Alert archive / Arizona / Severe Thunderstorm Warnings in 2001
Severe Thunderstorm Warning 25, NWS Flagstaff, AZ
NWS Flagstaff, AZ issued this severe thunderstorm warning at Jul 5, 2001, 4:32 PM MST for Yavapai County, Arizona. It was in force for 43 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 5, 2001, 4:32 PM MST (23:32 UTC)
- Expired
- Jul 5, 2001, 5:15 PM MST
- In force
- 43 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), 43 km from the middle of the area, began a volume at 23:31 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 76 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
- 393 J/kg
- Mixed-layer CIN
- -153 J/kg
- Mixed-layer LCL
- 1839 m above ground
- 0-6 km bulk shear
- 32 kt
- 0-1 km storm-relative helicity
- -15 m²/s²
- 0-3 km storm-relative helicity
- 77 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.2
The text
As transmitted, in the capitals the NWS used until 2016.
000 WUUS55 KFGZ 052334 SVRFLG AZC025-060015- BULLETIN - EAS ACTIVATION REQUESTED SEVERE THUNDERSTORM WARNING NATIONAL WEATHER SERVICE FLAGSTAFF AZ 432 PM MST THU JUL 5 2001 THE NATIONAL WEATHER SERVICE HAS ISSUED A * SEVERE THUNDERSTORM WARNING FOR... EXTREME EAST CENTRAL YAVAPAI COUNTY IN ARIZONA * UNTIL 515 PM MST * AT 432 PM MST...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A SEVERE THUNDERSTORM OVER EXTREME EAST CENTRAL YAVAPAI COUNTY... ABOUT 15 MILES EAST OF CAMP VERDE...MOVING SOUTHWEST AT 10 MPH. * THE SEVERE THUNDERSTORM WILL AFFECT RURAL EASTERN YAVAPAI COUNTY THROUGH 515 PM MST HAIL...INTENSE RAIN AND STRONG DAMAGING WINDS AND CLOUD-TO-GROUND LIGHTNING ARE LIKELY WITH THIS STORM. TAKE COVER IN A SUBSTANTIAL SHELTER UNTIL THE STORM PASSES. REPORT SEVERE WEATHER TO THE NEAREST LAW ENFORCEMENT AGENCY. THEY WILL RELAY YOUR REPORT TO THE NATIONAL WEATHER SERVICE FORECAST OFFICE. LAT...LON 3462 11175 3438 11168 3461 11150 3469 11157
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 5, 2:30 PM MST, 2 hours 2 minutes earlier.
Area forecast discussion, Jul 5, 2:30 PM MST, 2 hours 2 minutes before
NORTHERN ARIZONA FORECAST DISCUSSION NATIONAL WEATHER SERVICE FLAGSTAFF AZ 230 PM MST THU JUL 05 2001 SYNOPSIS...HIGH PRESSURE ALOFT WILL SHIFT EASTWARD OVER THE NEXT FEW DAYS. AS A RESULT...A MOIST SOUTHERLY FLOW WILL DEVELOP OVER ARIZONA. LOOK FOR DAILY SHOWERS AND THUNDERSTORMS OVER NORTHERN ARIZONA TO CONTINUE INTO NEXT WEEK. DISCUSSION...UPPER RIDGE CENTERED OVER COLORADO THIS AFTERNOON. MODELS IN GENERAL AGREEMENT IN MOVING THIS FEATURE EASTWARD OVER THE NEXT TWO DAYS. FOR TONIGHT MID TO UPPER FLOW WILL REMAIN SOUTHEASTERLY WITH THE MAIN THUNDERSTORM ACTIVITY OVER THE WESTERN THIRD OF THE COUNTY WARNING AREA (CWA) WHERE THE HIGHEST MOISTURE VALUES ARE LOCATED. THIS INCLUDES THE WESTERN MOGOLLON RIM...YAVAPAI COUNTY...THE COCONINO PLATEAU...GRAND CANYON COUNTRY AND THE KAIBAB PLATEAU. EXPECT AT LEAST ISOLATED STORM ACTIVITY TO CONTINUE OVERNIGHT IN THIS AREA. THE REMAINDER OF THE CWA WILL SEE JUST ISOLATED EVENING THUNDERSTORMS AS DRIER AIR CONTINUES TO FEED IN FROM NEW MEXICO. ON FRIDAY AND SATURDAY A WEAK TROUGH (CURRENTLY ALONG THE BAJA CALIFORNIA COAST) WILL MOVE NORTHWARD ACROSS WESTERN ARIZONA AND SOUTHERN CALIFORNIA. THE NET RESULT WILL BE A DEEPENING AND STRENGTHENING SOUTHERLY FLOW. PRECIPITABLE WATER VALUES IN SOUTHERN ARIZONA ARE IN THE 1.50 TO 2.00 INCH RANGE TODAY AND THIS MOISTURE WILL BE ADVECTED ACROSS NORTHERN ARIZONA ON FRIDAY AND SATURDAY. AS A RESULT...COULD SEE THE MOST SIGNIFICANT THREAT OF FLASH FLOOD PRODUCING THUNDERSTORMS THIS SEASON. OTHERWISE...WITH MORE MOISTURE AND CLOUDS DAYTIME TEMPERATURES WILL GRADUALLY LOWER WITH GENERALLY LIGHT WINDS. IN THE EXTENDED...UPPER RIDGE REMAINS NEAR THE FOUR CORNERS AREA WITH MOISTURE CONTINUING TO MOVE INTO NORTHERN ARIZONA FROM THE SOUTH. AS A RESULT...A CHANCE OF SHOWERS AND THUNDERSTORMS ARE EXPECTED EACH DAY. MCCOLLUM .FGZ...NONE.
The office that day
Everything else NWS Flagstaff, AZ issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jul 4, 8:34 PM MST | Severe Thunderstorm Warning | FGZ | Coconino | 41 min |
| Jul 4, 9:18 PM MST | Severe Thunderstorm Warning | FGZ | Coconino, Yavapai | 27 min |
| Jul 5, 11:50 AM MST | Severe Thunderstorm Warning | FGZ | Coconino | 35 min |
| Jul 5, 12:52 PM MST | Severe Thunderstorm Warning | FGZ | Coconino, Yavapai | 43 min |
| Jul 5, 1:34 PM MST | Severe Thunderstorm Warning | FGZ | Coconino, Yavapai | 41 min |
| Jul 5, 1:58 PM MST | Flash Flood Warning | FGZ | Yavapai | 2 hr |
| Jul 5, 2:13 PM MST | Severe Thunderstorm Warning | FGZ | Yavapai | 47 min |
| Jul 5, 3:08 PM MST | Severe Thunderstorm Warning | FGZ | Gila | 52 min |
| Jul 5, 4:06 PM MST | Severe Thunderstorm Warning | FGZ | Gila | 39 min |
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.