Alert archive / Arizona / Severe Thunderstorm Warnings in 2000
Severe Thunderstorm Warning 45, NWS Flagstaff, AZ
NWS Flagstaff, AZ issued this severe thunderstorm warning at Aug 17, 2000, 5:21 PM MST for Yavapai 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
- Aug 17, 2000, 5:21 PM MST (00:21 UTC)
- Expired
- Aug 17, 2000, 5:45 PM MST
- In force
- 24 min
- Issued by
- NWS Flagstaff, AZ
- Area
- Whole counties; the outline is the Mesonet’s reconstruction
County Yavapai County, AZ
The nearest sounding before it
Phoenix, AZ (KPSR), launched 00:00Z, 0.4 hours before the alert went out and 78 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
- 146 J/kg
- Mixed-layer CIN
- -205 J/kg
- Mixed-layer LCL
- 2669 m above ground
- 0-6 km bulk shear
- 13 kt
- 0-1 km storm-relative helicity
- -12 m²/s²
- 0-3 km storm-relative helicity
- 25 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted, in the capitals the NWS used until 2016.
061 WUUS55 KFGZ 180023 SVRFLG AZC025-180045- BULLETIN - EAS ACTIVATION REQUESTED SEVERE THUNDERSTORM WARNING NATIONAL WEATHER SERVICE FLAGSTAFF AZ 521 PM MST THU AUG 17 2000 THE NATIONAL WEATHER SERVICE IN FLAGSTAFF HAS ISSUED A * SEVERE THUNDERSTORM WARNING FOR... EXTREME SOUTH CENTRAL YAVAPAI COUNTY IN ARIZONA * UNTIL 545 PM MST * AT 521 PM MST...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A SEVERE THUNDERSTORM OVER EXTREME SOUTH CENTRAL YAVAPAI COUNTY...OVER BLACK CANYON CITY...MOVING EAST AT 15 MPH. 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. A SPOTTER IN BLACK CANYON CITY REPORTED WINDS OF 70 MPH WITH THIS STORM. A SEVERE THUNDERSTORM WATCH REMAINS IN EFFECT UNTIL 1000 PM MST THURSDAY EVENING FOR ARIZONA. A SEVERE THUNDERSTORM WATCH ALSO REMAINS IN EFFECT UNTIL 900 PM MST THURSDAY EVENING FOR ARIZONA. LAT...LON 3411 11228 3398 11219 3414 11210 3418 11224 &
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 17, 2:30 PM MST, 2 hours 51 minutes earlier.
Area forecast discussion, Aug 17, 2:30 PM MST, 2 hours 51 minutes before
NORTHERN ARIZONA FORECAST DISCUSSION NATIONAL WEATHER SERVICE FLAGSTAFF AZ 230 PM MST THU AUG 17 2000 SYNOPSIS...AN UPPER LEVEL DISTURBANCE AND MOISTURE FROM FORMER TROPICAL STORM BERYL WILL MOVE ACROSS SOUTHERN ARIZONA TONIGHT. AS A RESULT...SHOWERS AND THUNDERSTORMS ARE EXPECTED OVERNIGHT ACROSS MUCH OF CENTRAL ARIZONA. SOME OF THE STORMS MAY PRODUCE HEAVY RAINFALL. ON FRIDAY THE EASTERN SECTION OF THE STATE NEAR THE NEW MEXICO BORDER WILL SEE SCATTERED STORMS WITH LESS ACTIVITY EXPECTED OVER THE WESTERN SECTIONS. DISCUSSION...FORECAST FOCUS ON FLASH FLOOD POTENTIAL FOR SOUTHERN SECTIONS OF CWA TONIGHT. WILL ISSUE FLASH FLOOD WATCH FOR THIS EVENING AND TONIGHT FOR THE SOUTHERN RIM AND WHITE MOUNTAINS. DEW POINTS ACROSS SOUTHERN ARIZONA REMAIN IN THE 60S AND 70S. 18Z SOUNDINGS FROM PHX AND TUS CONTINUE TO SHOW OVER AN INCH OF PW. EASTERLY WAVE STILL PROGGED TO MOVE ACROSS AZ/MEX BORDER TONIGHT. A PIECE OF ENERGY BREAKS OFF...MOVING NORTH WITH SHEAR ZONE BISECTING THE CWA FROM SW TO NE. EXPECT THE MOISTURE TO MOVE NORTHWARD AS FLOW TURN SOUTHERLY TONIGHT. QPF PROGS INDICATE OVER AN INCH OF PRECIP POSSIBLE ACROSS SECTIONS OF SOUTH CENTRAL AZ. SHOWERS AND THUNDERSTORMS LIKELY OVERNIGHT SOUTHERN HALF OF CWA. POTENTIAL IS THERE FOR SOME OF THESE STORMS TO PRODUCE HEAVY RAINFALL AMOUNTS. NORMAL AFTERNOON CONVECTION EXPECTED TO DISSIPATE OVER NORTHERN CWA THIS EVENING. MORE STABLE CONDITIONS OVER THE WEST AND SOUTH TOMORROW AS SUBSIDENCE INDICATED BY THE MODELS. SCATTERED SHOWERS AND TSTMS TO CONTINUE OVER THE EASTERN CWA AS ENERGY AND MOISTURE MOVE TO THE NORTHEAST. EXTENDED...MEDIUM RANGES MODELS MAINTAIN HIG H PRESSURE CELL OVER THE DESERT SOUTHWEST. SEE NOTHING TO ALTER MODERATE MONSOON ACTIVITY EACH DAY. DF .FGZ...NONE.
The office that day
Everything else NWS Flagstaff, AZ issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Aug 17, 6:23 PM MST | Severe Thunderstorm Warning | FGZ | Gila | 37 min |
| Aug 17, 6:30 PM MST | Flash Flood Warning | FGZ | Yavapai | 30 min |
| Aug 17, 7:29 PM MST | Flash Flood Warning | FGZ | Gila | 61 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.