Alert archive / Arizona / Flash Flood Warnings in 2012

Flash Flood Warning 9, NWS Tucson, AZ

July 14, 2012Pima County, Pinal County, Arizona

NWS Tucson, AZ issued this flash flood warning at Jul 14, 2012, 2:47 PM MST for Pima County, Pinal County, Arizona. It was in force for 118 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 14, 2012, 2:47 PM MST (21:47 UTC)
Expired
Jul 14, 2012, 4:45 PM MST
In force
118 min
Issued by
NWS Tucson, AZ
Area
Storm-based polygon
Flood severity
None

Counties Pima County, AZ, Pinal County, AZ

The radar

The Phoenix radar (KIWA), 91 km from the middle of the area, began a volume at 21:49 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, 9.8 hours before the alert went out and 61 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-pSkew-T log-p diagram, Tuscon, AZ at 12:00Z on 2012-07-14Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 1664 joules per kilogram.LCLLFCEL10008507005003002001001 km2 km3 km6 km9 km12 km15 km-30°-20°-10°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Tuscon, AZ at 12:00Z on 2012-07-14The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity -12 square meters per square second.1939Sfc1 km3 km6 km9 kmRMLM
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
1664 J/kg
Mixed-layer CIN
-27 J/kg
Mixed-layer LCL
1040 m above ground
0-6 km bulk shear
18 kt
0-1 km storm-relative helicity
-12 m²/s²
0-3 km storm-relative helicity
52 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.

605 
WGUS55 KTWC 142147
FFWTWC
AZC019-021-142345-
/O.NEW.KTWC.FF.W.0009.120714T2147Z-120714T2345Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/

BULLETIN - EAS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE TUCSON AZ
247 PM MST SAT JUL 14 2012

THE NATIONAL WEATHER SERVICE IN TUCSON HAS ISSUED A

* FLASH FLOOD WARNING FOR...
  NORTH CENTRAL PIMA COUNTY IN SOUTH CENTRAL ARIZONA...
  THIS INCLUDES THE CITIES OF...ORO VALLEY...MARANA...
  SOUTHERN PINAL COUNTY IN SOUTH CENTRAL ARIZONA...

* UNTIL 445 PM MST

* AT 237 PM MST...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED   
  HEAVY RAIN FROM SEVERAL THUNDERSTORM OVER THE WARNED AREA. RAIN 
  AMOUNTS OF 1 TO 2 INCHES WERE ESTIMATED IN THE CATALINA 
  MOUNTAINS...ORO VALLEY...SOUTHWEST OF AVRA VALLEY AND FARTHER
  WEST BETWEEN QUEENS WELL AND FRIENDLY CORNERS.

* LOCATIONS IN THE WARNING INCLUDE BUT ARE NOT LIMITED TO ORACLE...
  ORO VALLEY...PICTURE ROCKS AND AVRA VALLEY.

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 3268 11188 3266 11068 3234 11086 3211 11181

$$

KD
2 follow-up statements
807 
WGUS75 KTWC 142256
FFSTWC

FLASH FLOOD STATEMENT
NATIONAL WEATHER SERVICE TUCSON AZ
356 PM MST SAT JUL 14 2012

AZC019-021-142345-
/O.CON.KTWC.FF.W.0009.000000T0000Z-120714T2345Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
PIMA AZ-PINAL AZ-
356 PM MST SAT JUL 14 2012

...A FLASH FLOOD WARNING REMAINS IN EFFECT UNTIL 445 PM MST FOR
SOUTHERN PINAL AND NORTH CENTRAL PIMA COUNTIES...

AT 347 PM MST...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED THAT
HEAVY RAIN HAD SUBSIDED IN THE WARNED AREA BUT RUNOFF WILL CONTINUE.

URBAN AREAS IN THE WARNING INCLUDE BUT ARE NOT LIMITED TO ORACLE...
ORO VALLEY...PICTURE ROCKS...AND AVRA VALLEY.  THE FOLLOWING 
STREAMS AND DRAINAGES MAY ALSO BE AFFECTED...BIG WASH...BLANCO
WASH...CANADA DEL ORO WASH...BRAWLEY WASH...AND WASHES RUNNING 
THROUGH IRONWOOD NATIONAL FOREST INTO PINAL COUNTY.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

MOST FLOOD DEATHS OCCUR IN AUTOMOBILES. NEVER DRIVE YOUR VEHICLE INTO
AREAS WHERE THE WATER COVERS THE ROADWAY. FLOOD WATERS ARE USUALLY
DEEPER THAN THEY APPEAR. JUST ONE FOOT OF FLOWING WATER IS POWERFUL
ENOUGH TO SWEEP VEHICLES OFF THE ROAD. WHEN ENCOUNTERING FLOODED
ROADS MAKE THE SMART CHOICE...TURN AROUND...DONT DROWN.

&&

LAT...LON 3268 11188 3266 11068 3234 11086 3211 11181

$$

KD
281 
WGUS75 KTWC 142339
FFSTWC

FLASH FLOOD STATEMENT
NATIONAL WEATHER SERVICE TUCSON AZ
439 PM MST SAT JUL 14 2012

AZC019-021-142346-
/O.EXP.KTWC.FF.W.0009.000000T0000Z-120714T2345Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
PIMA AZ-PINAL AZ-
439 PM MST SAT JUL 14 2012

...THE FLASH FLOOD WARNING WILL EXPIRE AT 445 PM MST FOR SOUTHERN
PINAL AND NORTH CENTRAL PIMA COUNTIES...

HEAVY RAIN HAD EXITED THE WARNED AREA OF PINAL AND PIMA COUNTIES...
BUT SOME RUNOFF WILL CONTINUE.  AN URBAN AND SMALL STREAM FLOOD
ADVISORY REMAINS IN EFFECT FOR THESE AREAS UNTIL 530 PM MST.

NO REPORTS OF FLASH FLOODING HAVE BEEN RECEIVED. TO REPORT
SEVERE WEATHER OR FLASH FLOODING CONTACT LOCAL LAW ENFORCEMENT
OR THE NATIONAL WEATHER SERVICE.

&&

LAT...LON 3268 11188 3266 11068 3234 11086 3211 11181

$$

KD

The office that day

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

IssuedProductOfficeCountiesLasted
Jul 13, 5:18 PM MSTSpecial Weather StatementTWCSanta Cruz42 min
Jul 14, 12:26 PM MSTAreal Flood AdvisoryTWCCochise, Pima, Santa Cruz3 hr
Jul 14, 12:48 PM MSTSpecial Weather StatementTWCSanta Cruz42 min
Jul 14, 1:04 PM MSTAreal Flood AdvisoryTWCCochise, Graham, Pima, Pinal4 hr
Jul 14, 1:42 PM MSTFlash Flood WarningTWCPima2 hr
Jul 14, 1:48 PM MSTSpecial Weather StatementTWC42 min
Jul 14, 2:15 PM MSTSevere Thunderstorm WarningTWCPima, Pinal45 min
Jul 14, 4:49 PM MSTSpecial Weather StatementTWC41 min

Nearby

Flash Flood Warnings in Arizona, 2012Every 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.