Alert archive / Arizona / Flash Flood Warnings in 2016

Flash Flood Warning 18, NWS Tucson, AZ

August 4, 2016Cochise County, Arizona

NWS Tucson, AZ issued this flash flood warning at Aug 4, 2016, 12:58 PM MST for Cochise County, Arizona. It was in force for 3 hr. No storm report in the archive falls inside the area while it was in force.

The area

The outline as issued.

The facts

Issued: Aug 4, 2016, 12:58 PM MST (19:58 UTC)
Expired: Aug 4, 2016, 4:00 PM MST
In force: 3 hr
Issued by: NWS Tucson, AZ
Area: Storm-based polygon
Flood severity: None

County Cochise County, AZ

The radar

The Tucson radar (KEMX), 130 km from the middle of the area, began a volume at 19:59 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 (KDMA), launched 12:00Z, 8.0 hours before the alert went out and 160 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: 879 J/kg
Mixed-layer CIN: -65 J/kg
Mixed-layer LCL: 1263 m above ground
0-6 km bulk shear: 1 kt
0-1 km storm-relative helicity: 30 m²/s²
0-3 km storm-relative helicity: 48 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

Open this sounding in Storm Lab

The text

As transmitted.

307 
WGUS55 KTWC 041958
FFWTWC
AZC003-042300-
/O.NEW.KTWC.FF.W.0018.160804T1958Z-160804T2300Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/

BULLETIN - EAS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE TUCSON AZ
1258 PM MST THU AUG 4 2016

THE NATIONAL WEATHER SERVICE IN TUCSON HAS ISSUED A

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

* UNTIL 400 PM MST

* AT 1258 PM MST...DOPPLER RADAR AND AUTOMATED RAIN GAUGES INDICATED
  THUNDERSTORMS PRODUCING HEAVY RAIN ACROSS THE WARNED AREA. UP TO
  TWO INCHES OF RAIN HAVE ALREADY FALLEN JUST SOUTHEAST OF PORTAL.
  FLASH FLOODING IS EXPECTED TO BEGIN SHORTLY.

* SOME LOCATIONS THAT WILL EXPERIENCE FLOODING INCLUDE...
  RUCKER CANYON...PARADISE...
  CHIRICAHUA NATIONAL MONUMENT AND PORTAL. 

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

A FLASH FLOOD WARNING MEANS THAT FLOODING IS IMMINENT OR OCCURRING.
IF YOU ARE IN THE WARNED AREA MOVE TO HIGHER GROUND IMMEDIATELY.
RESIDENTS LIVING ALONG STREAMS AND CREEKS SHOULD TAKE IMMEDIATE
PRECAUTIONS TO PROTECT LIFE AND PROPERTY.

&&

LAT...LON 3168 10939 3205 10940 3207 10905 3165 10905

$$

LEINS

2 follow-up statements

776 
WGUS75 KTWC 042100
FFSTWC

FLASH FLOOD STATEMENT
NATIONAL WEATHER SERVICE TUCSON AZ
200 PM MST THU AUG 4 2016

AZC003-042300-
/O.CON.KTWC.FF.W.0018.000000T0000Z-160804T2300Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
COCHISE-
200 PM MST THU AUG 4 2016

...THE FLASH FLOOD WARNING REMAINS IN EFFECT UNTIL 400 PM MST FOR
EAST CENTRAL COCHISE COUNTY...

AT 159 PM MST...DOPPLER RADAR AND AUTOMATED RAIN GAUGES INDICATED
THUNDERSTORMS PRODUCING HEAVY RAIN OVER THE WARNED AREA. UP TO TWO
INCHES OF RAIN HAVE ALREADY FALLEN. FLASH FLOODING IS POSSIBLE NEAR
PORTAL. 

NORMALLY DRY WASHES AND LOW WATER CROSSINGS MAY BE INUNDATED IN THE
FOLLOWING LOCATIONS...
RUCKER CANYON...PARADISE...CHIRICAHUA NATIONAL MONUMENT AND PORTAL. 

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

A FLASH FLOOD WARNING MEANS THAT FLOODING IS IMMINENT OR OCCURRING.
IF YOU ARE IN THE WARNED AREA MOVE TO HIGHER GROUND IMMEDIATELY.
RESIDENTS LIVING ALONG STREAMS AND CREEKS SHOULD TAKE IMMEDIATE
PRECAUTIONS TO PROTECT LIFE AND PROPERTY.

&&

LAT...LON 3168 10939 3205 10940 3207 10905 3165 10905

$$

LEINS

758 
WGUS75 KTWC 042302
FFSTWC

FLASH FLOOD STATEMENT
NATIONAL WEATHER SERVICE TUCSON AZ
402 PM MST THU AUG 4 2016

AZC003-042311-
/O.EXP.KTWC.FF.W.0018.000000T0000Z-160804T2300Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
COCHISE-
402 PM MST THU AUG 4 2016

...THE FLASH FLOOD WARNING FOR EAST CENTRAL COCHISE COUNTY HAS
EXPIRED...

FLOODING IS NO LONGER EXPECTED TO POSE A THREAT. PLEASE CONTINUE TO
HEED ANY REMAINING ROAD CLOSURES.

LAT...LON 3168 10939 3205 10940 3207 10905 3165 10905

$$

The office that day

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

Issued	Product	Office	Counties	Lasted
Aug 3, 5:11 PM MST	Areal Flood Advisory	TWC	Pima	2 hr
Aug 3, 5:23 PM MST	Areal Flood Advisory	TWC	Pima, Pinal	112 min
Aug 4, 11:44 AM MST	Areal Flood Advisory	TWC	Cochise, Graham, Pima, Pinal	3 hr
Aug 4, 12:30 PM MST	Areal Flood Advisory	TWC	Cochise, Pima, Santa Cruz	3 hr
Aug 4, 3:23 PM MST	Areal Flood Advisory	TWC	Cochise	112 min

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; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.