Alert archive / Arizona / Severe Thunderstorm Warnings in 1997
Severe Thunderstorm Warning 32, NWS Flagstaff, AZ
NWS Flagstaff, AZ issued this severe thunderstorm warning at Aug 7, 1997, 2:17 PM MST for Yavapai County, Arizona. It was in force for 33 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, 2:17 PM MST (21:17 UTC)
- Expired
- Aug 7, 1997, 2:50 PM MST
- In force
- 33 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 21:18 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, 9.3 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
As transmitted, in the capitals the NWS used until 2016.
857 WUUS1 KFLG 072118 RRA SVRFLG AZC025-072150- BULLETIN - IMMEDIATE BROADCAST REQUESTED SEVERE THUNDERSTORM WARNING NATIONAL WEATHER SERVICE FLAGSTAFF AZ 217 PM MST THU AUG 7 1997 THE NATIONAL WEATHER SERVICE IN FLAGSTAFF AZ HAS ISSUED A SEVERE THUNDERSTORM WARNING EFFECTIVE UNTIL 250 PM MST FOR PEOPLE IN THE FOLLOWING LOCATION... IN CENTRAL ARIZONA ...SOUTH CENTRAL AND SOUTHWESTERN YAVAPAI COUNTY AT 215 PM MST...A SEVERE THUNDERSTORM WAS INDICATED BY FLAGSTAFF DOPPLER RADAR 19 MILES SOUTH SOUTHWEST OF PRESCOTT OR 5 MILES EAST OF PEEPLES VALLEY MOVING SOUTH SOUTHWEST AT 10 MPH. SOME LOCATIONS IN THE WARNING AREA INCLUDE... PEEPLES VALLEY AND YARNELL. IF YOU ARE CAUGHT OUTSIDE...FIND SHELTER IN A STRONG BUILDING AND STAY AWAY FROM WINDOWS 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 7, 9:04 AM MST, 5 hours 13 minutes earlier.
Area forecast discussion, Aug 7, 9:04 AM MST, 5 hours 13 minutes before
NORTHERN ARIZONA FORECAST DISCUSSION NATIONAL WEATHER SERVICE FLAGSTAFF AZ 900 AM MST THU AUG 07 1997 RIDGE TO THE WEST PRODUCING A DRY NWLY FLOW AFOFT OVR NRN AZ. LOWER AND UPR LVLS ARE DRY...WITH A THIN LAYER OF MOISTURE CENTERED ON AT ABOUT 575 MB. MODIFYING THE 12 SOUNDING PRODUCES A NONENERGETIC RESULT SO...CURRENT NO POPS FCST FOR ALL BUT ZONE 8 SHOULD FLY. SLGT CHC OVR YAVAPAI COUNTY MAKES SENSE AS IT IS ONLY TO EDGE OF DEEPER MOISTURE AND MAY ALSO BE AFFECTED BY OUTFLOWS FROM MEXICO MCS. NO CHGS NEEDED. FLG0000 INW0000 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, 2:53 PM MST | Severe Thunderstorm Warning | FGZ | Yavapai | 27 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.