Alert archive / Arizona / Flash Flood Warnings in 2019
Flash Flood Warning 57, NWS Flagstaff, AZ
NWS Flagstaff, AZ issued this flash flood warning at Sep 1, 2019, 12:58 PM MST for Apache County, Navajo County, Arizona. It was in force for 3 hr. No storm report in the archive falls inside the area while it was in force.
The area
The counties it named.
The facts
- Issued
- Sep 1, 2019, 12:58 PM MST (19:58 UTC)
- Expired
- Sep 1, 2019, 3:48 PM MST
- In force
- 3 hr
- Issued by
- NWS Flagstaff, AZ
- Area
- Storm-based polygon
- Flood severity
- None
Counties Apache County, AZ, Navajo County, AZ
The radar
The Flagstaff radar (KFSX), 149 km from the middle of the area, began a volume at 20:02 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, 8.0 hours before the alert went out and 173 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
- 3349 m above ground
- 0-6 km bulk shear
- 8 kt
- 0-1 km storm-relative helicity
- -12 m²/s²
- 0-3 km storm-relative helicity
- 15 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
What forecasters said that day
The local office's own words before this flash flood 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 flash flood warning went out at Sep 1, 9:23 AM MST, 3 hours 35 minutes earlier.
Area forecast discussion, Sep 1, 9:23 AM MST, 3 hours 35 minutes before
<!doctype html>
<html lang="en">
<head>
<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.
</p>
<p class="small" id="detail">
If you are an administrator, restore upstream service and remove the redirect/fallback rule when normal operations resume.
</p>
</section>
</main>
<script src="index.js"></script>
</body>
</html>In the hours before
Special weather statement, Sep 1, 11:56 AM MST, 1 hour 2 minutes before
Special Weather Statement National Weather Service Flagstaff AZ 1156 AM MST Sun Sep 1 2019 AZZ017-011930- White Mountains- 1156 AM MST Sun Sep 1 2019 ...SIGNIFICANT WEATHER ADVISORY FOR APACHE AND NAVAJO COUNTIES UNTIL 1230 PM MST... At 1155 AM MST, Doppler radar was tracking a strong thunderstorm 11 miles east of North Fork, or 24 miles southeast of Show Low, moving west at 10 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 Apache and Navajo Counties, including the following locations... Mcnary. LAT...LON 3379 10982 3410 10986 3403 10966 3397 10957 TIME...MOT...LOC 1855Z 088DEG 8KT 3396 10977 41
Special weather statement, Sep 1, 12:21 PM MST, 37 minutes before
Special Weather Statement National Weather Service Flagstaff AZ 1221 PM MST Sun Sep 1 2019 AZZ017-012000- White Mountains- 1221 PM MST Sun Sep 1 2019 ...SIGNIFICANT WEATHER ADVISORY FOR APACHE AND NAVAJO COUNTIES UNTIL 100 PM MST... At 1217 PM MST, Doppler radar was tracking a strong thunderstorm 10 miles northeast of White River. Penny size hail and winds in excess of 30 mph will be possible with this storm. This storm is over the Diamond Creek and Little Diamond Creek basins. It is expected to affect Highway 73 north of White River. 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 3401 10968 3387 10967 3384 10994 3402 10996 TIME...MOT...LOC 1917Z 073DEG 8KT 3391 10980 41
The office that day
Everything else NWS Flagstaff, AZ issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Sep 1, 11:56 AM MST | Special Weather Statement | FGZ | 34 min | |
| Sep 1, 12:21 PM MST | Special Weather Statement | FGZ | 39 min | |
| Sep 1, 1:38 PM MST | Special Weather Statement | FGZ | 37 min | |
| Sep 1, 1:58 PM MST | Special Weather Statement | FGZ | 47 min | |
| Sep 1, 2:22 PM MST | Severe Thunderstorm Warning | FGZ | Gila | 23 min |
| Sep 1, 2:29 PM MST | Special Weather Statement | FGZ | 46 min | |
| Sep 1, 2:34 PM MST | Flash Flood Warning | FGZ | Gila, Navajo | 3 hr |
| Sep 1, 2:48 PM MST | Severe Thunderstorm Warning | FGZ | Yavapai | 27 min |
| Sep 1, 3:02 PM MST | Severe Thunderstorm Warning | FGZ | Gila | 18 min |
| Sep 1, 3:24 PM MST | Areal Flood Advisory | FGZ | Gila | 3 hr |
| Sep 1, 3:40 PM MST | Special Weather Statement | FGZ | Gila | 50 min |
| Sep 1, 3:54 PM MST | Special Weather Statement | FGZ | 51 min | |
| Sep 1, 3:59 PM MST | Severe Thunderstorm Warning | FGZ | Gila, Yavapai | 46 min |
| Sep 1, 4:19 PM MST | Special Weather Statement | FGZ | Yavapai | 41 min |
Nearby
Flash Flood Warnings in Arizona, 2019Every flash flood 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.