Alert archive / Arizona / Flash Flood Warnings in 2015

Flash Flood Warning 21, NWS Tucson, AZ

August 7, 2015Pima County, Arizona

NWS Tucson, AZ issued this flash flood warning at Aug 7, 2015, 1:08 PM MST for Pima County, Arizona. It was in force for 97 min. 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
Aug 7, 2015, 1:08 PM MST (20:08 UTC)
Expired
Aug 7, 2015, 2:45 PM MST
In force
97 min
Issued by
NWS Tucson, AZ
Area
Storm-based polygon
Flood severity
None

County Pima County, AZ

The radar

The Tucson radar (KEMX), 72 km from the middle of the area, began a volume at 20:12 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 7, 1:35 PM MSTFLASH FLOOD6 Ese Marana, AZWATER FLOWING ACROSS LINDA VISTA BLVD WEST OF HARTMAN LANE

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, 8.1 hours before the alert went out and 33 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 2015-08-07Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 983 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 2015-08-07The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity -16 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
983 J/kg
Mixed-layer CIN
-88 J/kg
Mixed-layer LCL
1639 m above ground
0-6 km bulk shear
11 kt
0-1 km storm-relative helicity
-16 m²/s²
0-3 km storm-relative helicity
-12 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.

042 
WGUS55 KTWC 072008
FFWTWC
AZC019-072145-
/O.NEW.KTWC.FF.W.0021.150807T2008Z-150807T2145Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/

BULLETIN - EAS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE TUCSON AZ
108 PM MST FRI AUG 7 2015

THE NATIONAL WEATHER SERVICE IN TUCSON HAS ISSUED A

* FLASH FLOOD WARNING FOR...
  NORTHERN PIMA COUNTY IN SOUTHEASTERN ARIZONA...

* UNTIL 245 PM MST
    
* AT 107 PM MST...DOPPLER RADAR AND AUTOMATED RAIN GAUGES INDICATED 
  A THUNDERSTORM PRODUCING HEAVY RAIN ACROSS THE JUST WEST OF ORO 
  VALLEY AND EAST OF MARANA. FLASH FLOODING IS EXPECTED TO BEGIN 
  SHORTLY. JUST OVER AN INCH OF RAIN HAS FALLEN IN ABOUT 45 MINUTES 
  WITH MORE RAIN EXPECTED. 

* SOME LOCATIONS THAT WILL EXPERIENCE FLOODING INCLUDE...
  ORO VALLEY...MARANA...TORTOLITA...CASAS ADOBES AND DOVE MOUNTAIN. 

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 3251 11097 3241 11096 3232 11104 3241 11113
      3249 11118

$$

CERNIGLIA
1 follow-up statement
410 
WGUS75 KTWC 072117
FFSTWC

FLASH FLOOD STATEMENT
NATIONAL WEATHER SERVICE TUCSON AZ
217 PM MST FRI AUG 7 2015

AZC019-072125-
/O.CAN.KTWC.FF.W.0021.000000T0000Z-150807T2145Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
PIMA AZ-
217 PM MST FRI AUG 7 2015

...THE FLASH FLOOD WARNING FOR NORTHERN PIMA COUNTY IS CANCELLED...

THE HEAVY RAIN ENDED AND WATER SHOULD HAVE RECEDED ENOUGH TO NO 
LONGER POSE A SIGNIFICANT AT THIS TIME.  STAY ALERT FOR THE 
POTENTIAL FOR FUTURE WARNING IN THE EVENT HEAVY RAIN RETURNS THIS 
EVENING. 

LAT...LON 3251 11097 3241 11096 3232 11104 3241 11113
      3249 11118

$$

CERNIGLIA

The office that day

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

IssuedProductOfficeCountiesLasted
Aug 7, 11:05 AM MSTSevere Thunderstorm WarningTWCPima, Pinal40 min
Aug 7, 11:16 AM MSTFlash Flood WarningTWCPima, Pinal119 min
Aug 7, 11:21 AM MSTSevere Thunderstorm WarningTWCGraham24 min
Aug 7, 11:39 AM MSTAreal Flood AdvisoryTWCGraham111 min
Aug 7, 12:11 PM MSTSpecial Weather StatementTWCGraham49 min
Aug 7, 12:21 PM MSTSpecial Weather StatementTWCPinal39 min
Aug 7, 12:31 PM MSTSpecial Weather StatementTWC29 min
Aug 7, 12:42 PM MSTSpecial Weather StatementTWC48 min
Aug 7, 12:43 PM MSTAreal Flood AdvisoryTWCGraham, Pinal3 hr
Aug 7, 12:48 PM MSTSevere Thunderstorm WarningTWCPima27 min
Aug 7, 12:57 PM MSTSevere Thunderstorm WarningTWCGraham, Pinal33 min
Aug 7, 1:02 PM MSTAreal Flood AdvisoryTWCGraham3 hr
Aug 7, 1:22 PM MSTFlash Flood WarningTWCPinal3 hr
Aug 7, 1:33 PM MSTSevere Thunderstorm WarningTWCPinal27 min
Aug 7, 1:36 PM MSTFlash Flood WarningTWCGraham3 hr
Aug 7, 1:36 PM MSTSpecial Weather StatementTWCPinal39 min
Aug 7, 1:43 PM MSTSevere Thunderstorm WarningTWCPinal47 min
Aug 7, 1:55 PM MSTSpecial Weather StatementTWC50 min
Aug 7, 1:57 PM MSTBlowing Dust AdvisoryTWCPinal2 hr
Aug 7, 2:05 PM MSTAreal Flood AdvisoryTWCPima115 min
Aug 7, 2:40 PM MSTFlash Flood WarningTWCPima, Pinal3 hr
Aug 7, 2:43 PM MSTSevere Thunderstorm WarningTWCPima15 min
Aug 7, 3:53 PM MSTFlash Flood WarningTWCPima, Pinal3 hr
Aug 7, 4:38 PM MSTAreal Flood AdvisoryTWCPima, Pinal3 hr

Nearby

Flash Flood Warnings in Arizona, 2015Every 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.