Alert archive / Arizona / Flash Flood Warnings in 2015

Flash Flood Warning 5, NWS Tucson, AZ

July 12, 2015Santa Cruz County, Arizona

NWS Tucson, AZ issued this flash flood warning at Jul 12, 2015, 3:58 PM MST for Santa Cruz County, Arizona. It was in force for 2 hr. 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: Jul 12, 2015, 3:58 PM MST (22:58 UTC)
Expired: Jul 12, 2015, 6:00 PM MST
In force: 2 hr
Issued by: NWS Tucson, AZ
Area: Storm-based polygon
Flood severity: None

County Santa Cruz County, AZ

The radar

The Tucson radar (KEMX), 66 km from the middle of the area, began a volume at 22:57 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
Jul 12, 4:23 PM MST	FLASH FLOOD	Nogales, AZ	NOGALES WASH OVERFLOWING CAUSING ONE ROAD CLOSURE.

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, 11.0 hours before the alert went out and 89 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: 0 J/kg
Mixed-layer CIN: No buoyant parcel
Mixed-layer LCL: 2356 m above ground
0-6 km bulk shear: 23 kt
0-1 km storm-relative helicity: 28 m²/s²
0-3 km storm-relative helicity: 109 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

Open this sounding in Storm Lab

The text

As transmitted, in the capitals the NWS used until 2016.

410 
WGUS55 KTWC 122258
FFWTWC
AZC023-130100-
/O.NEW.KTWC.FF.W.0005.150712T2258Z-150713T0100Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/

BULLETIN - EAS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE TUCSON AZ
358 PM MST SUN JUL 12 2015

THE NATIONAL WEATHER SERVICE IN TUCSON HAS ISSUED A

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

* UNTIL 600 PM MST
    
* AT 356 PM MST...DOPPLER RADAR AND AUTOMATED RAIN GAUGES INDICATED 
  AN AREA OF THUNDERSTORMS PRODUCING HEAVY RAIN ACROSS AREAS AROUND 
  THE NOGALES AREA. EXTREMELY HEAVY FLOW IN NOGALES WASH IS EXPECTED 
  TO LEAD TO FLASH FLOODING.

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

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

LAT...LON 3134 11100 3140 11102 3140 11101 3141 11088
      3140 11088 3133 11086 3133 11100

$$

MEYER

2 follow-up statements

042 
WGUS75 KTWC 130009
FFSTWC

FLASH FLOOD STATEMENT
NATIONAL WEATHER SERVICE TUCSON AZ
509 PM MST SUN JUL 12 2015

AZC023-130100-
/O.CON.KTWC.FF.W.0005.000000T0000Z-150713T0100Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
SANTA CRUZ AZ-
509 PM MST SUN JUL 12 2015

...THE FLASH FLOOD WARNING REMAINS IN EFFECT UNTIL 600 PM MST FOR
SOUTH CENTRAL SANTA CRUZ COUNTY...

AT 503 PM MST...THE NOGALES WASH CONTINUED TO FLOW STRONGLY 
ALTHOUGH IT HAD RECEDED FROM ITS HIGHEST LEVELS THAT HAD 
PROMPTED THE CLOSING OF DOE STREET IN NOGALES.

RAIN GAUGES INDICATE 1 TO 2 INCHES OF RAIN HAVE FALLEN IN THE 
NOGALES AREA AND ONE GAUGE UPSTREAM IN SONORA REGISTERED JUST OVER 2 
INCHES.

ANOTHER BATCH OF THUNDERSTORMS IN SONORA WAS MOVING NORTH TOWARD
THE CITY OF NOGALES SONORA AND COULD PRODUCE ADDITIONAL FLOWS
THAT CAUSE ANOTHER RISE LEVELS OF NOGALES WASH IN ARIZONA.

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

PRECAUTIONARY/PREPAREDNESS ACTIONS...

STAY AWAY OR BE SWEPT AWAY. DO NOT LET CHILDREN PLAY NEAR 
WASHES. DO NOT ATTEMPT TO CROSS RAPIDLY FLOWING WATER ON FOOT OR IN 
A VEHICLE.

&&

LAT...LON 3134 11100 3140 11102 3140 11101 3141 11088
      3140 11088 3133 11086 3133 11100

$$

KD

922 
WGUS75 KTWC 130100
FFSTWC

FLASH FLOOD STATEMENT
NATIONAL WEATHER SERVICE TUCSON AZ
600 PM MST SUN JUL 12 2015

AZC023-130107-
/O.EXP.KTWC.FF.W.0005.000000T0000Z-150713T0100Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
SANTA CRUZ AZ-
600 PM MST SUN JUL 12 2015

...THE FLASH FLOOD WARNING FOR SOUTH CENTRAL SANTA CRUZ COUNTY WILL
EXPIRE AT 600 PM MST...

LEVELS IN THE NOGALES WASH HAD RECEDED...AN NO LONGER POSED A THREAT 
TO LIFE OR PROPERTY. PLEASE CONTINUE TO HEED ANY ROAD CLOSURES.

ADDITIONAL SHOWERS AND THUNDERSTORMS ARE STILL POSSIBLE IN NOGALES 
THIS EVENING.  REMEMBER NEVER TO CROSS RAPIDLY FLOWING WATER.

LAT...LON 3134 11100 3140 11102 3140 11101 3141 11088
      3140 11088 3133 11086 3133 11100

$$

KD

The office that day

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

Issued	Product	Office	Counties	Lasted
Jul 11, 5:22 PM MST	Special Weather Statement	TWC		38 min
Jul 11, 5:54 PM MST	Special Weather Statement	TWC	Graham	36 min
Jul 11, 6:24 PM MST	Special Weather Statement	TWC	Graham	51 min
Jul 11, 7:25 PM MST	Areal Flood Advisory	TWC	Graham	3 hr
Jul 12, 12:58 PM MST	Special Weather Statement	TWC	Santa Cruz	32 min
Jul 12, 1:46 PM MST	Special Weather Statement	TWC	Santa Cruz	44 min
Jul 12, 1:52 PM MST	Special Weather Statement	TWC		38 min
Jul 12, 2:01 PM MST	Severe Thunderstorm Warning	TWC	Cochise, Graham	29 min
Jul 12, 2:20 PM MST	Special Weather Statement	TWC	Santa Cruz	40 min
Jul 12, 2:28 PM MST	Severe Thunderstorm Warning	TWC	Graham	47 min
Jul 12, 2:41 PM MST	Areal Flood Advisory	TWC	Cochise, Graham	3 hr
Jul 12, 2:54 PM MST	Severe Thunderstorm Warning	TWC	Pima	23 min
Jul 12, 3:16 PM MST	Special Weather Statement	TWC	Cochise	44 min
Jul 12, 3:43 PM MST	Flash Flood Warning	TWC	Graham	2 hr
Jul 12, 4:21 PM MST	Special Weather Statement	TWC	Cochise	39 min
Jul 12, 4:40 PM MST	Special Weather Statement	TWC	Cochise	50 min

Nearby

Flash Flood Warnings in Arizona, 2015 Every flash flood warning in 2015

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.