Timing for weekend rain; how weather forecasting helped D-Day invasion

This is an archived article and the information in the article may be outdated. Please look at the time stamp on the story to see when it was last updated.


Weather wise just spectacular across central Indiana Friday.  The humidity remains low, temperatures are warming and skies were nearly flawless.  Early morning low temperatures reached 49° in New Castle but warmed nicely – some 25 to 30 degrees under the June sun.  The lack of humidity – a dry air mass – allows for wide daily temperature spreads.  5 Pm temperatures reached the lower 80s in many locations.

4 PM Friday temperatures


The humidity remains in check tonight – so very mild once again.  For the second morning in a row many outlying areas dipped to the 40s – New Castle 49°. Not quite as cold Saturday morning but still comfortable.

Forecast temperatures Saturday morning


Rain still in the weekend forecast dry time will be ending but we will have many dry hours this weekend. Current thinking is that most of the rain falls while we sleep Saturday overnight then ends early Sunday.

NAM Model Fcst 8 PM Sat
US model NAM forecast radar 8 PM Saturday

Showers to diminish Sunday AM from west to east.

Rainfall numbers still look healthy but again will be selective.  Off 5 computer forecast rainfall for the city consistent at .87″  but spread still high among the machines as t-storms to play a role in the rain disbursement. The spread runs from .30″ to 1.57″. Amounts vary in and around t-storms.

Rainfall amounts to vary widely this weekend. Locally higher amounts in and around storms



Real heat in the extended forecast: late next week hottest of the year possible with upper 80s expected late next week or next weekend.

EURO Model 240 Hours Monday 6-16

Jet Stream
Jet Stream forecast Monday June 16th


We commemorate the 70th anniversary of the D-Day invasion along the shores of France during  World War II Friday.  Weather played an incredible role in the launch and success of the liberation of Europe on that day.

The armada of ships, troops and the enormous undertaking was weather dependent that day.  The success of air support and calmer waters were needed to accomplish the landing along the beaches.  Weather up until the 6th of June had been rough but a window opened June 6th 1944.  Forecasters told the top brass that this is their best chance to launch the invasion because bad weather was forecast to return.  Meteorology was a very young science in 1944, plenty of room for failure but this forecast was a success.

Retrieved off Twitter from Presidential historian Micheal Beschloss, here is the secret message sent well after the invasion started to Washington DC.  Note the 3rd paragraph.

War Department D-DAY Message
D Day to Washington DC via twitter message from Presidential Historian Michael Beschloss

Modern day meteorology was jumped started by World War II.  Then a young science accurate weather measuring and forecasting was a must.  Correct barometer reading were required for bombing missions – (bombs explode above the ground not on contact for maximum impact) radar technology was new and radar operators discovered that weather was causing echoes on their screen, masking potential enemy targets.  In time the NWS WSR 57 radar emerged then the WSR 74C.  The numbers identify the years they were commissioned.  These radars were on the forefront of severe weather forecasting.  Now the modern Doppler Radar WSR 88D is the primary weather radar used nationwide.

Aircraft flying on their missions encountered head winds that caused higher fuel usage but then used tail winds to sail quickly back to base.  They discovered the Jet Stream in World War II and it was kept top-secret for years.

Most Popular

Latest News

More News