Alert archive / Arizona / Severe Thunderstorm Warnings in 2008
Severe Thunderstorm Warning 3, NWS Flagstaff, AZ
NWS Flagstaff, AZ issued this severe thunderstorm warning at Feb 20, 2008, 11:25 PM MST for Gila County, Navajo County, Arizona. It was in force for 22 min. No storm report in the archive falls inside the area while it was in force.
The area
The counties it named.
The facts
- Issued
- Feb 20, 2008, 11:25 PM MST (06:25 UTC)
- Expired
- Feb 20, 2008, 11:47 PM MST
- In force
- 22 min
- Issued by
- NWS Flagstaff, AZ
- Area
- Storm-based polygon
Counties Gila County, AZ, Navajo County, AZ
The radar
The Flagstaff radar (KFSX), 58 km from the middle of the area, began a volume at 06:29 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 00:00Z, 6.4 hours before the alert went out and 133 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
- 722 m above ground
- 0-6 km bulk shear
- 57 kt
- 0-1 km storm-relative helicity
- 96 m²/s²
- 0-3 km storm-relative helicity
- 152 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
What forecasters said that day
The local office's own words before this severe thunderstorm 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 severe thunderstorm warning went out at Feb 20, 9:10 PM MST, 2 hours 15 minutes earlier.
Area forecast discussion, Feb 20, 9:10 PM MST, 2 hours 15 minutes before
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</html>Hazardous weather outlook, Feb 20, 2:28 PM MST, 8 hours 57 minutes before
HAZARDOUS WEATHER OUTLOOK...CORRECTION NATIONAL WEATHER SERVICE FLAGSTAFF AZ 228 PM MST WED FEB 20 2008 AZZ004>018-037>040-210700- 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- 228 PM MST WED FEB 20 2008 THIS HAZARDOUS WEATHER OUTLOOK IS FOR PORTIONS OF EAST CENTRAL ARIZONA...NORTH CENTRAL ARIZONA...NORTHEAST ARIZONA AND WEST CENTRAL ARIZONA. .DAY ONE...THIS AFTERNOON AND TONIGHT A SNOW ADVISORY REMAIN IN EFFECT FOR THE KAIBAB PLATEAU FROM THIS AFTERNOON UNTIL THURSDAY MORNING FOR ELEVATIONS ABOVE 7000 FEET. A SERIES OF PACIFIC STORM SYSTEMS WILL AFFECT NORTHERN ARIZONA FOR THE NEXT 3 DAYS. THE FIRST STORM HAS THE POTENTIAL TO PRODUCE 2 TO 4 INCHES OF SNOWFALL OVERNIGHT ABOVE 6500 FEET WITH LOCALLY HIGHER AMOUNTS IN THE STRONGEST SNOW BANDS. .DAYS TWO THROUGH SEVEN...THURSDAY THROUGH TUESDAY ANOTHER STORM SYSTEM IS EXPECTED TO ARRIVE ON FRIDAY. THE LOW CENTER AND BEST DYNAMICS WITH THIS STORM ARE FORECAST TO BE NORTH OF THE STATE. THE CURRENT FORECAST CALLS FOR AROUND 1 TO 3 INCHES OF SNOWFALL ABOVE 6500 FEET WITH LOCALLY HIGHER AMOUNTS IN SOME FAVORED HIGH TERRAIN AREAS. .SPOTTER INFORMATION STATEMENT... RB
The office that day
Everything else NWS Flagstaff, AZ issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Feb 20, 7:20 PM MST | Severe Thunderstorm Warning | FGZ | Yavapai | 25 min |
| Feb 20, 7:47 PM MST | Severe Thunderstorm Warning | FGZ | Yavapai | 28 min |
Nearby
Severe Thunderstorm Warnings in Arizona, 2008Every severe thunderstorm warning in 2008
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.