Alert archive / Arizona / Flash Flood Warnings in 2016

Flash Flood Warning 12, NWS Tucson, AZ

July 31, 2016Pima County, Arizona

NWS Tucson, AZ issued this flash flood warning at Jul 31, 2016, 10:17 PM MST for Pima County, Arizona. It was in force for 3 hr. 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, 10:17 PM MST (05:17 UTC)
Expired: Aug 1, 2016, 1:15 AM MST
In force: 3 hr
Issued by: NWS Tucson, AZ
Area: Storm-based polygon
Flood severity: None

County Pima County, AZ

The radar

The Tucson radar (KEMX), 28 km from the middle of the area, began a volume at 05:18 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, 5.3 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.

018 
WGUS55 KTWC 010517
FFWTWC
AZC019-010815-
/O.NEW.KTWC.FF.W.0012.160801T0517Z-160801T0815Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/

BULLETIN - EAS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE TUCSON AZ
1017 PM MST SUN JUL 31 2016

THE NATIONAL WEATHER SERVICE IN TUCSON HAS ISSUED A

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

* UNTIL 115 AM MST

* AT 1013 PM MST...DOPPLER RADAR INDICATED A LARGE AREA OF SHOWERS
  AND THUNDERSTORMS PRODUCING HEAVY RAIN ACROSS MUCH OF THE TUCSON
  METRO AREA. FLASH FLOODING IS EXPECTED TO BEGIN SHORTLY. RAINFALL
  AMOUNTS FROM BOTH AUTOMATED GAUGES AND WEATHER SPOTTERS INDICATE
  AMOUNTS OF 1 TO 2 INCHES WITH A TRAINED SPOTTER REPORTING NEARLY
  3.5 INCHES AT KOLB AND INTERSTATE 10.  

* SOME LOCATIONS THAT WILL EXPERIENCE FLOODING INCLUDE...
  TUCSON...ORO VALLEY...MARANA...GREEN VALLEY...SAHUARITA...
  FLOWING WELLS...TANQUE VERDE...DREXEL-ALVERNON...CASAS ADOBES...
  DREXEL HEIGHTS...TUCSON ESTATES...TORTOLITA...LITTLETOWN...
  VALENCIA WEST...THREE POINTS...EAST SAHUARITA...SUMMIT...
  AVRA VALLEY...SOUTH TUCSON AND REDINGTON.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

BE ESPECIALLY CAUTIOUS AT NIGHT WHEN IT IS HARDER TO RECOGNIZE THE
DANGERS OF FLOODING.

&&

LAT...LON 3174 11071 3172 11166 3250 11126 3251 11046
      3204 11046

$$

MOLLERE

2 follow-up statements

693 
WGUS75 KTWC 010644
FFSTWC

FLASH FLOOD STATEMENT
NATIONAL WEATHER SERVICE TUCSON AZ
1144 PM MST SUN JUL 31 2016

AZC019-010815-
/O.CON.KTWC.FF.W.0012.000000T0000Z-160801T0815Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
PIMA-
1144 PM MST SUN JUL 31 2016

...THE FLASH FLOOD WARNING REMAINS IN EFFECT UNTIL 115 AM MST FOR
NORTHEASTERN PIMA COUNTY...

AT 1137 PM MST...DOPPLER RADAR INDICATED THAT THE THUNDERSTORMS THAT
PRODUCED HEAVY RAIN ACROSS MUCH OF THE TUCSON METRO HAS MOVED WEST.
HOWEVER...EARLIER IN THE EVENING THESE STORMS PRODUCED WIDESPREAD
RAINFALL ACROSS NEARLY THE ENTIRE TUCSON METRO AND TOWARDS THE GREEN
VALLEY AREA. WIDESPREAD AMOUNTS OF A THIRD TO A HALF INCH
OCCURRED...WHILE AMOUNTS WELL IN EXCESS OF 1 INCH OCCURRED MOSTLY ON
THE SOUTH AND SOUTHEAST PORTIONS OF THE METRO...WITH A COUPLE OF
PLACES HAVING RECEIVED AROUND 3.5 INCHES. THAT SAID, THE WASHES WILL
CONTINUE TO BE SWOLLEN WITH WATER FOR ANOTHER HOUR AND A HALF...AT
LEAST. THIS MEANS THAT MANY ROADWAYS WILL EXPERIENCE WATER CROSSING
THE ROADWAYS. NEVER ATTEMPT TO GO AROUND BARRIERS OR TO CROSS A
ROADWAY COVERED WITH WATER.  

NORMALLY DRY WASHES AND LOW WATER CROSSINGS MAY BE INUNDATED IN THE
FOLLOWING LOCATIONS... TUCSON...ORO VALLEY...MARANA...GREEN
VALLEY...SAHUARITA...FLOWING WELLS... TANQUE VERDE...DREXEL-
ALVERNON...CASAS ADOBES...DREXEL HEIGHTS...TUCSON
ESTATES...TORTOLITA...LITTLETOWN...VALENCIA WEST...THREE
POINTS...EAST SAHUARITA...SUMMIT...AVRA VALLEY...SOUTH TUCSON AND
REDINGTON.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

BE ESPECIALLY CAUTIOUS AT NIGHT WHEN IT IS HARDER TO RECOGNIZE THE
DANGERS OF FLOODING.

&&

LAT...LON 3174 11071 3172 11166 3250 11126 3251 11046
      3204 11046

$$

MOLLERE

465 
WGUS75 KTWC 010807
FFSTWC

FLASH FLOOD STATEMENT
NATIONAL WEATHER SERVICE TUCSON AZ
107 AM MST MON AUG 1 2016

AZC019-010815-
/O.EXP.KTWC.FF.W.0012.000000T0000Z-160801T0815Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
PIMA-
107 AM MST MON AUG 1 2016

...THE FLASH FLOOD WARNING FOR NORTHEASTERN PIMA COUNTY WILL EXPIRE
AT 115 AM MST...

THE HEAVY RAIN HAS ENDED. HOWEVER...STREAMFLOW WILL CONTINUE THROUGH
THE EARLY MORNING HOURS IN AREA WASHES. PLEASE CONTINUE TO HEED ANY
REMAINING ROAD CLOSURES.

LAT...LON 3174 11071 3172 11166 3250 11126 3251 11046
      3204 11046

$$

GL

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, 9:06 PM MST	Flash Flood Warning	TWC	Pima	114 min
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.