Thunderstorm Wind, Coconino
- When
- August 8, 4:55 PM MST
- Where
- Coconino County, Jacob Lake
- Reported by
- NWS EMPLOYEE(OFF DUTY)
- Coordinates
- 35.839, -111.770 (the zone’s center; the record gives no point)
Damaging Wind in Arizona, August 8, 2001
An off duty NWS employee reported small hail five inches deep on Highway 67 near the North Rim Entrance Station.
Where it happened
Every event with a place to put it; 1 filed by county or forecast zone are drawn at its center, in a lighter ring. Tap one for its entry below.
- Tornadoes
- Tropical storms and surge
- Floods
- Wind
- Hail
- Winter weather
- Heat and drought
- Cold
- Fire, smoke and dust
- Marine and coastal
- Other
The toll
- Deaths
- 0
- Injuries
- 0
- Property damage
- None recorded
- Crop damage
- None recorded
- Events
- 1
Deaths and injuries are direct and indirect together, as the offices filed them. Damage is property and crops in the dollars of the year, not adjusted for inflation, and only where an office estimated it.
What happened
The episode as NWS FGZ wrote it up.
An off duty NWS employee reported small hail five inches deep on Highway 67 near the North Rim Entrance Station.
What forecasters said that day
The local office's own words before the first event, 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 the first event at Aug 8, 2:30 PM MST, 2 hours 25 minutes earlier.
Area forecast discussion, Aug 8, 2:30 PM MST, 2 hours 25 minutes before
NORTHERN ARIZONA FORECAST DISCUSSION NATIONAL WEATHER SERVICE FLAGSTAFF AZ 230 PM MST WED AUG 08 2001 .SYNOPSIS...A LOW PRESSURE SYSTEM WILL PERSIST OVER NEW MEXICO THROUGH THURSDAY. THIS SYSTEM WILL BE RESPONSIBLE FOR CLOUDY...WET AND COOLER WEATHER OVER PARTS OF THE STATE TONIGHT AND THURSDAY. THE LOW WILL BEGIN TO WEAKEN ON FRIDAY ALLOWING FOR A LITTLE DRIER AND WARMER WEATHER ON FRIDAY AND SATURDAY. THERE WILL BE ENOUGH MOISTURE AROUND INTO EARLY NEXT WEEK FOR A CHANCE OF AFTERNOON THUNDERSTORMS. .DISCUSSION...UPPER CLOSED-LOW CENTERED OVER NEW MEXICO WITH AN UPPER RIDGE CENTERED OVER SOUTHERN CALIFORNIA. AS A RESULT...A GENERAL NORTH TO NORTHEAST FLOW FROM THE SURFACE TO 200 MB WAS BEING OBSERVED ACROSS NORTHERN ARIZONA. THIS GENERAL FLOW PATTERN WILL REMAIN IN PLACE THROUGH THURSDAY AND ANY STORMS OR SHOWERS THAT DEVELOP WILL MOVE TO THE SOUTH THE NEXT TWO DAYS. TONIGHT..WITH A WEAK SYNOPTICALLY DRIVEN UPWARD MOTION FIELD ALOFT...EXPECT SCATTERED SHOWERS AND ISOLATED THUNDERSTORMS TO CONTINUE...MAINLY DURING THE EVENING HOURS. ON THURSDAY...EXPECT GENERAL MID-LEVEL CLOUDINESS TO PERSIST...ESPECIALLY FROM FLAGSTAFF EASTWARD...AS UPWARD MOTION FIELD GRADUALLY SHIFTS INTO SOUTHEAST ARIZONA. AS A RESULT...EXPECT SCATTERED SHOWERS AND ISOLATED THUNDERSTORMS CONTINUING OVER MUCH OF THE COUNTY WARNING AREA (CWA) ON THURSDAY. THURSDAY NIGHT AND FRIDAY A MORE NORTHWESTERLY FLOW WILL DEVELOP AS THE UPPER CLOSED LOW WEAKENS AND THE UPPER RIDGE STARTS TO DOMINATE THE FLOW OVER ARIZONA. THIS WILL RESULT IN A DRIER AIR MASS MOVING ACROSS THE AREA FOR SLIGHT CHANCE TO CHANCE POPS (POPS HIGHER OVER THE HIGHER TERRAIN AND OVER SOUTHERN PORTIONS OF THE CWA) ON FRIDAY. SHOULD BE A WARMUP ON FRIDAY WITH MORE SUNSHINE WITH LIGHT WINDS. IN THE EXTENDED...MODELS FAIRLY CONSISTENT IN PLACING THE 700-300 MB ANITCYCLONIC CIRCULATION OVER SOUTHWEST ARIZONA THROUGH SATURDAY. THIS SHOULD RESULT IN GRADUAL DRYING WITH JUST ISOLATED STORMS FOR SATURDAY. HOWEVER...BY SUNDAY AND MONDAY ANTICYCLONE MIGRATES TO THE FOUR CORNERS AREA WITH A MORE FAVORABLE FLOW DEVELOPING OVER NORTHWEST MEXICO FOR MCS DEVELOPMENT. THIS USUALLY MEANS AN ADDITIONAL PUSH OF LOW LEVEL MOISTURE. WILL BROAD BRUSH THE EXTENDED FORECAST FOR NOW WITH PARTLY CLOUDY WITH A CHANCE OF THUNDERSTORMS EACH DAY. MCCOLLUM .FGZ...NONE.
The radar
The national radar mosaic for the moment the first event began.
Event by event
1 thunderstorm wind. Local standard time, as filed.
What these are
- Thunderstorm Wind
- Winds from a thunderstorm of 50 knots (58 mph) or more, or lower winds that caused damage or casualties. Measured gusts are marked MG, estimated EG.
After NWS Directive 10-1605, the rules offices file Storm Data by.
The same day elsewhere
- Heat in New York, August 8 to 10, 2001
- Tornadoes and Flash Flooding in North Dakota, August 8, 2001
- Tornadoes and Flash Flooding in Minnesota, August 8, 2001
- Heat in North Carolina, August 8, 2001
- Heat in Texas, August 8, 2001
- Hail and Damaging Winds in North Dakota, August 8, 2001
- Damaging Winds in Minnesota, August 8, 2001
- Flash Flood in Colorado, August 8, 2001
- Damaging Winds in Ohio, August 8, 2001
- Hail and Damaging Winds in Michigan, August 8, 2001
- Lightning Strike in Tennessee, August 8, 2001
- Heat in New York, August 8 to 9, 2001
More
Every storm in Arizona in 2001Every state in 2001This day in weather historyWarnings in Arizona, August 2001
Sources
NOAA National Centers for Environmental Information, Storm Events Database, compiled from the National Weather Service’s monthly Storm Data. Complete through 2026-06; NCEI adds each month about 75 days after it ends and revises past years a few times a year. Rebuilt 2026-09-24. Each event’s entry at NCEI: 5266887.