September 13, 2022: 48-Hour Weather Report and Intermediate-Term Outlooks; Tropical

Here is what we are paying attention to this evening and the next 48 hours from this afternoon’s NWS Forecast.

...There is a Slight Risk of excessive rainfall over Southwest and a
second area over the Northeast/northern Mid-Atlantic through Tuesday
morning...

...There is a Slight Risk of excessive rainfall from parts of the Great
Basin/Southwest from Tuesday into Wednesday morning...

Continuation of the NWS Short Range Forecast (It is updated twice a day and these updates can be found here.

Upper-level energy and ample moisture will aid in producing showers and
thunderstorms over the southwestern portion of the country through
Wednesday. The convection will create areas of heavy rain over parts of
the region. Therefore, the WPC has issued a Slight Risk of excessive
rainfall over parts of the Southwest through Tuesday morning. The
associated heavy rain will create mainly localized areas of flash
flooding, with urban areas, roads, and small streams the most vulnerable.

On Tuesday, the upper-level energy moves farther inland over the West, as
does the heavy rain. Therefore, the WPC has issued a Slight Risk of
excessive rainfall over parts of the Great Basin and a smaller second area
over the Southwest from Tuesday into Wednesday morning. The associated
heavy rain will create mainly localized areas of flash flooding, with
urban areas, roads, and small streams the most vulnerable.

Furthermore, as the energy continues to move inland on Wednesday, heavy
rain extends over parts of the Great Basin and Central Rockies. Therefore,
the WPC has issued a Slight Risk of excessive rainfall over parts of the
Great Basin into Central Rockies on Wednesday. The associated heavy rain
will create mainly localized areas of flash flooding, with urban areas,
roads, and small streams the most vulnerable.

Meanwhile, an upper-level low over the Great Lakes/Ohio Valley will move
slowly northeastward to Southeastern Canada by Wednesday. Moisture
streaming over parts of the eastern part of the country will produce rain
and showers/thunderstorms with heavy rain over the eastern third of the
country through Wednesday. Therefore, the WPC has issued a Slight Risk of
excessive rainfall over parts of the Northeast/northern Mid-Atlantic
through Tuesday morning. The associated heavy rain will create mainly
localized areas of flash flooding, with urban areas, roads, and small
streams the most vulnerable.

On Tuesday, the threat of excessive rainfall decreases over parts of the
Northeast. Therefore, the WPC has issued a Marginal Risk of excessive
rainfall over parts of the Northeast from Tuesday into Wednesday morning.
The associated heavy rain will create localized areas of flash flooding,
affecting areas that experience rapid runoff with heavy rain. On
Wednesday, the threat of excessive rainfall ends over the Northeast.

Moreover, tropical moisture and a lingering weak front over the Southeast
will aid in producing showers and thunderstorms over Florida through
Wednesday. As a result, the WPC has targeted parts of the Florida
Peninsula with a Marginal Risk of excessive rainfall from Monday into
Wednesday. In addition, the associated heavy rain will create localized
areas of flash flooding, affecting areas that experience rapid runoff with
heavy rain.

Maps that relate the forecast to geography can be found by clicking  Here for Day 1 and Here for Day 2.

Here is a 60-hour animated forecast map that shows how the short-term forecast is expected to play out.

If it needs to be updated click here.

HAZARDS OUTLOOKS

Click here for the latest complete Day 3 -7 Hazards forecast which updates only on weekdays.  Once a week probably Monday or Tuesday I will update the images. I provided the link for readers to get daily updates on weekdays. Use your own judgment to decide if you need to update these images.  

Worldwide Tropical Forecast

 

(This graphic updates on Tuesdays) If it has not been updated, you can get the update by clicking here

Detailed Maps and Reports for the Western Atlantic and the Pacific Oceans

Below are three maps that summarize the situation for the Atlantic, Eastern and Central Pacific. Additional information can be accessed by clicking HERE

First the Atlantic

Click to view the forecast map and have access to additional information https://www.nhc .noaa.gov/gtwo.php?basin=atlc&fdays=5

Then Eastern Pacific

Click to view the forecast map and have access to additional information https://www.nhc.noaa.gov/gtwo.php?basin=epac&fdays=5

Then Central Pacific

Click to view the forecast map and have access to additional information https://www.nhc.noaa.gov/gtwo.php?basin=cpac&fdays=5

And the Western Pacific

Click to view the forecast map and have access to additional information https://www.metoc.navy.mil/jtwc/jtwc.html

Some Intermediate-Term Outlooks

Links to “Outlook” maps and discussions for three time periods. Days 6 – 10, Days 8 – 14, and Weeks 3 and 4.  An outlook differs from a forecast based on how NOAA uses these terms in that an “outlook” presents information from deviation from normal and the likelihood of these deviations.

You have to click on the links because they do not update automatically and I do not want to have stale images in the article. But it is not difficult to click on a link and you get a large image plus a discussion. On Fridays in a separate article, we will show the images and provide a link in this article that article. But remember what you will see is the images as of Friday. But here you can get the current images simply by clicking on them. Then hit the return arrow at the upper left of your screen to return to the article. You will not find this information easily anywhere else.

The following is provided to help the reader relate the maps and the discussion that comes with the maps to how NWS will describe an area of the U.S.

https://i0.wp.com/www.wpc.ncep.noaa.gov/bndrys1.gif?w=1100&ssl=1

Days 6 – 10 Days 8 – 14 Weeks 3 and 4
https://www.cpc.ncep.noaa.gov/products/predictions/610day/ https://www.cpc.ncep.noaa.gov/products/predictions/814day/ https://www.cpc.ncep.noaa.gov/products/predictions/WK34/

Right now you can find these maps here (We show them every Friday there but you can click above and find them).

World Forecast for Day 6 (Currently Set for Day 6 but the reader can change that)

World Weather Forecast produced by the Australian Bureau of Meteorology. Unfortunately, I do not know how to extract the control panel and embed it into my report so that you could use the tool within my report. But if you visit it Click  Here and you will be able to use the tool to view temperature or many other things for THE WORLD. It can forecast out for a week. Pretty cool. Return to this report by using the “Back Arrow” usually found top left corner of your screen to the left of the URL Box. It may require hitting it a few times depending on how deep you are into the BOM tool. Below are the current worldwide precipitation and air pressure forecasts for six days out. They will not auto-update and right now are current for Day 6. If you want the forecast for a different day Click Here  I will try to update this map each day but you have the link so you can access the dashboard and get a wide variety of forecasts.I mostly rely on the reader to interpret world maps. For this map, areas of expected precipitation for the date and time shown are clearly shown. The number of High-Pressure systems shown is called the Wave Number. Maybe I will discuss WN someday. But it shows how many Rossby Waves there are around the World. Sometimes they are hard to count. Counting Low-Pressure systems should provide the same WN.  Rossby Waves are the way the temperature distribution of the Planet remains in balance. It is basically the science of fluid dynamics.  It can be very helpful in predicting the movement of weather patterns.  You can snip an area of interest and move it into MS Paint and enlarge it.

Month to Date Information

Month to date Temperature can be found at https://hprcc.unl.edu/products/maps/acis/MonthTDeptUS.png

Month to date Precipitation can be found at  https://hprcc.unl.edu/products/maps/acis/MonthPNormUS.png

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