Alert archive / Arizona / Severe Thunderstorm Warnings in 2019
Severe Thunderstorm Warning 24, NWS Flagstaff, AZ
NWS Flagstaff, AZ issued this severe thunderstorm warning at Aug 3, 2019, 2:30 PM MST for Yavapai County, Arizona. It was in force for 45 min. No storm report in the archive falls inside the area while it was in force.
The area
The counties it named.
The facts
- Issued
- Aug 3, 2019, 2:30 PM MST (21:30 UTC)
- Expired
- Aug 3, 2019, 3:15 PM MST
- In force
- 45 min
- Issued by
- NWS Flagstaff, AZ
- Area
- Storm-based polygon
- Hail
- 1.0 in
- Wind
- 60.0 mph
County Yavapai County, AZ
The radar
The Flagstaff radar (KFSX), 124 km from the middle of the area, began a volume at 21:32 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
Phoenix, AZ (KPSR), launched 12:00Z, 9.5 hours before the alert went out and 141 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
- 206 J/kg
- Mixed-layer CIN
- -376 J/kg
- Mixed-layer LCL
- 2943 m above ground
- 0-6 km bulk shear
- 14 kt
- 0-1 km storm-relative helicity
- 38 m²/s²
- 0-3 km storm-relative helicity
- 33 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
What forecasters said that day
The local office's own words before this severe thunderstorm warning went out, as it sent them, from the Iowa Environmental Mesonet's archive of National Weather Service text.
NWS Flagstaff, AZ wrote its last area forecast discussion before this severe thunderstorm warning went out at Aug 3, 9:46 AM MST, 4 hours 44 minutes earlier.
Area forecast discussion, Aug 3, 9:46 AM MST, 4 hours 44 minutes before
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</html>In the hours before
Special weather statement, Aug 3, 12:11 PM MST, 2 hours 19 minutes before
Special Weather Statement
National Weather Service Flagstaff AZ
111 PM MDT Sat Aug 3 2019
AZZ011-032000-
Chuska Mountains and Defiance Plateau-
111 PM MDT Sat Aug 3 2019
...SIGNIFICANT WEATHER ADVISORY FOR APACHE COUNTY UNTIL 200 PM MDT...
At 109 PM MDT, Doppler radar was tracking a cluster of strong
thunderstorms 10 miles southeast of Kinlichee Chapter House, or 32
miles west of Gallup, moving northeast at 15 mph.
Pea size hail and winds in excess of 30 mph will be possible with
this storm.
Locations impacted include...
Fort Defiance, Window Rock, St. Michaels and Sawmill.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
Torrential rainfall is also occurring with this storm, and may lead
to localized flooding. Do not drive your vehicle through flooded
roadways.
Frequent cloud to ground lightning is occurring with this storm.
Lightning can strike 10 miles away from a thunderstorm. Seek a safe
shelter inside a building or vehicle.
&&
LAT...LON 3548 10907 3560 10941 3595 10925 3585 10904
3556 10905
TIME...MOT...LOC 1909Z 211DEG 12KT 3568 10927
JDSSpecial weather statement, Aug 3, 1:14 PM MST, 1 hour 16 minutes before
Special Weather Statement National Weather Service Flagstaff AZ 114 PM MST Sat Aug 3 2019 AZZ013-014-016-017-032100- Little Colorado River Valley in Navajo County-Little Colorado River Valley in Apache County-White Mountains-Eastern Mogollon Rim- 114 PM MST Sat Aug 3 2019 ...SIGNIFICANT WEATHER ADVISORY FOR APACHE AND NAVAJO COUNTIES UNTIL 200 PM MST... At 114 PM MST, Doppler radar was tracking a strong thunderstorm 8 miles east of Show Low, moving north at 15 mph. Penny size hail and winds in excess of 40 mph will be possible with this storm. Locations impacted include... White Mountain Lake. PRECAUTIONARY/PREPAREDNESS ACTIONS... Torrential rainfall is also occurring with this storm, and may lead to localized flooding. Do not drive your vehicle through flooded roadways. Frequent cloud to ground lightning is occurring with this storm. Lightning can strike 10 miles away from a thunderstorm. Seek a safe shelter inside a building or vehicle. && LAT...LON 3424 10981 3421 10999 3443 11005 3444 10988 TIME...MOT...LOC 2014Z 164DEG 11KT 3431 10992 JDS
Special weather statement, Aug 3, 1:55 PM MST, 35 minutes before
Special Weather Statement National Weather Service Flagstaff AZ 155 PM MST Sat Aug 3 2019 AZZ016-032145- Eastern Mogollon Rim- 155 PM MST Sat Aug 3 2019 ...SIGNIFICANT WEATHER ADVISORY FOR NAVAJO COUNTY UNTIL 245 PM MST... At 155 PM MST, Doppler radar was tracking a strong thunderstorm 8 miles south of Aripine, or 20 miles east of Forest Lakes, moving northeast at 5 mph. Penny size hail and wind gusts up to 50 mph will be possible with this storm. Locations impacted include... Clay Springs and Aripine. LAT...LON 3417 11042 3428 11058 3442 11045 3436 11026 TIME...MOT...LOC 2055Z 219DEG 5KT 3428 11045 JDS
Special weather statement, Aug 3, 2:14 PM MST, 16 minutes before
Special Weather Statement National Weather Service Flagstaff AZ 214 PM MST Sat Aug 3 2019 AZZ013-032200- Little Colorado River Valley in Navajo County- 214 PM MST Sat Aug 3 2019 ...SIGNIFICANT WEATHER ADVISORY FOR NAVAJO COUNTY UNTIL 300 PM MST... At 213 PM MST, Doppler radar was tracking a strong thunderstorm 11 miles south of Woodruff, or 27 miles north of Show Low, moving northwest at 10 mph. Nickel size hail and wind gusts up to 50 mph will be possible with this storm. Locations impacted include... Snowflake. PRECAUTIONARY/PREPAREDNESS ACTIONS... Torrential rainfall is also occurring with this storm, and may lead to localized flooding. Do not drive your vehicle through flooded roadways. Frequent cloud to ground lightning is occurring with this storm. Lightning can strike 10 miles away from a thunderstorm. Seek a safe shelter inside a building or vehicle. && LAT...LON 3458 10996 3449 11014 3467 11028 3480 11008 TIME...MOT...LOC 2113Z 150DEG 11KT 3463 11012 JDS
The office that day
Everything else NWS Flagstaff, AZ issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Aug 2, 5:25 PM MST | Flash Flood Warning | FGZ | Yavapai | 3 hr |
| Aug 2, 6:07 PM MST | Special Weather Statement | FGZ | 38 min | |
| Aug 2, 6:12 PM MST | Flash Flood Warning | FGZ | Yavapai | 3 hr |
| Aug 2, 6:27 PM MST | Severe Thunderstorm Warning | FGZ | Yavapai | 37 min |
| Aug 2, 7:02 PM MST | Special Weather Statement | FGZ | Yavapai | 28 min |
| Aug 2, 7:09 PM MST | Flash Flood Warning | FGZ | Coconino | 3 hr |
| Aug 3, 12:11 PM MST | Special Weather Statement | FGZ | Apache | 49 min |
| Aug 3, 1:14 PM MST | Special Weather Statement | FGZ | 46 min | |
| Aug 3, 1:28 PM MST | Flash Flood Warning | FGZ | Yavapai | 3 hr |
| Aug 3, 1:55 PM MST | Special Weather Statement | FGZ | 50 min | |
| Aug 3, 2:14 PM MST | Special Weather Statement | FGZ | 46 min | |
| Aug 3, 3:25 PM MST | Severe Thunderstorm Warning | FGZ | Yavapai | 35 min |
| Aug 3, 4:19 PM MST | Flash Flood Warning | FGZ | Gila | 3 hr |
| Aug 3, 4:29 PM MST | Flash Flood Warning | FGZ | Gila | 3 hr |
Nearby
Severe Thunderstorm Warnings in Arizona, 2019Every severe thunderstorm warning in 2019
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.