Alert archive / Arizona / Severe Thunderstorm Warnings in 2001
Severe Thunderstorm Warning 53, NWS Flagstaff, AZ
NWS Flagstaff, AZ issued this severe thunderstorm warning at Aug 9, 2001, 12:36 PM MST for Coconino County, Arizona. It was in force for 29 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 9, 2001, 12:36 PM MST (19:36 UTC)
- Expired
- Aug 9, 2001, 1:05 PM MST
- In force
- 29 min
- Issued by
- NWS Flagstaff, AZ
- Area
- Whole counties; the outline is the Mesonet’s reconstruction
County Coconino County, AZ
The radar
The Flagstaff radar (KFSX), 75 km from the middle of the area, began a volume at 19:38 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, 7.6 hours before the alert went out and 18 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
- 1 J/kg
- Mixed-layer CIN
- No buoyant parcel
- Mixed-layer LCL
- 1316 m above ground
- 0-6 km bulk shear
- 17 kt
- 0-1 km storm-relative helicity
- 100 m²/s²
- 0-3 km storm-relative helicity
- 138 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted, in the capitals the NWS used until 2016.
546 WUUS55 KFGZ 091937 SVRFLG AZC005-092000- BULLETIN - EAS ACTIVATION REQUESTED SEVERE THUNDERSTORM WARNING NATIONAL WEATHER SERVICE FLAGSTAFF AZ 1236 PM MST THU AUG 9 2001 THE NATIONAL WEATHER SERVICE HAS ISSUED A * SEVERE THUNDERSTORM WARNING FOR... SOUTH CENTRAL COCONINO COUNTY IN ARIZONA THIS INCLUDES THE CITIES OF...FLAGSTAFF...KACHINA VILLAGE... MOUNTAINAIRE * UNTIL 105 PM MST * AT 1236 PM MST...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A SEVERE THUNDERSTORM OVER FLAGSTAFF. THE STORM WAS NEARLY STATIONARY. * THE SEVERE THUNDERSTORM WILL AFFECT OR PASS CLOSE TO... 3 MILES NORTHEAST OF KACHINA VILLAGE...4 MILES NORTH OF MOUNTAINAIRE AT 100 PM MST IF SEVERE WEATHER APPROACHES YOUR AREA...GO INSIDE A STURDY SHELTER AWAY FROM CREEK BEDS AND OTHER FLOOD-PRONE AREAS. REMEMBER...A SEVERE THUNDERSTORM CAN PRODUCE LARGE DAMAGING HAIL...DAMAGING WINDS IN EXCESS OF 58 MPH...DEADLY LIGHTNING...AND VERY HEAVY RAIN. 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 3524 11162 3517 11178 3497 11170 3508 11146
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 9, 9:00 AM MST, 3 hours 36 minutes earlier.
Area forecast discussion, Aug 9, 9:00 AM MST, 3 hours 36 minutes before
NORTHERN ARIZONA FORECAST DISCUSSION NATIONAL WEATHER SERVICE FLAGSTAFF AZ 900 AM MST THU AUG 09 2001 .SYNOPSIS...A LOW PRESSURE SYSTEM OVER NEW MEXICO WILL CONTINUE TO PRODUCE A MOIST NORTHEASTERLY FLOW OVER ARIZONA. THIS SYSTEM WILL BE RESPONSIBLE FOR CLOUDY...WET AND COOL WEATHER OVER MUCH OF THE STATE TODAY. 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 INTO EARLY NEXT WEEK FOR A CHANCE OF AFTERNOON THUNDERSTORMS. .DISCUSSION...A MID TO UPPER TROUGH REMAINS OVER NEW MEXICO WITH AN AN UPPER RIDGE CENTERED OVER NORTHERN BAJA CALIFORNIA. AS A RESULT...A MOIST NORTHEAST FLOW WILL CONTINUE FOR THE NEXT 24-HOURS WITH SHOWERS AND THUNDERSTORMS POSSIBLE ALMOST ANY HOUR OF THE DAY (OF COURSE MOST NUMEROUS DURING THE AFTERNOON AND EVENING HOURS). LOOKS LIKE STORMS WILL BE MOST NUMEROUS TODAY OVER THE EASTERN MOGOLLON RIM...WHITE MOUNTAINS AND EASTERN LITTLE COLORADO RIVER VALLEY WHERE IT IS MOSTLY SUNNY THIS MORNING AND DEEP MOISTURE IS LOCATED. ELSEWHERE...IT REMAINS UNSTABLE ENOUGH FOR SCATTERED SHOWERS AND THUNDERSTORMS TO DEVELOP TODAY WHERE BREAKS IN THE MID LEVEL CLOUD DECK FORM. FOR TONIGHT...WITH SUNNY SKIES OVER UTAH THIS MORNING...EXPECT ANOTHER ORGANIZED AREA OF THUNDERSTORMS TO MOVE INTO NORTH CENTRAL AND NORTHWEST PORTIONS OF ARIZONA DURING THE EVENING HOURS. ON FRIDAY...MODELS ARE INSISTING THAT THE UPPER RIDGE WILL SHIFT NORTHWARD WITH A DRIER NORTH TO NORTHWEST FLOW DEVELOPING. THINK THE NET RESULT WILL BE A SLIGHT DOWNTURN IN ACTIVITY AND A MORE DIURNAL NATURE TO THUNDERSTORMS. CURRENT FORECAST HANDLES THIS WELL. MCCOLLUM .FGZ...NONE.
In the hours before
Special weather statement, Aug 9, 9:30 AM MST, 3 hours 6 minutes before
AZZ004>018-037>040-091930- HAZARDOUS WEATHER OUTLOOK NATIONAL WEATHER SERVICE FLAGSTAFF AZ 930 AM MST THU AUG 9 2001 ...SCATTERED THUNDERSTORMS TODAY ACROSS NORTHERN ARIZONA WITH THE POTENTIAL FOR HEAVY RAINFALL... A NEARLY STATIONARY UPPER LEVEL WEATHER DISTURBANCE OVER NEW MEXICO WILL CONTINUE TO PRODUCE A MOIST NORTHEAST FLOW ACROSS NORTHERN ARIZONA TODAY. WIDESPREAD SHOWERS AND THUNDERSTORMS ARE EXPECTED. THE MAIN THREAT FROM THESE STORMS WILL BE HEAVY RAIN...WITH RAINFALL AMOUNTS OF 1 TO 3 INCHES POSSIBLE...AND THE POTENTIAL FOR LOCALIZED FLASH FLOODING. FOR TODAY THE MOST INTENSE STORMS ARE EXPECTED OVER THE LITTLE COLORADO RIVER VALLEY...THE WHITE MOUNTAINS AND THE MOGOLLON RIM. FOR LATE THIS AFTERNOON AND EVENING STRONGER STORMS SHOULD MOVE INTO THE AREA OF THE KAIBAB PLATEAU...PAGE...THE GRAND CANYON AND THE COCONINO PLATEAU.
The office that day
Everything else NWS Flagstaff, AZ issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Aug 9, 1:37 PM MST | Severe Thunderstorm Warning | FGZ | Coconino, Yavapai | 33 min |
| Aug 9, 2:45 PM MST | Flash Flood Warning | FGZ | Yavapai | 2 hr |
| Aug 9, 3:44 PM MST | Flash Flood Warning | FGZ | Yavapai | 2 hr |
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; radar from the NEXRAD Level II archive.