Alert archive / Arizona / Flash Flood Warnings in 2016

Flash Flood Warning 14, NWS Tucson, AZ

August 2, 2016Cochise County, Pima County, Arizona

NWS Tucson, AZ issued this flash flood warning at Aug 2, 2016, 8:25 AM MST for Cochise County, Pima County, Arizona. It was in force for 3 hr. 3 reports 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 2, 2016, 8:25 AM MST (15:25 UTC)
Expired: Aug 2, 2016, 11:30 AM MST
In force: 3 hr
Issued by: NWS Tucson, AZ
Area: Storm-based polygon
Flood severity: None

Counties Cochise County, AZ, Pima County, AZ

The radar

The Tucson radar (KEMX), 9 km from the middle of the area, began a volume at 15:29 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 2, 8:50 AM MST	FLASH FLOOD	4 Ene Corona De Tucson, AZ	1 TO 2 FEET OF WATER FLOWING ACROSS SAHUARITA ROAD NEAR CALLE RINCONADO
Aug 2, 9:30 AM MST	FLASH FLOOD	3 Sse Vail, AZ	WATER FLOWING ACROSS S. CAMINO LOMA ALTA NEAR SUNDOWN BLVD
Aug 2, 10:05 AM MST	FLASH FLOOD	3 N Corona De Tucson, AZ	SWIFT WATER RESCUE ANDRADA AND HOUGHTON ROADS

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, 3.4 hours before the alert went out and 32 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: 1173 J/kg
Mixed-layer CIN: -40 J/kg
Mixed-layer LCL: 1147 m above ground
0-6 km bulk shear: 8 kt
0-1 km storm-relative helicity: -24 m²/s²
0-3 km storm-relative helicity: 6 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

Open this sounding in Storm Lab

The text

As transmitted.

394 
WGUS55 KTWC 021525
FFWTWC
AZC003-019-021830-
/O.NEW.KTWC.FF.W.0014.160802T1525Z-160802T1830Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/

BULLETIN - EAS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE TUCSON AZ
825 AM MST TUE AUG 2 2016

THE NATIONAL WEATHER SERVICE IN TUCSON HAS ISSUED A

* FLASH FLOOD WARNING FOR...
  NORTHWESTERN COCHISE COUNTY IN SOUTHEASTERN ARIZONA...
  EAST CENTRAL PIMA COUNTY IN SOUTHEASTERN ARIZONA...

* UNTIL 1130 AM MST

* AT 824 AM MST...DOPPLER RADAR INDICATED THUNDERSTORMS PRODUCING
  HEAVY RAIN ACROSS THE WARNED AREA. UP TO ONE INCH OF RAIN HAS
  ALREADY FALLEN. FLASH FLOODING IS EXPECTED TO BEGIN SHORTLY.

* SOME LOCATIONS THAT WILL EXPERIENCE FLOODING INCLUDE...
  EAST SAHUARITA...VAIL...RITA RANCH...CORONA DE TUCSON AND SAGUARO
  NATIONAL PARK EAST.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

EXCESSIVE RUNOFF FROM HEAVY RAINFALL WILL CAUSE FLOODING OF SMALL
CREEKS AND STREAMS...URBAN AREAS...HIGHWAYS...STREETS AND
UNDERPASSES AS WELL AS OTHER DRAINAGE AREAS AND LOW LYING SPOTS.

&&

LAT...LON 3182 11063 3196 11088 3220 11074 3205 11037

$$

CANTIN

1 follow-up statement

440 
WGUS75 KTWC 021823
FFSTWC

FLASH FLOOD STATEMENT
NATIONAL WEATHER SERVICE TUCSON AZ
1123 AM MST TUE AUG 2 2016

AZC003-019-021831-
/O.EXP.KTWC.FF.W.0014.000000T0000Z-160802T1830Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
COCHISE-PIMA-
1123 AM MST TUE AUG 2 2016

...THE FLASH FLOOD WARNING FOR NORTHWESTERN COCHISE AND EAST CENTRAL
PIMA COUNTIES WILL EXPIRE AT 1130 AM MST...

FLOODING CONTINUES IN PORTIONS OF THE WARNED AREA...HOWEVER...THE
RECENTLY ISSUED AREAL FLOOD WARNING NOW TAKES THE PLACE OF THIS
PRODUCT. WASHES WILL REMAIN SWOLLEN WITH WATER AND DANGEROUS INTO
THE AFTERNOON HOURS.

LAT...LON 3182 11063 3196 11088 3220 11074 3205 11037

$$

CANTIN

The office that day

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

Issued	Product	Office	Counties	Lasted
Aug 2, 2:45 AM MST	Flash Flood Watch	TWC	Cochise, Graham, Greenlee, Pima, Pinal, Santa Cruz	42 hr
Aug 2, 8:08 AM MST	Areal Flood Advisory	TWC	Pima	3 hr
Aug 2, 8:16 AM MST	Areal Flood Advisory	TWC	Pima	3 hr
Aug 2, 9:10 AM MST	Areal Flood Advisory	TWC	Pima, Santa Cruz	2 hr
Aug 2, 9:16 AM MST	Areal Flood Advisory	TWC	Cochise, Pima	119 min
Aug 2, 11:13 AM MST	Areal Flood Warning	TWC	Cochise, Graham, Pima, Pinal, Santa Cruz	6 hr
Aug 2, 12:09 PM MST	Flash Flood Warning	TWC	Cochise	3 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.