Alert archive / Arizona / Severe Thunderstorm Warnings in 2022
Severe Thunderstorm Warning 14, NWS Flagstaff, AZ
NWS Flagstaff, AZ issued this severe thunderstorm warning at Jul 17, 2022, 1:38 PM MDT for Navajo County, Arizona. It was in force for 37 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
- Jul 17, 2022, 1:38 PM MDT (19:38 UTC)
- Expired
- Jul 17, 2022, 2:15 PM MDT
- In force
- 37 min
- Issued by
- NWS Flagstaff, AZ
- Area
- Storm-based polygon
- Hail
- 1.0 in
- Wind
- 60.0 mph
County Navajo County, AZ
The radar
The Flagstaff radar (KFSX), 122 km from the middle of the area, began a volume at 19:37 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
Phoenix, AZ (KPSR), launched 12:00Z, 7.6 hours before the alert went out and 266 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
- 124 J/kg
- Mixed-layer CIN
- -614 J/kg
- Mixed-layer LCL
- 2663 m above ground
- 0-6 km bulk shear
- 20 kt
- 0-1 km storm-relative helicity
- 17 m²/s²
- 0-3 km storm-relative helicity
- 64 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
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 Jul 17, 10:45 AM MDT, 2 hours 53 minutes earlier.
Area forecast discussion, Jul 17, 10:45 AM MDT, 2 hours 53 minutes before
Area Forecast Discussion National Weather Service Flagstaff AZ 945 AM MST Sun Jul 17 2022 .SYNOPSIS...Monsoon moisture will remain in place for the foreseeable future. Expect showers and thunderstorms to develop each day, with lightning and heavy rain being the primary threats. Warmer than average temperatures are expected this weekend and lasting into next week. && .DISCUSSION...Sunny skies, decent PW values and southeasterly steering flow will make for an active day today. Expect initial storm activity over higher terrain features, the Mogollon Rim, the Bradshaws and the Chuskas, spreading westward through the day and into this evening. These conditions repeat for Monday, although there may be a slight downturn in activity, if we get really worked over today. Daytime temperatures will remain very warm for this forecast period, the only relief coming from rainfall. Forecast is in good shape, no updates needed. && .AVIATION...For the 18Z TAF package...Mainly VFR conditions are expected for the TAF period, outside of thunderstorms. Areas MVFR possible from 18Z-03Z, due to SHRA/TSRA and ISOLD +TSRA. Sfc winds generally light, aside from thunderstorm activity. Aviation discussion not updated for TAF amendments. && .FIRE WEATHER...Scattered showers and thunderstorms and warm temperatures are expected Sunday and Monday. Storms most numerous initially over higher terrain feature, then shifting westward late each afternoon and evening. Tuesday through Thursday...Chances for afternoon and evening showers and thunderstorms remain, but the emphasis for storm activity shifts a bit eastward. Outside of thunderstorms, temperatures will be warm with generally light winds. && .FGZ WATCHES/WARNINGS/ADVISORIES... Excessive Heat Warning until 6 PM MST Wednesday for AZZ005-006 below 4500 feet. && PUBLIC...Peterson AVIATION...Peterson FIRE WEATHER...BAJ/Peterson For Northern Arizona weather information visit weather.gov/flagstaff
The office that day
Everything else NWS Flagstaff, AZ issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jul 16, 6:57 PM MDT | Special Weather Statement | FGZ | Yavapai | 48 min |
| Jul 16, 8:19 PM MDT | Special Weather Statement | FGZ | 26 min | |
| Jul 16, 9:00 PM MDT | Areal Flood Advisory | FGZ | Apache, Navajo | 3 hr |
| Jul 16, 9:59 PM MDT | Areal Flood Advisory | FGZ | Yavapai | 2 hr |
| Jul 17, 1:19 AM MDT | Special Weather Statement | FGZ | 41 min | |
| Jul 17, 2:16 PM MDT | Severe Thunderstorm Warning | FGZ | Apache, Navajo | 44 min |
| Jul 17, 2:39 PM MDT | Severe Thunderstorm Warning | FGZ | Gila | 51 min |
| Jul 17, 2:58 PM MDT | Special Weather Statement | FGZ | 32 min | |
| Jul 17, 3:27 PM MDT | Special Weather Statement | FGZ | Coconino | 33 min |
| Jul 17, 3:42 PM MDT | Severe Thunderstorm Warning | FGZ | Gila | 48 min |
| Jul 17, 3:54 PM MDT | Flash Flood Warning | FGZ | Coconino, Gila | 3 hr |
| Jul 17, 4:13 PM MDT | Flash Flood Warning | FGZ | Gila, Navajo | 3 hr |
| Jul 17, 4:26 PM MDT | Severe Thunderstorm Warning | FGZ | Coconino, Gila, Yavapai | 49 min |
| Jul 17, 4:39 PM MDT | Special Weather Statement | FGZ | Navajo | 36 min |
| Jul 17, 5:01 PM MDT | Severe Thunderstorm Warning | FGZ | Yavapai | 44 min |
| Jul 17, 5:38 PM MDT | Flash Flood Warning | FGZ | Yavapai | 3 hr |
| Jul 17, 5:46 PM MDT | Special Weather Statement | FGZ | Yavapai | 29 min |
Nearby
Severe Thunderstorm Warnings in Arizona, 2022Every severe thunderstorm warning in 2022
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.