Alert archive / Arizona / Severe Thunderstorm Warnings in 2021
Severe Thunderstorm Warning 71, NWS Flagstaff, AZ
NWS Flagstaff, AZ issued this severe thunderstorm warning at Jul 24, 2021, 5:20 PM MDT for Navajo County, Arizona. It was in force for 25 min. No storm report in the archive falls inside the area while it was in force.
The area
The outline as issued.
The facts
- Issued
- Jul 24, 2021, 5:20 PM MDT (23:20 UTC)
- Expired
- Jul 24, 2021, 5:45 PM MDT
- In force
- 25 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), 167 km from the middle of the area, began a volume at 23:24 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, 11.3 hours before the alert went out and 156 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
- 1053 m above ground
- 0-6 km bulk shear
- 21 kt
- 0-1 km storm-relative helicity
- 13 m²/s²
- 0-3 km storm-relative helicity
- -9 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted.
257
WUUS55 KFGZ 242320
SVRFGZ
AZC017-242345-
/O.NEW.KFGZ.SV.W.0071.210724T2320Z-210724T2345Z/
BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service Flagstaff AZ
420 PM MST Sat Jul 24 2021
The National Weather Service in Flagstaff has issued a
* Severe Thunderstorm Warning for...
Navajo County in north central Arizona...
* Until 445 PM MST.
* At 419 PM MST, a severe thunderstorm was located near Keams Canyon,
moving west at 10 mph.
HAZARD...60 mph wind gusts and quarter size hail.
SOURCE...Radar indicated.
IMPACT...Hail damage to vehicles is expected. Expect wind damage
to roofs, siding, and trees.
* Locations impacted include...
Keams Canyon, First Mesa and Polacca.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
For your protection move to an interior room on the lowest floor of a
building.
&&
LAT...LON 3596 11018 3577 11016 3570 11037 3594 11044
TIME...MOT...LOC 2319Z 078DEG 7KT 3587 11023
HAIL...1.00IN
WIND...60MPH
$$
TPSThe office that day
Everything else NWS Flagstaff, AZ issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jul 23, 6:56 PM MDT | Severe Thunderstorm Warning | FGZ | Apache | 34 min |
| Jul 23, 7:00 PM MDT | Flash Flood Warning | FGZ | Coconino | 3 hr |
| Jul 24, 12:13 AM MDT | Areal Flood Advisory | FGZ | Apache, Coconino, Gila, Navajo | 5 hr |
| Jul 24, 8:22 AM MDT | Areal Flood Advisory | FGZ | Apache, Coconino, Navajo | 16 hr |
| Jul 24, 2:28 PM MDT | Severe Thunderstorm Warning | FGZ | Apache | 32 min |
| Jul 24, 2:56 PM MDT | Severe Thunderstorm Warning | FGZ | Apache | 34 min |
| Jul 24, 3:16 PM MDT | Severe Thunderstorm Warning | FGZ | Apache | 29 min |
| Jul 24, 3:43 PM MDT | Severe Thunderstorm Warning | FGZ | Apache | 32 min |
| Jul 24, 5:01 PM MDT | Flash Flood Warning | FGZ | Yavapai | 119 min |
| Jul 24, 5:05 PM MDT | Flash Flood Warning | FGZ | Apache | 3 hr |
| Jul 24, 5:18 PM MDT | Flash Flood Warning | FGZ | Apache, Navajo | 3 hr |
| Jul 24, 5:51 PM MDT | Severe Thunderstorm Warning | FGZ | Navajo | 39 min |
| Jul 24, 5:58 PM MDT | Severe Thunderstorm Warning | FGZ | Navajo | 32 min |
Nearby
Severe Thunderstorm Warnings in Arizona, 2021Every severe thunderstorm warning in 2021
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.