Alert archive / Arizona / Severe Thunderstorm Warnings in 2000
Severe Thunderstorm Warning 16, NWS Flagstaff, AZ
NWS Flagstaff, AZ issued this severe thunderstorm warning at Jul 23, 2000, 4:28 PM MST for Yavapai County, Arizona. It was in force for 32 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 23, 2000, 4:28 PM MST (23:28 UTC)
- Expired
- Jul 23, 2000, 5:00 PM MST
- In force
- 32 min
- Issued by
- NWS Flagstaff, AZ
- Area
- Whole counties; the outline is the Mesonet’s reconstruction
County Yavapai County, AZ
The radar
The Flagstaff radar (KFSX), 65 km from the middle of the area, began a volume at 23:28 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, 11.5 hours before the alert went out and 77 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
- 22 J/kg
- Mixed-layer CIN
- -280 J/kg
- Mixed-layer LCL
- 2267 m above ground
- 0-6 km bulk shear
- 3 kt
- 0-1 km storm-relative helicity
- -37 m²/s²
- 0-3 km storm-relative helicity
- 30 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted, in the capitals the NWS used until 2016.
247 WUUS55 KFGZ 232328 SVRFLG AZC025-240000- BULLETIN - EAS ACTIVATION REQUESTED SEVERE THUNDERSTORM WARNING NATIONAL WEATHER SERVICE FLAGSTAFF AZ 428 PM MST SUN JUL 23 2000 THE NATIONAL WEATHER SERVICE IN FLAGSTAFF HAS ISSUED A * SEVERE THUNDERSTORM WARNING FOR... EAST CENTRAL YAVAPAI COUNTY IN ARIZONA THIS INCLUDES THE CITY OF CAMP VERDE * UNTIL 500 PM MST * AT 428 PM MST...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A SEVERE THUNDERSTORM 8 MILES SOUTHWEST OF CAMP VERDE...MOVING NORTHEAST AT 15 MPH. * THE SEVERE THUNDERSTORM WILL BE NEAR... 3 MILES SOUTHEAST OF CAMP VERDE AT 440 PM MST 7 MILES SOUTHEAST OF MIDDLE VERDE AT 445 PM MST 5 MILES SOUTHEAST OF MCGUIREVILLE AT 455 PM MST 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 3454 11204 3442 11188 3453 11171 3467 11184
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 23, 2:30 PM MST, 1 hour 58 minutes earlier.
Area forecast discussion, Jul 23, 2:30 PM MST, 1 hour 58 minutes before
NORTHERN ARIZONA FORECAST DISCUSSION NATIONAL WEATHER SERVICE FLAGSTAFF AZ 230 PM MST SUN JUL 23 2000 SYNOPSIS...SCATTERED EVENING SHOWERS AND THUNDERSTORMS WILL GRADUALLY DIMINISH OVERNIGHT WITH PARTIAL CLEARING. ON MONDAY AND TUESDAY...MONSOON MOISTURE WILL SLOWLY SPREAD TO THE NORTHEAST PORTION OF THE STATE WITH AN INCREASING CHANCE OF AFTERNOON THUNDERSTORMS OVER THE LITTLE COLORADO RIVER VALLEY AND THE NAVAJO NATION. TEMPERATURES WILL REMAIN ABOVE NORMAL. DISCUSSION...SCATTERED CONV POPPING UP ON THE RIM...WITH ISOLD ORGANIZED SINGLE CELL STORMS IN SRN YAVAPAI COUNTY THIS AFTERNOON. ACTIVITY FOR THE MOST PART BEING DRIVEN BY DIURNAL HEATING AS THERE WAS LITTLE SYNOPTIC FORCING AROUND UNDERNEATH BROAD ANTICYCLONE OVER THE SW US. A FEW FEATURES OF NOTE THOUGH...A WEAK WAVE NEAR THE OLE MX BORDER TRACKING INTO SW AZ...ALONG WITH ANOTHER WAVE ROTATING AROUND MAIN HIGH PRESSURE CELL IN NW AZ. IN ADDITION...THERE WAS A BROAD AREA OF INERTIAL INSTABILITY ACROSS SW PORTIONS OF THE CWA...HELPING TO SUPPORT CONVECTIVE GROWTH IN CENTRAL YAVAPAI COUNTY. 12Z MODELS DO NOT PROVIDE MANY CLUES FOR THE FCST. RIDGE TO REMAIN FAIRLY STATIONARY OVER THE STATE...WITH A SLIGHT RETROGRADE TO THE WEST EACH DAY. WEAK DISTURBANCES TO CONTINUE TREND OF ROTATING ABOUT MAIN ANTICYCLONE AND MAY ENHANCE CONVECTION FROM TIME TO TIME. THUS STANDARD MONSOON FCST IN THE CARDS. IN THE EXTENDED...LITTLE CHANCE ON OVERALL PATTERN...AND DO NOT SEE MUCH CHANCE FOR WESTERLY FLOW SCOURING CWA OUT. WILL KEEP CHC POPS THROUGH EXTND. MCGRATH .FGZ...NONE.
The office that day
Everything else NWS Flagstaff, AZ issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jul 23, 12:28 PM MST | Severe Thunderstorm Warning | FGZ | Yavapai | 32 min |
| Jul 23, 1:00 PM MST | Severe Thunderstorm Warning | FGZ | Yavapai | 30 min |
| Jul 23, 1:30 PM MST | Severe Thunderstorm Warning | FGZ | Yavapai | 30 min |
| Jul 23, 2:12 PM MST | Severe Thunderstorm Warning | FGZ | Yavapai | 33 min |
| Jul 23, 3:19 PM MST | Severe Thunderstorm Warning | FGZ | Yavapai | 26 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.