Alert archive / Arizona / Special Weather Statements in 2021
Special Weather Statement, NWS Flagstaff, AZ
NWS Flagstaff, AZ issued this special weather statement at Aug 1, 2021, 3:21 PM MST. It was in force for 24 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
- Aug 1, 2021, 3:21 PM MST (22:21 UTC)
- Expired
- Aug 1, 2021, 3:45 PM MST
- In force
- 24 min
- Issued by
- NWS Flagstaff, AZ
The radar
The Flagstaff radar (KFSX), 65 km from the middle of the area, began a volume at 22:22 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, 10.4 hours before the alert went out and 62 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
- 74 J/kg
- Mixed-layer CIN
- -65 J/kg
- Mixed-layer LCL
- 1273 m above ground
- 0-6 km bulk shear
- 22 kt
- 0-1 km storm-relative helicity
- 43 m²/s²
- 0-3 km storm-relative helicity
- 71 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted.
660 WWUS85 KFGZ 012221 SPSFGZ Special Weather Statement National Weather Service Flagstaff AZ 321 PM MST Sun Aug 1 2021 AZZ012-015-012245- Little Colorado River Valley in Coconino County-Western Mogollon Rim- 321 PM MST Sun Aug 1 2021 ...A LINE OF THUNDERSTORMS WILL GRADUALLY MOVE SOUTHEAST ALONG I-40 BETWEEN TWIN ARROWS AND TWO GUNS UNTIL 345 PM ARIZONA TIME... At 319 PM Arizona time, Doppler radar was tracking a line of strong thunderstorms moving east of Twin Arrows along I-40. Pea size hail and winds in excess of 30 mph will be possible with these storms. Locations impacted include... Two Guns, Rimmy Jims, Twin Arrows, and Meteor Crater. PRECAUTIONARY/PREPAREDNESS ACTIONS... Torrential rainfall is also occurring with these storms, and may lead to localized flooding. Do not drive your vehicle through flooded roadways. && LAT...LON 3529 11105 3492 11095 3498 11125 3531 11131 TIME...MOT...LOC 2219Z 307DEG 6KT 3525 11126 3501 11121 $$ TM
The office that day
Everything else NWS Flagstaff, AZ issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jul 31, 5:22 PM MST | Areal Flood Advisory | FGZ | Yavapai | 113 min |
| Jul 31, 6:08 PM MST | Areal Flood Advisory | FGZ | Apache, Navajo | 3 hr |
| Aug 1, 12:03 PM MST | Special Weather Statement | FGZ | 27 min | |
| Aug 1, 12:15 PM MST | Special Weather Statement | FGZ | 30 min | |
| Aug 1, 12:53 PM MST | Special Weather Statement | FGZ | Coconino | 22 min |
| Aug 1, 1:08 PM MST | Special Weather Statement | FGZ | 22 min | |
| Aug 1, 1:14 PM MST | Special Weather Statement | FGZ | 31 min | |
| Aug 1, 1:30 PM MST | Special Weather Statement | FGZ | Navajo | 30 min |
| Aug 1, 1:38 PM MST | Special Weather Statement | FGZ | Coconino | 22 min |
| Aug 1, 1:53 PM MST | Special Weather Statement | FGZ | 37 min | |
| Aug 1, 2:03 PM MST | Special Weather Statement | FGZ | Navajo | 27 min |
| Aug 1, 2:26 PM MST | Special Weather Statement | FGZ | Navajo | 34 min |
| Aug 1, 2:55 PM MST | Special Weather Statement | FGZ | 35 min | |
| Aug 1, 3:12 PM MST | Special Weather Statement | FGZ | 33 min | |
| Aug 1, 3:15 PM MST | Special Weather Statement | FGZ | 30 min | |
| Aug 1, 3:58 PM MST | Flash Flood Warning | FGZ | Gila, Navajo | 3 hr |
| Aug 1, 4:18 PM MST | Areal Flood Advisory | FGZ | Coconino | 3 hr |
| Aug 1, 4:24 PM MST | Special Weather Statement | FGZ | 51 min | |
| Aug 1, 4:38 PM MST | Severe Thunderstorm Warning | FGZ | Apache, Navajo | 37 min |
| Aug 1, 4:51 PM MST | Flash Flood Warning | FGZ | Gila, Navajo | 3 hr |
| Aug 1, 4:52 PM MST | Flash Flood Warning | FGZ | Apache, Coconino, Navajo | 3 hr |
Nearby
Special Weather Statements in Arizona, 2021Every special weather statement 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.