Alert archive / Arizona / Severe Thunderstorm Warnings in 2001
Severe Thunderstorm Warning 30, NWS Flagstaff, AZ
NWS Flagstaff, AZ issued this severe thunderstorm warning at Jul 8, 2001, 12:47 PM MST for Coconino County, Arizona. It was in force for 38 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 8, 2001, 12:47 PM MST (19:47 UTC)
- Expired
- Jul 8, 2001, 1:25 PM MST
- In force
- 38 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, 7.8 hours before the alert went out and 61 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
- 104 J/kg
- Mixed-layer CIN
- -81 J/kg
- Mixed-layer LCL
- 1219 m above ground
- 0-6 km bulk shear
- 27 kt
- 0-1 km storm-relative helicity
- -30 m²/s²
- 0-3 km storm-relative helicity
- 11 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 081953 CCA SVRFLG AZC005-082025- BULLETIN - EAS ACTIVATION REQUESTED SEVERE THUNDERSTORM WARNING NATIONAL WEATHER SERVICE FLAGSTAFF AZ...CORRECTED FOR MILE POST MAKRER 1247 PM MST SUN JUL 8 2001 THE NATIONAL WEATHER SERVICE HAS ISSUED A * SEVERE THUNDERSTORM WARNING FOR... SOUTHEASTERN COCONINO COUNTY IN ARIZONA * UNTIL 125 PM MST * AT 1247 PM MST...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A SEVERE THUNDERSTORM OVER TWO GUNS...OR ABOUT 24 MILES WEST OF WINSLOW...MOVING NORTH AT 25 MPH. THIS STORM HAS A HISTORY OF 60 MPH WIND. * THE SEVERE THUNDERSTORM WILL AFFECT OR PASS CLOSE TO... 6 MILES EAST OF ANGELL AT 1255 PM MST I-40 BETWEEN MILE POST 215 AND 240. REPORT SEVERE WEATHER TO THE NEAREST LAW ENFORCEMENT AGENCY. THEY WILL RELAY YOUR REPORT TO THE NATIONAL WEATHER SERVICE FORECAST OFFICE. LAT...LON 3489 11115 3507 11090 3538 11114 3531 11137
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 8, 8:45 AM MST, 4 hours 2 minutes earlier.
Area forecast discussion, Jul 8, 8:45 AM MST, 4 hours 2 minutes before
NORTHERN ARIZONA FORECAST DISCUSSION NATIONAL WEATHER SERVICE FLAGSTAFF AZ 845 AM MST SUN JUL 08 2001 SYNOPSIS...SOUTHERLY FLOW WILL CONTINUE TO SPREAD MOISTURE ACROSS NORTHERN ARIZONA. EXPECT THE PATTERN OF MAINLY AFTERNOON SHOWERS AND THUNDERSTORMS TO CONTINUE OVER MUCH OF THE AREA INTO MIDWEEK. DISCUSSION...DEEP SOUTHERLY FLOW CONTINUES ACROSS THE CWA AS RIDGE TO OUR EAST...AND WK TROUGH TO OUR WEST KEEPS CONVEYOR BELT OF MOISTURE STREAMING ACROSS THE AREA. 12Z FGZ SOUNDING...AS WELL AS THOSE FROM SURROUNDING SITES INDICATE THAT THE ATMOSPHERE HAS DESTABILIZED SLIGHTLY OVER THE PAST 24 HOURS. IN ADDITION...WE HAVE SEEN AN INCREASE IN PW VALUES BY A COUPLE OF TENTHS OF AN INCH. A WK WV WAS DISCERNIBLE ON WV IMAGERY PUSHING ACROSS EASTERN AND CENTRAL AZ THIS MORNING AND WILL BRING SOME WK UPLIFT MECHANISMS INTO PLAY. THUS... THUNDERSTORM ACTIVITY A GOOD BET TODAY. ACT SHOULD BE A LITTLE MORE WIDESPREAD THAN YSTDYS ACT. WILL ISSUE 1ST PD UPDATE SHORTLY BRING AREAL QUALIFIERS TO 1ST PD. MCGRATH .FGZ...NONE.
In the hours before
Special weather statement, Jul 8, 9:30 AM MST, 3 hours 17 minutes before
AZZ004>018-037>040-081930- HAZARDOUS WEATHER OUTLOOK NATIONAL WEATHER SERVICE FLAGSTAFF AZ 930 AM MST SUN JUL 08 2001 ...SCATTERED THUNDERSTORMS...SOME WITH HEAVY DOWNPOURS...ACROSS NORTHERN ARIZONA TODAY... A DEEP PLUME OF MONSOON MOISTURE WITH DEEP SOUTHERLY FLOW WILL REMAIN ACROSS NORTHERN ARIZONA TODAY. THE ATMOSPHERE OVER NORTHERN ARIZONA HAS DESTABILIZED SLIGHTLY OVER THE PAST 24 HOURS. AS A RESULT...MORE THUNDERSTORM ACTIVITY CAN BE EXPECTED TODAY. THE STRONGEST THUNDERSTORMS IN NORTHERN ARIZONA WILL DEVELOP ACROSS THE EASTERN AND CENTRAL MOUNTAINS...AS A WEAK DISTURBANCE MOVES ACROSS THE AREA LATER TODAY. DUE TO THE ABUNDANT MOISTURE...SOME OF THESE STORMS WILL BE CAPABLE OF PRODUCING HEAVY DOWNPOURS...ALONG WITH SMALL HAIL. EXPECT STREAMS AND WASHES IN THE VICINITY OF THESE STORMS THAT ARE NORMALLY DRY TO FLOW WITH WATER. SPOTTER REPORTS OF EXCESSIVE RAINFALL AMOUNTS AND SEVERE WEATHER SHOULD BE RELAYED TO THE NATIONAL WEATHER SERVICE. $$ MCGRATH
The office that day
Everything else NWS Flagstaff, AZ issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jul 8, 12:11 PM MST | Severe Thunderstorm Warning | FGZ | Coconino | 34 min |
| Jul 8, 3:27 PM MST | Flash Flood Warning | FGZ | Coconino | 33 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.