Alert archive / Arizona / Flash Flood Warnings in 2010

Flash Flood Warning 21, NWS Flagstaff, AZ

July 31, 2010Apache County, Navajo County, Arizona

NWS Flagstaff, AZ issued this flash flood warning at Jul 31, 2010, 8:41 PM MST for Apache County, Navajo 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, 2010, 8:41 PM MST (03:41 UTC)
Expired: Jul 31, 2010, 11:30 PM MST
In force: 3 hr
Issued by: NWS Flagstaff, AZ
Area: Storm-based polygon
Flood severity: None

Counties Apache County, AZ, Navajo County, AZ

The radar

The Flagstaff radar (KFSX), 164 km from the middle of the area, began a volume at 03:41 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, 8:45 PM MST	FLASH FLOOD	7 S Klagetoh, AZ	NAVAJO NATION PD REPORTS WATER FROM WIDE RUIN WASH ACROSS HWY 191 AT MM 390. TRAFFIC STOPPED

Local storm reports filed while the alert was in force, from inside its polygon or its counties.

The nearest sounding before it

Flgstf/Belemont, AZ (KFGZ), launched 00:00Z, 3.7 hours before the alert went out and 188 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: 234 J/kg
Mixed-layer CIN: 0 J/kg
Mixed-layer LCL: 655 m above ground
0-6 km bulk shear: 1 kt
0-1 km storm-relative helicity: -34 m²/s²
0-3 km storm-relative helicity: 5 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

Open this sounding in Storm Lab

The text

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

693 
WGUS55 KFGZ 010341
FFWFGZ
AZC001-017-010630-
/O.NEW.KFGZ.FF.W.0021.100801T0341Z-100801T0630Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/

BULLETIN - EAS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE FLAGSTAFF AZ
841 PM MST SAT JUL 31 2010

THE NATIONAL WEATHER SERVICE IN FLAGSTAFF HAS ISSUED A

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

* UNTIL 1130 PM MST

* AT 832 PM MST...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED
  FLASH FLOODING FROM A THUNDERSTORM OVER THE WARNED AREA.

* LOCATIONS IN THE WARNING INCLUDE BUT ARE NOT LIMITED TO WIDE 
RUINS...GREASEWOOD...HIGHWAY 191 NEAR WIDE RUINS...ROUTE 15 SOUTH OF 
GREASEWOOD...AND AREAS ALONG AND NEAR THE PUEBLO COLORADO WASH.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

EXCESSIVE RUNOFF FROM HEAVY RAINFALL WILL CAUSE FLOODING OF SMALL
CREEKS AND STREAMS...COUNTRY ROADS...AS WELL AS FARMLAND ALONG THE
BANKS OF CREEKS AND STREAMS.

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. DO NOT STAY IN AREAS
SUBJECT TO FLOODING WHEN WATER BEGINS RISING.

&&

LAT...LON 3553 11001 3553 10969 3541 10940 3528 10940
      3538 10997

$$

BAK

2 follow-up statements

778 
WGUS75 KFGZ 010415
FFSFGZ

FLASH FLOOD STATEMENT
NATIONAL WEATHER SERVICE FLAGSTAFF AZ
915 PM MST SAT JUL 31 2010

AZC001-017-010630-
/O.CON.KFGZ.FF.W.0021.000000T0000Z-100801T0630Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
NAVAJO AZ-APACHE AZ-
915 PM MST SAT JUL 31 2010

...A FLASH FLOOD WARNING REMAINS IN EFFECT UNTIL 1130 PM MST FOR
CENTRAL APACHE AND EAST CENTRAL NAVAJO COUNTIES...

AT 904 PM MST...NATIONAL WEATHER SERVICE DOPPLER RADAR HAS INDICATED 
THAT IN EXCESS OF THREE INCHES OF RAIN HAS FALLEN IN THE WARNED 
AREA...PRIMARILY IN THE PUEBLO COLORADO...STEAMBOAT...AND WIDE RUIN 
WASH DRAINAGES SOUTH OF GREASEWOOD AND NEAR WIDE RUIN. HIGHWAY 191 
NEAR MM 390 HAS BEEN CLOSED DUE TO FLOOD WATERS. MODERATE RAIN WILL 
CONTINUE TO FALL ACROSS THE AREA THROUGH 940 PM MST.

LOCATIONS IN THE WARNING INCLUDE BUT ARE NOT LIMITED RURAL AREAS 
SOUTH OF GREASEWOOD...WIDE RUIN...THE PUEBLO COLORADO 
WASH...STEAMBOAT WASH...AND WIDE RUIN WASH.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

EXCESSIVE RUNOFF FROM HEAVY RAINFALL WILL CAUSE FLOODING OF SMALL
CREEKS AND STREAMS...COUNTRY ROADS...AS WELL AS FARMLAND ALONG THE
BANKS OF CREEKS AND STREAMS.

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. DO NOT STAY IN AREAS
SUBJECT TO FLOODING WHEN WATER BEGINS RISING.

&&

LAT...LON 3553 11001 3553 10969 3541 10940 3528 10940
      3538 10997

$$
BAK

414 
WGUS75 KFGZ 010629
FFSFGZ

FLASH FLOOD STATEMENT
NATIONAL WEATHER SERVICE FLAGSTAFF AZ
1129 PM MST SAT JUL 31 2010

AZC001-017-010634-
/O.EXP.KFGZ.FF.W.0021.000000T0000Z-100801T0630Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
NAVAJO AZ-APACHE AZ-
1129 PM MST SAT JUL 31 2010

...THE FLASH FLOOD WARNING WILL EXPIRE AT 1130 PM MST FOR CENTRAL
APACHE AND EAST CENTRAL NAVAJO COUNTIES...

DOPPLER RADAR INDICATED THE HEAVY RAINFALL ENDED IN THE WARNING AREA 
AROUND 930 PM. WATER IN THE WIDE RUINS AND GREASEWOOD SPRINGS AREAS 
AS WELL AS THE PUEBLO COLORADO WASH ARE EXPECTED TO RECEDE QUICKLY 
THROUGH EARLY SUNDAY MORNING. 

LAT...LON 3553 11001 3553 10969 3541 10940 3528 10940
      3538 10997

$$

41

The office that day

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

Issued	Product	Office	Counties	Lasted
Jul 31, 5:45 PM MST	Areal Flood Advisory	FGZ	Apache, Navajo	2 hr
Jul 31, 6:39 PM MST	Flash Flood Warning	FGZ	Apache	111 min
Jul 31, 8:15 PM MST	Areal Flood Advisory	FGZ	Coconino, Yavapai	3 hr
Jul 31, 9:48 PM MST	Areal Flood Advisory	FGZ	Coconino	6 hr
Aug 1, 2:45 AM MST	Flash Flood Watch	FGZ	Apache, Coconino, Gila, Navajo, Yavapai	18 hr
Aug 1, 9:42 AM MST	Areal Flood Advisory	FGZ	Coconino	3 hr
Aug 1, 1:03 PM MST	Areal Flood Advisory	FGZ	Coconino	3 hr
Aug 1, 2:44 PM MST	Flash Flood Warning	FGZ	Navajo	91 min

Nearby

Flash Flood Warnings in Arizona, 2010 Every flash flood warning in 2010

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.