Alert archive / Arizona / Severe Thunderstorm Warnings in 2021
Severe Thunderstorm Warning 39, NWS Flagstaff, AZ
NWS Flagstaff, AZ issued this severe thunderstorm warning at Jul 14, 2021, 4:02 PM MST for Coconino County, Arizona. It was in force for 31 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 14, 2021, 4:02 PM MST (23:02 UTC)
- Expired
- Jul 14, 2021, 4:33 PM MST
- In force
- 31 min
- Issued by
- NWS Flagstaff, AZ
- Area
- Storm-based polygon
- Hail
- 1.0 in
- Wind
- 60.0 mph
County Coconino County, AZ
The radar
The Cedar City radar (KICX), 127 km from the middle of the area, began a volume at 23:03 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, 11.0 hours before the alert went out and 184 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
- 17 J/kg
- Mixed-layer CIN
- -187 J/kg
- Mixed-layer LCL
- 1682 m above ground
- 0-6 km bulk shear
- 19 kt
- 0-1 km storm-relative helicity
- 14 m²/s²
- 0-3 km storm-relative helicity
- 37 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- -0.0
The text
As transmitted.
711
WUUS55 KFGZ 142302
SVRFGZ
AZC005-142345-
/O.NEW.KFGZ.SV.W.0039.210714T2302Z-210714T2345Z/
BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service Flagstaff AZ
402 PM MST Wed Jul 14 2021
The National Weather Service in Flagstaff has issued a
* Severe Thunderstorm Warning for...
Coconino County in north central Arizona...
* Until 445 PM MST/545 PM MDT/.
* At 402 PM MST/502 PM MDT/, a severe thunderstorm was located 8
miles northwest of Marble Canyon, or 15 miles west of Page, moving
southeast 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...
Lees Ferry and Marble Canyon.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
For your protection move to an interior room on the lowest floor of a
building.
Torrential rainfall is occurring with this storm, and may lead to
flash flooding. Do not drive your vehicle through flooded roadways.
&&
LAT...LON 3692 11183 3698 11175 3686 11154 3674 11170
TIME...MOT...LOC 2302Z 319DEG 10KT 3691 11174
HAIL...1.00IN
WIND...60MPH
$$
MCT2 follow-up statements
478 WWUS55 KFGZ 142311 SVSFGZ Severe Weather Statement National Weather Service Flagstaff AZ 411 PM MST Wed Jul 14 2021 AZC005-142345- /O.CON.KFGZ.SV.W.0039.000000T0000Z-210714T2345Z/ Coconino- 411 PM MST Wed Jul 14 2021 ...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 445 PM MST/545 PM MDT/ FOR COCONINO COUNTY... At 411 PM MST/511 PM MDT/, a severe thunderstorm was located near Marble Canyon, or 14 miles west of Page, moving southeast at 10 mph. HAZARD...60 mph wind gusts and penny size hail. SOURCE...Radar indicated. IMPACT...Expect damage to roofs, siding, and trees. Locations impacted include... Lees Ferry and Marble Canyon. PRECAUTIONARY/PREPAREDNESS ACTIONS... For your protection move to an interior room on the lowest floor of a building. Torrential rainfall is occurring with this storm, and may lead to flash flooding. Do not drive your vehicle through flooded roadways. && LAT...LON 3688 11180 3695 11170 3686 11154 3674 11170 TIME...MOT...LOC 2311Z 319DEG 10KT 3689 11172 HAIL...0.75IN WIND...60MPH $$ MCT
022
WWUS55 KFGZ 142333
SVSFGZ
Severe Weather Statement
National Weather Service Flagstaff AZ
433 PM MST Wed Jul 14 2021
AZC005-142343-
/O.CAN.KFGZ.SV.W.0039.000000T0000Z-210714T2345Z/
Coconino-
433 PM MST Wed Jul 14 2021
...THE SEVERE THUNDERSTORM WARNING FOR COCONINO COUNTY IS
CANCELLED...
The storm which prompted the warning has moved out of the area.
Therefore, the warning has been cancelled. However heavy rain is
still possible with this thunderstorm.
LAT...LON 3688 11180 3695 11170 3686 11154 3674 11170
TIME...MOT...LOC 2330Z 319DEG 10KT 3684 11167
$$
MCTThe office that day
Everything else NWS Flagstaff, AZ issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jul 13, 5:20 PM MST | Flash Flood Warning | FGZ | Gila, Yavapai | 3 hr |
| Jul 13, 7:23 PM MST | Flash Flood Warning | FGZ | Coconino | 3 hr |
| Jul 14, 2:39 AM MST | Special Weather Statement | FGZ | Yavapai | 36 min |
| Jul 14, 3:06 AM MST | Areal Flood Advisory | FGZ | Yavapai | 111 min |
| Jul 14, 3:24 AM MST | Special Weather Statement | FGZ | Yavapai | 36 min |
| Jul 14, 3:38 AM MST | Areal Flood Advisory | FGZ | Yavapai | 2 hr |
| Jul 14, 3:59 AM MST | Special Weather Statement | FGZ | Yavapai | 46 min |
| Jul 14, 4:24 AM MST | Areal Flood Advisory | FGZ | Yavapai | 74 min |
| Jul 14, 4:30 AM MST | Special Weather Statement | FGZ | 45 min | |
| Jul 14, 4:45 AM MST | Special Weather Statement | FGZ | 45 min | |
| Jul 14, 5:23 AM MST | Special Weather Statement | FGZ | 37 min | |
| Jul 14, 9:53 AM MST | Flash Flood Watch | FGZ | Apache, Coconino, Navajo | 17 hr |
| Jul 14, 1:47 PM MST | Flash Flood Warning | FGZ | Coconino | 5 hr |
| Jul 14, 2:13 PM MST | Flash Flood Warning | FGZ | Coconino | 3 hr |
| Jul 14, 2:39 PM MST | Flash Flood Warning | FGZ | Coconino | 3 hr |
| Jul 14, 2:57 PM MST | Flash Flood Warning | FGZ | Yavapai | 3 hr |
| Jul 14, 3:36 PM MST | Flash Flood Warning | FGZ | Coconino | 3 hr |
| Jul 14, 4:24 PM MST | Flash Flood Warning | FGZ | Yavapai | 111 min |
| Jul 14, 4:54 PM MST | Flash Flood Warning | FGZ | Navajo | 111 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.