Alert archive / Arizona / Flash Flood Warnings in 2022
Flash Flood Warning 182, NWS Flagstaff, AZ
NWS Flagstaff, AZ issued this flash flood warning at Aug 12, 2022, 12:42 PM MST for Yavapai 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
- Aug 12, 2022, 12:42 PM MST (19:42 UTC)
- Expired
- Aug 12, 2022, 3:45 PM MST
- In force
- 3 hr
- Issued by
- NWS Flagstaff, AZ
- Area
- Storm-based polygon
- Damage threat
- Considerable
- Flood severity
- None
County Yavapai County, AZ
The radar
The Flagstaff radar (KFSX), 124 km from the middle of the area, began a volume at 19:45 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, 7.7 hours before the alert went out and 98 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
- 9 J/kg
- Mixed-layer CIN
- -392 J/kg
- Mixed-layer LCL
- 2754 m above ground
- 0-6 km bulk shear
- 2 kt
- 0-1 km storm-relative helicity
- -14 m²/s²
- 0-3 km storm-relative helicity
- -19 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 Aug 12, 9:25 AM MST, 3 hours 17 minutes earlier.
Area forecast discussion, Aug 12, 9:25 AM MST, 3 hours 17 minutes before
Area Forecast Discussion National Weather Service Flagstaff AZ 925 AM MST Fri Aug 12 2022 .SYNOPSIS...Daily showers and thunderstorms will continue across much of northern Arizona through the weekend. Scattered to widespread thunderstorms are likely each afternoon, with flash flooding being the main threat. && .UPDATE...Storms are already firing up over the San Francisco Peaks this morning, leading to heightened flash flooding fears over the area. Expect storms to significantly increase in coverage today, first over the high country, before spilling over into the low country. Avoid vulnerable areas, like normally-dry washes, slot canyons, drainages, streams, etc. Heavy rainfall may turn spots like these into raging torrents. && .PREV DISCUSSION /217 AM MST/...The active monsoon pattern is expected to continue for the days to come. As a result, another Flash Flood Watch is in place for 11 AM MST to 11 PM MST Friday. This watch includes most of our CWA with the exception of the northeastern portion of our state. This was largely decided based on model guidance and the Weather Prediction Center Excessive Rainfall Outlook for Day 1, where there was a slight risk for northern Arizona. There could be a need for additional Flash Flood Watches in our CWA past today, but there are none in place at this time. Over the weekend...Thunderstorm activity will continue to dominate during the afternoon hours, primarily thanks to daytime heating. The late evening/overnight hours will likely remain the less active portion of each day for the near future. Expect another few days of above average PW values and high surface dewpoints as moisture continues to funnel in from the south. At this time, there are no major indications by models of our monsoon activity declining for this forecast period. Beginning of next week...The high pressure system currently centered over the Oklahoma Panhandle is looking to shift westward toward the Pacific Northwest. This transition will be caused by a deepening trough on the east coast. Even with the change in our synoptic pattern, there will still be a southerly flow aloft, continuing to move moisture into Arizona. && AVIATION...For the 18Z TAF package..Expect widespread showers and thunderstorms into the early evening hours becoming isolated by midnight. VFR conditions and light surface winds away from storms. Aviation discussion not updated for TAF amendments. && FIRE WEATHER...The active monsoon pattern continues today and Saturday with widespread shower and thunderstorm coverage. The main threats include flash flooding and gusty, erratic outflow winds. Light winds expected outside of storms with little change in temperatures. Sunday through Tuesday...Daily shower and thunderstorm activity will continue. Look for light winds with little change in temperatures. && && .FGZ WATCHES/WARNINGS/ADVISORIES... Flood Watch through this evening for AZZ004>008-012>018-037-038- 104>108-112>118-137-138. && PUBLIC...BJ AVIATION...McCollum FIRE WEATHER...McCollum For Northern Arizona weather information visit weather.gov/flagstaff
In the hours before
Local storm report, Aug 12, 10:28 AM MST, 2 hours 14 minutes before
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</html>The office that day
Everything else NWS Flagstaff, AZ issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Aug 11, 5:20 PM MST | Flash Flood Warning | FGZ | Coconino | 5 hr |
| Aug 11, 5:38 PM MST | Flash Flood Warning | FGZ | Coconino | 3 hr |
| Aug 11, 6:22 PM MST | Flash Flood Warning | FGZ | Navajo | 3 hr |
| Aug 11, 6:39 PM MST | Flash Flood Warning | FGZ | Coconino, Navajo | 6 hr |
| Aug 11, 6:50 PM MST | Flash Flood Warning | FGZ | Coconino, Navajo | 3 hr |
| Aug 12, 1:30 AM MST | Flood Watch | FGZ | Apache, Coconino, Gila, Navajo, Yavapai | 22 hr |
| Aug 12, 10:53 AM MST | Flash Flood Warning | FGZ | Yavapai | 3 hr |
| Aug 12, 10:59 AM MST | Areal Flood Advisory | FGZ | Coconino | 3 hr |
| Aug 12, 11:24 AM MST | Flash Flood Warning | FGZ | Coconino | 3 hr |
| Aug 12, 11:46 AM MST | Flash Flood Warning | FGZ | Yavapai | 3 hr |
| Aug 12, 11:54 AM MST | Severe Thunderstorm Warning | FGZ | Yavapai | 36 min |
| Aug 12, 12:02 PM MST | Severe Thunderstorm Warning | FGZ | Coconino | 24 min |
| Aug 12, 12:36 PM MST | Severe Thunderstorm Warning | FGZ | Coconino | 39 min |
| Aug 12, 1:00 PM MST | Flash Flood Warning | FGZ | Yavapai | 3 hr |
| Aug 12, 1:10 PM MST | Flash Flood Warning | FGZ | Coconino | 3 hr |
| Aug 12, 1:29 PM MST | Flash Flood Warning | FGZ | Yavapai | 3 hr |
| Aug 12, 1:47 PM MST | Flood Watch | FGZ | Apache, Coconino, Gila, Navajo, Yavapai | 33 hr |
| Aug 12, 1:58 PM MST | Flash Flood Warning | FGZ | Coconino | 3 hr |
| Aug 12, 2:11 PM MST | Flash Flood Warning | FGZ | Coconino | 3 hr |
| Aug 12, 4:13 PM MST | Flash Flood Warning | FGZ | Yavapai | 3 hr |
| Aug 12, 4:36 PM MST | Flash Flood Warning | FGZ | Coconino, Navajo | 3 hr |
Nearby
Flash Flood Warnings in Arizona, 2022Every flash flood warning in 2022
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.