Alert archive / Arizona / Severe Thunderstorm Warnings in 2015
Severe Thunderstorm Warning 95, NWS Flagstaff, AZ
NWS Flagstaff, AZ issued this severe thunderstorm warning at Aug 30, 2015, 4:44 PM MST for Coconino County, Arizona. It was in force for 31 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
- Aug 30, 2015, 4:44 PM MST (23:44 UTC)
- Expired
- Aug 30, 2015, 5:15 PM MST
- In force
- 31 min
- Issued by
- NWS Flagstaff, AZ
- Area
- Storm-based polygon
County Coconino County, AZ
The radar
The Flagstaff radar (KFSX), 150 km from the middle of the area, began a volume at 23:44 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, 11.7 hours before the alert went out and 68 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
- 216 J/kg
- Mixed-layer CIN
- -103 J/kg
- Mixed-layer LCL
- 1489 m above ground
- 0-6 km bulk shear
- 13 kt
- 0-1 km storm-relative helicity
- 20 m²/s²
- 0-3 km storm-relative helicity
- -67 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 Aug 30, 3:39 PM MST, 1 hour 5 minutes earlier.
Area forecast discussion, Aug 30, 3:39 PM MST, 1 hour 5 minutes before
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</html>Hazardous weather outlook, Aug 30, 3:56 AM MST, 12 hours 48 minutes before
HAZARDOUS WEATHER OUTLOOK NATIONAL WEATHER SERVICE FLAGSTAFF AZ 356 AM MST SUN AUG 30 2015 AZZ004>018-037>040-310330- 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- 356 AM MST SUN AUG 30 2015 THIS HAZARDOUS WEATHER OUTLOOK IS FOR APACHE...COCONINO... NORTHERN GILA...NAVAJO...AND YAVAPAI COUNTIES IN NORTHERN ARIZONA. .DAY ONE...TODAY AND TONIGHT HIGHER MOISTURE VALUES AND A MORE UNSTABLE AIRMASS WILL BRING AN ACTIVE DAY TO THE REGION TODAY. THE THREAT FOR LOCALLY HEAVY RAINFALL AND HAIL WILL BE ENHANCED...WHEN COMPARED TO SATURDAY. PRIMARY THREATS TODAY WILL BE HEAVY RAIN...GUSTY THUNDERSTORM WINDS TO 50 MPH... LIGHTNING AND ISOLATED DAMAGING HAIL. STORM MOTION WILL BE TO THE EAST AND NORTHEAST. .DAYS TWO THROUGH SEVEN...MONDAY THROUGH SATURDAY DRIER SOUTHWEST FLOW WILL DEVELOP NEXT WEEK...WITH STORM COVERAGE SLOWLY SHIFTING EAST TOWARD THE NEW MEXICO BORDER. .SPOTTER INFORMATION STATEMENT... WEATHER SPOTTERS ARE ENCOURAGED TO REPORT SIGNIFICANT WEATHER CONDITIONS ACCORDING TO STANDARD OPERATING PROCEDURES.
In the hours before
Special weather statement, Aug 30, 10:59 AM MST, 5 hours 45 minutes before
SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE FLAGSTAFF AZ 1059 AM MST SUN AUG 30 2015 AZZ004-006-007-301830- KAIBAB PLATEAU-COCONINO PLATEAU-GRAND CANYON COUNTRY- 1059 AM MST SUN AUG 30 2015 ...A STRONG THUNDERSTORM WILL AFFECT CENTRAL COCONINO COUNTY... AT 1057 AM MST...A STRONG THUNDERSTORM WAS 7 MILES WEST OF HERMITS REST...MOVING NORTHEAST AT 40 MPH. LOCALLY HEAVY RAIN...WIND GUSTS OF 50 TO 55 MPH...AND DIME SIZE HAIL ARE POSSIBLE WITH THIS STORM. LOCATIONS IMPACTED INCLUDE... HOPI POINT AT GRAND CANYON...PIMA POINT AT GRAND CANYON...HERMITS REST...MARICOPA POINT AT GRAND CANYON AND PORTIONS OF THE HAVASUPAI RESERVATION. FREQUENT CLOUD TO GROUND LIGHTNING IS OCCURRING WITH THIS STORM. LIGHTNING CAN STRIKE 15 MILES AWAY FROM A THUNDERSTORM. SEEK A SAFE SHELTER INSIDE A BUILDING OR VEHICLE. LAT...LON 3595 11244 3604 11251 3623 11213 3612 11203 TIME...MOT...LOC 1757Z 240DEG 48KT 3605 11234 BAK
Special weather statement, Aug 30, 11:32 AM MST, 5 hours 12 minutes before
SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE FLAGSTAFF AZ 1132 AM MST SUN AUG 30 2015 AZZ008-037-301845- YAVAPAI COUNTY MOUNTAINS-YAVAPAI COUNTY VALLEYS AND BASINS- 1132 AM MST SUN AUG 30 2015 ...A STRONG THUNDERSTORM WILL AFFECT EASTERN YAVAPAI COUNTY... AT 1131 AM MST...A STRONG THUNDERSTORM WAS OVER DEWEY-HUMBOLDT...OR 16 MILES SOUTHEAST OF CHINO VALLEY...MOVING NORTHEAST AT 10 MPH. WINDS IN EXCESS OF 40 MPH AND HALF INCH HAIL ARE POSSIBLE WITH THIS STORM. LOCATIONS IMPACTED INCLUDE... YAVAPAI COUNTY FAIRGROUNDS AND PRESCOTT VALLEY. THIS INCLUDES THE FOLLOWING HIGHWAYS... STATE ROUTE 89A BETWEEN MILE MARKERS 326 AND 327. STATE ROUTE 69 BETWEEN MILE MARKERS 282 AND 287. FREQUENT CLOUD TO GROUND LIGHTNING IS OCCURRING WITH THIS STORM. LIGHTNING CAN STRIKE 15 MILES AWAY FROM A THUNDERSTORM. SEEK A SAFE SHELTER INSIDE A BUILDING OR VEHICLE. THIS STORM MAY INTENSIFY...SO BE CERTAIN TO MONITOR LOCAL RADIO AND TV STATIONS...AS WELL AS LOCAL CABLE TV OUTLETS...FOR ADDITIONAL INFORMATION AND POSSIBLE WARNINGS FROM THE NATIONAL WEATHER SERVICE. LAT...LON 3451 11229 3453 11234 3467 11230 3460 11215 TIME...MOT...LOC 1831Z 211DEG 11KT 3456 11229 RR
Special weather statement, Aug 30, 12:32 PM MST, 4 hours 12 minutes before
SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE FLAGSTAFF AZ 1232 PM MST SUN AUG 30 2015 AZZ012-013-302000- LITTLE COLORADO RIVER VALLEY IN COCONINO COUNTY-LITTLE COLORADO RIVER VALLEY IN NAVAJO COUNTY- 1232 PM MST SUN AUG 30 2015 ...A STRONG THUNDERSTORM WILL AFFECT EASTERN COCONINO AND SOUTHWESTERN NAVAJO COUNTIES... AT 1231 PM MST...A STRONG THUNDERSTORM WAS 11 MILES SOUTH OF WINSLOW...MOVING NORTHEAST AT 10 MPH. WIND GUSTS OF 50 TO 55 MPH AND NICKEL SIZE HAIL ARE POSSIBLE WITH THIS STORM. THIS STORM WILL REMAIN OVER MAINLY RURAL AREAS OF SOUTHEASTERN LITTLE COLORADO RIVER VALLEY IN COCONINO COUNTY AND WEST CENTRAL LITTLE COLORADO RIVER VALLEY IN NAVAJO COUNTY COUNTIES. THIS INCLUDES THE FOLLOWING HIGHWAYS... STATE ROUTE 87 BETWEEN MILE MARKERS 334 AND 336. STATE ROUTE 99 BETWEEN MILE MARKERS 26 AND 33. TORRENTIAL RAINFALL IS ALSO OCCURRING WITH THIS STORM...AND MAY CAUSE LOCALIZED FLOODING. DO NOT DRIVE YOUR VEHICLE THROUGH FLOODED ROADWAYS. FREQUENT CLOUD TO GROUND LIGHTNING IS OCCURRING WITH THIS STORM. LIGHTNING CAN STRIKE 15 MILES AWAY FROM A THUNDERSTORM. SEEK A SAFE SHELTER INSIDE A BUILDING OR VEHICLE. LAT...LON 3477 11072 3481 11083 3497 11079 3488 11059 TIME...MOT...LOC 1931Z 207DEG 34KT 3487 11072 RR
The office that day
Everything else NWS Flagstaff, AZ issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Aug 29, 5:36 PM MST | Areal Flood Advisory | FGZ | Yavapai | 114 min |
| Aug 30, 10:59 AM MST | Special Weather Statement | FGZ | Coconino | 31 min |
| Aug 30, 11:32 AM MST | Special Weather Statement | FGZ | Yavapai | 13 min |
| Aug 30, 12:04 PM MST | Areal Flood Advisory | FGZ | Yavapai | 116 min |
| Aug 30, 12:17 PM MST | Severe Thunderstorm Warning | FGZ | Coconino | 28 min |
| Aug 30, 12:32 PM MST | Special Weather Statement | FGZ | 28 min | |
| Aug 30, 12:52 PM MST | Severe Thunderstorm Warning | FGZ | Coconino, Navajo | 23 min |
| Aug 30, 1:09 PM MST | Flash Flood Warning | FGZ | Coconino | 3 hr |
| Aug 30, 1:23 PM MST | Areal Flood Advisory | FGZ | Coconino, Navajo | 112 min |
| Aug 30, 1:24 PM MST | Flash Flood Warning | FGZ | Coconino | 3 hr |
| Aug 30, 1:51 PM MST | Areal Flood Advisory | FGZ | Coconino, Navajo | 3 hr |
| Aug 30, 2:14 PM MST | Flash Flood Warning | FGZ | Coconino | 3 hr |
| Aug 30, 2:16 PM MST | Areal Flood Advisory | FGZ | Navajo | 119 min |
Nearby
Severe Thunderstorm Warnings in Arizona, 2015Every severe thunderstorm warning in 2015
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.