Alert archive / Arizona / Flash Flood Warnings in 2015

Flash Flood Warning 39, NWS Tucson, AZ

August 22, 2015Pima County, Arizona

NWS Tucson, AZ issued this flash flood warning at Aug 22, 2015, 3:56 PM MST for Pima County, Arizona. It was in force for 2 hr. No storm report in the archive falls inside the area while it was in force.

The area

The outline as issued.

The facts

Issued: Aug 22, 2015, 3:56 PM MST (22:56 UTC)
Expired: Aug 22, 2015, 6:00 PM MST
In force: 2 hr
Issued by: NWS Tucson, AZ
Area: Storm-based polygon
Flood severity: None

County Pima County, AZ

The radar

The Tucson radar (KEMX), 45 km from the middle of the area, began a volume at 22:59 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 (KDMA), launched 12:00Z, 10.9 hours before the alert went out and 6 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: 2101 J/kg
Mixed-layer CIN: -42 J/kg
Mixed-layer LCL: 1353 m above ground
0-6 km bulk shear: 5 kt
0-1 km storm-relative helicity: 0 m²/s²
0-3 km storm-relative helicity: 32 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.

906 
WGUS55 KTWC 222256
FFWTWC
AZC019-230100-
/O.NEW.KTWC.FF.W.0039.150822T2256Z-150823T0100Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/

BULLETIN - EAS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE TUCSON AZ
356 PM MST SAT AUG 22 2015

THE NATIONAL WEATHER SERVICE IN TUCSON HAS ISSUED A

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

* UNTIL 600 PM MST
    
* AT 354 PM MST...DOPPLER RADAR INDICATED A THUNDERSTORM PRODUCING 
  HEAVY RAIN ACROSS PORTIONS OF THE TUCSON AREA MAINLY ALONG AND 
  NEAR INTERSTATE 19 NORTH OF VALENCIA ROAD TO ALONG AND NEAR THE 
  INTERSTATE 10 AND MIRACLE MILE AREA . FLASH FLOODING IS EXPECTED 
  TO BEGIN SHORTLY.

* SOME LOCATIONS THAT WILL EXPERIENCE FLOODING INCLUDE...
  TUCSON...LITTLETOWN...DREXEL-ALVERNON...DREXEL HEIGHTS...FLOWING
  WELLS...SUMMIT...VALENCIA WEST...TUCSON ESTATES...SOUTH TUCSON...
  SAN XAVIER MISSION AND TUCSON INTERNATIONAL AIRPORT.

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 3225 11088 3206 11087 3208 11110 3230 11107

$$

GL

1 follow-up statement

505 
WGUS75 KTWC 222349
FFSTWC

FLASH FLOOD STATEMENT
NATIONAL WEATHER SERVICE TUCSON AZ
449 PM MST SAT AUG 22 2015

AZC019-230100-
/O.CON.KTWC.FF.W.0039.000000T0000Z-150823T0100Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
PIMA AZ-
449 PM MST SAT AUG 22 2015

...THE FLASH FLOOD WARNING REMAINS IN EFFECT UNTIL 600 PM MST FOR
NORTHEASTERN PIMA COUNTY...

AT 447 PM MST...DOPPLER RADAR INDICATED THUNDERSTORMS WHICH CONTINUE 
TO PRODUCE HEAVY RAIN ACROSS METRO TUCSON. UP TO ONE INCH OF RAIN 
HAS ALREADY FALLEN IN LESS THAN 30 MINUTES. FLASH FLOODING IS 
OCURRING.

SOME LOCATIONS THAT WILL EXPERIENCE FLOODING INCLUDE...
TUCSON...LITTLETOWN...DREXEL-ALVERNON...DREXEL HEIGHTS...FLOWING
WELLS...SUMMIT...VALENCIA WEST...TUCSON ESTATES...SOUTH TUCSON...SAN
XAVIER MISSION AND TUCSON INTERNATIONAL AIRPORT.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

TURN AROUND...DONT DROWN WHEN ENCOUNTERING FLOODED ROADS. MOST FLOOD
DEATHS OCCUR IN VEHICLES.

&&

LAT...LON 3225 11088 3206 11087 3208 11110 3230 11107

$$

GL

The office that day

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

Issued	Product	Office	Counties	Lasted
Aug 22, 4:50 AM MST	Areal Flood Advisory	TWC	Pinal	3 hr
Aug 22, 11:08 AM MST	Areal Flood Advisory	TWC	Cochise	112 min
Aug 22, 11:36 AM MST	Special Weather Statement	TWC	Cochise	39 min
Aug 22, 11:44 AM MST	Special Weather Statement	TWC		46 min
Aug 22, 12:11 PM MST	Special Weather Statement	TWC	Santa Cruz	34 min
Aug 22, 12:26 PM MST	Severe Thunderstorm Warning	TWC	Cochise	49 min
Aug 22, 1:08 PM MST	Flash Flood Warning	TWC	Cochise	82 min
Aug 22, 1:29 PM MST	Special Weather Statement	TWC	Santa Cruz	31 min
Aug 22, 2:00 PM MST	Severe Thunderstorm Warning	TWC	Cochise	30 min
Aug 22, 2:10 PM MST	Flash Flood Warning	TWC	Santa Cruz	110 min
Aug 22, 2:25 PM MST	Severe Thunderstorm Warning	TWC	Cochise	50 min
Aug 22, 2:47 PM MST	Special Weather Statement	TWC	Santa Cruz	43 min
Aug 22, 3:14 PM MST	Areal Flood Advisory	TWC	Cochise	2 hr
Aug 22, 3:18 PM MST	Special Weather Statement	TWC	Cochise	27 min
Aug 22, 3:18 PM MST	Severe Thunderstorm Warning	TWC	Pima, Santa Cruz	27 min
Aug 22, 3:22 PM MST	Areal Flood Advisory	TWC	Greenlee	113 min
Aug 22, 3:45 PM MST	Severe Thunderstorm Warning	TWC	Pima	30 min
Aug 22, 3:47 PM MST	Severe Thunderstorm Warning	TWC	Pima	43 min
Aug 22, 3:55 PM MST	Flash Flood Warning	TWC	Pima, Santa Cruz	2 hr
Aug 22, 4:07 PM MST	Severe Thunderstorm Warning	TWC	Pima	53 min
Aug 22, 4:32 PM MST	Flash Flood Warning	TWC	Pima	118 min
Aug 22, 4:45 PM MST	Special Weather Statement	TWC		30 min
Aug 22, 4:57 PM MST	Special Weather Statement	TWC	Pima	48 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; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.