Mon. Mar 25th, 2019

Fascinating, Unprecedented, Frightening flooding in North America

  • Vancouver Island Inland Sections Forecast - No watches or warnings in effect.

    Forecast Issued 11:00 AM PDT Monday 25 March 2019 - Monday: Increasing cloudiness. 40 percent chance of showers late this afternoon. High 13. UV index 3 or moderate. Monday night: Rain. Amount 10 to 15 mm. Low plus 5. Tuesday: Showers ending in the afternoon then cloudy. Risk of thunderstorms in the morning and early in the afternoon. Amount 5 to 10 mm. High 9. UV index 1 or low. Tuesday night: Cloudy periods. Low plus 2. Wednesday: Sunny. High 17. Wednesday night: Clear. Low plus 2. Thursday: Sunny. High 16. Thursday night: Clear. Low plus 3. Friday: Sunny. High 15. Friday night: Clear. Low plus 4. Saturday: Sunny. High 14. Saturday night: Clear. Low plus 4. Sunday: A mix of sun and cloud. High 13.

  • Current Conditions
    Temperature
    11.2° C
    0.9 ° C/hr
    Barometer
    101.32 kPa
    0.0
    Wind
    SSW 3.2 km/h
    gusting 9.7 km/h
    Humidity
    77 %
    Rain Rate
    0.0 mm/hr
    Wind Chill
    11.2° C
    Heat Index
    11.2° C
    Dewpoint
    7.3° C
    UV
    2.0
    Solar
    423 W/m2
    Last Updated: 12:45:00 PST
    Click to Refresh or See All Conditions
  • Day Almanac
    Day's Rain
    0.0 mm
    Day ET
    0.0 mm mm
    Rain Storm
    NotAvailable mm
    Civil Rise
    06:38
    Moon Phase
    Waning gibbous (73% full)
    Civil Set
    20:12
    Day Length
    13:25:10
    Day High
    11.2° C @ 12:44 Tdy.
    Day Low
    2.3° C @ 05:26 Tdy.
    Day High Rain Rate
    0.0mm/hr00:00
    Day High Barometer
    102.08 kPa @ 00:00 Tdy.
    Day Low Barometer
    101.27 kPa @ 11:28 Tdy.
    Day Low Windchill
    0.5° C @ 08:58 Tdy.
    Day High Heat Index
    11.2° C @ 12:44 Tdy.
    Day High Wind Gust
    S 9.7km/h @ 11:50 Tdy.
    Day High Solar Radiation
    439W/m2 @ 12:41 Tdy.
    Day High UV Index
    2.1 @ 12:42 Tdy.

The great plains of North America are currently experiencing the greatest flooding in 150 to 300 years.

CBC and CNN are both carrying footage live.

Today the Province of Manitoba intentionally breached a dyke on the Assiniboine River, flooding hundreds of houses and thousands of square km of land to protect against an uncontrolled breach that would threaten whole towns.

Assiniboine Breach
Picture from CBC News website of breach as it started flowing this morning.

The flow of the Assiniboine is currently 1/2 the rate of Niagara Falls.

Incredibly, at opposite ends of the central North America flood plain, the situation is even worse.
North America water basins

At 1PM today, the US Army Corps of Engineers will take the unprecedented step of having all 3 Mississippi flood diversion structures active at once when they open the Morganza Spillway. It will flood 2500 homes and threaten thousands more.

This is being done to protect the “Old River Control Structure” which keeps the Mississippi flowing through New Orleans and keep it from threatening millions in New Orleans and Baton Rouge and keeps that key economic centre of the US economy afloat, literally.

Old River Control Structure
The Old River Control Structure a couple days ago.

Why is all this happening? Major and persistent snowfall over the winter thanks to La Nina and big rains this spring. Global Warming could play a role as well as a warmer atmosphere will harbour more moisture and that moisture, whether snow or rain, ends up somewhere.

Morganza Spill Structure in 1973
Morganza Spill Structure the last time in 1973

Today, it is ending up, in incredibly dramatic ways, in Lake Manitoba and the Gulf of Mexico.

___________

Back home here, we can expect more rain over the weekend. Get out and about while you can. Late next week we should warm up a little.

1 thought on “Fascinating, Unprecedented, Frightening flooding in North America

  1. Wow, while it seems Manitoba has escaped the worst-case scenario, the fires in Alberta are wreaking havoc.  We sometimes need to just consider how fortunate we are.
    In fact, the EC forecast is now full of shiny yellow balls for the upcoming long weekend!  Could we hit 20C by Thursday? 

Comments are closed.