Alert archive / Arizona / Flash Flood Warnings in 2012
Flash Flood Warning 36, NWS Flagstaff, AZ
NWS Flagstaff, AZ issued this flash flood warning at Sep 1, 2012, 2:53 PM MST for Coconino County, Arizona. It was in force for 112 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
- Sep 1, 2012, 2:53 PM MST (21:53 UTC)
- Expired
- Sep 1, 2012, 4:45 PM MST
- In force
- 112 min
- Issued by
- NWS Flagstaff, AZ
- Area
- Storm-based polygon
- Flood severity
- None
County Coconino County, AZ
The radar
The Cedar City radar (KICX), 149 km from the middle of the area, began a volume at 21:55 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
Flgstf/Belemont, AZ (KFGZ), launched 12:00Z, 9.9 hours before the alert went out and 189 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
- 325 J/kg
- Mixed-layer CIN
- -86 J/kg
- Mixed-layer LCL
- 1111 m above ground
- 0-6 km bulk shear
- 29 kt
- 0-1 km storm-relative helicity
- 102 m²/s²
- 0-3 km storm-relative helicity
- 82 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.9
The text
As transmitted, in the capitals the NWS used until 2016.
145
WGUS55 KFGZ 012153
FFWFGZ
AZC005-012345-
/O.NEW.KFGZ.FF.W.0036.120901T2153Z-120901T2345Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
BULLETIN - EAS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE FLAGSTAFF AZ
253 PM MST SAT SEP 1 2012
THE NATIONAL WEATHER SERVICE IN FLAGSTAFF HAS ISSUED A
* FLASH FLOOD WARNING FOR...
NORTH CENTRAL COCONINO COUNTY IN NORTH CENTRAL ARIZONA...
THIS INCLUDES THE CITY OF ANTELOPE CANYON NEAR SR 98...
* UNTIL 445 PM MST
* AT 246 PM MST...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED
FLASH FLOODING FROM A THUNDERSTORM OVER ANTELOPE CANYON. THE LOWER
ANTELOPE CANYON AREA WILL BE AFFECTED THE MOST...WITH LESSER RAIN
AMOUNTS SOUTH OF ROUTE 98. A HALF INCH TO THREE QUARTERS OF AN
INCH OF RAINFALL WILL FALL WITH THIS STORM....AFFECTING AREAS TO
THE EAST AND WEST OF ANTELOPE CREEK AS WELL.
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 3693 11144 3694 11142 3691 11138 3687 11137
3685 11142 3686 11146
$$1 follow-up statement
590
WGUS75 KFGZ 012345
FFSFGZ
FLASH FLOOD STATEMENT
NATIONAL WEATHER SERVICE FLAGSTAFF AZ
445 PM MST SAT SEP 1 2012
AZC005-012349-
/O.EXP.KFGZ.FF.W.0036.000000T0000Z-120901T2345Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
COCONINO AZ-
445 PM MST SAT SEP 1 2012
...THE FLASH FLOOD WARNING WILL EXPIRE AT 445 PM MST FOR NORTH
CENTRAL COCONINO COUNTY...
AT 440 PM MST...FLAGSTAFF DOPPLER RADAR INDICATED NO FURTHER THREAT
OF SIGNIFICANT RAINFALL IN THE ANTELOPE CANYON AREA. NO REPORTS OF
SIGNIFICANT FLOODING HAVE BEEN RECEIVED FROM ANTELOPE CANYON BY THE
NATIONAL WEATHER SERVICE IN FLAGSTAFF. WATER LEVELS IN THE ANTELOPE
CANYON AREA AND SURROUNDING SIDE CANYONS MAY STILL BE SLIGHTLY
HIGHER THAN NORMAL FOR THE NEXT FEW HOURS...HOWEVER...THE FLASH
FLOOD WARNING WILL BE ALLOWED TO EXPIRE.
LAT...LON 3693 11144 3694 11142 3691 11138 3687 11137
3685 11142 3686 11146
$$The office that day
Everything else NWS Flagstaff, AZ issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Aug 31, 5:30 PM MST | Areal Flood Advisory | FGZ | Yavapai | 3 hr |
| Aug 31, 6:26 PM MST | Areal Flood Advisory | FGZ | Coconino | 3 hr |
| Sep 1, 12:12 PM MST | Severe Thunderstorm Warning | FGZ | Coconino | 33 min |
| Sep 1, 1:27 PM MST | Severe Thunderstorm Warning | FGZ | Coconino | 16 min |
| Sep 1, 1:56 PM MST | Severe Thunderstorm Warning | FGZ | Coconino | 18 min |
| Sep 1, 2:57 PM MST | Severe Thunderstorm Warning | FGZ | Coconino, Navajo | 17 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.