Alert archive / Arizona / Flash Flood Warnings in 2012

Flash Flood Warning 19, NWS Tucson, AZ

July 28, 2012Santa Cruz County, Arizona

NWS Tucson, AZ issued this flash flood warning at Jul 28, 2012, 3:11 PM MST for Santa Cruz County, Arizona. It was in force for 60 min. No storm report in the archive falls inside the area while it was in force.

The area

The outline as issued.

The facts

Issued: Jul 28, 2012, 3:11 PM MST (22:11 UTC)
Expired: Jul 28, 2012, 4:11 PM MST
In force: 60 min
Issued by: NWS Tucson, AZ
Area: Storm-based polygon
Flood severity: None

County Santa Cruz County, AZ

The radar

The Tucson radar (KEMX), 39 km from the middle of the area, began a volume at 22:10 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 12:00Z, 10.2 hours before the alert went out and 68 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: 34 J/kg
Mixed-layer CIN: -67 J/kg
Mixed-layer LCL: 1726 m above ground
0-6 km bulk shear: 9 kt
0-1 km storm-relative helicity: -2 m²/s²
0-3 km storm-relative helicity: 71 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.

028 
WGUS55 KTWC 282211
FFWTWC
AZC023-290015-
/O.NEW.KTWC.FF.W.0019.120728T2211Z-120729T0015Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/

BULLETIN - EAS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE TUCSON AZ
311 PM MST SAT JUL 28 2012

THE NATIONAL WEATHER SERVICE IN TUCSON HAS ISSUED A

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

* UNTIL 515 PM MST

* AT 306 PM MST...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED
  FLASH FLOODING FROM A THUNDERSTORM NEAR PATAGONIA.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

THIS INCLUDES THE FOLLOWING STREAMS AND DRAINAGES...
SONOITA CREEK...HARSHAW CREEK.

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 3160 11084 3165 11066 3150 11068 3147 11087

$$

MEYER

2 follow-up statements

535 
WGUS75 KTWC 282242
FFSTWC

FLASH FLOOD STATEMENT
NATIONAL WEATHER SERVICE TUCSON AZ
342 PM MST SAT JUL 28 2012

AZC023-290015-
/O.CON.KTWC.FF.W.0019.000000T0000Z-120729T0015Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
SANTA CRUZ AZ-
342 PM MST SAT JUL 28 2012

...A FLASH FLOOD WARNING REMAINS IN EFFECT UNTIL 515 PM MST FOR
CENTRAL SANTA CRUZ COUNTY...

AT 336 PM MST...SHOWERS AND THUNDERSTORMS WERE WEAKENING ACROSS MOST 
OF CENTRAL SANTA CRUZ COUNTY INCLUDING THE PATAGONIA AREA. EARLIER 
RAINFALL AMOUNTS BETWEEN 1 AND 1.5 INCHES IN AND AROUND THE 
PATAGONIA AREA WILL CONTINUE TO GENERATE A FLASH FLOOD THREAT THIS 
AFTERNOON.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

THIS INCLUDES THE FOLLOWING STREAMS AND DRAINAGES...SONOITA 
CREEK...HARSHAW CREEK.

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 3160 11084 3165 11066 3150 11068 3147 11087

$$

MEYER

642 
WGUS75 KTWC 282311
FFSTWC

FLASH FLOOD STATEMENT
NATIONAL WEATHER SERVICE TUCSON AZ
411 PM MST SAT JUL 28 2012

AZC023-282321-
/O.CAN.KTWC.FF.W.0019.000000T0000Z-120729T0015Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
SANTA CRUZ AZ-
411 PM MST SAT JUL 28 2012

...THE FLASH FLOOD WARNING HAS BEEN CANCELLED FOR CENTRAL SANTA CRUZ
COUNTY...

AT 410 PM MST THE THUNDERSTORM ACTIVITY NEAR PATAGONIA HAD ENDED. 
EXPECT HEAVY FLOW IN STREAMBEDS AND WASHES TO CONTINUE INTO THE 
EARLY EVENING HOURS.

LAT...LON 3160 11084 3165 11066 3150 11068 3147 11087

$$

MEYER

The office that day

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

Issued	Product	Office	Counties	Lasted
Jul 27, 6:43 PM MST	Special Weather Statement	TWC		47 min
Jul 27, 8:49 PM MST	Special Weather Statement	TWC		41 min
Jul 28, 11:45 AM MST	Special Weather Statement	TWC	Cochise	30 min
Jul 28, 1:06 PM MST	Special Weather Statement	TWC	Cochise	39 min
Jul 28, 1:45 PM MST	Areal Flood Advisory	TWC	Cochise, Graham	3 hr
Jul 28, 2:26 PM MST	Special Weather Statement	TWC		34 min
Jul 28, 2:35 PM MST	Special Weather Statement	TWC	Graham	40 min
Jul 28, 2:44 PM MST	Severe Thunderstorm Warning	TWC	Pima	31 min
Jul 28, 3:02 PM MST	Special Weather Statement	TWC	Santa Cruz	43 min
Jul 28, 3:08 PM MST	Areal Flood Advisory	TWC	Pima	3 hr
Jul 28, 3:15 PM MST	Flash Flood Warning	TWC	Pima	2 hr
Jul 28, 3:29 PM MST	Special Weather Statement	TWC		31 min
Jul 28, 3:33 PM MST	Special Weather Statement	TWC		42 min
Jul 28, 3:54 PM MST	Flash Flood Warning	TWC	Pima	2 hr
Jul 28, 4:04 PM MST	Severe Thunderstorm Warning	TWC	Cochise	41 min
Jul 28, 4:23 PM MST	Flash Flood Warning	TWC	Cochise	2 hr
Jul 28, 4:44 PM MST	Special Weather Statement	TWC	Pinal	46 min

Nearby

Flash Flood Warnings in Arizona, 2012 Every flash flood warning in 2012

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.