Alert archive / Arizona / Flash Flood Warnings in 2001
Flash Flood Warning 13, NWS Flagstaff, AZ
NWS Flagstaff, AZ issued this flash flood warning at Sep 4, 2001, 12:45 PM MST for Coconino County, Arizona. It was in force for 45 min. No storm report in the archive falls inside the area while it was in force.
The area
The outline the Iowa Environmental Mesonet reconstructed for it; the warning itself named whole counties.
The facts
- Issued
- Sep 4, 2001, 12:45 PM MST (19:45 UTC)
- Expired
- Sep 4, 2001, 1:30 PM MST
- In force
- 45 min
- Issued by
- NWS Flagstaff, AZ
- Area
- Whole counties; the outline is the Mesonet’s reconstruction
County Coconino County, AZ
The radar
The Cedar City radar (KICX), 106 km from the middle of the area, began a volume at 19:45 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, 7.8 hours before the alert went out and 182 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
- 193 J/kg
- Mixed-layer CIN
- -156 J/kg
- Mixed-layer LCL
- 1696 m above ground
- 0-6 km bulk shear
- 20 kt
- 0-1 km storm-relative helicity
- 37 m²/s²
- 0-3 km storm-relative helicity
- -12 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted, in the capitals the NWS used until 2016.
000 WGUS55 KFGZ 041952 FFWFLG AZC005-042245- BULLETIN - EAS ACTIVATION REQUESTED FLASH FLOOD WARNING NATIONAL WEATHER SERVICE FLAGSTAFF AZ 1245 PM MST TUE SEP 4 2001 THE NATIONAL WEATHER SERVICE HAS ISSUED A * FLASH FLOOD WARNING FOR... EXTREME NORTH CENTRAL COCONINO COUNTY IN ARIZONA * UNTIL 230 PM MST * AT 1245 PM MST...WEATHER SERVICE DOPPLER RADAR INDICATED VERY HEAVY RAIN OVER EXTREME NORTH CENTRAL COCONINO COUNTY...OR ABOUT 8 MILES NORTHWEST OF HOUSE ROCK...MOVING NORTHEAST AT 20 MPH. THE HEAVIEST RAINFALL WAS INDICATED OVER THE EASTERN SIDE OF THE BUCKSKIN MOUNTAINS CENTERED AROUND BURRO SPRINGS. THE EXCESSIVE RAINFALL WILL FLOW INTO THE COYOTE WASH. EXCESSIVE RUNOFF FROM THIS STORM WILL CAUSE FLASH FLOODING OF CREEKS AND STREAMS...ROADS AND ROADSIDE CULVERTS. THE HEAVY RAINS COULD ALSO TRIGGER ROCK AND MUDSLIDES IN STEEP TERRAIN. 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. IF YOUR VEHICLE STALLS, ABANDON IT IMMEDIATELY AND SEEK HIGHER GROUND. TO REPORT SEVERE WEATHER HAVE THE NEAREST LAW ENFORCEMENT AGENCY RELAY YOUR REPORT TO THE NATIONAL WEATHER SERVICE FORECAST OFFICE. LAT...LON 3684 11219 3676 11210 3687 11198 3694 11208
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 Sep 4, 9:00 AM MST, 3 hours 45 minutes earlier.
Area forecast discussion, Sep 4, 9:00 AM MST, 3 hours 45 minutes before
NORTHERN ARIZONA FORECAST DISCUSSION NATIONAL WEATHER SERVICE FLAGSTAFF AZ 900 AM MST TUE SEP 04 2001 .SYNOPSIS...LINGERING MOISTURE WILL BRING ONE MORE DAY OF ISOLATED SHOWER AND THUNDERSTORM ACTIVITY TO NORTHERN AND EASTERN ARIZONA TODAY. BY WEDNESDAY...A STRONG DRYING TREND WILL SET IN WITH NO PRECIPITATION EXPECTED THROUGH THE UPCOMING WEEKEND. TEMPERATURES WILL REMAIN NEAR NORMAL...WITH A SLIGHT COOLING TREND BEGINNING THURSDAY. .DISCUSSION...MID-LEVEL ANTICYCLONIC CIRCULATION REMAINS OVER NORTHWEST MEXICO THIS MORNING WITH A SHORT-WAVE TROUGH EXITING CALIFORNIA AND BRUSHING NORTHERN ARIZONA. THE BOUNDARY LAYER HAS DRIED OVER THE PAST 24-HOURS BUT ENOUGH MOISTURE WILL REMAIN FOR ISOLATED ACTIVITY FROM FLAGSTAFF NORTH AND EAST. STRONGER MID-LEVEL SHEAR WILL DEVELOP DURING THE DAY AND WITH DRY AIR IN THE MID-LEVELS BOUNDARY LAYER MOISTURE WILL MIX OUT FURTHER. IN FACT...WITH STRONG MID-LEVEL SHEAR AND FAIRLY LOW CAPE ANY STORMS WILL BE EXTREMELY ISOLATED. THE MODEL SOLUTIONS HAVE CHANGED SIGNIFICANTLY OVER THE PAST 24-HOURS WITH A TROUGH INSTEAD OF A RIDGE ALONG THE WEST COAST. AS A RESULT...BY WEDNESDAY...A TROUGH APPROACHES THE PACIFIC NORTHWEST. AHEAD OF THE TROUGH AXIS HIGH CLOUDS WILL STREAM INTO NORTHERN ARIZONA AND WITH SOUTHERLY WIND TRAJECTORIES MID-LEVEL TEMPERATURES WILL WARM SOME. THIS SHOULD PUT AN END TO ANY THUNDERSTORMS. TEMPERATURES SHOULD REMAIN STEADY THE NEXT TWO DAYS WITH AFTERNOON SOUTHWEST WINDS OF 5 TO 20 MPH AS NEAR SURFACE PRESSURE GRADIENTS STRENGTHEN. EVEN DRIER AIR MOVES INTO ARIZONA BEYOND WEDNESDAY FOR DRY CONDITIONS AND SOMEWHAT COOLER TEMPERATURES. MCCOLLUM .FGZ...NONE.
In the hours before
Special weather statement, Sep 4, 9:30 AM MST, 3 hours 15 minutes before
AZZ004>018-037>040-041930- HAZARDOUS WEATHER OUTLOOK NATIONAL WEATHER SERVICE FLAGSTAFF AZ 930 AM MST TUE SEP 04 2001 ...ISOLATED THUNDERSTORMS OVER NORTHERN ARIZONA TODAY... THE AIR MASS HAS DRIED OVER NORTHERN ARIZONA DURING THE PAST 24-HOURS WITH ONLY ISOLATED THUNDERSTORMS EXPECTED FROM FLAGSTAFF NORTH AND EAST.
Nearby
Flash Flood Warnings in Arizona, 2001Every flash flood warning in 2001
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.