Alert archive / Arizona / Severe Thunderstorm Warnings in 2000
Severe Thunderstorm Warning 9, NWS Flagstaff, AZ
NWS Flagstaff, AZ issued this severe thunderstorm warning at Jul 22, 2000, 3:17 PM MST for Gila County, Arizona. It was in force for 28 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
- Jul 22, 2000, 3:17 PM MST (22:17 UTC)
- Expired
- Jul 22, 2000, 3:45 PM MST
- In force
- 28 min
- Issued by
- NWS Flagstaff, AZ
- Area
- Whole counties; the outline is the Mesonet’s reconstruction
County Gila County, AZ
The radar
The Flagstaff radar (KFSX), 35 km from the middle of the area, began a volume at 22:18 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
Phoenix, AZ (KPSR), launched 12:00Z, 10.3 hours before the alert went out and 111 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
- 763 J/kg
- Mixed-layer CIN
- -311 J/kg
- Mixed-layer LCL
- 2260 m above ground
- 0-6 km bulk shear
- 12 kt
- 0-1 km storm-relative helicity
- 4 m²/s²
- 0-3 km storm-relative helicity
- 43 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted, in the capitals the NWS used until 2016.
093 WUUS55 KFGZ 222217 SVRFLG AZC007-222245- BULLETIN - EAS ACTIVATION REQUESTED SEVERE THUNDERSTORM WARNING NATIONAL WEATHER SERVICE FLAGSTAFF AZ 317 PM MST SAT JUL 22 2000 THE NATIONAL WEATHER SERVICE IN FLAGSTAFF HAS ISSUED A * SEVERE THUNDERSTORM WARNING FOR... NORTHWESTERN GILA COUNTY IN ARIZONA THIS INCLUDES THE CITY OF PAYSON * UNTIL 345 PM MST * AT 316 PM MST...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A SEVERE THUNDERSTORM ABOUT 3 MILES EAST OF PAYSON...MOVING SOUTHWEST AT 10 MPH. * THE SEVERE THUNDERSTORM WILL BE NEAR... PAYSON AT 330 PM MST THIS STORM CONTAINS STRONG GUSTY WINDS IN EXCESS OF 55 MPH AND LARGE HAIL. REPORT SEVERE WEATHER TO THE NEAREST LAW ENFORCEMENT AGENCY. THEY WILL RELAY YOUR REPORT TO THE NATIONAL WEATHER SERVICE FORECAST OFFICE IN FLAGSTAFF. LAT...LON 3428 11144 3419 11134 3424 11118 3440 11129
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 Jul 22, 2:30 PM MST, 47 minutes earlier.
Area forecast discussion, Jul 22, 2:30 PM MST, 47 minutes before
NORTHERN ARIZONA FORECAST DISCUSSION NATIONAL WEATHER SERVICE FLAGSTAFF AZ 230 PM MST SAT JUL 22 2000 SYNOPSIS...A STRONG RIDGE OF HIGH PRESSURE IS EXPECTED TO REMAIN CENTERED OVER THE FOUR CORNERS AREA THROUGH SUNDAY AND THEN MOVE SOUTHWARD INTO SOUTHERN NEW MEXICO ON MONDAY. MID LEVEL MOISTURE WILL REMAIN OVER NORTHERN ARIZONA THROUGH SUNDAY AND THEN IS EXPECTED TO BE SWEPT EASTWARD ON MONDAY AS SOUTHWEST FLOW ALOFT RETURNS TO THE STATE. DISCUSSION...A BUSY AFTERNOON SO WILL KEEP IT SHORT. THE NGM AND ETA ARE IN GOOD AGREEMENT THROUGH 18Z SUNDAY AS THEY SHOW MID LEVEL MOISTURE BEING CIRCULATED AROUND THE ANTICYCLONE CENTERED OVER THE 4 CORNERS. AT 18Z SUNDAY THOUGH THE NGM DEVELOPS A 70% RH POOL AT H7 CENTERED OVER NEEDLES. THE DPROG/DT OF THIS PANEL DOES NOT SHOW GOOD RUN TO RUN CONSISTENCY. SECOND...THE OVERALL PATTERN ACROSS THE WEST LOOKS TO BE DEAMPLIFYING WITH TIME...ALLOWING THE RIDGE AXIS ORIENTATION TO CHANGE FROM ITS CURRENT NORTH TO SOUTH POSITION TO MORE EAST TO WEST. ALSO THE ANTICYCLONE CIRCULATION CENTER LOOKS TO BE SHIFTING SOUTHWARD SUNDAY NIGHT INTO MONDAY...WITH A RETURN OF DRY WEST SOUTHWEST FLOW TO CWA FROM MONDAY THROUGH AT LEAST THURSDAY. THE ETA HAS BEEN CONSISTENT WITH THE DRYING FROM WEST TO EAST...THUS WILL GO WITH THIS TREND. THE EXTENDED PROGS CONTINUE TO SHOW THE HIGH CENTER TO OUR SOUTH AND EAST...POINTING TO A WEST TO SOUTHWEST FLOW ALOFT. THUS WILL KEEP IT DRY IN THE EXTENDED. JDL .FGZ...NONE.
In the hours before
Special weather statement, Jul 22, 9:30 AM MST, 5 hours 47 minutes before
AZZ004>018-037>040-222030- HAZARDOUS WEATHER OUTLOOK NATIONAL WEATHER SERVICE FLAGSTAFF AZ 930 AM MST SAT JUL 22 2000 ...SCATTERED THUNDERSTORMS ALONG AND SOUTH OF THE MOGOLLON RIM TODAY...ISOLATED THUNDERSTORMS ACROSS THE COCONINO PLATEAU AND LITTLE COLORADO RIVER VALLEY... SPOTTER REPORTS OF HEAVY RAIN AND STRONG WINDS REQUESTED. MID LEVEL MONSOON MOISTURE HAS SPREAD NORTHWARD OVERNIGHT...NOW COVERING AREAS WEST AND SOUTH OF A LINE FROM PAGE TO WINSLOW TO GALLUP...NEW MEXICO. LOW LEVEL MOISTURE REMAINS OVER THE LOWER DESERT AREAS SOUTH AND WEST OF THE MOGOLLON RIM. SCATTERED THUNDERSTORMS ARE EXPECTED TO DEVELOP AFTER 1PM MST OVER THE HIGHER TERRAIN OF NORTH CENTRAL ARIZONA...AND LATER IN THE AFTERNOON OVER THE LOWER DESERT AND VALLEYS. THE MAIN THREATS TODAY FROM THE THUNDERSTORMS WILL BE LIGHTNING AND STRONG...ERRATIC WINDS IN THE VICINITY OF THE THUNDERSTORMS. LOCALLY HEAVY RAINS ARE AGAIN POSSIBLE IN SOUTHERN YAVAPAI COUNTY LATE IN THE DAY. JDL
The office that day
Everything else NWS Flagstaff, AZ issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jul 21, 7:37 PM MST | Severe Thunderstorm Warning | FGZ | Yavapai | 23 min |
| Jul 22, 4:29 PM MST | Severe Thunderstorm Warning | FGZ | Yavapai | 46 min |
Nearby
Severe Thunderstorm Warnings in Arizona, 2000Every severe thunderstorm warning in 2000
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.