Alert archive / Arizona / Severe Thunderstorm Warnings in 1997
Severe Thunderstorm Warning 33, NWS Flagstaff, AZ
NWS Flagstaff, AZ issued this severe thunderstorm warning at Aug 7, 1997, 2:53 PM MST for Yavapai County, Arizona. It was in force for 27 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 7, 1997, 2:53 PM MST (21:53 UTC)
- Expired
- Aug 7, 1997, 3:20 PM MST
- In force
- 27 min
- Issued by
- NWS Flagstaff, AZ
- Area
- Whole counties
County Yavapai County, AZ
The radar
The Flagstaff radar (KFSX), 124 km from the middle of the area, began a volume at 21:52 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, 9.9 hours before the alert went out and 98 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
- 11 J/kg
- Mixed-layer CIN
- -153 J/kg
- Mixed-layer LCL
- 2202 m above ground
- 0-6 km bulk shear
- 19 kt
- 0-1 km storm-relative helicity
- -57 m²/s²
- 0-3 km storm-relative helicity
- 25 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
The text of this product is not in the archive. The NWS text archive before 2002 is incomplete.
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 7, 2:30 PM MST, 23 minutes earlier.
Area forecast discussion, Aug 7, 2:30 PM MST, 23 minutes before
NORTHERN ARIZONA FORECAST DISCUSSION NATIONAL WEATHER SERVICE FLAGSTAFF AZ 230 PM MST THU AUG 07 1997 TSTMS FIRING OVER YAVAPAI COUNTY AS THESE AREAS FINALLY REACHED CONVECTIVE TEMP WITH ENUF LOW LVL MOISTURE...PRETTY MUCH AS EXPECTED THO A HOUR OR SO EARLY. BLV DVGNC ALOFT ONE OF THE REASONS ITS FIRING HERE...MORE SO THAN ERN RIM AND WHITE MTNS. TSTMS SHOULD DSPT AFTER SUNSET...THO HAIL WILL APPROACH SVR SIZE WITH A FEW BARELY REACHING SVR CRITERIA LATE THIS AFTN. NEXT TWO DAYS DONT LOOK PARTICULARLY INTERESTING...THO WILL HAVE TO WATCH LOW LVL MSTR SEEPING IN FROM S AND W ALONG WRN AZ BORDER. WITH RDG PROJECTED TO SHIFT SLOWLY SE...DOOR MAY BE OPENED FOR THIS MSTR TO SPREAD FURTHER EAST. IS ENUF TO INTRODUCE SLGT CHC FOR TSTMS OVER THE HILLS FRI AND SAT. FLG0112 INW0001 CUOCO FLG...NONE
The office that day
Everything else NWS Flagstaff, AZ issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Aug 7, 2:17 PM MST | Severe Thunderstorm Warning | FGZ | Yavapai | 33 min |
| Aug 7, 3:21 PM MST | Severe Thunderstorm Warning | FGZ | Yavapai | 34 min |
| Aug 7, 3:55 PM MST | Severe Thunderstorm Warning | FGZ | Yavapai | 35 min |
| Aug 7, 4:31 PM MST | Severe Thunderstorm Warning | FGZ | Yavapai | 29 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.