Alert archive / Arizona / Flash Flood Warnings in 2011

Flash Flood Warning 2, NWS Flagstaff, AZ

July 4, 2011Apache County, Arizona

NWS Flagstaff, AZ issued this flash flood warning at Jul 4, 2011, 7:54 PM MST for Apache County, Arizona. It was in force for 111 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 4, 2011, 7:54 PM MST (02:54 UTC)
Expired: Jul 4, 2011, 9:45 PM MST
In force: 111 min
Issued by: NWS Flagstaff, AZ
Area: Storm-based polygon
Flood severity: None

County Apache County, AZ

The radar

The Flagstaff radar (KFSX), 172 km from the middle of the area, began a volume at 02:55 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

Phoenix, AZ (KPSR), launched 00:00Z, 2.9 hours before the alert went out and 243 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: -121 J/kg
Mixed-layer LCL: 2268 m above ground
0-6 km bulk shear: 31 kt
0-1 km storm-relative helicity: 11 m²/s²
0-3 km storm-relative helicity: 71 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.

113 
WGUS55 KFGZ 050254
FFWFGZ
AZC001-050445-
/O.NEW.KFGZ.FF.W.0002.110705T0254Z-110705T0445Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/

BULLETIN - EAS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE FLAGSTAFF AZ
754 PM MST MON JUL 4 2011

THE NATIONAL WEATHER SERVICE IN FLAGSTAFF HAS ISSUED A

* FLASH FLOOD WARNING FOR...
  SOUTH CENTRAL APACHE COUNTY IN NORTHEAST ARIZONA...

* UNTIL 945 PM MST

* AT 746 PM MST...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED   
FLASH FLOODING FROM A THUNDERSTORM OVER THE WARNED AREA. THE WARNED 
AREA INCLUDES GREER...INCLUDING COON AND HOBSON CANYONS. 

AUTOMATED RAIN GAGES IN THE GREER AREA REPORTED .25 INCHES FALLING 
IN 10 MINUTES WITH STRONG THUNDERSTORMS OVERHEAD. 

PRECAUTIONARY/PREPAREDNESS ACTIONS...

TO REPORT FLOODING...HAVE THE NEAREST LAW ENFORCEMENT AGENCY RELAY
YOUR REPORT TO THE NATIONAL WEATHER SERVICE FORECAST OFFICE IN
FLAGSTAFF.

&&

LAT...LON 3400 10950 3408 10944 3407 10936 3396 10943

$$

41

2 follow-up statements

785 
WGUS75 KFGZ 050350
FFSFGZ

FLASH FLOOD STATEMENT
NATIONAL WEATHER SERVICE FLAGSTAFF AZ
850 PM MST MON JUL 4 2011

AZC001-050445-
/O.CON.KFGZ.FF.W.0002.000000T0000Z-110705T0445Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
APACHE AZ-
850 PM MST MON JUL 4 2011

...A FLASH FLOOD WARNING REMAINS IN EFFECT UNTIL 945 PM MST FOR SOUTH
CENTRAL APACHE COUNTY...

AT 850 PM MST...THIS FLASH FLOOD WARNING IS FOR THE SOUTH FORK OF 
THE LITTLE COLORADO RIVER BETWEEN GREER AND EAGER AS WELL AS HOBSON 
AND COON CREEKS. THE FLASH FLOOD WARNING WILL CONTINUE THROUGH 945 
PM MST AS RUNOFF MOVES THROUGH THESE DRAINAGES.

AUTOMATED RAIN GAGES IN THIS AREA MEASURED 0.70 OF AN INCH OF RAIN 
IN 25 MINUTES ENDING AT 800 PM.  LOCAL LAW OFFICIALS REPORTED LOW 
WATER CROSSING HAD FILLED ALONG THE WEST FORK ROAD BUT WERE NOW 
RECEDING. NO FLOODING ISSUES WERE REPORTED IN GREER. DOPPLER RADAR 
INDICATED ONLY LIGHT ADDITIONAL RAINFALL OVER THE AREA. 

LAT...LON 3400 10950 3408 10944 3407 10936 3396 10943

$$

240 
WGUS75 KFGZ 050418
FFSFGZ

FLASH FLOOD STATEMENT
NATIONAL WEATHER SERVICE FLAGSTAFF AZ
918 PM MST MON JUL 4 2011

AZC001-050445-
/O.CON.KFGZ.FF.W.0002.000000T0000Z-110705T0445Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
APACHE AZ-
918 PM MST MON JUL 4 2011

...A FLASH FLOOD WARNING REMAINS IN EFFECT UNTIL 945 PM MST FOR SOUTH
CENTRAL APACHE COUNTY...

AT 911 PM MST...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED NEW 
THUNDERSTORMS WERE MOVING TOWARDS THE GREER AREA. THESE STORMS ARE 
MOVING TO THE WEST ABOUT 15 MPH...AND WILL PRODUCE LOCALLY HEAVY 
RAIN.  

THIS FLASH FLOOD WARNING IS FOR THE SOUTH FORK OF THE LITTLE 
COLORADO RIVER BETWEEN GREER AND EAGER AS WELL AS HOBSON AND COON 
CREEKS. THE FLASH FLOOD WARNING WILL CONTINUE THROUGH 945 PM MST AS 
RUNOFF MOVES THROUGH THESE DRAINAGES.

AUTOMATED RAIN GAGES IN THIS AREA MEASURED 0.70 OF AN INCH OF RAIN 
IN 25 MINUTES ENDING AT 800 PM. LOCAL LAW OFFICIALS REPORTED LOW 
WATER CROSSING HAD FILLED ALONG THE EAST FORK ROAD BUT WERE NOW 
RECEDING. 

LAT...LON 3400 10950 3408 10944 3407 10936 3396 10943

$$

41

The office that day

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

Issued	Product	Office	Counties	Lasted
Jul 4, 5:33 PM MST	Special Weather Statement	FGZ	Gila	42 min
Jul 4, 5:51 PM MST	Severe Thunderstorm Warning	FGZ	Gila	24 min
Jul 4, 6:44 PM MST	Severe Thunderstorm Warning	FGZ	Yavapai	31 min
Jul 4, 6:50 PM MST	Severe Thunderstorm Warning	FGZ	Yavapai	25 min
Jul 4, 9:49 PM MST	Flash Flood Warning	FGZ	Apache	56 min
Jul 4, 10:52 PM MST	Flash Flood Warning	FGZ	Apache	45 min
Jul 5, 1:07 PM MST	Areal Flood Advisory	FGZ	Yavapai	83 min
Jul 5, 3:00 PM MST	Areal Flood Advisory	FGZ	Yavapai	90 min

Nearby

Flash Flood Warnings in Arizona, 2011 Every flash flood warning in 2011

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.