Alert archive / Arizona / Flash Flood Warnings in 2011

Flash Flood Warning 4, NWS Flagstaff, AZ

July 4, 2011Apache County, Arizona

NWS Flagstaff, AZ issued this flash flood warning at Jul 4, 2011, 10:52 PM MST for Apache County, Arizona. It was in force for 45 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, 10:52 PM MST (05:52 UTC)
Expired: Jul 4, 2011, 11:37 PM MST
In force: 45 min
Issued by: NWS Flagstaff, AZ
Area: Storm-based polygon
Flood severity: None

County Apache County, AZ

The radar

The Flagstaff radar (KFSX), 173 km from the middle of the area, began a volume at 05:54 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, 5.9 hours before the alert went out and 242 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.

212 
WGUS55 KFGZ 050552
FFWFGZ
AZC001-050715-
/O.NEW.KFGZ.FF.W.0004.110705T0552Z-110705T0715Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/

BULLETIN - EAS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE FLAGSTAFF AZ
1052 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 1215 AM MST

* AT 1044 PM MST...LOCAL LAW ENFORCEMENT OFFICIALS IN GREER REPORTED 
  FLASH FLOODING AND DEBRIS FLOW ALONG BUTLER CREEK. FLOOD DEPTH IS  
  ESTIMATED AT ONE TO TWO FEET.  

* LOCATIONS IN THE WARNING INCLUDE BUT ARE NOT LIMITED TO GREER...BUTLER
  CREEK...EAST FORK OF THE LITTLE COLORADO RIVER

PRECAUTIONARY/PREPAREDNESS ACTIONS...

BE ESPECIALLY CAUTIOUS AT NIGHT WHEN IT IS HARDER TO RECOGNIZE THE
DANGERS OF FLOODING. IF FLASH FLOODING IS OBSERVED ACT QUICKLY. MOVE 
UP TO HIGHER GROUND TO ESCAPE FLOOD WATERS. 

&&

LAT...LON 3404 10945 3403 10941 3400 10943 3397 10946
      3399 10948

$$

41

1 follow-up statement

619 
WGUS75 KFGZ 050637
FFSFGZ

FLASH FLOOD STATEMENT
NATIONAL WEATHER SERVICE FLAGSTAFF AZ
1137 PM MST MON JUL 4 2011

AZC001-050646-
/O.CAN.KFGZ.FF.W.0004.000000T0000Z-110705T0715Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
APACHE AZ-
1137 PM MST MON JUL 4 2011

...THE FLASH FLOOD WARNING HAS BEEN CANCELLED FOR SOUTH CENTRAL
APACHE COUNTY...

AT 1130 PM MST...OFFICIALS IN GREER REPORT BUTLER CREEK WAS 
RECEDING. THUS THE FLASH FLOOD WARNING IS BEING CANCELLED. 

LAT...LON 3404 10945 3403 10941 3400 10943 3397 10946
      3399 10948

$$

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, 7:54 PM MST	Flash Flood Warning	FGZ	Apache	111 min
Jul 4, 9:49 PM MST	Flash Flood Warning	FGZ	Apache	56 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.