Alert archive / Arizona / Severe Thunderstorm Warnings in 2021
Severe Thunderstorm Warning 73, NWS Flagstaff, AZ
NWS Flagstaff, AZ issued this severe thunderstorm warning at Jul 24, 2021, 5:58 PM MDT for 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 outline as issued.
The facts
- Issued
- Jul 24, 2021, 5:58 PM MDT (23:58 UTC)
- Expired
- Jul 24, 2021, 6:30 PM MDT
- In force
- 32 min
- Issued by
- NWS Flagstaff, AZ
- Area
- Storm-based polygon
- Hail
- 1.0 in
- Wind
- 50.0 mph
County Navajo County, AZ
The radar
The Flagstaff radar (KFSX), 207 km from the middle of the area, began a volume at 00:02 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, 12.0 hours before the alert went out and 170 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.
072 WUUS55 KFGZ 242358 SVRFGZ AZC017-250030- /O.NEW.KFGZ.SV.W.0073.210724T2358Z-210725T0030Z/ BULLETIN - IMMEDIATE BROADCAST REQUESTED Severe Thunderstorm Warning National Weather Service Flagstaff AZ 458 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 530 PM MST/630 PM MDT/. * At 457 PM MST/557 PM MDT/, a severe thunderstorm was located 11 miles west of Forest Lake Chapter House, or 39 miles northwest of Keams Canyon, moving west at 15 mph. HAZARD...Quarter size hail. SOURCE...Radar indicated. IMPACT...Damage to vehicles is expected. * This severe thunderstorm will remain over mainly rural areas of Navajo County. PRECAUTIONARY/PREPAREDNESS ACTIONS... For your protection move to an interior room on the lowest floor of a building. && LAT...LON 3642 11038 3626 11037 3620 11072 3643 11072 TIME...MOT...LOC 2357Z 086DEG 12KT 3632 11051 HAIL...1.00IN WIND...<50MPH $$ McCollum
1 follow-up statement
571 WWUS55 KFGZ 250015 SVSFGZ Severe Weather Statement National Weather Service Flagstaff AZ 515 PM MST Sat Jul 24 2021 AZC017-250030- /O.CON.KFGZ.SV.W.0073.000000T0000Z-210725T0030Z/ Navajo- 515 PM MST Sat Jul 24 2021 ...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 530 PM MST/630 PM MDT/ FOR NAVAJO COUNTY... At 514 PM MST/614 PM MDT/, a severe thunderstorm was located 14 miles southeast of Cow Springs, or 39 miles east of Tuba City, moving west at 15 mph. HAZARD...Half dollar size hail. Wind gusts to 50 mph. SOURCE...Radar indicated. IMPACT...Damage to vehicles is expected. This severe thunderstorm will remain over mainly rural areas of Navajo County. PRECAUTIONARY/PREPAREDNESS ACTIONS... For your protection move to an interior room on the lowest floor of a building. && LAT...LON 3642 11038 3626 11037 3620 11072 3643 11072 TIME...MOT...LOC 0014Z 086DEG 12KT 3632 11058 HAIL...1.25IN WIND...<50MPH $$ McCollum
The 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, 5:20 PM MDT | Severe Thunderstorm Warning | FGZ | Navajo | 25 min |
| Jul 24, 5:51 PM MDT | Severe Thunderstorm Warning | FGZ | Navajo | 39 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.