 5:12 AM MST, 5 hours 24 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
Jul 23, 4:07 PM MST	Special Weather Statement	PSR	Gila	23 min
Jul 23, 4:23 PM MST	Severe Thunderstorm Warning	PSR	Gila	22 min

Nearby

Flash Flood Watches in Arizona, 2017 Every flash flood watch in 2017

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.