Alert archive / Arizona / Flash Flood Warnings in 2016

Flash Flood Warning 11, NWS Tucson, AZ

July 31, 2016Pima County, Arizona

NWS Tucson, AZ issued this flash flood warning at Jul 31, 2016, 9:06 PM MST for Pima County, Arizona. It was in force for 114 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: Jul 31, 2016, 9:06 PM MST (04:06 UTC)
Expired: Jul 31, 2016, 11:00 PM MST
In force: 114 min
Issued by: NWS Tucson, AZ
Area: Storm-based polygon
Flood severity: None

County Pima County, AZ

The radar

The Tucson radar (KEMX), 27 km from the middle of the area, began a volume at 04:07 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

Time	Report	Where	Remark
Jul 31, 10:20 PM MST	FLASH FLOOD	3 Wsw Rita Ranch, AZ	FLASH FLOODING OF STREETS NEAR KOLB AND INTERSTATE-10. MEASURED 3.45 INCHES OF RAIN.

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 00:00Z, 4.1 hours before the alert went out and 14 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: 688 J/kg
Mixed-layer CIN: -31 J/kg
Mixed-layer LCL: 2117 m above ground
0-6 km bulk shear: 14 kt
0-1 km storm-relative helicity: -6 m²/s²
0-3 km storm-relative helicity: 86 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

Open this sounding in Storm Lab

The text

As transmitted.

759 
WGUS55 KTWC 010406
FFWTWC
AZC019-010600-
/O.NEW.KTWC.FF.W.0011.160801T0406Z-160801T0600Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/

BULLETIN - EAS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE TUCSON AZ
906 PM MST SUN JUL 31 2016

THE NATIONAL WEATHER SERVICE IN TUCSON HAS ISSUED A

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

* UNTIL 1100 PM MST

* AT 900 PM MST...DOPPLER RADAR AND TRAINED WEATHER SPOTTERS
  INDICATED THUNDERSTORMS PRODUCING HEAVY RAIN ACROSS THE FAR
  SOUTHEAST PORTIONS OF THE TUCSON METRO AREA INCLUDING RITA RANCH.
  
A TRAINED WEATHER SPOTTER IN RITA RANCH REPORTED 1.33 INCHES OF RAIN
HAD FALLEN IN AROUND A HALF HOUR. WEATHER RADAR INDICATED 1 TO 2
INCHES OF RAIN HAS FALLEN ALONG AND WEST OF HOUGHTON ROAD...WITH THE
HEAVIEST RAINFALL NEAR I-10 AND HOUGHTON. FLASH FLOODING IS 
EXPECTED TO BEGIN SHORTLY.

* SOME LOCATIONS THAT WILL EXPERIENCE FLOODING INCLUDE...
  TUCSON...SUMMIT...EAST SAHUARITA...RITA RANCH AND SAGUARO NATIONAL
  PARK EAST.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

TURN AROUND...DON'T DROWN WHEN ENCOUNTERING FLOODED ROADS. MOST FLOOD
DEATHS OCCUR IN VEHICLES.

&&

LAT...LON 3217 11069 3193 11081 3199 11095 3220 11081

$$

The office that day

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

Issued	Product	Office	Counties	Lasted
Jul 31, 5:34 PM MST	Areal Flood Advisory	TWC	Cochise, Pima, Santa Cruz	116 min
Jul 31, 5:36 PM MST	Severe Thunderstorm Warning	TWC	Cochise	39 min
Jul 31, 6:09 PM MST	Special Weather Statement	TWC	Cochise	51 min
Jul 31, 6:12 PM MST	Severe Thunderstorm Warning	TWC	Cochise	48 min
Jul 31, 6:41 PM MST	Flash Flood Warning	TWC	Cochise	109 min
Jul 31, 6:48 PM MST	Flash Flood Warning	TWC	Cochise	117 min
Jul 31, 7:55 PM MST	Areal Flood Advisory	TWC	Cochise, Graham, Pima, Santa Cruz	110 min
Jul 31, 8:10 PM MST	Flash Flood Warning	TWC	Cochise	110 min
Jul 31, 8:37 PM MST	Areal Flood Advisory	TWC	Pima	3 hr
Jul 31, 10:17 PM MST	Flash Flood Warning	TWC	Pima	3 hr
Jul 31, 10:42 PM MST	Areal Flood Advisory	TWC	Pima, Pinal	6 hr
Jul 31, 11:12 PM MST	Blowing Dust Advisory	TWC	Pima, Pinal	108 min
Aug 1, 2:35 PM MST	Areal Flood Advisory	TWC	Santa Cruz	55 min
Aug 1, 3:33 PM MST	Areal Flood Advisory	TWC	Cochise	57 min
Aug 1, 4:21 PM MST	Areal Flood Advisory	TWC	Pima, Pinal	54 min
Aug 1, 4:47 PM MST	Flash Flood Warning	TWC	Pima, Pinal	88 min

Nearby

Flash Flood Warnings in Arizona, 2016 Every flash flood warning in 2016

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.