Alert archive / Arizona / Flash Flood Warnings in 2011
Flash Flood Warning 8, NWS Flagstaff, AZ
NWS Flagstaff, AZ issued this flash flood warning at Jul 8, 2011, 12:17 PM MST for Coconino County, Arizona. It was in force for 3 hr. 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 8, 2011, 12:17 PM MST (19:17 UTC)
- Expired
- Jul 8, 2011, 3:45 PM MST
- In force
- 3 hr
- Issued by
- NWS Flagstaff, AZ
- Area
- Storm-based polygon
- Flood severity
- None
County Coconino County, AZ
The radar
The Cedar City radar (KICX), 151 km from the middle of the area, began a volume at 19:19 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, 7.3 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
- 423 J/kg
- Mixed-layer CIN
- -59 J/kg
- Mixed-layer LCL
- 1308 m above ground
- 0-6 km bulk shear
- 15 kt
- 0-1 km storm-relative helicity
- 14 m²/s²
- 0-3 km storm-relative helicity
- 77 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted, in the capitals the NWS used until 2016.
809
WGUS55 KFGZ 081917
FFWFGZ
AZC005-082115-
/O.NEW.KFGZ.FF.W.0008.110708T1917Z-110708T2115Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
BULLETIN - EAS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE FLAGSTAFF AZ
1217 PM MST FRI JUL 8 2011
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 SR 98...
* UNTIL 215 PM MST
* AT 1210 PM MST...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED
HEAVY RAIN PRODUCING FLASH FLOODING OVER UPPER ANTELOPE
CANYON...ON ANTELOPE CREEK.
* THE STORM PRODUCING FLASH FLOODING WILL AFFECT UPPER AND LOWER
ANTELOPE CANYON.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
A FLASH FLOOD WARNING MEANS THAT FLOODING IS IMMINENT OR OCCURRING.
DO NOT ATTEMPT TO CROSS SWIFTLY FLOWING WATERS OR WATERS OF UNKNOWN
DEPTH BY FOOT OR BY AUTOMOBILE.
&&
LAT...LON 3689 11144 3693 11142 3690 11139 3685 11136
3684 11141
$$3 follow-up statements
379
WGUS75 KFGZ 082029
FFSFGZ
FLASH FLOOD STATEMENT
NATIONAL WEATHER SERVICE FLAGSTAFF AZ
129 PM MST FRI JUL 8 2011
AZC005-082115-
/O.CON.KFGZ.FF.W.0008.000000T0000Z-110708T2115Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
COCONINO AZ-
129 PM MST FRI JUL 8 2011
...A FLASH FLOOD WARNING REMAINS IN EFFECT UNTIL 215 PM MST FOR NORTH
CENTRAL COCONINO COUNTY...
AT 115 PM MST...OFFICIALS AT ANTELOPE CANYON REPORTED LIGHT FLOW
MOVING THROUGH ANTELOPE CREEK. ADDITIONAL STORMS WILL MOVE THROUGH
THE DRAINAGE AREAS OF UPPER AND LOWER ANTELOPE CANYON THROUGH 2 PM
MST. DUE TO THE RAINFALL THAT HAS ALREADY SATURATED THE
DRAINAGE...ANY ADDITIONAL RAINFALL MAY PRODUCE MORE FLOODING WITH A
FASTER RESPONSE TIME.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
A FLASH FLOOD WARNING MEANS THAT FLOODING IS IMMINENT OR OCCURRING.
DO NOT ATTEMPT TO CROSS SWIFTLY FLOWING WATERS OR WATERS OF UNKNOWN
DEPTH BY FOOT OR BY AUTOMOBILE.
&&
LAT...LON 3689 11144 3693 11142 3690 11139 3685 11136
3684 11141
$$203
WGUS55 KFGZ 082101
FFWFGZ
AZC005-082245-
/O.EXT.KFGZ.FF.W.0008.000000T0000Z-110708T2245Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
BULLETIN - EAS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE FLAGSTAFF AZ
201 PM MST FRI JUL 8 2011
THE NATIONAL WEATHER SERVICE IN FLAGSTAFF HAS EXTENDED THE
* FLASH FLOOD WARNING FOR...
NORTH CENTRAL COCONINO COUNTY IN NORTH CENTRAL ARIZONA...
THIS INCLUDES ANTELOPE CANYON NEAR SR 98...
* EXTENDED UNTIL 345 PM MST
* AT 155 PM MST...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED
HEAVY RAIN APPROACHING ANTELOPE CREEK. THESE STORMS WILL PRODUCE
UP TO AN INCH OF ADDITIONAL RAINFALL OVER THE ANTELOPE CREEK
DRAINAGE.
* THE STORM PRODUCING FLASH FLOODING WILL AFFECT UPPER AND LOWER
ANTELOPE CANYON.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
A FLASH FLOOD WARNING MEANS THAT FLOODING IS IMMINENT OR OCCURRING.
DO NOT ATTEMPT TO CROSS SWIFTLY FLOWING WATERS OR WATERS OF UNKNOWN
DEPTH BY FOOT OR BY AUTOMOBILE.
&&
LAT...LON 3689 11144 3693 11142 3690 11139 3685 11136
3684 11141
$$897
WGUS75 KFGZ 082238
FFSFGZ
FLASH FLOOD STATEMENT
NATIONAL WEATHER SERVICE FLAGSTAFF AZ
338 PM MST FRI JUL 8 2011
AZC005-082246-
/O.EXP.KFGZ.FF.W.0008.000000T0000Z-110708T2245Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
COCONINO AZ-
338 PM MST FRI JUL 8 2011
...THE FLASH FLOOD WARNING WILL EXPIRE AT 345 PM MST FOR NORTH
CENTRAL COCONINO COUNTY...
THE FLASH FLOOD WARNING FOR ANTELOPE CANYON HAS BEEN ALLOWED TO
EXPIRE. NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATES THAT THE
HEAVY RAIN THAT PROMPTED THE WARNING HAS ENDED. LIGHT RAIN WILL
CONTINUE BUT LITTLE ADDITIONAL ACCUMULATION IS EXPECTED.
RUNOFF IN THE ANTELOPE CANYON DRAINAGE MAY CONTINUE FOR THE NEXT
HOUR OR TWO.
LAT...LON 3689 11144 3693 11142 3690 11139 3685 11136
3684 11141
$$
DBThe office that day
Everything else NWS Flagstaff, AZ issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jul 8, 11:02 AM MST | Severe Thunderstorm Warning | FGZ | Yavapai | 13 min |
| Jul 8, 1:41 PM MST | Areal Flood Advisory | FGZ | Coconino | 54 min |
| Jul 8, 3:15 PM MST | Severe Thunderstorm Warning | FGZ | Yavapai | 15 min |
| Jul 8, 3:44 PM MST | Flash Flood Warning | FGZ | Apache | 2 hr |
| Jul 8, 4:39 PM MST | Severe Thunderstorm Warning | FGZ | Yavapai | 21 min |
Nearby
Flash Flood Warnings in Arizona, 2011Every 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.