Hurricane Rosa to hit Southwest

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VagabondWahine

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https://www.nbcnews.com/news/us-news/hurricane-rosa-could-bring-flooding-southwest-desert-n914981


Heads-Up, desert dwellers! NBC website story about Hurricane Rosa coming north from Baja California. Flash flooding & many inches of predicted for SoCal, Las Vegas, Phoenix, & environs. "Areas that could be in for heavy conditions include the Arizona cities of Flagstaff, Payson and Prescott and the Grand Canyon’s South Rim, weather officials said. Up to six inches was possible at the canyon’s North Rim."
 
yes, stay out of washes. this is going to dump a lot of rain in AZ and So Cal. projected to go right up the Colorado River Valley and then towards the 4 corners area. most of the So Cal desert, southern NV, and the western half of AZ is under a flash flood watch. camp only on high ground. heed the warnings. watch the weather, listen to weather radio. highdesertranger
 
Flash Flood Watch
AZZ001>003-036-CAZ522-524>527-NVZ015>022-292300-
/O.CON.KVEF.FF.A.0006.181001T2200Z-181003T1200Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Northwest Plateau-Lake Havasu and Fort Mohave-Northwest Deserts-
Lake Mead National Recreation Area-Death Valley National Park-
Eastern Mojave Desert-Morongo Basin-Cadiz Basin-
San Bernardino County-Upper Colorado River Valley-Lincoln County-
Northeast Clark County-Western Clark and Southern Nye County-
Sheep Range-Spring Mountains-Red Rock Canyon-Las Vegas Valley-
Southern Clark County-
205 AM PDT Sat Sep 29 2018 /205 AM MST Sat Sep 29 2018/

...FLASH FLOOD WATCH REMAINS IN EFFECT FROM MONDAY AFTERNOON
THROUGH LATE TUESDAY NIGHT...
 
Everyone in the path of this storm needs to become familiar with the satellite topography feature of Google Maps. It's right on your screen. Find your location by using the location button, zoom in, and inspect your surroundings. If there is a wash or a creek bed that could fill up nearby, identify the highest ground and move to it. Even better is a topographical (topo) map that has elevation lines. Please be aware that water seeks the lowest level and that water gathering on high ground will find a way down. This is not always clear on the Coconino Plateau (Flagstaff, Mogollon Rim) because of the forest. It's more obvious in the lower country because of the desert waterways. Also rather than hardpan like you have in the desert, the Ponderosa pine forest sits on feet of pine duff. When that stuff gets saturated you can't go anywhere. The roads are clay and turn to slick mud-covered concrete. Find high ground now, supply for two weeks and sit tight. The volcanic soil turns to quicksand. I drove my Chevy van straight into it once, managed to get out but did $2000 worth of damage. Be safe y'all.

I have circled the satellite button on Google Maps here. I have it in Satellite mode, so you can see the drainages just south of the South Rim. Using a topo map along with this will give you all the info you need. You can download topo maps at Avenza Maps, a great app that lets you download for offline navigation. Works even when you have zero signal. Use your MVUM (Motor Vehicle Use Map) to find a campsite in the area you've identified. If you don't have a paper one (get one at the ranger station or the visitor center at the train station in Flagstaff) you can download one from Avenza Maps, but the digital version is very hard to read IMO.
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The Dire Wolfess
 
Dang. It worked when I posted it. Wonder what went wrong...

The Dire Wolfess
 
Be aware that Google sat images are not up to date.
For a desert they are 2D pictures taken at a specific point in time, and weather can change the desert dramatically.
I know that the sat image and the street view for my Eureka county property are over three years old. They should datetime stamp the sat images.
Non-Maintained roads through the desert, that appear on maps and have names, change after every weather event and over time.
Washes can be deeper by flooding, or shallower filled with dust blown in on high winds.

Then there are the small boulders that appear in tracks that were within a year used for an off road desert race that would have wrecked the race vehicles. Weird place.
 
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