Alert archive / Arizona / Flash Flood Warnings in 2015

Flash Flood Warning 13, NWS Tucson, AZ

July 28, 2015Pima County, Arizona

NWS Tucson, AZ issued this flash flood warning at Jul 28, 2015, 4:53 PM MST for Pima County, Arizona. It was in force for 82 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, 2015, 4:53 PM MST (23:53 UTC)
Expired: Jul 28, 2015, 6:15 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), 47 km from the middle of the area, began a volume at 23:57 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, 11.9 hours before the alert went out and 11 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: 1039 J/kg
Mixed-layer CIN: -106 J/kg
Mixed-layer LCL: 1652 m above ground
0-6 km bulk shear: 1 kt
0-1 km storm-relative helicity: -25 m²/s²
0-3 km storm-relative helicity: 105 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.

994 
WGUS55 KTWC 282353
FFWTWC
AZC019-290115-
/O.NEW.KTWC.FF.W.0013.150728T2353Z-150729T0115Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/

BULLETIN - EAS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE TUCSON AZ
453 PM MST TUE JUL 28 2015

THE NATIONAL WEATHER SERVICE IN TUCSON HAS ISSUED A

* FLASH FLOOD WARNING FOR...
  EAST CENTRAL PIMA COUNTY IN SOUTHEASTERN ARIZONA...

* UNTIL 615 PM MST
    
* AT 451 PM MST...DOPPLER RADAR INDICATED A THUNDERSTORM PRODUCING 
  HEAVY RAIN ACROSS SOUTHWEST TUCSON. FLASH FLOODING IS EXPECTED TO 
  BEGIN SHORTLY.

* SOME LOCATIONS THAT WILL EXPERIENCE FLOODING INCLUDE...
  TUCSON...DREXEL HEIGHTS...TUCSON ESTATES...VALENCIA WEST...SOUTH
  TUCSON AND SAN XAVIER MISSION.

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 11097 3201 11096 3204 11109 3226 11111

$$

KD

The office that day

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

Issued	Product	Office	Counties	Lasted
Jul 28, 12:30 PM MST	Areal Flood Advisory	TWC	Cochise	2 hr
Jul 28, 2:18 PM MST	Special Weather Statement	TWC	Cochise	42 min
Jul 28, 2:30 PM MST	Areal Flood Advisory	TWC	Cochise	2 hr
Jul 28, 2:40 PM MST	Special Weather Statement	TWC	Pima	50 min
Jul 28, 3:24 PM MST	Areal Flood Advisory	TWC	Pima	111 min
Jul 28, 4:00 PM MST	Areal Flood Advisory	TWC	Santa Cruz	2 hr
Jul 28, 4:05 PM MST	Areal Flood Advisory	TWC	Pima, Pinal	115 min
Jul 28, 4:25 PM MST	Special Weather Statement	TWC	Santa Cruz	35 min
Jul 28, 4:45 PM MST	Areal Flood Advisory	TWC	Pima, Santa Cruz	2 hr
Jul 28, 4:52 PM MST	Areal Flood Advisory	TWC	Cochise, Pima	113 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.