Alert archive / Arizona / Severe Thunderstorm Warnings in 2001
Severe Thunderstorm Warning 19, NWS Flagstaff, AZ
NWS Flagstaff, AZ issued this severe thunderstorm warning at Jul 5, 2001, 11:50 AM MST for Coconino County, Arizona. It was in force for 35 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, 11:50 AM MST (18:50 UTC)
- Expired
- Jul 5, 2001, 12:25 PM MST
- In force
- 35 min
- Issued by
- NWS Flagstaff, AZ
- Area
- Whole counties; the outline is the Mesonet’s reconstruction
County Coconino County, AZ
The nearest sounding before it
Flgstf/Belemont, AZ (KFGZ), launched 12:00Z, 6.8 hours before the alert went out and 133 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 051853 SVRFLG AZC005-051915- BULLETIN - EAS ACTIVATION REQUESTED SEVERE THUNDERSTORM WARNING NATIONAL WEATHER SERVICE FLAGSTAFF AZ 1150 AM MST THU JUL 5 2001 THE NATIONAL WEATHER SERVICE HAS ISSUED A * SEVERE THUNDERSTORM WARNING FOR... EXTREME WEST CENTRAL COCONINO COUNTY IN ARIZONA * UNTIL 1225 PM MST * AT 1150 AM MST...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A SEVERE THUNDERSTORM OVER FRAZIERS WELL...OR ABOUT 81 MILES NORTHWEST OF CHINO VALLEY...MOVING NORTHEAST AT 20 MPH. * THE SEVERE THUNDERSTORM WILL AFFECT OR PASS CLOSE TO...HIGHWAY 18 FROM FRAZIER WELLS TO 20 MILES NORTH OF FRAZIER WELLS AND RURAL WESTERN COCONINO COUNTY AT NOON MST. REPORT SEVERE WEATHER TO THE NEAREST LAW ENFORCEMENT AGENCY. THEY WILL RELAY YOUR REPORT TO THE NATIONAL WEATHER SERVICE FORECAST OFFICE. LAT...LON 3586 11319 3573 11303 3592 11278 3606 11296
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, 9:00 AM MST, 2 hours 50 minutes earlier.
Area forecast discussion, Jul 5, 9:00 AM MST, 2 hours 50 minutes before
NORTHERN ARIZONA FORECAST DISCUSSION NATIONAL WEATHER SERVICE FLAGSTAFF AZ 900 AM MST THU JUL 05 2001 SYNOPSIS...HIGH PRESSURE ALOFT WILL SHIFT EASTWARD OVER THE NEXT FEW DAYS. THIS WILL RESULT IN AN INCREASINGLY MOIST SOUTHERLY FLOW INTO ARIZONA. LOOK FOR DAILY SHOWERS AND THUNDERSTORMS OVER NORTHERN ARIZONA TO CONTINUE INTO NEXT WEEK. DISCUSSION...UPPER RIDGE CENTERED OVER COLORADO THIS MORNING. MODELS IN GENERAL AGREEMENT IN MOVING THIS FEATURE EASTWARD OVER THE NEXT TWO DAYS. FOR TODAY 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. THE REMAINDER OF THE AREA WILL SEE JUST ISOLATED 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 THUNDERSTOR|MS THIS SEASON. OTHERWISE...WITH MORE MOISTURE AND CLOUDS DAYTIME TEMPERATURES WILL GRADUALLY LOWER WITH GENERALLY LIGHT WINDS. CURRENT FORECAST IN GOOD SHAPE. MCCOLLUM .FGZ...NONE.
In the hours before
Special weather statement, Jul 5, 9:28 AM MST, 2 hours 22 minutes before
AZZ004>018-037>040-051930- HAZARDOUS WEATHER OUTLOOK NATIONAL WEATHER SERVICE FLAGSTAFF AZ 930 PM MST THU JUL 05 2001 ...ISOLATED SEVERE THUNDERSTORMS OVER WESTERN YAVAPAI AND COCONINO COUNTIES LATER THIS AFTERNOON AND INTO THE EVENING... DISCUSSION...SCATTERED THUNDERSTORMS ARE EXPECTED TO FORM THIS AFTERNOON...MAINLY OVER THE KAIBAB PLATEAU...GRAND CANYON COUNTRY AND WESTERN MOGOLLON RIM. SOUTHEAST FLOW ALOFT WILL PUSH THESE STORMS INTO THE LOWER TERRAIN OF WESTERN YAVAPAI AND COCONINO COUNTIES BY MID AFTERNOON. AS THE STORMS MOVE INTO DEEPER MOISTURE A FEW WILL BECOME SEVERE WITH THE MAIN THREAT BEING WIND GUSTS OF 50 TO 60 MPH. STORMS WILL ALSO BE CAPABLE OF PRODUCING DOWNPOURS OF 1 TO 2 INCHES BUT WIDESPREAD HEAVY RAINFALL IS NOT ANTICIPATED. STORMS SHOULD CONTINUE INTO THE EVENING HOURS BEFORE DIMINISHING.
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, 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 |
| Jul 5, 4:32 PM MST | Severe Thunderstorm Warning | FGZ | Yavapai | 43 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.