Alert archive / Arizona / Special Weather Statements in 2020
Special Weather Statement, NWS Flagstaff, AZ
NWS Flagstaff, AZ issued this special weather statement at Jul 23, 2020, 6:21 PM MDT for Navajo County, Arizona. It was in force for 39 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 23, 2020, 6:21 PM MDT (00:21 UTC)
- Expired
- Jul 23, 2020, 7:00 PM MDT
- In force
- 39 min
- Issued by
- NWS Flagstaff, AZ
County Navajo County, AZ
The radar
The Flagstaff radar (KFSX), 170 km from the middle of the area, began a volume at 00:23 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, 0.4 hours before the alert went out and 157 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
- 0 J/kg
- Mixed-layer CIN
- No buoyant parcel
- Mixed-layer LCL
- 2065 m above ground
- 0-6 km bulk shear
- 25 kt
- 0-1 km storm-relative helicity
- 46 m²/s²
- 0-3 km storm-relative helicity
- 32 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted.
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</html>What forecasters said that day
The local office's own words before this special weather statement 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 special weather statement went out at Jul 23, 3:33 PM MDT, 2 hours 48 minutes earlier.
Area forecast discussion, Jul 23, 3:33 PM MDT, 2 hours 48 minutes before
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<meta charset="utf-8">
<meta name="viewport" content="width=device-width, initial-scale=1">
<title>Service Notice</title>
<link rel="stylesheet" href="index.css">
</head>
<body>
<main class="wrap">
<section class="card" role="status" aria-live="polite">
<div class="status" id="status">Temporary Notice</div>
<h1 id="headline">This service is currently unavailable.</h1>
<p id="message1">
The site you requested is temporarily down for maintenance or an unexpected outage.
</p>
<p id="message2">
Please try again in a few minutes.
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If you are an administrator, restore upstream service and remove the redirect/fallback rule when normal operations resume.
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</html>In the hours before
Special weather statement, Jul 23, 2:07 PM MDT, 4 hours 14 minutes before
Special Weather Statement National Weather Service Flagstaff AZ 107 PM MST Thu Jul 23 2020 AZZ008-037-232030- Yavapai County Valleys and Basins-Yavapai County Mountains- 107 PM MST Thu Jul 23 2020 ...SIGNIFICANT WEATHER ADVISORY NORTH OF PRESCOTT VALLEY IN YAVAPAI COUNTY UNTIL 130 PM MST... At 107 PM MST, Doppler radar was tracking a strong thunderstorm near Yavapai County Fairgrounds, or 9 miles east of Chino Valley, moving north at 5 mph. Penny size hail and winds in excess of 30 mph will be possible with this storm. This storm will remain over mainly rural areas of Yavapai 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 3467 11222 3470 11238 3485 11235 3481 11214 TIME...MOT...LOC 2007Z 192DEG 4KT 3472 11230 TPS
Special weather statement, Jul 23, 2:35 PM MDT, 3 hours 46 minutes before
Special Weather Statement National Weather Service Flagstaff AZ 135 PM MST Thu Jul 23 2020 AZZ004-005-009-232115- Kaibab Plateau-Marble and Glen Canyons-Northeast Plateaus and Mesas Hwy 264 Northward- 135 PM MST Thu Jul 23 2020 ...SIGNIFICANT WEATHER ADVISORY NEAR MARBLE CANYON AND LEES FERRY IN COCONINO COUNTY UNTIL 215 PM MST/315 PM MDT/... At 134 PM MST/234 PM MDT/, Doppler radar was tracking a strong thunderstorm over Marble Canyon, or 13 miles southwest of Page, moving north at 25 mph. Nickel size hail and winds in excess of 40 mph will be possible with this storm. Locations impacted include... Lees Ferry, Wahweap and Marble Canyon. 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 3700 11147 3670 11152 3670 11173 3700 11179 TIME...MOT...LOC 2034Z 179DEG 20KT 3678 11163 TPS
Local storm report, Jul 23, 2:58 PM MDT, 3 hours 23 minutes before
PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE FLAGSTAFF AZ
158 PM MST THU JUL 23 2020
..TIME... ...EVENT... ...CITY LOCATION... ...LAT.LON...
..DATE... ....MAG.... ..COUNTY LOCATION..ST.. ...SOURCE....
..REMARKS..
0157 PM HEAVY RAIN VERNON 34.25N 109.69W
07/23/2020 M2.20 INCH APACHE AZ PUBLIC
MEMBER OF THE PUBLIC REPORTED 2.20 INCHES OF
RAINFALL IN JUST OVER AN HOUR EARLY THIS
AFTERNOON.
&&
TPSLocal storm report, Jul 23, 5:43 PM MDT, 38 minutes before
PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE FLAGSTAFF AZ
443 PM MST THU JUL 23 2020
..TIME... ...EVENT... ...CITY LOCATION... ...LAT.LON...
..DATE... ....MAG.... ..COUNTY LOCATION..ST.. ...SOURCE....
..REMARKS..
0425 PM HEAVY RAIN FOREST LAKES 34.34N 110.80W
07/23/2020 M0.82 INCH COCONINO AZ TRAINED SPOTTER
0.82 INCHES OF RAINFALL IN 25 MINUTES ENDING
4:15 PM.
&&
41Special weather statement, Jul 23, 5:46 PM MDT, 35 minutes before
Special Weather Statement National Weather Service Flagstaff AZ 446 PM MST Thu Jul 23 2020 AZZ008-037-240015- Yavapai County Valleys and Basins-Yavapai County Mountains- 446 PM MST Thu Jul 23 2020 ...SIGNIFICANT WEATHER ADVISORY FOR YAVAPAI COUNTY NEAR IRON SPRINGS UNTIL 515 PM MST... At 445 PM MST, Doppler radar was tracking a strong thunderstorm near Iron Springs, or 14 miles west of Prescott Valley, moving north at 10 mph. Penny size hail and wind gusts up to 45 mph will be possible with this storm. Locations impacted include... Skull Valley and Iron Springs. 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. && LAT...LON 3449 11259 3450 11271 3465 11270 3463 11255 TIME...MOT...LOC 2345Z 199DEG 7KT 3457 11264 MCT
Special weather statement, Jul 23, 6:21 PM MDT, 0 minutes before
Special Weather Statement National Weather Service Flagstaff AZ 621 PM MDT Thu Jul 23 2020 AZZ009-039-040-240100- Black Mesa Area-Northeast Plateaus and Mesas Hwy 264 Northward- Northeast Plateaus and Mesas South of Hwy 264- 621 PM MDT Thu Jul 23 2020 ...SIGNIFICANT WEATHER ADVISORY FOR NAVAJO COUNTY UNTIL 700 PM MDT/600 PM MST/... At 620 PM MDT/520 PM MST/, Doppler radar was tracking strong thunderstorms along a line extending from near Keams Canyon to 11 miles southwest of First Mesa. Movement was north at 10 mph. Half inch hail and winds in excess of 40 mph will be possible with these storms. Locations impacted include... Keams Canyon, First Mesa, Low Mountain, Jadito, Hard Rock, Whippoorwill Chapter House, Jeddito, Navajo, Second Mesa, Polacca, Shongopovi and Hopi Reservation. PRECAUTIONARY/PREPAREDNESS ACTIONS... Frequent cloud to ground lightning is occurring with these storms. Lightning can strike 10 miles away from a thunderstorm. Seek a safe shelter inside a building or vehicle. && LAT...LON 3608 11003 3605 11055 3564 11066 3568 11011 TIME...MOT...LOC 0020Z 198DEG 10KT 3585 11023 3574 11055 MCT
The office that day
Everything else NWS Flagstaff, AZ issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jul 23, 6:00 PM MDT | Areal Flood Advisory | FGZ | Coconino | 3 hr |
| Jul 23, 7:25 PM MDT | Special Weather Statement | FGZ | Yavapai | 20 min |
| Jul 23, 8:16 PM MDT | Special Weather Statement | FGZ | Yavapai | 29 min |
| Jul 23, 8:29 PM MDT | Areal Flood Advisory | FGZ | Yavapai | 118 min |
| Jul 23, 9:49 PM MDT | Flash Flood Warning | FGZ | Yavapai | 107 min |
Nearby
Special Weather Statements in Arizona, 2020Every special weather statement in 2020
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.