Alert archive / Arizona / Severe Thunderstorm Warnings in 2018
Severe Thunderstorm Warning 56, NWS Flagstaff, AZ
NWS Flagstaff, AZ issued this severe thunderstorm warning at Jul 30, 2018, 2:33 PM MST for Gila County, Arizona. It was in force for 28 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
- Jul 30, 2018, 2:33 PM MST (21:33 UTC)
- Expired
- Jul 30, 2018, 3:01 PM MST
- In force
- 28 min
- Issued by
- NWS Flagstaff, AZ
- Area
- Storm-based polygon
- Hail
- 1.25 in
- Wind
- 60.0 mph
County Gila County, AZ
The radar
The Flagstaff radar (KFSX), 93 km from the middle of the area, began a volume at 21:35 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, 9.6 hours before the alert went out and 115 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
- 884 J/kg
- Mixed-layer CIN
- -290 J/kg
- Mixed-layer LCL
- 2128 m above ground
- 0-6 km bulk shear
- 8 kt
- 0-1 km storm-relative helicity
- -2 m²/s²
- 0-3 km storm-relative helicity
- 46 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 Jul 30, 9:16 AM MST, 5 hours 17 minutes earlier.
Area forecast discussion, Jul 30, 9:16 AM MST, 5 hours 17 minutes before
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</html>In the hours before
Special weather statement, Jul 30, 12:19 PM MST, 2 hours 14 minutes before
Special Weather Statement
National Weather Service Flagstaff AZ
1219 PM MST MON JUL 30 2018
AZZ011-014-040-302000-
Chuska Mountains and Defiance Plateau-
Little Colorado River Valley in Apache County-
Northeast Plateaus and Mesas South of Hwy 264-
1219 PM MST MON JUL 30 2018
...STRONG THUNDERSTORM NEAR HOUCK THROUGH 100 PM MST...
At 1217 PM MST, Doppler radar was tracking a strong thunderstorm near
Houck, or 28 miles northwest of Zuni Pueblo, moving southeast at 15
mph.
Half inch hail and winds in excess of 40 mph will be possible with
this storm.
Locations impacted include...
Houck and Sanders. I-40 between Sanders and Houck.
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 3508 10932 3529 10941 3540 10922 3523 10905
3519 10904
TIME...MOT...LOC 1917Z 328DEG 14KT 3529 10928
TPSSpecial weather statement, Jul 30, 1:48 PM MST, 45 minutes before
Special Weather Statement National Weather Service Flagstaff AZ 148 PM MST MON JUL 30 2018 AZZ016-018-302130- Northern Gila County-Eastern Mogollon Rim- 148 PM MST MON JUL 30 2018 ...SIGNIFICANT WEATHER ADVISORY FOR GILA AND NAVAJO COUNTIES UNTIL 230 PM MST... At 147 PM MST, Doppler radar was tracking a strong thunderstorm 14 miles west of Carrizo, or 28 miles southeast of Forest Lakes, moving southwest at 10 mph. Nickel size hail and winds in excess of 40 mph will be possible with this storm. This storm will remain over mainly rural areas of Gila and Navajo Counties. 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 3404 11055 3398 11045 3385 11053 3395 11071 TIME...MOT...LOC 2047Z 036DEG 7KT 3399 11054 TPS
Special weather statement, Jul 30, 2:12 PM MST, 21 minutes before
Special Weather Statement
National Weather Service Flagstaff AZ
212 PM MST MON JUL 30 2018
AZZ018-302200-
Northern Gila County-
212 PM MST MON JUL 30 2018
...SEVERE THUNDERSTORM SOUTH OF CARRIZO MOVING SLOWLY SOUTH THROUGH
300 PM MST...
At 211 PM MST, Doppler radar was tracking a strong thunderstorm over
Carrizo, or 23 miles southwest of Show Low. This storm is
moving south at 5 to 10 mph.
Dime size hail and winds in excess of 40 mph will be possible with
this storm.
This storm will remain over mainly rural areas of Gila County.
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 3383 11032 3383 11034 3392 11047 3400 11030
3395 11021 3380 11030
TIME...MOT...LOC 2111Z 029DEG 2KT 3397 11029
TPSSpecial weather statement, Jul 30, 2:16 PM MST, 17 minutes before
Special Weather Statement National Weather Service Flagstaff AZ 216 PM MST MON JUL 30 2018 AZZ016-018-302200- Northern Gila County-Eastern Mogollon Rim- 216 PM MST MON JUL 30 2018 ...SIGNIFICANT WEATHER ADVISORY FOR GILA AND NAVAJO COUNTIES UNTIL 300 PM MST... At 215 PM MST, Doppler radar was tracking a strong thunderstorm 12 miles southeast of Young, or 22 miles south of Forest Lakes, moving southwest at 5 mph. Nickel size hail and wind gusts up to 50 mph will be possible with this storm. This storm will remain over mainly rural areas of Gila and Navajo Counties. 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 3408 11078 3401 11066 3383 11064 3393 11091 TIME...MOT...LOC 2115Z 026DEG 6KT 3401 11075 TPS
The office that day
Everything else NWS Flagstaff, AZ issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jul 30, 12:19 PM MST | Special Weather Statement | FGZ | Apache | 41 min |
| Jul 30, 1:48 PM MST | Special Weather Statement | FGZ | Gila | 42 min |
| Jul 30, 2:12 PM MST | Special Weather Statement | FGZ | Gila | 48 min |
| Jul 30, 2:16 PM MST | Special Weather Statement | FGZ | Gila | 44 min |
| Jul 30, 3:00 PM MST | Severe Thunderstorm Warning | FGZ | Gila | 22 min |
| Jul 30, 3:48 PM MST | Severe Thunderstorm Warning | FGZ | Coconino, Gila, Yavapai | 22 min |
| Jul 30, 3:52 PM MST | Special Weather Statement | FGZ | Yavapai | 38 min |
| Jul 30, 4:21 PM MST | Special Weather Statement | FGZ | 24 min | |
| Jul 30, 4:30 PM MST | Severe Thunderstorm Warning | FGZ | Coconino, Gila | 30 min |
| Jul 30, 4:43 PM MST | Flash Flood Warning | FGZ | Gila | 3 hr |
| Jul 30, 4:57 PM MST | Severe Thunderstorm Warning | FGZ | Gila, Yavapai | 48 min |
Nearby
Severe Thunderstorm Warnings in Arizona, 2018Every severe thunderstorm warning in 2018
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.