Alert archive / Arizona / Flash Flood Warnings in 2010
Flash Flood Warning 23, NWS Flagstaff, AZ
NWS Flagstaff, AZ issued this flash flood warning at Aug 2, 2010, 1:00 PM MST for Coconino County, Navajo County, Arizona. It was in force for 2 hr. No storm report in the archive falls inside the area while it was in force.
The area
The counties it named.
The facts
- Issued
- Aug 2, 2010, 1:00 PM MST (20:00 UTC)
- Expired
- Aug 2, 2010, 3:00 PM MST
- In force
- 2 hr
- Issued by
- NWS Flagstaff, AZ
- Area
- Storm-based polygon
- Flood severity
- None
Counties Coconino County, AZ, Navajo County, AZ
The radar
The Flagstaff radar (KFSX), 117 km from the middle of the area, began a volume at 20:02 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
Flgstf/Belemont, AZ (KFGZ), launched 12:00Z, 8.0 hours before the alert went out and 81 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.
- Mixed-layer CAPE
- 85 J/kg
- Mixed-layer CIN
- -50 J/kg
- Mixed-layer LCL
- 834 m above ground
- 0-6 km bulk shear
- 2 kt
- 0-1 km storm-relative helicity
- 55 m²/s²
- 0-3 km storm-relative helicity
- 97 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
What forecasters said that day
The local office's own words before this flash flood warning went out, as it sent them, from the Iowa Environmental Mesonet's archive of National Weather Service text.
NWS Flagstaff, AZ wrote its last area forecast discussion before this flash flood warning went out at Aug 2, 8:50 AM MST, 4 hours 10 minutes earlier.
Area forecast discussion, Aug 2, 8:50 AM MST, 4 hours 10 minutes before
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</html>Hazardous weather outlook, Aug 2, 9:16 AM MST, 3 hours 44 minutes before
HAZARDOUS WEATHER OUTLOOK NATIONAL WEATHER SERVICE FLAGSTAFF AZ 916 AM MST MON AUG 2 2010 AZZ004>018-037>040-030730- KAIBAB PLATEAU-MARBLE AND GLEN CANYONS-GRAND CANYON COUNTRY- COCONINO PLATEAU-YAVAPAI COUNTY MOUNTAINS- NORTHEAST PLATEAUS AND MESAS HWY 264 NORTHWARD-CHINLE VALLEY- CHUSKA MOUNTAINS AND DEFIANCE PLATEAU- LITTLE COLORADO RIVER VALLEY IN COCONINO COUNTY- LITTLE COLORADO RIVER VALLEY IN NAVAJO COUNTY- LITTLE COLORADO RIVER VALLEY IN APACHE COUNTY- WESTERN MOGOLLON RIM-EASTERN MOGOLLON RIM-WHITE MOUNTAINS- NORTHERN GILA COUNTY-YAVAPAI COUNTY VALLEYS AND BASINS- OAK CREEK AND SYCAMORE CANYONS-BLACK MESA AREA- NORTHEAST PLATEAUS AND MESAS SOUTH OF HWY 264- 916 AM MST MON AUG 2 2010 THIS HAZARDOUS WEATHER OUTLOOK IS FOR PORTIONS OF EAST CENTRAL ARIZONA...NORTH CENTRAL ARIZONA...NORTHEAST ARIZONA AND WEST CENTRAL ARIZONA. ...FLASH FLOOD WATCH IN EFFECT THROUGH THIS EVENING... .DAY ONE...TODAY EXPECT NUMEROUS RAIN SHOWERS AND THUNDERSTORMS TO DEVELOP WHEREVER GOOD SURFACE HEATING OCCURS. THE ONSET OF CONVECTION WILL BE DELAYED A BIT OVER A BROAD AREA EXTENDING FROM SOUTHWESTERN YAVAPAI COUNTY TO THE FOUR CORNERS DUE TO CLOUDINESS. STORM MOTION WILL GENERALLY BE FROM NORTH TO SOUTH...WEST OF A CAMP VERDE TO KAYENTA LINE. EAST OF THAT LINE...STORM MOTION WILL GENERALLY BE FROM SOUTH TO NORTH. THE GREATEST THREAT FROM TODAY'S STORMS WILL BE HEAVY PRECIPITATION AND POTENTIAL FLOODING. .DAYS TWO THROUGH SEVEN...TUESDAY THROUGH SUNDAY MOISTURE WILL DECREASE ONLY VERY SLOWLY OVER THE NEXT FEW DAYS. LOOK FOR A GRADUAL TRANSITION TO A MORE TYPICAL MONSOON PATTERN OF AFTERNOON AND EVENING SHOWERS AND THUNDERSTORMS. .SPOTTER INFORMATION STATEMENT... WEATHER SPOTTERS ARE ENCOURAGED TO REPORT SIGNIFICANT WEATHER CONDITIONS ACCORDING TO STANDARD OPERATING PROCEDURES. HOWARD
The office that day
Everything else NWS Flagstaff, AZ issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Aug 1, 6:08 PM MST | Areal Flood Advisory | FGZ | Apache, Navajo | 112 min |
| Aug 2, 2:43 AM MST | Flash Flood Watch | FGZ | Apache, Coconino, Gila, Navajo, Yavapai | 18 hr |
| Aug 2, 3:37 PM MST | Flash Flood Warning | FGZ | Yavapai | 105 min |
Nearby
Flash Flood Warnings in Arizona, 2010Every 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; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.