Alert archive / Arizona / Severe Thunderstorm Warnings in 1997
Severe Thunderstorm Warning 52, NWS Flagstaff, AZ
NWS Flagstaff, AZ issued this severe thunderstorm warning at Aug 12, 1997, 3:26 PM MST for Coconino County, Arizona. It was in force for 49 min. No storm report in the archive falls inside the area while it was in force.
The area
The counties it named.
The facts
- Issued
- Aug 12, 1997, 3:26 PM MST (22:26 UTC)
- Expired
- Aug 12, 1997, 4:15 PM MST
- In force
- 49 min
- Issued by
- NWS Flagstaff, AZ
- Area
- Whole counties
County Coconino County, AZ
The radar
The Flagstaff radar (KFSX), 150 km from the middle of the area, began a volume at 22:28 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, 10.4 hours before the alert went out and 68 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
- 85 J/kg
- Mixed-layer CIN
- -67 J/kg
- Mixed-layer LCL
- 1341 m above ground
- 0-6 km bulk shear
- 43 kt
- 0-1 km storm-relative helicity
- 79 m²/s²
- 0-3 km storm-relative helicity
- 77 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.3
The text
As transmitted, in the capitals the NWS used until 2016.
288 WUUS1 KFLG 122228 RRA SVRFLG AZC005-122315- BULLETIN - IMMEDIATE BROADCAST REQUESTED SEVERE THUNDERSTORM WARNING NATIONAL WEATHER SERVICE FLAGSTAFF AZ 326 PM MST TUE AUG 12 1997 THE NATIONAL WEATHER SERVICE IN FLAGSTAFF AZ HAS ISSUED A SEVERE THUNDERSTORM WARNING EFFECTIVE UNTIL 415 PM MST FOR PEOPLE IN THE FOLLOWING LOCATION... IN NORTH CENTRAL ARIZONA ...NORTHEASTERN COCONINO COUNTY AT 325 PM MST...A SEVERE THUNDERSTORM WAS INDICATED BY FLAGSTAFF DOPPLER RADAR 10 MILES EAST SOUTHEAST OF PAGE OR 15 MILES NORTH NORTHWEST OF KAIBITO MOVING EAST NORTHEAST AT 25 MPH. IF YOU ARE CAUGHT OUTSIDE...TRY TO FIND SHELTER IN A WELL PROTECTED AREA UNTIL THE STORM HAS PASSED. SEVERE THUNDERSTORMS PRODUCE DAMAGING WIND...LARGE HAIL...VERY HEAVY RAIN AND FREQUENT LIGHTNING.
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 12, 2:16 PM MST, 1 hour 10 minutes earlier.
Area forecast discussion, Aug 12, 2:16 PM MST, 1 hour 10 minutes before
NORTHERN ARIZONA FORECAST DISCUSSION NATIONAL WEATHER SERVICE FLAGSTAFF AZ 200 PM MST TUE AUG 12 1997 12Z MODELS APPEAR TO BE HANDLING LARGE SCALE FEATURE WELL THIS FORECAST PERIOD. STILL TRENDNING TOWARDS A DRYING OF THE LOWER LEVELS AND THIS FINALLY COMING TO FRUITION AS 88D ACTIVITY MUCH MORE QUIETER TODAY THAN ON PREVIOUS DAYS. ONLY FORECAST WORRY IS SOUTHERLY FLOW COMING OFF OF THE BAJA...AS A BIT OF A GULF SURGE IN PROGRESS AT YUME. THIS WILL MOST LIKELY AFFECT YAVAPAI COUNTY IF IT STAYS IN PLACE. UPPER RIDGE TO BECOME FLATTENED OUT A BIT OVER THE NEXT FEW DAYS AS TROUGH SITUATED OVER THE PAC NW SLOWLY SAGS SOUTHEASTWARDS. MODELS IN FAIR AGREEMENT WITH THIS SCENERIO. FOR TEMPS...NGM MOS NUMBERS LOOKING GOOD BUT WILL MAKE A FEW MINOR ADJUSTMENTS. FLG 1313 INW 1212 FLG...NONE
The office that day
Everything else NWS Flagstaff, AZ issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Aug 12, 2:12 PM MST | Severe Thunderstorm Warning | FGZ | Coconino | 73 min |
Nearby
Severe Thunderstorm Warnings in Arizona, 1997Every severe thunderstorm warning in 1997
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.