Alert archive / Arizona / Flash Flood Warnings in 2012
Flash Flood Warning 7, NWS Flagstaff, AZ
NWS Flagstaff, AZ issued this flash flood warning at Jul 20, 2012, 3:40 PM MST for Coconino County, Arizona. It was in force for 95 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 20, 2012, 3:40 PM MST (22:40 UTC)
- Expired
- Jul 20, 2012, 5:15 PM MST
- In force
- 95 min
- Issued by
- NWS Flagstaff, AZ
- Area
- Storm-based polygon
- Flood severity
- None
County Coconino County, AZ
The radar
The Cedar City radar (KICX), 152 km from the middle of the area, began a volume at 22:42 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, 10.7 hours before the alert went out and 187 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
- 110 J/kg
- Mixed-layer CIN
- -130 J/kg
- Mixed-layer LCL
- 1736 m above ground
- 0-6 km bulk shear
- 18 kt
- 0-1 km storm-relative helicity
- 5 m²/s²
- 0-3 km storm-relative helicity
- 44 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted, in the capitals the NWS used until 2016.
818 WGUS55 KFGZ 202240 FFWFGZ AZC005-210015- /O.NEW.KFGZ.FF.W.0007.120720T2240Z-120721T0015Z/ /00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/ BULLETIN - EAS ACTIVATION REQUESTED FLASH FLOOD WARNING NATIONAL WEATHER SERVICE FLAGSTAFF AZ 340 PM MST FRI JUL 20 2012 THE NATIONAL WEATHER SERVICE IN FLAGSTAFF HAS ISSUED A * FLASH FLOOD WARNING FOR... NORTH CENTRAL COCONINO COUNTY IN NORTH CENTRAL ARIZONA... THIS INCLUDES ANTELOPE CANYON NEAR STATE ROUTE 98... * UNTIL 515 PM MST * AT 331 PM MST...NATIONAL WEATHER SERVICE RADAR INDICATED A THUNDERSTORM PRODUCING HEAVY RAINFALL IN THE ANTELOPE CANYON DRAINAGE. FLASH FLOODING IS LIKELY IN ANTELOPE CANYON. * LOCATIONS IN THE WARNING INCLUDE BUT ARE NOT LIMITED ANTELOPE CANYON...LE CHEE. PRECAUTIONARY/PREPAREDNESS ACTIONS... A FLASH FLOOD WARNING MEANS THAT FLOODING IS IMMINENT OR OCCURRING. IF YOU ARE IN THE WARNING AREA MOVE TO HIGHER GROUND IMMEDIATELY. RESIDENTS LIVING ALONG STREAMS AND CREEKS SHOULD TAKE IMMEDIATE PRECAUTIONS TO PROTECT LIFE AND PROPERTY. DO NOT ATTEMPT TO CROSS SWIFTLY FLOWING WATERS OR WATERS OF UNKNOWN DEPTH BY FOOT OR BY AUTOMOBILE. && LAT...LON 3694 11145 3694 11136 3678 11130 3679 11144 $$ JJ
2 follow-up statements
588 WGUS75 KFGZ 202341 FFSFGZ FLASH FLOOD STATEMENT NATIONAL WEATHER SERVICE FLAGSTAFF AZ 441 PM MST FRI JUL 20 2012 AZC005-210015- /O.CON.KFGZ.FF.W.0007.000000T0000Z-120721T0015Z/ /00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/ COCONINO AZ- 441 PM MST FRI JUL 20 2012 ...A FLASH FLOOD WARNING REMAINS IN EFFECT UNTIL 515 PM MST FOR NORTH CENTRAL COCONINO COUNTY... AT 433 PM MST...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED ADDITIONAL SHOWERS DEVELOPING OVER THE ANTELOPE CANYON DRAINAGE. RAINFALL ESTIMATES FROM EARLIER STORMS RANGED UP TO ONE INCH WHICH WILL CAUSE FLOODING IN ANTELOPE CANYON. LOCATIONS IN THE WARNING INCLUDE ANTELOPE CANYON NEAR STATE ROUTE 98. PRECAUTIONARY/PREPAREDNESS ACTIONS... A FLASH FLOOD WARNING MEANS THAT FLOODING IS IMMINENT OR OCCURRING. IF YOU ARE IN THE WARNING AREA MOVE TO HIGHER GROUND IMMEDIATELY. RESIDENTS LIVING ALONG STREAMS AND CREEKS SHOULD TAKE IMMEDIATE PRECAUTIONS TO PROTECT LIFE AND PROPERTY. DO NOT ATTEMPT TO CROSS SWIFTLY FLOWING WATERS OR WATERS OF UNKNOWN DEPTH BY FOOT OR BY AUTOMOBILE. && LAT...LON 3694 11145 3694 11136 3678 11130 3679 11144 $$ JJ
887 WGUS75 KFGZ 210014 FFSFGZ FLASH FLOOD STATEMENT NATIONAL WEATHER SERVICE FLAGSTAFF AZ 514 PM MST FRI JUL 20 2012 AZC005-210021- /O.EXP.KFGZ.FF.W.0007.000000T0000Z-120721T0015Z/ /00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/ COCONINO AZ- 514 PM MST FRI JUL 20 2012 ...THE FLASH FLOOD WARNING WILL EXPIRE AT 515 PM MST FOR NORTH CENTRAL COCONINO COUNTY... HEAVY RAIN HAS ENDED ACROSS THE ANTELOPE CANYON DRAINAGE. STORM RUNOFF SHOULD CONTINUE FOR ANOTHER ONE TO TWO HOURS...AND PEOPLE IN THIS AREA SHOULD KEEP OUT OF SLOT CANYONS THIS EVENING. LAT...LON 3694 11145 3694 11136 3678 11130 3679 11144 $$ JJ
The office that day
Everything else NWS Flagstaff, AZ issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jul 20, 11:34 AM MST | Special Weather Statement | FGZ | 26 min | |
| Jul 20, 12:03 PM MST | Areal Flood Advisory | FGZ | Apache, Navajo | 117 min |
| Jul 20, 1:27 PM MST | Special Weather Statement | FGZ | Coconino | 48 min |
Nearby
Flash Flood Warnings in Arizona, 2012Every flash flood warning in 2012
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.