Alert archive / Arizona / Areal Flood Advisories in 2021

Areal Flood Advisory 21, NWS Tucson, AZ

July 5, 2021Santa Cruz County, Arizona

NWS Tucson, AZ issued this areal flood advisory at Jul 5, 2021, 4:31 AM MST for Santa Cruz County, Arizona. It was in force for 2 hr.

The area

The outline as issued.

The facts

Issued: Jul 5, 2021, 4:31 AM MST (11:31 UTC)
Expired: Jul 5, 2021, 6:42 AM MST
In force: 2 hr
Issued by: NWS Tucson, AZ
Area: Storm-based polygon

County Santa Cruz County, AZ

The radar

The Tucson radar (KEMX), 44 km from the middle of the area, began a volume at 11:33 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 00:00Z, 11.5 hours before the alert went out and 75 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: 494 J/kg
Mixed-layer CIN: -12 J/kg
Mixed-layer LCL: 2027 m above ground
0-6 km bulk shear: 4 kt
0-1 km storm-relative helicity: -52 m²/s²
0-3 km storm-relative helicity: 11 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

Open this sounding in Storm Lab

The text

As transmitted.

566 
WGUS85 KTWC 051131
FLSTWC

Flood Advisory
National Weather Service Tucson AZ
431 AM MST Mon Jul 5 2021

AZC023-051430-
/O.NEW.KTWC.FA.Y.0021.210705T1131Z-210705T1430Z/
/00000.N.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Santa Cruz AZ-
431 AM MST Mon Jul 5 2021

The National Weather Service in Tucson has issued a

* Urban and Small Stream Flood Advisory for...
  East Central Santa Cruz County in southeastern Arizona...

* Until 730 AM MST.

* At 431 AM MST, Doppler radar and automated rain gauges indicated 
  rainfall of 1 to 1.5 inches over the past 2 hours. Combined with 
  an already saturated ground from the past few days, this will 
  cause urban and small stream flooding in and around the Patagonia 
  area.

* Some locations that will experience flooding include...
  Patagonia and portions of Sonoita Creek.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Turn around, don't drown when encountering flooded roads. Most flood 
deaths occur in vehicles.

In hilly terrain there are hundreds of low water crossings which are 
potentially dangerous in heavy rain. Do not attempt to cross flooded 
roads. Find an alternate route.

&&

LAT...LON 3148 11079 3150 11082 3158 11073 3153 11065
      3147 11072

$$

WJM

1 follow-up statement

093 
WGUS85 KTWC 051342
FLSTWC

Flood Advisory
National Weather Service Tucson AZ
642 AM MST Mon Jul 5 2021

AZC023-051352-
/O.CAN.KTWC.FA.Y.0021.000000T0000Z-210705T1430Z/
/00000.N.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Santa Cruz AZ-
642 AM MST Mon Jul 5 2021

...THE URBAN AND SMALL STREAM FLOOD ADVISORY IS CANCELLED FOR EAST 
CENTRAL SANTA CRUZ COUNTY...

With little additional rainfall over the past few hours around the 
Patagonia area, Urban and small stream flooding is no longer 
expected to pose a threat. There will still be some ponding of water 
in roadways and elevated flow in some streams and washes this 
morning. Please continue to heed remaining road closures.

LAT...LON 3148 11079 3150 11082 3158 11073 3153 11065
      3147 11072

$$

WJM

The office that day

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

Issued	Product	Office	Counties	Lasted
Jul 4, 6:33 PM MST	Special Weather Statement	TWC		27 min
Jul 4, 6:39 PM MST	Flash Flood Warning Considerable damage threat	TWC	Pima	3 hr
Jul 5, 10:38 AM MST	Areal Flood Advisory	TWC	Cochise	112 min
Jul 5, 11:48 AM MST	Special Weather Statement	TWC	Cochise	42 min
Jul 5, 2:24 PM MST	Special Weather Statement	TWC	Cochise	51 min
Jul 5, 4:12 PM MST	Special Weather Statement	TWC	Cochise	33 min
Jul 5, 4:32 PM MST	Severe Thunderstorm Warning	TWC	Cochise	28 min

Nearby

Areal Flood Advisories in Arizona, 2021 Every areal flood advisory in 2021

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.