Alert archive / Arizona / Flash Flood Warnings in 2016

Flash Flood Warning 16, NWS Tucson, AZ

August 3, 2016Santa Cruz County, Arizona

NWS Tucson, AZ issued this flash flood warning at Aug 3, 2016, 3:01 PM MST for Santa Cruz County, Arizona. It was in force for 119 min. 1 report came from inside the area while it was in force.

The area

The outline as issued, with what was reported inside it.

The facts

Issued: Aug 3, 2016, 3:01 PM MST (22:01 UTC)
Expired: Aug 3, 2016, 5:00 PM MST
In force: 119 min
Issued by: NWS Tucson, AZ
Area: Storm-based polygon
Flood severity: None

County Santa Cruz County, AZ

The radar

The Tucson radar (KEMX), 64 km from the middle of the area, began a volume at 22:05 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.

What was reported inside it

Time	Report	Where	Remark
Aug 3, 3:15 PM MST	FLASH FLOOD	Nogales, AZ	BUSINESSES FLOODED ALONG HOHOKAM DRIVE

Local storm reports filed while the alert was in force, from inside its polygon or its counties.

The nearest sounding before it

Tuscon, AZ (KDMA), launched 12:00Z, 10.0 hours before the alert went out and 87 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: 959 J/kg
Mixed-layer CIN: -26 J/kg
Mixed-layer LCL: 1071 m above ground
0-6 km bulk shear: 3 kt
0-1 km storm-relative helicity: 22 m²/s²
0-3 km storm-relative helicity: 15 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

Open this sounding in Storm Lab

The text

As transmitted.

959 
WGUS55 KTWC 032201
FFWTWC
AZC023-040000-
/O.NEW.KTWC.FF.W.0016.160803T2201Z-160804T0000Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/

BULLETIN - EAS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE TUCSON AZ
301 PM MST WED AUG 3 2016

THE NATIONAL WEATHER SERVICE IN TUCSON HAS ISSUED A

* FLASH FLOOD WARNING FOR...
  SOUTH CENTRAL SANTA CRUZ COUNTY IN SOUTHEASTERN ARIZONA...

* UNTIL 500 PM MST

* AT 258 PM MST...DOPPLER RADAR AND AUTOMATED RAIN GAUGES INDICATED
  THUNDERSTORMS PRODUCING HEAVY RAIN IN NOGALES SONORA.
  RAPID RISES IN NOGALES WASH ARE EXPECTED IN THE CITY OF NOGALES 
  ARIZONA AND THE WASH COULD OVERFLOW ITS BANKS ON TO CITY STREETS
  AND LAND ADJACENT TO THE WASH.

* SOME LOCATIONS THAT WILL EXPERIENCE FLOODING INCLUDE...
  NOGALES.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

MOVE TO HIGHER GROUND NOW. ACT QUICKLY TO PROTECT YOUR LIFE.

&&

LAT...LON 3143 11098 3143 11093 3133 11088 3133 11105

$$

KD

2 follow-up statements

938 
WGUS75 KTWC 032222
FFSTWC

FLASH FLOOD STATEMENT
NATIONAL WEATHER SERVICE TUCSON AZ
322 PM MST WED AUG 3 2016

AZC023-040000-
/O.CON.KTWC.FF.W.0016.000000T0000Z-160804T0000Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
SANTA CRUZ-
322 PM MST WED AUG 3 2016

...THE FLASH FLOOD WARNING REMAINS IN EFFECT UNTIL 500 PM MST FOR
SOUTH CENTRAL SANTA CRUZ COUNTY...

AT 319 PM MST...DOPPLER RADAR AND AUTOMATED RAIN GAUGES INDICATED THAT
HEAVY RAIN HAD FALLEN OVER THE AREA.  FLASH FLOODING IS ALREADY
OCCURRING AS THE STREAM GAUGE ON THE NOGALES WASH SHOWS THAT WATER
IS LIKELY OVERFLOWING THE BANKS NEAR THE DOE STREET BRIDGE.

HEAVY RAIN HAS ALSO OCCURRED ALONG THE EPHRAIM WASH WHICH CAN 
CAUSE FLOODING ALONG WESTERN AVENUE.

NORMALLY DRY WASHES AND LOW WATER CROSSINGS MAY BE INUNDATED IN THE
FOLLOWING LOCATIONS...
NOGALES.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

TURN AROUND...DON'T DROWN WHEN ENCOUNTERING FLOODED ROADS. MOST FLOOD
DEATHS OCCUR IN VEHICLES.

&&

LAT...LON 3143 11098 3143 11093 3133 11088 3133 11105

$$

KD

837 
WGUS75 KTWC 032352
FFSTWC

FLASH FLOOD STATEMENT
NATIONAL WEATHER SERVICE TUCSON AZ
452 PM MST WED AUG 3 2016

AZC023-040000-
/O.EXP.KTWC.FF.W.0016.000000T0000Z-160804T0000Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
SANTA CRUZ-
452 PM MST WED AUG 3 2016

...THE FLASH FLOOD WARNING FOR SOUTH CENTRAL SANTA CRUZ COUNTY WILL
EXPIRE AT 500 PM MST...

THE HEAVY RAIN HAS ENDED IN THE NOGALES AREA. FLOOD WATERS HAVE RECEDED 
IN NOGALES WASH ALTHOUGH SOME LOCALIZED STREET FLOODING LIKELY REMAINS.
HOWEVER...FLOODING IS NO LONGER EXPECTED TO POSE A THREAT. THEREFORE
THE WARNING WILL BE ALLOWED TO EXPIRE.

PLEASE CONTINUE TO HEED ANY REMAINING ROAD CLOSURES.

LAT...LON 3143 11098 3143 11093 3133 11088 3133 11105

$$

KD

The office that day

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

Issued	Product	Office	Counties	Lasted
Aug 3, 7:53 AM MST	Areal Flood Advisory	TWC	Pima, Santa Cruz	112 min
Aug 3, 1:13 PM MST	Areal Flood Advisory	TWC	Cochise, Pima, Santa Cruz	2 hr
Aug 3, 2:54 PM MST	Areal Flood Advisory	TWC	Pima, Santa Cruz	111 min
Aug 3, 3:54 PM MST	Special Weather Statement	TWC	Pinal	36 min
Aug 3, 4:06 PM MST	Special Weather Statement	TWC		24 min
Aug 3, 4:22 PM MST	Areal Flood Advisory	TWC	Pinal	113 min
Aug 3, 4:44 PM MST	Flash Flood Warning	TWC	Pinal	2 hr

Nearby

Flash Flood Warnings in Arizona, 2016 Every flash flood warning in 2016

Sources

The product and its follow-ups from the Iowa Environmental Mesonet's archive of National Weather Service and Storm Prediction Center text; local storm reports from the same archive; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.