Alert archive / Arizona / Severe Thunderstorm Warnings in 1997
Severe Thunderstorm Warning 53, NWS Flagstaff, AZ
NWS Flagstaff, AZ issued this severe thunderstorm warning at Aug 13, 1997, 1:41 PM MDT for Navajo County, Arizona. It was in force for 79 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 13, 1997, 1:41 PM MDT (19:41 UTC)
- Expired
- Aug 13, 1997, 3:00 PM MDT
- In force
- 79 min
- Issued by
- NWS Flagstaff, AZ
- Area
- Whole counties
County Navajo County, AZ
The nearest sounding before it
Flgstf/Belemont, AZ (KFGZ), launched 12:00Z, 7.7 hours before the alert went out and 136 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
- 0 J/kg
- Mixed-layer CIN
- No buoyant parcel
- Mixed-layer LCL
- 1285 m above ground
- 0-6 km bulk shear
- 27 kt
- 0-1 km storm-relative helicity
- 36 m²/s²
- 0-3 km storm-relative helicity
- 38 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 131943 RRA SVRFLG AZC017-132100- BULLETIN - IMMEDIATE BROADCAST REQUESTED SEVERE THUNDERSTORM WARNING NATIONAL WEATHER SERVICE FLAGSTAFF AZ 1241 PM MST WED AUG 13 1997 THE NATIONAL WEATHER SERVICE IN FLAGSTAFF AZ HAS ISSUED A SEVERE THUNDERSTORM WARNING EFFECTIVE UNTIL 200 PM MST FOR PEOPLE IN THE FOLLOWING LOCATION... IN NORTHEASTERN ARIZONA ...SOUTH CENTRAL AND SOUTHERN NAVAJO COUNTY AT 1238 PM MST...A SEVERE THUNDERSTORM WAS INDICATED BY FLAGSTAFF DOPPLER RADAR 11 MILES NORTHWEST OF SHOW LOW OR 11 MILES SOUTHWEST OF SNOWFLAKE MOVING EAST AT 10 MPH. THIS STORM WILL PASS OVER SHUMWAY BY 1 PM MST. SOME LOCATIONS IN THE WARNING AREA INCLUDE... SHUMWAY AND TAYLOR 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 13, 9:45 AM MDT, 3 hours 56 minutes earlier.
Area forecast discussion, Aug 13, 9:45 AM MDT, 3 hours 56 minutes before
NORTHERN ARIZONA FORECAST DISCUSSION NATIONAL WEATHER SERVICE FLAGSTAFF AZ 845 AM MST TUE AUG 12 1997 LOW LEVELS CONTINUING TO DRY OUT...AS 5H RIDGE FLATTENS AND UPPER LEVEL FLOW BECOMES MORE WESTERLY. SAT IMAGERY INDICATING THAT MOST OF THE CWA UNDER CLEAR SKIES...WITH SOME CLOUDS NOTED ON THE KAIBAB PLATEAU. 12Z SOUNDINGS INDICATING SOME INSTABILITY STILL PRESENT AND SHOULD SEE SOME DIURNAL DEVELOPMENT THIS AFTERNOON...AND THIS SHOULD OCCUR AT THE HIGHER TERRAIN. GULF SURGE FOR THE MOST PART HAS BEEN SHUT OFF. DEWPOINT VALUES STILL REMAINING IN THE AROUND 50 ACROSS MOST OF THE CWA...BUT MORNING SOUNDING INDICATING THAT MOISTURE LAYER IS A BIT MORE SHALLOW THAN PREVIOUS DAYS. EXPECTING SOME AREAS TO BECOME MIXED OUT LATER THIS MORNING INTO THIS AFTERNOON. FOR TEMPS...EXPECT FURTHER WARMING AS A BIT MORE DAYTIME HEATING AVAILABLE. CURRENT ZONES HAVE THIS COVERED...PLANNING NO UPDATES. FLG 1-00 INW 0000 FLG...NONE
The office that day
Everything else NWS Flagstaff, AZ issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Aug 13, 3:40 PM MDT | Severe Thunderstorm Warning | FGZ | Apache | 45 min |
| Aug 13, 5:42 PM MDT | Severe Thunderstorm Warning | FGZ | Navajo | 48 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.