Alert archive / Arizona / Flash Flood Warnings in 2014

Flash Flood Warning 5, NWS Tucson, AZ

July 7, 2014Pima County, Arizona

NWS Tucson, AZ issued this flash flood warning at Jul 7, 2014, 2:12 PM MST for Pima County, Arizona. It was in force for 2 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 7, 2014, 2:12 PM MST (21:12 UTC)
Expired: Jul 7, 2014, 4:15 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), 20 km from the middle of the area, began a volume at 21:15 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 7, 3:05 PM MST	FLASH FLOOD	Corona De Tucson, AZ	FLASH FLOOD AT SAHUARITA ROAD AND HOUGHTON ROAD.

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 12:00Z, 9.2 hours before the alert went out and 21 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: 253 J/kg
Mixed-layer CIN: -64 J/kg
Mixed-layer LCL: 1603 m above ground
0-6 km bulk shear: 20 kt
0-1 km storm-relative helicity: 36 m²/s²
0-3 km storm-relative helicity: 38 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.1

Open this sounding in Storm Lab

The text

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

951 
WGUS55 KTWC 072112
FFWTWC
AZC019-072315-
/O.NEW.KTWC.FF.W.0005.140707T2112Z-140707T2315Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/

BULLETIN - EAS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE TUCSON AZ
212 PM MST MON JUL 7 2014

THE NATIONAL WEATHER SERVICE IN TUCSON HAS ISSUED A

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

* UNTIL 415 PM MST

* AT 205 PM MST...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED   
  FLASH FLOODING FROM A THUNDERSTORM OVER THE WARNED AREA. A TRAINED 
  SPOTTER REPORTED 1.5 INCHES OF RAINFALL IN 15 MINUTES IN CORONA DE 
  TUCSON. THIS WILL RESULT IN FLASH FLOODING. 

* LOCATIONS IN THE WARNING INCLUDE BUT ARE NOT LIMITED TO CORONA DE
  TUCSON...VAIL AND RITA RANCH

PRECAUTIONARY/PREPAREDNESS ACTIONS...

EXCESSIVE RUNOFF FROM HEAVY RAINFALL WILL CAUSE FLOODING OF SMALL
CREEKS AND STREAMS...HIGHWAYS AND UNDERPASSES. ADDITIONALLY...COUNTRY
ROADS AND FARMLANDS ALONG THE BANKS OF CREEKS...STREAMS AND OTHER LOW
LYING AREAS ARE SUBJECT TO FLOODING.

&&

LAT...LON 3206 11089 3213 11075 3204 11065 3185 11071
      3185 11096

$$

GL

3 follow-up statements

360 
WGUS75 KTWC 072130
FFSTWC

FLASH FLOOD STATEMENT
NATIONAL WEATHER SERVICE TUCSON AZ
230 PM MST MON JUL 7 2014

AZC019-072315-
/O.CON.KTWC.FF.W.0005.000000T0000Z-140707T2315Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
PIMA AZ-
230 PM MST MON JUL 7 2014

...A FLASH FLOOD WARNING REMAINS IN EFFECT UNTIL 415 PM MST FOR EAST
CENTRAL PIMA COUNTY...

AT 220 PM MST...NATIONAL WEATHER SERVICE DOPPLER RADAR CONTINUED TO 
INDICATE A THUNDERSTORM PRODUCING FLASH FLOODING IN THE CORONA DE 
TUCSON AREA. AN AUTOMATED RAIN GAUGE IN CORONA DE TUCSON HAS 
RECORDED 1.65 INCHES OF RAINFALL...MOSTLY IN THE LAST 30 MINUTES.
THIS IS PRODUCING FLASH FLOODING ALONG BOTH HOUGHTON ROAD AND 
SAHUARITA ROADS AS FLOODING IS OCCURRING IN SMALL WASHES. 

LOCATIONS IN THE WARNING INCLUDE BUT ARE NOT LIMITED TO VAIL

PRECAUTIONARY/PREPAREDNESS ACTIONS...

EXCESSIVE RUNOFF FROM HEAVY RAINFALL WILL CAUSE FLOODING OF SMALL
CREEKS AND STREAMS...HIGHWAYS AND UNDERPASSES. ADDITIONALLY...COUNTRY
ROADS AND FARMLANDS ALONG THE BANKS OF CREEKS...STREAMS AND OTHER LOW
LYING AREAS ARE SUBJECT TO FLOODING.

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 3206 11089 3213 11075 3204 11065 3185 11071
      3185 11096

$$

GL

633 
WGUS75 KTWC 072216
FFSTWC

FLASH FLOOD STATEMENT
NATIONAL WEATHER SERVICE TUCSON AZ
316 PM MST MON JUL 7 2014

AZC019-072315-
/O.CON.KTWC.FF.W.0005.000000T0000Z-140707T2315Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
PIMA AZ-
316 PM MST MON JUL 7 2014

...A FLASH FLOOD WARNING REMAINS IN EFFECT UNTIL 415 PM MST FOR EAST
CENTRAL PIMA COUNTY...

AT 307 PM MST...FLASH FLOODING WAS OCCURRING IN THE CORONA DE TUCSON 
AREA ALONG HOUGHTON ROAD AND SAHUARITA ROAD AFTER RAINFALL IN EXCESS 
OF 2 INCHES OCCURRED. EXPECT FLASH FLOODING TO CONTINUE IN THIS AREA 
ALTHOUGH RAINFALL RATES ARE GRADUALLY SUBSIDING. 

LOCATIONS IN THE WARNING INCLUDE BUT ARE NOT LIMITED TO VAIL

PRECAUTIONARY/PREPAREDNESS ACTIONS...

EXCESSIVE RUNOFF FROM HEAVY RAINFALL WILL CAUSE FLOODING OF SMALL
CREEKS AND STREAMS...HIGHWAYS AND UNDERPASSES. ADDITIONALLY...COUNTRY
ROADS AND FARMLANDS ALONG THE BANKS OF CREEKS...STREAMS AND OTHER LOW
LYING AREAS ARE SUBJECT TO FLOODING.

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 3206 11089 3213 11075 3204 11065 3185 11071
      3185 11096

$$

GL

776 
WGUS75 KTWC 072311
FFSTWC

FLASH FLOOD STATEMENT
NATIONAL WEATHER SERVICE TUCSON AZ
411 PM MST MON JUL 7 2014

AZC019-072320-
/O.EXP.KTWC.FF.W.0005.000000T0000Z-140707T2315Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
PIMA AZ-
411 PM MST MON JUL 7 2014

...THE FLASH FLOOD WARNING WILL EXPIRE AT 415 PM MST FOR EAST CENTRAL
PIMA COUNTY...

FLASH FLOODING IN THE CORONA DE TUCSON AREA HAS SUBSIDED...THUS THE 
FLASH FLOOD WARNING WILL BE ALLOWED TO EXPIRE. HOWEVER...AREA WASHES
WILL REMAIN FLOWING INTO THIS EVENING. 

LAT...LON 3206 11089 3213 11075 3204 11065 3185 11071
      3185 11096

$$

GL

The office that day

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

Issued	Product	Office	Counties	Lasted
Jul 7, 11:01 AM MST	Severe Thunderstorm Warning	TWC	Santa Cruz	29 min
Jul 7, 11:29 AM MST	Special Weather Statement	TWC	Santa Cruz	46 min
Jul 7, 12:33 PM MST	Severe Thunderstorm Warning	TWC	Pima	42 min
Jul 7, 12:54 PM MST	Flash Flood Warning	TWC	Santa Cruz	3 hr
Jul 7, 1:17 PM MST	Special Weather Statement	TWC		43 min
Jul 7, 1:45 PM MST	Areal Flood Advisory	TWC	Pima	2 hr
Jul 7, 2:58 PM MST	Areal Flood Advisory	TWC	Cochise	2 hr
Jul 7, 4:16 PM MST	Special Weather Statement	TWC	Greenlee	44 min
Jul 7, 4:38 PM MST	Dust Storm Warning	TWC	Cochise	82 min
Jul 7, 4:58 PM MST	Severe Thunderstorm Warning	TWC	Graham	62 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; local storm reports from the same archive; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.