Alert archive / Arizona / Flash Flood Warnings in 2011

Flash Flood Warning 43, NWS Tucson, AZ

August 16, 2011Pima County, Arizona

NWS Tucson, AZ issued this flash flood warning at Aug 16, 2011, 3:53 PM MST for Pima County, Arizona. It was in force for 82 min. 5 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 16, 2011, 3:53 PM MST (22:53 UTC)
Expired
Aug 16, 2011, 5:15 PM MST
In force
82 min
Issued by
NWS Tucson, AZ
Area
Storm-based polygon
Flood severity
None

County Pima County, AZ

The radar

The Tucson radar (KEMX), 75 km from the middle of the area, began a volume at 22:54 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

TimeReportWhereRemark
Aug 16, 4:15 PM MSTFLASH FLOOD5 E Marana, AZWATER FLOWING ACROSS SEVERAL AREAS ON CAMINO DE MANANA.
Aug 16, 4:15 PM MSTFLASH FLOOD5 E Marana, AZWATER FLOWING OVER TANGERINE RD IN SEVERAL PLACES BETWEEN THORNYDALE RD AND INTERSTATE 10.
Aug 16, 4:15 PM MSTFLASH FLOOD6 W Oro Valley, AZCAMINO DE OESTE IMPASSABLE NORTH OF LINDA VISTA BLVD.
Aug 16, 4:20 PM MSTHEAVY RAIN 1.051 Se Dove Mountain, AZ
Aug 16, 4:20 PM MSTHEAVY RAIN 1.522 Se Dove Mountain, AZ

Local storm reports filed while the alert was in force, from inside its polygon or its counties.

The nearest sounding before it

Tuscon, AZ (KTUS), launched 12:00Z, 10.9 hours before the alert went out and 35 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 2011-08-16Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 269 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 2011-08-16The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity -14 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
269 J/kg
Mixed-layer CIN
-51 J/kg
Mixed-layer LCL
1299 m above ground
0-6 km bulk shear
5 kt
0-1 km storm-relative helicity
-14 m²/s²
0-3 km storm-relative helicity
77 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.

567 
WGUS55 KTWC 162253
FFWTWC
AZC019-170015-
/O.NEW.KTWC.FF.W.0043.110816T2253Z-110817T0015Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/

BULLETIN - EAS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE TUCSON AZ
353 PM MST TUE AUG 16 2011

THE NATIONAL WEATHER SERVICE IN TUCSON HAS ISSUED A

* FLASH FLOOD WARNING FOR...
  NORTHEASTERN PIMA COUNTY IN SOUTH CENTRAL ARIZONA...DOVE MOUNTAIN

* UNTIL 515 PM MST

* AT 345 PM MST...RADAR INDICATED A STRONG STORM CAPABLE OF          
  PRODUCING FLASH FLOODING IN THE DOVE MOUNTAIN AREA OF NORTHEAST    
  PIMA COUNTY. THIS STORM WAS SLOWLY DRIFTING TO THE SOUTH AT LESS   
  THAN 5 MPH. 

* LOCATIONS IN THE WARNING INCLUDE BUT ARE NOT LIMITED TO DOVE
  MOUNTAIN

PRECAUTIONARY/PREPAREDNESS ACTIONS...

EXCESSIVE RUNOFF FROM HEAVY RAINFALL WILL CAUSE FLOODING OF SMALL
CREEKS AND STREAMS...HIGHWAYS AND UNDERPASSES. ADDITIONALLY...COUNTRY
ROADS AND FARMLANDS ALONG THE BANKS OF CREEKS...STREAMS AND OTHER LOW
LYING AREAS ARE SUBJECT TO FLOODING.

&&

LAT...LON 3240 11115 3250 11115 3250 11100 3239 11101

$$
2 follow-up statements
478 
WGUS75 KTWC 162307
FFSTWC

FLASH FLOOD STATEMENT
NATIONAL WEATHER SERVICE TUCSON AZ
407 PM MST TUE AUG 16 2011

AZC019-170015-
/O.CON.KTWC.FF.W.0043.000000T0000Z-110817T0015Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
PIMA AZ-
407 PM MST TUE AUG 16 2011

...A FLASH FLOOD WARNING REMAINS IN EFFECT UNTIL 515 PM MST FOR 
NORTHEASTERN PIMA COUNTY...INCLUDING DOVE MOUNTAIN...

AT 403 PM MST...NATIONAL WEATHER SERVICE DOPPLER RADAR CONTINUED TO 
INDICATE A THUNDERSTORM PRODUCING FLASH FLOODING OVER DOVE 
MOUNTAIN...SKYRANCH...AND NORTHERN TORTOLITA AREAS. MOVEMENT OF THE 
STORM WAS SLOWLY TOWARD THE SOUTH AT LESS THAN 5 MPH. 

PRECAUTIONARY/PREPAREDNESS ACTIONS...

DO NOT DRIVE YOUR VEHICLE INTO AREAS WHERE THE WATER COVERS THE
ROADWAY. THE WATER DEPTH MAY BE TOO GREAT TO ALLOW YOUR CAR TO CROSS
SAFELY. MOVE TO HIGHER GROUND.

&&

LAT...LON 3240 11115 3250 11115 3250 11100 3239 11101

$$
857 
WGUS75 KTWC 170021
FFSTWC

FLASH FLOOD STATEMENT
NATIONAL WEATHER SERVICE TUCSON AZ
521 PM MST TUE AUG 16 2011

AZC019-170027-
/O.EXP.KTWC.FF.W.0043.000000T0000Z-110817T0015Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
PIMA AZ-
521 PM MST TUE AUG 16 2011

...THE FLASH FLOOD WARNING HAS EXPIRED FOR NORTHEASTERN PIMA
COUNTY...

AT 515 PM MST...NATIONAL WEATHER SERVICE RADAR INDICATED THE 
THUNDERSTORMS OVER DOVE MOUNTAIN HAD DIMINISHED. THEREFORE...THE 
FLASH FLOOD WARNING FOR THE DOVE MOUNTAIN AREA HAS BEEN ALLOWED TO 
EXPIRE.

HOWEVER...A FLASH FLOOD WARNING STILL CONTINUES IN EFFECT FOR  
NORTHWEST TUCSON AND MARANA UNTIL 6 PM MST.   

LAT...LON 3240 11115 3250 11115 3250 11100 3239 11101

$$
ZELL

The office that day

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

IssuedProductOfficeCountiesLasted
Aug 15, 9:39 PM MSTSpecial Weather StatementTWCPima36 min
Aug 15, 9:56 PM MSTAreal Flood AdvisoryTWCPima2 hr
Aug 15, 9:59 PM MSTSevere Thunderstorm WarningTWCPima46 min
Aug 15, 10:42 PM MSTSevere Thunderstorm WarningTWCPima48 min
Aug 15, 11:28 PM MSTSevere Thunderstorm WarningTWCPima62 min
Aug 15, 11:39 PM MSTAreal Flood AdvisoryTWCPima81 min
Aug 16, 3:11 PM MSTAreal Flood AdvisoryTWCPima, Santa Cruz2 hr
Aug 16, 4:14 PM MSTSevere Thunderstorm WarningTWCPima46 min
Aug 16, 4:28 PM MSTFlash Flood WarningTWCPima92 min

Nearby

Flash Flood Warnings in Arizona, 2011Every flash flood warning in 2011

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.