Alert archive / Arizona / Severe Thunderstorm Warnings in 2021
Severe Thunderstorm Warning 17, NWS Flagstaff, AZ
NWS Flagstaff, AZ issued this severe thunderstorm warning at Jul 9, 2021, 7:14 PM MDT for Navajo County, Arizona. It was in force for 46 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 9, 2021, 7:14 PM MDT (01:14 UTC)
- Expired
- Jul 9, 2021, 8:00 PM MDT
- In force
- 46 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), 75 km from the middle of the area, began a volume at 01:16 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 00:00Z, 1.2 hours before the alert went out and 152 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
- 49 J/kg
- Mixed-layer CIN
- -141 J/kg
- Mixed-layer LCL
- 3400 m above ground
- 0-6 km bulk shear
- 18 kt
- 0-1 km storm-relative helicity
- 49 m²/s²
- 0-3 km storm-relative helicity
- 85 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- -0.0
The text
As transmitted.
558
WUUS55 KFGZ 100114
SVRFGZ
AZC017-100200-
/O.NEW.KFGZ.SV.W.0017.210710T0114Z-210710T0200Z/
BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service Flagstaff AZ
614 PM MST Fri Jul 9 2021
The National Weather Service in Flagstaff has issued a
* Severe Thunderstorm Warning for...
Navajo County in north central Arizona...
* Until 700 PM MST.
* At 612 PM MST, a severe thunderstorm was located 9 miles northeast
of Aripine, or 26 miles northwest of Show Low, moving southwest at
15 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...
Aripine. Heber-Overgaard.
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 3463 11036 3451 11021 3433 11040 3445 11060
TIME...MOT...LOC 0112Z 042DEG 15KT 3452 11035
HAIL...1.00IN
WIND...60MPH
$$
JJ2 follow-up statements
829
WWUS55 KFGZ 100137
SVSFGZ
Severe Weather Statement
National Weather Service Flagstaff AZ
637 PM MST Fri Jul 9 2021
AZC017-100200-
/O.CON.KFGZ.SV.W.0017.000000T0000Z-210710T0200Z/
Navajo-
637 PM MST Fri Jul 9 2021
...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 700 PM MST
FOR NAVAJO COUNTY...
At 635 PM MST, a severe thunderstorm was located just north of
Aripine, or 22 miles northeast of Forest Lakes, moving southwest at
15 mph.
HAZARD...60 mph wind gusts and quarter size hail.
SOURCE...Radar indicated.
IMPACT...Hail damage to vehicles is expected. Expect wind damage to
roofs, siding, and trees.
Locations impacted include...
Aripine. Highways 277 and 377 northeast of Heber.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
For your protection move to an interior room on the lowest floor of a
building.
Torrential rainfall is occurring with this storm, and may lead to
flash flooding. Do not drive your vehicle through flooded roadways.
&&
LAT...LON 3459 11042 3447 11028 3435 11043 3445 11060
TIME...MOT...LOC 0135Z 054DEG 15KT 3448 11046
HAIL...1.00IN
WIND...60MPH
$$
JJ924
WWUS55 KFGZ 100202
SVSFGZ
Severe Weather Statement
National Weather Service Flagstaff AZ
702 PM MST Fri Jul 9 2021
AZC017-100211-
/O.EXP.KFGZ.SV.W.0017.000000T0000Z-210710T0200Z/
Navajo-
702 PM MST Fri Jul 9 2021
...THE SEVERE THUNDERSTORM WARNING FOR NAVAJO COUNTY HAS EXPIRED...
The storm which prompted the warning near Aripine and Heber has
weakened below severe limits. Therefore, the warning has been
allowed to expire. However gusty winds to 45 mph and heavy rain are
still occurring with this thunderstorm.
LAT...LON 3459 11042 3447 11028 3435 11043 3445 11060
TIME...MOT...LOC 0201Z 042DEG 15KT 3441 11053
$$
JJThe office that day
Everything else NWS Flagstaff, AZ issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jul 9, 6:00 PM MDT | Severe Thunderstorm Warning | FGZ | Yavapai | 45 min |
| Jul 9, 6:11 PM MDT | Special Weather Statement | FGZ | 34 min | |
| Jul 9, 6:21 PM MDT | Special Weather Statement | FGZ | Yavapai | 39 min |
| Jul 9, 6:32 PM MDT | Severe Thunderstorm Warning | FGZ | Navajo | 43 min |
| Jul 9, 6:40 PM MDT | Severe Thunderstorm Warning | FGZ | Yavapai | 35 min |
| Jul 9, 8:14 PM MDT | Special Weather Statement | FGZ | Gila | 46 min |
| Jul 10, 1:36 PM MDT | Special Weather Statement | FGZ | Apache | 24 min |
| Jul 10, 2:29 PM MDT | Areal Flood Advisory | FGZ | Apache | 2 hr |
| Jul 10, 2:38 PM MDT | Severe Thunderstorm Warning | FGZ | Coconino, Yavapai | 31 min |
| Jul 10, 2:57 PM MDT | Special Weather Statement | FGZ | 33 min | |
| Jul 10, 3:21 PM MDT | Severe Thunderstorm Warning | FGZ | Yavapai | 39 min |
| Jul 10, 3:40 PM MDT | Areal Flood Advisory | FGZ | Gila | 4 hr |
| Jul 10, 3:55 PM MDT | Special Weather Statement | FGZ | Yavapai | 50 min |
| Jul 10, 4:40 PM MDT | Areal Flood Advisory | FGZ | Yavapai | 3 hr |
| Jul 10, 5:18 PM MDT | Severe Thunderstorm Warning | FGZ | Gila | 27 min |
| Jul 10, 5:27 PM MDT | Severe Thunderstorm Warning | FGZ | Apache, Navajo | 48 min |
| Jul 10, 5:40 PM MDT | Flash Flood Warning | FGZ | Gila | 3 hr |
| Jul 10, 5:40 PM MDT | Severe Thunderstorm Warning | FGZ | Gila, Navajo | 50 min |
| Jul 10, 5:51 PM MDT | Severe Thunderstorm Warning | FGZ | Coconino, Yavapai | 24 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.