Alert archive / Arizona / Severe Thunderstorm Warnings in 2001
Severe Thunderstorm Warning 9, NWS Flagstaff, AZ
NWS Flagstaff, AZ issued this severe thunderstorm warning at Jun 23, 2001, 5:36 PM MST for Coconino County, Arizona. It was in force for 24 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
- Jun 23, 2001, 5:36 PM MST (00:36 UTC)
- Expired
- Jun 23, 2001, 6:00 PM MST
- In force
- 24 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), 78 km from the middle of the area, began a volume at 00:37 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, 0.6 hours before the alert went out and 46 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
- 58 J/kg
- Mixed-layer CIN
- -77 J/kg
- Mixed-layer LCL
- 1697 m above ground
- 0-6 km bulk shear
- 11 kt
- 0-1 km storm-relative helicity
- 6 m²/s²
- 0-3 km storm-relative helicity
- 87 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted, in the capitals the NWS used until 2016.
936 WUUS55 KFGZ 240037 SVRFLG AZC005-240100- BULLETIN - EAS ACTIVATION REQUESTED SEVERE THUNDERSTORM WARNING NATIONAL WEATHER SERVICE FLAGSTAFF AZ 536 PM MST SAT JUN 23 2001 THE NATIONAL WEATHER SERVICE HAS ISSUED A * SEVERE THUNDERSTORM WARNING FOR... SOUTH CENTRAL COCONINO COUNTY IN ARIZONA * UNTIL 600 PM MST * AT 536 PM MST...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A SEVERE THUNDERSTORM 7 MILES NORTH OF ANGELL...OR ABOUT 20 MILES EAST OF FLAGSTAFF...MOVING NORTHWEST AT 10 MPH. * THE SEVERE THUNDERSTORM WILL AFFECT OR PASS CLOSE TO... SUNSET CRATER NATIONAL MONUMENT AT 550 PM MST REPORT SEVERE WEATHER TO THE NEAREST LAW ENFORCEMENT AGENCY. THEY WILL RELAY YOUR REPORT TO THE NATIONAL WEATHER SERVICE FORECAST OFFICE. LAT...LON 3514 11128 3526 11111 3549 11131 3534 11152
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 Jun 23, 2:30 PM MST, 3 hours 6 minutes earlier.
Area forecast discussion, Jun 23, 2:30 PM MST, 3 hours 6 minutes before
NORTHERN ARIZONA FORECAST DISCUSSION NATIONAL WEATHER SERVICE FLAGSTAFF AZ 230 PM MST SAT JUN 23 2001 SYNOPSIS...HIGH PRESSURE WILL GRADUALLY MOVE EASTWARD THE NEXT SEVERAL DAYS WITH A MOIST SOUTHERLY FLOW DEVELOPING ACROSS NORTHERN ARIZONA. AS A RESULT...AFTERNOON AND EVENING SHOWER AND THUNDERSTORM ACTIVITY WILL CONTINUE INTO TUESDAY...ESPECIALLY OVER THE MOGOLLON RIM AND WHITE MOUNTAINS. SOME DRYING WILL TAKE PLACE LATER IN THE WEEK BUT THE THREAT OF THUNDERSTORMS WILL CONTINUE OVER THE HIGHER TERRAIN. TEMPERATURES WILL REMAIN NEAR SEASONAL LEVELS. DISCUSSION...MID LEVEL RIDGE AXIS LOCATED ALONG THE ARIZONA/NEW MEXICO BORDER THIS AFTERNOON. A TROUGH IN THE WESTERLIES APPROACHING THE PACIFIC NORTHWEST COAST WILL PUSH THE RIDGE AXIS EASTWARD ACROSS NEW MEXICO OVER THE NEXT TWO DAYS. HOWEVER...THE LOW TO MID LEVEL FLOW BETWEEN THE PACIFIC NORTHWEST TROUGH AND THE NEW MEXICO RIDGE WILL MAINLY BE SOUTHERLY WITH VERY LITTLE WESTERLY COMPONENT THROUGH MONDAY. AS A RESULT...THE AIR MASS WILL REMAIN MOIST. PRECIPITABLE WATER VALUES SOUTH OF THE MOGOLLON RIM WILL REMAIN OVER AN INCH WITH VALUES OF 0.50 TO 0.75 INCHES NORTH OF THE MOGOLLON RIM. THIS WILL ALSO KEEP US IN A REGIME THAT WILL CONTAIN DECENT VERTICAL SHEAR. CONDITIONS LOOK FAVORABLE FOR ANOTHER CONVECTIVE BLOWUP LATE SUNDAY OVER NORTHWEST MEXICO WHICH SHOULD PUSH ADDITIONAL MOISTURE INTO ARIZONA. ALSO...A CYCLONIC UPPER DISTURBANCE WILL MOVE ACROSS NORTHERN ARIZONA ON MONDAY BRINGING MUCH OF THIS ADDITIONAL MOISTURE WITH IT. AS GRADIENTS STRENGTHEN AFTERNOON WINDS SHOULD BE A LITTLE MORE PERSISTENT FROM THE SOUTHWEST AT 10 TO 20 MPH ON SUNDAY AND MONDAY. OTHERWISE...MILD TEMPERATURES THE NEXT TWO DAYS WITH VARYING DEGREES OF CLOUDINESS. IN THE EXTENDED...PACIFIC NORTHWEST TROUGH BRINGS SOUTHWESTERLY FLOW ACROSS MUCH OF NORTHERN ARIZONA WHICH USUALLY HAS A DRYING INFLUENCE. THE MAIN UNCERTAINTY IS THAT THE MODELS ARE BECOMING LESS AGGRESSIVE WITH THE TROUGH ON WEDNESDAY AND THURSDAY WITH THE UPPER RIDGE RETURNING TO A FAVORABLE POSITION BY FRIDAY. NOT COMPLETELY CONVINCED THAT IT WILL DRY OUT OVER NORTHERN ARIZONA SO HAVE CONTINUED WITH A CHANCE OF AFTERNOON AND EVENING SHOWERS AND THUNDERSTORMS THROUGH THE EXTENDED. MCCOLLUM .FGZ...NONE.
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.