Alert archive / Arizona / Flash Flood Warnings in 2014

Flash Flood Warning 13, NWS Tucson, AZ

July 13, 2014Pima County, Arizona

NWS Tucson, AZ issued this flash flood warning at Jul 13, 2014, 7:24 PM MST for Pima County, Arizona. It was in force for 96 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 13, 2014, 7:24 PM MST (02:24 UTC)
Expired: Jul 13, 2014, 9:00 PM MST
In force: 96 min
Issued by: NWS Tucson, AZ
Area: Storm-based polygon
Flood severity: None

County Pima County, AZ

The radar

The Tucson radar (KEMX), 51 km from the middle of the area, began a volume at 02:27 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 00:00Z, 2.4 hours before the alert went out and 34 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: 565 J/kg
Mixed-layer CIN: -35 J/kg
Mixed-layer LCL: 2893 m above ground
0-6 km bulk shear: 24 kt
0-1 km storm-relative helicity: -9 m²/s²
0-3 km storm-relative helicity: 23 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.9

Open this sounding in Storm Lab

The text

As transmitted, in the capitals the NWS used until 2016.

828 
WGUS55 KTWC 140224
FFWTWC
AZC019-140400-
/O.NEW.KTWC.FF.W.0013.140714T0224Z-140714T0400Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/

BULLETIN - EAS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE TUCSON AZ
724 PM MST SUN JUL 13 2014

THE NATIONAL WEATHER SERVICE IN TUCSON HAS ISSUED A

* FLASH FLOOD WARNING FOR...
  CENTRAL PIMA COUNTY IN SOUTHEAST ARIZONA...
  THIS INCLUDES THE CITY OF GREEN VALLEY AND THREE POINTS...

* UNTIL 900 PM MST

* AT 717 PM MST...NATIONAL WEATHER SERVICE METEOROLOGISTS INDICATED  
  HEAVY RAINFALL FROM STRONG THUNDERSTORMS CAPABLE OF PRODUCING      
  FLASH FLOODING OVER THE WARNED AREA.

* LOCATIONS IN THE WARNING INCLUDE BUT ARE NOT LIMITED TO THREE      
  POINTS...GREEN VALLEY AND INTERSTATE 19 BETWEEN TUCSON AND GREEN   
  VALLEY.

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.

DO NOT DRIVE YOUR VEHICLE INTO AREAS WHERE THE WATER COVERS THE 
ROADWAY. THE WATER DEPTH MAY BE TOO GREAT TO ALLOW YOUR CAR TO CROSS 
SAFELY. FIND AN ALTERNATE ROUTE OR AVOID TRAVEL IF POSSIBLE.

&&

LAT...LON 3205 11143 3219 11107 3203 11090 3199 11096
      3173 11096 3174 11141

$$

JJB

2 follow-up statements

180 
WGUS75 KTWC 140332
FFSTWC

FLASH FLOOD STATEMENT
NATIONAL WEATHER SERVICE TUCSON AZ
832 PM MST SUN JUL 13 2014

AZC019-140400-
/O.CON.KTWC.FF.W.0013.000000T0000Z-140714T0400Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
PIMA AZ-
832 PM MST SUN JUL 13 2014

...A FLASH FLOOD WARNING REMAINS IN EFFECT UNTIL 900 PM MST FOR
CENTRAL PIMA COUNTY...

AT 819 PM MST...NATIONAL WEATHER SERVICE METEOROLOGISTS CONTINUED TO 
MONITOR MODERATE TO HEAVY RAINFALL IN THE WARNED AREA. 

TRAINED WEATHER SPOTTERS IN THE GREEN VALLEY AREA REPORTED RAINFALL 
AMOUNTS IN EXCESS OF TWO INCHES. SPOTTERS ALSO INDICATED MINOR 
FLOODING OF ROADS IN THE GREEN VALLEY AREA. RADAR ESTIMATES ALSO 
SHOWED SOME LOCATIONS AROUND GREEN VALLEY WITH OVER TWO INCHES OF 
RAINFALL.

LOCATIONS IN THE WARNING INCLUDE BUT ARE NOT LIMITED TO GREEN 
VALLEY...THREE POINTS AND INTERSTATE 19.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

BE ESPECIALLY CAUTIOUS AT NIGHT WHEN IT IS HARDER TO RECOGNIZE THE 
DANGERS OF FLOODING. DO NOT STAY IN AREAS SUBJECT TO FLOODING WHEN 
WATER BEGINS RISING.

DO NOT DRIVE YOUR VEHICLE INTO AREAS WHERE THE WATER COVERS THE
ROADWAY. THE WATER DEPTH MAY BE TOO GREAT TO ALLOW YOUR CAR TO CROSS
SAFELY.

&&

LAT...LON 3205 11143 3219 11107 3203 11090 3199 11096
      3173 11096 3174 11141

$$

JJB

367 
WGUS75 KTWC 140351
FFSTWC

FLASH FLOOD STATEMENT
NATIONAL WEATHER SERVICE TUCSON AZ
851 PM MST SUN JUL 13 2014

AZC019-140401-
/O.EXP.KTWC.FF.W.0013.000000T0000Z-140714T0400Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
PIMA AZ-
851 PM MST SUN JUL 13 2014

...THE FLASH FLOOD WARNING WILL EXPIRE AT 900 PM MST FOR CENTRAL PIMA
COUNTY...

THE AREAS OF HEAVY RAINFALL LEADING TO FLASH FLOODING HAVE MOVED OUT 
OF THE WARNED AREA.

HOWEVER...SOME LOCATIONS...SUCH AS ROADWAYS...WASHES AND 
UNDERPASSES...MAY STILL EXPERIENCE LOCALIZED FLOODING THIS EVENING. 
REMAIN VIGILANT AND DO NOT DRIVE THROUGH FLOODED AREAS ESPECIALLY AT 
NIGHT WHEN YOU MAY NOT KNOW THE DEPTH OF THE WATER.

LAT...LON 3205 11143 3219 11107 3203 11090 3199 11096
      3173 11096 3174 11141

$$

JJB

The office that day

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

Issued	Product	Office	Counties	Lasted
Jul 13, 5:13 PM MST	Areal Flood Advisory	TWC	Pima	92 min
Jul 13, 5:18 PM MST	Blowing Dust Advisory	TWC	Pima, Pinal	90 min
Jul 13, 5:55 PM MST	Severe Thunderstorm Warning	TWC	Pima	35 min
Jul 13, 6:15 PM MST	Flash Flood Warning	TWC	Pima	2 hr
Jul 13, 6:15 PM MST	Severe Thunderstorm Warning	TWC	Pima, Santa Cruz	30 min
Jul 13, 6:42 PM MST	Flash Flood Warning	TWC	Pima	2 hr
Jul 13, 7:07 PM MST	Severe Thunderstorm Warning	TWC	Pima	23 min
Jul 13, 8:08 PM MST	Areal Flood Advisory	TWC	Pima	3 hr
Jul 13, 8:20 PM MST	Areal Flood Advisory	TWC	Pima, Pinal	3 hr
Jul 14, 2:25 PM MST	Special Weather Statement	TWC	Graham	50 min
Jul 14, 3:32 PM MST	Severe Thunderstorm Warning	TWC	Pima, Pinal	28 min
Jul 14, 3:49 PM MST	Severe Thunderstorm Warning	TWC	Graham	26 min
Jul 14, 4:13 PM MST	Special Weather Statement	TWC	Graham	47 min
Jul 14, 4:26 PM MST	Severe Thunderstorm Warning	TWC	Pima	34 min

Nearby

Flash Flood Warnings in Arizona, 2014 Every flash flood warning in 2014

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.