Alert archive / Arizona / Severe Thunderstorm Warnings in 2001
Severe Thunderstorm Warning 50, NWS Flagstaff, AZ
NWS Flagstaff, AZ issued this severe thunderstorm warning at Aug 4, 2001, 4:34 PM MST for Apache County, Arizona. It was in force for 26 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
- Aug 4, 2001, 4:34 PM MST (23:34 UTC)
- Expired
- Aug 4, 2001, 5:00 PM MST
- In force
- 26 min
- Issued by
- NWS Flagstaff, AZ
- Area
- Whole counties; the outline is the Mesonet’s reconstruction
County Apache County, AZ
The nearest sounding before it
Flgstf/Belemont, AZ (KFGZ), launched 12:00Z, 11.6 hours before the alert went out and 206 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
- 8 J/kg
- Mixed-layer CIN
- -197 J/kg
- Mixed-layer LCL
- 1658 m above ground
- 0-6 km bulk shear
- 8 kt
- 0-1 km storm-relative helicity
- 29 m²/s²
- 0-3 km storm-relative helicity
- 52 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted, in the capitals the NWS used until 2016.
000 WUUS55 KFGZ 042335 SVRFLG AZC001-050000- BULLETIN - EAS ACTIVATION REQUESTED SEVERE THUNDERSTORM WARNING NATIONAL WEATHER SERVICE FLAGSTAFF AZ 434 PM MST SAT AUG 4 2001 THE NATIONAL WEATHER SERVICE HAS ISSUED A * SEVERE THUNDERSTORM WARNING FOR... CENTRAL APACHE COUNTY IN ARIZONA THIS INCLUDES THE CITIES OF...CHAMBERS...SANDERS...WIDE RUINS * UNTIL 500 PM MST * AT 434 PM MST...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A SEVERE THUNDERSTORM 8 MILES SOUTHWEST OF CHAMBERS...MOVING NORTHEAST AT 10 MPH. * THE SEVERE THUNDERSTORM WILL AFFECT OR PASS CLOSE TO... CHAMBERS AT 440 PM MST 7 MILES SOUTH OF WIDE RUINS AT 500 PM MST VERY LARGE HAIL IS POSSIBLE WITH THIS SEVERE THUNDERSTORM. IF YOU ARE IN THE PATH OF THE STORM...PUT YOUR CAR IN A GARAGE AND MOVE TO A SUBSTANTIAL SHELTER. REPORT SEVERE WEATHER TO THE NEAREST LAW ENFORCEMENT AGENCY. THEY WILL RELAY YOUR REPORT TO THE NATIONAL WEATHER SERVICE FORECAST OFFICE. LAT...LON 3514 10970 3501 10940 3537 10926 3548 10958 $$ JJ
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 4, 2:30 PM MST, 2 hours 4 minutes earlier.
Area forecast discussion, Aug 4, 2:30 PM MST, 2 hours 4 minutes before
NORTHERN ARIZONA FORECAST DISCUSSION NATIONAL WEATHER SERVICE FLAGSTAFF AZ 230 PM MST SAT AUG 04 2001 .SYNOPSIS...HIGH PRESSURE OVER THE CENTRAL PLAINS WILL BUILD WESTWARD TOWARDS ARIZONA OVER THE NEXT FEW DAYS AND REMAIN IN PLACE FOR MUCH OF THE UPCOMING WEEK. AS A RESULT...MONSOON MOISTURE WILL REMAIN OVER THE STATE WITH A CHANCE OF SHOWERS AND THUNDERSTORMS EACH DAY. .DISCUSSION...LARGE COMPLEX OF OUTFLOW DOMINATED THUNDERSTORMS DEVELOPED OVER THE WESTERN MOGOLLON RIM AND YAVAPAI COUNTY MOUNTAINS THIS AFTERNOON WITH VERY HEAVY RAIN. THUNDERSTORM ACTIVITY ELSEWHERE SLOW TO DEVELOP BUT STILL EXPECTING DEVELOPMENT OVER THE WHITES AND EASTERN RIM LATER THIS AFTERNOON INTO THIS EVENING AS CIRCULATION CENTER MOVES TOWARD STATE FROM WEST TEXAS. EXPECT A MORE ORGANIZED COMPLEX TO DEVELOP OVER SOUTHEASTERN AZ WHICH MAY ALSO CONTRIBUTE TO OVERNIGHT ACTIVITY OVER THE SOUTHERN ZONES. WILL USE EVENING WORDING WHERE THUNDERSTORMS ARE CURRENTLY USING UP CONVECTIVE ENERGY AND BROADBRUSH THROUGH THE NIGHT IN SOUTHERN ZONES WHERE ACTIVITY WILL BE LATE TO START. MODELS INDICATE SOME MINOR UPS AND DOWNS TO MOISTURE AND SOME MODIFICATION TO STREAMLINE TRAJECTORIES AS RIDGE DEVELOPS NORTHWARD SENDING EASTERLY AND NORTHEASTERLY FLOW INTO THE STATE. THIS WILL KEEP MONSOON BOUNDARY WEST OF CWA. INTERESTING CIRCULATION CENTER MOVING UP THE WEST COAST OF MEXICO TO INTERACT WITH TEXAS CIRCULATION CENTER TOMORROW. WITH STRONG HEATING STILL IN DESERTS POTENTIAL EXISTS FOR GULF SURGE IF A LARGE THUNDERSTORM COMPLEX CAN DEVELOP OVER NORTHWEST MEXICO AND MOVE OVER GULF. DUE TO ALL THESE UNCERTAINTIES WILL BROADBRUSH TYPICAL MONSOONAL WORDING THROUGH THE FORECAST PERIOD. DEEPENING TROUGH OFF WEST COAST LATE IN THE EXTENDED PERIOD DOESNT APPEAR STRONG ENOUGH TO DRY OUT WESTERN CWA BUT WILL NEED TO BE MONITORED. STAUDENMAIER .FGZ...NONE.
The office that day
Everything else NWS Flagstaff, AZ issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Aug 4, 11:20 AM MST | Severe Thunderstorm Warning | FGZ | Coconino | 25 min |
| Aug 4, 2:20 PM MST | Flash Flood Warning | FGZ | Coconino | 70 min |
| Aug 4, 2:23 PM MST | Severe Thunderstorm Warning | FGZ | Yavapai | 37 min |
Nearby
Severe Thunderstorm Warnings in Arizona, 2001Every severe thunderstorm 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.