Alert archive / Arizona / Severe Thunderstorm Warnings in 1997
Severe Thunderstorm Warning 9, NWS Flagstaff, AZ
NWS Flagstaff, AZ issued this severe thunderstorm warning at May 12, 1997, 2:33 PM MST for Gila County, Navajo County, Arizona. It was in force for 32 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
- May 12, 1997, 2:33 PM MST (21:33 UTC)
- Expired
- May 12, 1997, 3:05 PM MST
- In force
- 32 min
- Issued by
- NWS Flagstaff, AZ
- Area
- Whole counties
Counties Gila County, AZ, Navajo County, AZ
The radar
The Flagstaff radar (KFSX), 58 km from the middle of the area, began a volume at 21:36 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, 9.6 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
- 5 J/kg
- Mixed-layer CIN
- -283 J/kg
- Mixed-layer LCL
- 2048 m above ground
- 0-6 km bulk shear
- 14 kt
- 0-1 km storm-relative helicity
- 1 m²/s²
- 0-3 km storm-relative helicity
- 14 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted, in the capitals the NWS used until 2016.
000 TTAA00 KFLG 122133 RRA SVRFLG AZC007-017-122205- BULLETIN - IMMEDIATE BROADCAST REQUESTED SEVERE THUNDERSTORM WARNING NATIONAL WEATHER SERVICE FLAGSTAFF AZ 233 PM MST MON MAY 12 1997 THE NATIONAL WEATHER SERVICE IN FLAGSTAFF AZ HAS ISSUED A SEVERE THUNDERSTORM WARNING EFFECTIVE UNTIL 305 PM MST FOR PEOPLE IN THE FOLLOWING LOCATION... IN CENTRAL ARIZONA ...EASTERN GILA COUNTY IN NORTHEASTERN ARIZONA ...SOUTHERN NAVAJO COUNTY AT 231 PM MST...A SEVERE THUNDERSTORM WAS INDICATED BY FLAGSTAFF DOPPLER RADAR 44 MILES SOUTH OF SHOW LOW OR 11 MILES SOUTH SOUTHWEST OF FORT APACHE MOVING SOUTH AT 15 MPH. HAIL AROUND 1 INCH IN DIAMETER OR GREATER IS ASSOCIATED WITH THIS THUNDERSTORM. PEOPLE NEAR OR IN THE PATlH OF THIS SEVERE STORM SHOULD FIND SHELTER.
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 May 12, 2:03 PM MST, 30 minutes earlier.
Area forecast discussion, May 12, 2:03 PM MST, 30 minutes before
NORTHERN ARIZONA FORECAST DISCUSSION NATIONAL WEATHER SERVICE FLAGSTAFF AZ 200 PM MST MON MAY 12 1997 NRLY FLOW AND MID-LVL DRYING BHND DFRMTN ZN REDUCING CNVCTV ACTIVITY SOMEWHAT ACROSS PARTS OF RIM BUT STILL ENOUGH SFC MSTR FOR ISOLD-SCT STORMS...MAINLY WHITE MTNS. MDLS CONT NRLY FLOW AS RDG AXIS REMAINS TO THE WEST...BUT THIS FLOW SLWLY WEAKENS AS AXIS PUSHES EAST. ALL MDLS IN PRETTY GOOD AGRMNT SHOWING A LITTLE MORE MID-LVL DRYING AND SLOW INCRS IN HGTS/THKNS THRU WED...BUT SEE NO REASON WHY SFC MSTR WILL BE REDUCED AT ALL AS NRN AZ REMAINS UNDER RDG. MDL SNDGS INDICATE SLIGHTLY MORE STBL TUES WITH A BIT OF MID- AND LOW-LVL DRYING...BUT GUIDANCE SHOWS LTL CHNG IN SFC DW PTS. NOT MUCH CHANGE IN PTRN FOR WED. SO WILL REDUCE POPS FROM TDY BY ABOUT 10 PERCENT FOR BOTH TUES AND WED...WHILE INCRSG TMPS A FEW DEG. STORMS WILL FORM MAINLY OVER HIGHEST TERRAIN AND GENERALLY MOVE SOUTH...AS THEY ARE TDY. THEREFORE...WILL CONSIDER SOME ISOLD WORDING LWR ELEV SPOTS SOUTH OF TERRAIN BUT PRBLY NOT NORTH OF TERRAIN...SUCH AS WINSLOW AND ST JOHNS. SEE NO CHNGS IN EXTND TO SUGGEST LOW PRECIP CHNCS WILL GO TO ZERO OR GO HIGHER EITHER...SO STATUS QUO SEEMS FINE. FLG 1211 INW 0000, SJK FLG...NONE
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.