Alert archive / Arizona / Flash Flood Warnings in 2022
Flash Flood Warning 106, NWS Tucson, AZ
NWS Tucson, AZ issued this flash flood warning at Aug 19, 2022, 4:36 PM MST for Pima County, Arizona. It was in force for 114 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 19, 2022, 4:36 PM MST (23:36 UTC)
- Expired
- Aug 19, 2022, 6:30 PM MST
- In force
- 114 min
- Issued by
- NWS Tucson, AZ
- Area
- Storm-based polygon
- Damage threat
- Considerable
- Flood severity
- None
County Pima County, AZ
The radar
The Tucson radar (KEMX), 112 km from the middle of the area, began a volume at 23:39 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
Tuscon, AZ (KTUS), launched 12:00Z, 11.6 hours before the alert went out and 84 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
- 1115 J/kg
- Mixed-layer CIN
- -19 J/kg
- Mixed-layer LCL
- 824 m above ground
- 0-6 km bulk shear
- 7 kt
- 0-1 km storm-relative helicity
- 28 m²/s²
- 0-3 km storm-relative helicity
- 65 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 Tucson, AZ wrote its last area forecast discussion before this flash flood warning went out at Aug 19, 2:00 PM MST, 2 hours 36 minutes earlier.
Area forecast discussion, Aug 19, 2:00 PM MST, 2 hours 36 minutes before
Area Forecast Discussion
National Weather Service Tucson AZ
200 PM MST Fri Aug 19 2022
.SYNOPSIS...Shower and thunderstorm chances will continue into
next week with an uptick in activity today through the weekend.
The main threats will be strong gusty winds and heavy rainfall
especially today through Saturday, with rainfall amounts peaking
later today into Saturday. Otherwise, temperatures will be 5-10
degrees below normal into early next week.
&&
.DISCUSSION...Scattered showers and thunderstorms, mainly focused
across Pinal, central and eastern Pima counties so far today, will
continue to impact much of SE AZ through Saturday. Several flash
flood/flood related advisories and warnings have already been issued
with more expected as a Flood Watch remains in effect until Saturday
evening. Deep moisture associated with a low pressure system that
had tropical origin can be attributed to this extended period of
rainfall and flash flood/flood threat. This weather scenario can be
considered rather rare as this low pressure system appeared to
maintain some form of a low level circulation as it tracked westward
over the landmass of northern Mexico this week. The circulation will
remain over the northern Gulf of California through tonight where
sea surface temperatures have been running around 85 to near 90
degrees. It will be interesting to see how this very warm water will
influence the strength of the system through early Saturday. At any
rate, no big changes to the current forecast in terms of the flood
threat through Saturday evening. There will likely be some lingering
showers and thunderstorms through the early morning hours on Sunday.
That said, the Flood Watch might be extended in time to highlight
the continued threat during the Saturday overnight/early Sunday
morning hours. For now, will wait and see how things evolve tonight
and Saturday before extending the watch. Otherwise, models
eventually eject this low NE across far SE AZ on Sunday as it gets
picked up by another low tracking through the Great Basin. In the
wake of this low, there will be a noticeable decrease in rain
chances by Sunday evening into Monday. However, this decrease in
shower and thunderstorm activity might be brief as ensembles
suggested another uptick as early as Tuesday but more so Wednesday.
Daytime temperatures will warm back to near seasonable readings
after this weekend.
&&
.AVIATION...Valid through 21/00Z.
Periods of rain showers and a few thunderstorms will impact the
terminals through the forecast period. Some of the heavier showers
and thunderstorms will reduced visibilities in downpours with CIGS
below 5kt AGL and/or wind gusts of 40+ kts. Otherwise, winds
following diurnal trends at speeds of 10kts or less can be expected.
Aviation discussion not updated for TAF amendments.
&&
.FIRE WEATHER...Monsoonal thunderstorm activity will remain elevated
through the weekend with rounds of showers and thunderstorms
expected each day. Primary threats include strong winds, lightning,
and flash flooding. Outside of thunderstorm activity, wind trends
will remain light and follow typical diurnal trends.
&&
.TWC WATCHES/WARNINGS/ADVISORIES...
Flood Watch through Saturday evening for AZZ501>515.
&&
Visit us on Facebook...Twitter...YouTube...and at weather.gov/TucsonIn the hours before
Local storm report, Aug 19, 1:56 PM MST, 2 hours 40 minutes before
PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE TUCSON AZ
156 PM MST FRI AUG 19 2022
..TIME... ...EVENT... ...CITY LOCATION... ...LAT.LON...
..DATE... ....MAG.... ..COUNTY LOCATION..ST.. ...SOURCE....
..REMARKS..
0153 PM FLASH FLOOD 3 WSW MARANA 32.39N 111.22W
08/19/2022 PIMA AZ COUNTY OFFICIAL
TWIN PEAKS ROAD IS SHUT DOWN BETWEEN
SANDARIO AND SILVERBELL AND SANDARIO IS SHUT
DOWN BETWEEN TWIN PEAKS AND AVRA VALLEY DUE
TO FLASH FLOODING.
&&
MJSLocal storm report, Aug 19, 3:29 PM MST, 1 hour 7 minutes before
PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE TUCSON AZ
329 PM MST FRI AUG 19 2022
..TIME... ...EVENT... ...CITY LOCATION... ...LAT.LON...
..DATE... ....MAG.... ..COUNTY LOCATION..ST.. ...SOURCE....
..REMARKS..
1220 PM HEAVY RAIN 2 SSE ORO VALLEY 32.39N 110.95W
08/19/2022 E2.87 INCH PIMA AZ PUBLIC
2 AND 7/8 INCH OF RAIN BETWEEN 11:00AM AND
12:20PM.
&&
GRGLocal storm report, Aug 19, 3:31 PM MST, 1 hour 5 minutes before
PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE TUCSON AZ
331 PM MST FRI AUG 19 2022
..TIME... ...EVENT... ...CITY LOCATION... ...LAT.LON...
..DATE... ....MAG.... ..COUNTY LOCATION..ST.. ...SOURCE....
..REMARKS..
0320 PM FLASH FLOOD PICTURE ROCKS 32.35N 111.25W
08/19/2022 PIMA AZ BROADCAST MEDIA
SCHOOL BUS PARTIALLY TIPPED OVER IN A
FLOODED WASH IN PICTURE ROCKS. ALL 41 PEOPLE
(39 STUDENTS AND 2 DRIVERS) ARE SAFE.
&&
GRGLocal storm report, Aug 19, 3:50 PM MST, 46 minutes before
PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE TUCSON AZ
350 PM MST FRI AUG 19 2022
..TIME... ...EVENT... ...CITY LOCATION... ...LAT.LON...
..DATE... ....MAG.... ..COUNTY LOCATION..ST.. ...SOURCE....
..REMARKS..
0245 PM HEAVY RAIN 1 ENE GREEN VALLEY 31.86N 110.99W
08/19/2022 E0.54 INCH PIMA AZ TRAINED SPOTTER
0.54 INCHES OF RAIN ROUGHLY BETWEEN 2:15 AND
2:45PM.
&&
GRGLocal storm report, Aug 19, 4:23 PM MST, 13 minutes before
PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE TUCSON AZ
423 PM MST FRI AUG 19 2022
..TIME... ...EVENT... ...CITY LOCATION... ...LAT.LON...
..DATE... ....MAG.... ..COUNTY LOCATION..ST.. ...SOURCE....
..REMARKS..
0420 PM FLASH FLOOD 7 SSE PICTURE ROCKS 32.25N 111.22W
08/19/2022 PIMA AZ BROADCAST MEDIA
SANDARIO IS STILL CLOSED FROM TWIN PEAKS AND
AVRA VALLEY DUE TO FLOODING.
&&
GRGLocal storm report, Aug 19, 4:26 PM MST, 10 minutes before
PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE TUCSON AZ
426 PM MST FRI AUG 19 2022
..TIME... ...EVENT... ...CITY LOCATION... ...LAT.LON...
..DATE... ....MAG.... ..COUNTY LOCATION..ST.. ...SOURCE....
..REMARKS..
0425 PM FLASH FLOOD 3 NW MARANA 32.45N 111.21W
08/19/2022 PIMA AZ PUBLIC
ALL MARANA PARKS & RECREATION FIELDS ARE
CLOSED DUE TO THE RAINS/FLOODING.
&&
GRGThe office that day
Everything else NWS Tucson, AZ issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Aug 18, 10:22 PM MST | Areal Flood Advisory | TWC | Pima | 113 min |
| Aug 19, 10:24 AM MST | Areal Flood Advisory | TWC | Pima | 12 min |
| Aug 19, 10:36 AM MST | Flash Flood Warning | TWC | Pima | 114 min |
| Aug 19, 11:21 AM MST | Areal Flood Advisory | TWC | Pima | 114 min |
| Aug 19, 11:38 AM MST | Areal Flood Advisory | TWC | Pima | 31 min |
| Aug 19, 11:59 AM MST | Areal Flood Advisory | TWC | Cochise, Graham | 2 hr |
| Aug 19, 12:03 PM MST | Areal Flood Advisory | TWC | Pima, Pinal | 117 min |
| Aug 19, 12:09 PM MST | Flash Flood Warning | TWC | Pima | 81 min |
| Aug 19, 12:28 PM MST | Severe Thunderstorm Warning | TWC | Pima | 47 min |
| Aug 19, 12:32 PM MST | Flash Flood Warning | TWC | Pima, Pinal | 118 min |
| Aug 19, 12:46 PM MST | Areal Flood Advisory | TWC | Pinal | 119 min |
| Aug 19, 12:51 PM MST | Flash Flood Warning | TWC | Pima | 114 min |
| Aug 19, 1:30 PM MST | Areal Flood Advisory | TWC | Pima, Pinal | 2 hr |
| Aug 19, 1:51 PM MST | Flash Flood Warning | TWC | Pima | 3 hr |
| Aug 19, 1:57 PM MST | Areal Flood Advisory | TWC | Pima | 2 hr |
| Aug 19, 2:06 PM MST | Areal Flood Advisory | TWC | Cochise, Pima | 114 min |
| Aug 19, 2:27 PM MST | Areal Flood Advisory | TWC | Pima | 3 hr |
| Aug 19, 2:34 PM MST | Areal Flood Advisory | TWC | Pima, Pinal | 116 min |
| Aug 19, 2:51 PM MST | Areal Flood Advisory | TWC | Cochise, Pima, Santa Cruz | 114 min |
| Aug 19, 2:59 PM MST | Areal Flood Advisory | TWC | Pima | 3 hr |
| Aug 19, 3:24 PM MST | Flash Flood Warning | TWC | Pima | 111 min |
| Aug 19, 3:44 PM MST | Flash Flood Warning | TWC | Cochise, Pima, Santa Cruz | 3 hr |
| Aug 19, 4:20 PM MST | Areal Flood Advisory | TWC | Santa Cruz | 115 min |
| Aug 19, 4:29 PM MST | Flash Flood Warning | TWC | Pima | 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.