Alert archive / Arizona / Winter Storm Warnings in 2010
Winter Storm Warning 3, NWS Flagstaff, AZ
NWS Flagstaff, AZ issued this winter storm warning at Jan 21, 2010, 1:00 PM MST for Coconino County, Yavapai County, Arizona. It took effect at Jan 22, 2010, 12:00 AM MST. It was in force for 31 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
- Jan 21, 2010, 1:00 PM MST (20:00 UTC)
- In effect from
- Jan 22, 2010, 12:00 AM MST
- Expired
- Jan 23, 2010, 6:51 AM MST
- In force
- 31 hr
- Issued by
- NWS Flagstaff, AZ
Counties Coconino County, AZ, Yavapai County, AZ
The radar
The Flagstaff radar (KFSX), 113 km from the middle of the area, began a volume at 20:01 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 33 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
- 0 J/kg
- Mixed-layer CIN
- No buoyant parcel
- Mixed-layer LCL
- 661 m above ground
- 0-6 km bulk shear
- 83 kt
- 0-1 km storm-relative helicity
- 273 m²/s²
- 0-3 km storm-relative helicity
- 296 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
What forecasters said that day
The local office's own words before this winter storm 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 winter storm warning went out at Jan 21, 9:46 AM MST, 3 hours 14 minutes earlier.
Area forecast discussion, Jan 21, 9:46 AM MST, 3 hours 14 minutes before
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</html>Hazardous weather outlook, Jan 21, 11:41 AM MST, 1 hour 19 minutes before
HAZARDOUS WEATHER OUTLOOK NATIONAL WEATHER SERVICE FLAGSTAFF AZ 1141 AM MST THU JAN 21 2010 AZZ004>018-037>040-220800- 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- 1141 AM MST THU JAN 21 2010 THIS HAZARDOUS WEATHER OUTLOOK IS FOR PORTIONS OF EAST CENTRAL ARIZONA...NORTH CENTRAL ARIZONA...NORTHEAST ARIZONA AND WEST CENTRAL ARIZONA. .DAY ONE...TODAY AND TONIGHT AND TONIGHT THE FIRST PART OF A HUGE PACIFIC STORM SYSTEM IS CURRENTLY AFFECTING MUCH OF NORTHERN AND CENTRAL ARIZONA THIS MORNING. AREAS OF RAIN AND SNOW WILL CONTINUE TO SPREAD EAST AND NORTH THROUGH THE DAY...BUT THE CENTRAL PART OF THE STATE ALONG AND SOUTH OF THE MOGOLLON RIM WILL BE THE HARDEST HIT. SNOW LEVELS HAVE STARTED TO RISE AND WILL CONTINUE RISING THROUGH THE DAY...PEAKING AROUND 7000 FEET ALONG AND SOUTH OF THE MOGOLLON RIM THIS EVENING. SNOW LEVELS WILL QUICKLY FALL TO AROUND 4500 FEET AFTER THE COLD FRONT PASSES AROUND MIDNIGHT TONIGHT. LARGE AMOUNTS OF RAIN WILL FALL BELOW 6500 FEET THIS AFTERNOON AND EVENING...WITH AS MUCH AS 3 TO 6 INCHES OF RAIN POSSIBLE IN THE LOWER ELEVATIONS OF YAVAPAI AND NORTHERN GILA COUNTIES. THIS AMOUNT OF RAIN...ALONG WITH POTENTIAL SNOW MELT FROM THE HIGHER TERRAIN...WILL LIKELY PRODUCE WIDESPREAD FLOODING. RESIDENTS LIVING NEAR THE VERDE RIVER...AGUA FRIA RIVER...SANTA MARIA RIVER...OAK CREEK...TONTO CREEK....CIBECUE CREEK AND ANY OTHER DRAINAGES SOUTH OF THE MOGOLLON RIM SHOULD MONITOR THIS DEVELOPING SITUATION CLOSELY AND BE PREPARED TO SEEK HIGHER GROUND. IN THE MOUNTAINS...HUGE AMOUNTS OF SNOWFALL WILL FALL TODAY DESPITE RISING SNOW LEVELS. THE SNOW LEVEL WILL TOP OUT AROUND 7000 FEET AND NO CHANGE TO A WINTERY MIX/RAIN IS EXPECTED ABOVE 7500 FEET. ELEVATIONS ABOVE 6500 FEET WILL STILL SEE AN ADDITIONAL 3-6 INCHES DURING THE DAY TODAY DESPITE THE CHANGE TO A WINTERY MIX. AFTER THE COLD FRONT PASSES TONIGHT HEAVY SNOW WILL RETURN TO NORTHERN ARIZONA WITH A STORM TOTAL OF 2-4 FEET OF SNOW ABOVE 6500 FEET AND 3-5 FEET ABOVE 7000 FEET. TO COMPLICATE THIS WEATHER SITUATION WILL BE A PERIOD OF STRONG WINDS THIS EVENING AS A COLD FRONT MOVES FROM WEST TO EAST. WITH HEAVY SNOW LOADING ON TREES AND UTILITY POLES ALONG WITH THE HIGH WINDS...POWER OUTAGES COULD BECOME A PROBLEM. THE COMBINATION OF THE STRONG WINDS AND HEAVY SNOW WILL BRING NEAR WHITE-OUT CONDITIONS AND VERY RAPID SNOW ACCUMULATION...MAKING TRAVEL CONDITIONS EXTRAORDINARILY HAZARDOUS. A VARIETY OF SNOW WINTER STORM WARNINGS...AND FLOOD WATCHES HAVE BEEN ISSUED. PLEASE REFER TO WWW.WEATHER.GOV/FLAGSTAFF FOR DETAILS. .DAYS TWO THROUGH SEVEN...FRIDAY THROUGH WEDNESDAY BEHIND A STRONG COLD FRONT EARLY FRIDAY MORNING...SNOW LEVELS WILL FALL TO 4500 TO 5000 FEET FRIDAY AFTERNOON. AREAS OF MODERATE TO HEAVY RAIN AND SNOW WILL CONTINUE...ESPECIALLY ALONG AND SOUTH OF THE RIM. AN ADDITIONAL INCH OF RAINFALL IS POSSIBLE BELOW 5000 FEET SOUTH OF THE RIM. ADDITIONAL SNOW AMOUNTS WILL RANGE FROM 3 TO 6 INCHES BELOW 6000 FEET...WITH 10 TO 20 INCHES ABOVE 6000 FEET. CONDITIONS WILL BECOME SHOWERY BY SATURDAY...WITH IMPROVING CONDITIONS SUNDAY AND MONDAY. ANOTHER STORM IS POSSIBLE LATE TUESDAY AND WEDNESDAY. .SPOTTER INFORMATION STATEMENT... WEATHER SPOTTERS ARE ENCOURAGED TO REPORT SIGNIFICANT WEATHER CONDITIONS ACCORDING TO STANDARD OPERATING PROCEDURES.
The office that day
Everything else NWS Flagstaff, AZ issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jan 21, 4:33 AM MST | Winter Weather Advisory | FGZ | Coconino | 8 hr |
| Jan 21, 3:30 PM MST | River Flood Warning | FGZ | Coconino, Yavapai | 11 hr |
Nearby
Winter Storm Warnings in Arizona, 2010Every winter storm 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.