Alert archive / Arizona / Flash Flood Watches in 2019

Flash Flood Watch 1, NWS Tucson, AZ

July 23, 20195 counties in Arizona

NWS Tucson, AZ issued this flash flood watch at Jul 23, 2019, 11:25 AM MST for 5 counties in Arizona. It took effect at Jul 23, 2019, 2:00 PM MST. It was in force for 7 hr.

The area

The counties it named.

The facts

Issued: Jul 23, 2019, 11:25 AM MST (18:25 UTC)
In effect from: Jul 23, 2019, 2:00 PM MST
Expired: Jul 23, 2019, 8:47 PM MST
In force: 7 hr
Issued by: NWS Tucson, AZ
Flood severity: None

Counties Cochise County, AZ, Graham County, AZ, Pima County, AZ, Pinal County, AZ, Santa Cruz County, AZ

The radar

The Tucson radar (KEMX), 43 km from the middle of the area, began a volume at 18:23 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, 6.4 hours before the alert went out and 174 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: 1 J/kg
Mixed-layer CIN: -408 J/kg
Mixed-layer LCL: 2260 m above ground
0-6 km bulk shear: 16 kt
0-1 km storm-relative helicity: 35 m²/s²
0-3 km storm-relative helicity: 60 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 Tucson, AZ wrote its last area forecast discussion before this flash flood watch went out at Jul 23, 10:10 AM MST, 1 hour 15 minutes earlier.

Area forecast discussion, Jul 23, 10:10 AM MST, 1 hour 15 minutes before

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In the hours before

Local storm report, Jul 23, 8:41 AM MST, 2 hours 44 minutes before

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    <section class="card" role="status" aria-live="polite">
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        The site you requested is temporarily down for maintenance or an unexpected outage.
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The office that day

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

Issued	Product	Office	Counties	Lasted
Jul 22, 5:23 PM MST	Special Weather Statement	TWC	Pima	52 min
Jul 22, 5:31 PM MST	Severe Thunderstorm Warning	TWC	Cochise	44 min
Jul 22, 5:55 PM MST	Special Weather Statement	TWC	Graham	35 min
Jul 22, 6:20 PM MST	Dust Storm Warning	TWC	Pinal	25 min
Jul 22, 6:23 PM MST	Severe Thunderstorm Warning	TWC	Graham, Pinal	37 min
Jul 22, 6:28 PM MST	Special Weather Statement	TWC		62 min
Jul 22, 6:32 PM MST	Severe Thunderstorm Warning	TWC	Pima	43 min
Jul 22, 6:44 PM MST	Severe Thunderstorm Warning	TWC	Pinal	31 min
Jul 22, 6:48 PM MST	Severe Thunderstorm Warning	TWC	Pima, Pinal	42 min
Jul 22, 6:58 PM MST	Flash Flood Warning	TWC	Pinal	3 hr
Jul 22, 7:05 PM MST	Special Weather Statement	TWC	Pinal	25 min
Jul 22, 7:28 PM MST	Special Weather Statement	TWC	Pinal	47 min
Jul 22, 8:13 PM MST	Special Weather Statement	TWC	Pinal	47 min
Jul 23, 2:00 PM MST	Special Weather Statement	TWC	Santa Cruz	30 min
Jul 23, 2:49 PM MST	Areal Flood Advisory	TWC	Santa Cruz	116 min
Jul 23, 4:53 PM MST	Special Weather Statement	TWC	Graham	37 min

Nearby

Flash Flood Watches in Arizona, 2019 Every flash flood watch in 2019

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.