Alert archive / Arizona / Severe Thunderstorm Warnings in 2001
Severe Thunderstorm Warning 15, NWS Flagstaff, AZ
NWS Flagstaff, AZ issued this severe thunderstorm warning at Jul 4, 2001, 3:34 PM MST for Yavapai County, Arizona. It was in force for 26 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 4, 2001, 3:34 PM MST (22:34 UTC)
- Expired
- Jul 4, 2001, 4:00 PM MST
- In force
- 26 min
- Issued by
- NWS Flagstaff, AZ
- Area
- Whole counties; the outline is the Mesonet’s reconstruction
County Yavapai County, AZ
The watch it was issued in
The SPC watch in force over the same counties when this warning went out.
| Issued | Product | Office | Lasted |
|---|---|---|---|
| Jul 4, 3:30 PM MST | Severe Thunderstorm Watch | SPC | 7 hr |
The nearest sounding before it
Flgstf/Belemont, AZ (KFGZ), launched 12:00Z, 10.6 hours before the alert went out and 127 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
- 122 J/kg
- Mixed-layer CIN
- -219 J/kg
- Mixed-layer LCL
- 1981 m above ground
- 0-6 km bulk shear
- 17 kt
- 0-1 km storm-relative helicity
- 13 m²/s²
- 0-3 km storm-relative helicity
- 24 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted, in the capitals the NWS used until 2016.
000 WUUS55 KFGZ 042238 SVRFLG AZC025-042300- BULLETIN - EAS ACTIVATION REQUESTED SEVERE THUNDERSTORM WARNING NATIONAL WEATHER SERVICE FLAGSTAFF AZ 334 PM MST WED JUL 4 2001 THE NATIONAL WEATHER SERVICE HAS ISSUED A * SEVERE THUNDERSTORM WARNING FOR... NORTHWESTERN YAVAPAI COUNTY IN ARIZONA * UNTIL 400 PM MST * AT 334 PM MST...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A SEVERE THUNDERSTORM OVER NORTHWESTERN YAVAPAI COUNTY OVER THE JUNIPER MOUNTAINS AND ALONG INTERSTATE 40 NEAR FORT ROCK. * THE SEVERE THUNDERSTORM WILL AFFECT OR PASS CLOSE TO FORT ROCK ABOUT 350 PM. THE STORM WILL ALSO PASS ALONG INTERSTATE 40 IN THE VICINITY OF FORT ROCK AND THE JUNIPER MOUNTAINS. STRONG AND DAMAGING WINDS OF OVER 55 MPH ARE LIKELY FROM THIS STORM WITH AREAS OF HEAVY DOWNPOURS AND REDUCED VISIBILITY. TAKE COVER IN A STURDY STRUCTURE 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 3495 11332 3482 11320 3504 11272 3542 11331
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 4, 2:30 PM MST, 1 hour 4 minutes earlier.
Area forecast discussion, Jul 4, 2:30 PM MST, 1 hour 4 minutes before
NORTHERN ARIZONA FORECAST DISCUSSION NATIONAL WEATHER SERVICE FLAGSTAFF AZ 230 PM MST WED JUL 04 2001 SYNOPSIS...HIGH PRESSURE ALOFT WILL SHIFT EASTWARD OVER THE NEXT FEW DAYS WITH SOME INCREASE IN MOISTURE OVER NORTHERN ARIZONA AS SOUTHERLY FLOW DEVELOPS. AS A RESULT...LOOK FOR THE CHANCE OF MAINLY AFTERNOON AND EVENING THUNDERSTORMS TO CONTINUE INTO EARLY NEXT WEEK. DISCUSSION...STRONG UPPER RIDGE CENTERED OVER THE UTAH/COLORADO BORDER THIS AFTERNOON. MODELS IN GENERAL AGREEMENT IN MOVING THE RIDGE EASTWARD OVER THE NEXT TWO DAYS. DEEP SOUTHEASTERLY FLOW WILL CONTINUE ON THURSDAY BUT BECOME MORE SOUTHERLY ON FRIDAY AS A TROUGH ON THE WESTERN EDGE OF THE RIDGE MOVES NORTHWARD ACROSS ARIZONA. EXPECT A GENERAL UPTICK IN MOISTURE AND THUNDERSTORM COVERAGE THURSDAY AND FRIDAY AS FLOW TURNS TO A MORE MOIST SOUTHERLY TRAJECTORY. TEMPERATURES WILL REMAIN ABOVE NORMAL WITH LIGHT AND VARIABLE WINDS ON THURSDAY. WITH UPPER TROUGH APPROACHING ON FRIDAY WILL GO WITH A GENERAL PARTLY TO MOSTLY CLOUDY FORECAST WITH NO SIGNIFICANT DIURNAL TRENDS IN CLOUDINESS OR THUNDERSTORM ACTIVITY. DAYTIME HIGHS WILL LOWER SOME ON FRIDAY WITH INCREASED MOISTURE AND CLOUDINESS. FRIDAY COULD GET INTERESTING NEAR THE MOGOLLON RIM WITH DEEP MOISTURE POISED TO MOVE INTO CENTRAL ARIZONA..STRONG SOUTHERLY FLOW AND VERTICAL SHEAR. A GOOD SETUP FOR HEAVY RAIN PRODUCING STORMS WITH A TRAINING BEHAVIOR. HOWEVER...IF A MIDLEVEL CLOUD DECK FORMS IN ADVANCE OF THE TROUGH AXIS ON FRIDAY WONT SEE MUCH MORE THAN SCATTERED STORMS. IN THE EXTENDED...INVERTED TROUGH OVER BAJA CALIFORNIA WILL PHASE WITH WEAK SHORT-WAVE TROUGH IN THE WESTERLY FLOW OFF THE CALIFORNIA COAST. THIS WILL CAUSE A RELATIVELY STRONG TROUGH TO MOVE ACROSS ARIZONA ON FRIDAY. THE LATEST AVN MODEL DATA IS SUGGESTING THIS SYSTEM WILL DEVELOP STRONG SOUTHWEST TRAJECTORIES WITH A DRIER AIR MASS PUNCHING INTO ARIZONA OVER THE WEEKEND. HOWEVER...WOULD LIKE TO SEE A COUPLE MODEL RUNS BEFORE CHANGING THE CURRENT TRENDS IN THE EXTENDED. WILL CONTINUE WITH THE GENERAL PARTLY CLOUDY WITH A CHANCE OF THUNDERSTORMS IN THE EXTENDED. MCCOLLUM .FGZ...NONE.
The office that day
Everything else NWS Flagstaff, AZ issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jul 3, 5:13 PM MST | Severe Thunderstorm Warning | FGZ | Coconino, Gila, Yavapai | 32 min |
| Jul 3, 5:43 PM MST | Severe Thunderstorm Warning | FGZ | Yavapai | 47 min |
| Jul 4, 3:11 PM MST | Severe Thunderstorm Warning | FGZ | Gila | 34 min |
| Jul 4, 4:06 PM MST | Severe Thunderstorm Warning | FGZ | Yavapai | 54 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.