Did you get a glimpse of the full moon Friday morning? It was tough to see. Not only did the altocumulus clouds shield the view but the official time of the full moon occurred at 6:58 in the morning. I admit, I missed it. The last time we had two full moons within a calendar month was New Year’s Eve 2009. The next blue moon won’t happen again until July 2015.
Extreme southern Minnesota actually saw high level cirrus clouds Friday afternoon from the remains of Isaac. The leftover moisture from this once hurricane will completely miss Minnesota. Our weather will behave for much of the holiday weekend. The only hiccup will be Sunday night as a weak front slides through producing an isolated clap of thunder. A rain cover might be a good thing to pack for those camping.
Moisture remains of Isaac could dump 7"+ in MO & IL.
Saturday: Southeast breeze, warmer. Good day for the lake. H: mid 80s
Labor Day: Perfect for the BBQ. Mostly sunny. H: mid 80s
Tuesday: Sunny. Showers and storms Tuesday night. H: mid 80s
Wednesday: Thunderstorms likely. Mostly cloudy and cooler. H: upper 70s
Climate Change Revisited
The American Meteorological Society just released a revised statement on climate change that replaces the last revision in 2007. “The informational statement is intended to provide a trustworthy, objective, and scientifically up-to-date explanation of scientific issues of concern to the public. The statement provides a brief overview of how and why global climate has changed in recent decades and will continue to change in the future. It is based on the peer-reviewed scientific literature and is consistent with the majority of current scientific understanding as expressed in assessments and reports from the Intergovernmental Panel on Climate Change, the U.S. National Academy of Sciences, and the U.S. Global Change Research Program.” according to the AMS. If interested, you can read the entire statement here.
Nighttime view of Isaac. NASA Earth Observatory image by Jesse Allen and Robert Simmon
What would you rather have? A heat wave or a hurricane? I would gladly take the heat over a hurricane any day. That’s the great thing about Minnesota…you don’t have to worry about landfalling hurricanes. While we’re sweating it out up here, those along the northern Gulf Coast have been dealing with over 20″ of rain and winds up to 113 mph from Hurricane Isaac.
5 Day Rainfall
Isaac has been (slowly) weakening ever since it made landfall Tuesday night along the southeast coast of Louisiana. The moisture remains of Isaac will start to trek north and could dump significant rain over parts of the Midwest. Illinois and Indiana may see as much as 7 inches of rain this holiday weekend from the the leftovers of Isaac. Our next chance of rain will be Sunday night, not from a tropical cyclone, but from a good ol’ fashion cold front.
The high temperatures Wednesday in the Twin Cities was 93 degrees. Not quite to the record of 96 but it was our 27th day at or above 90 degrees this year.
Tuesday: Sunny with a few showers and thunderstorms Tuesday night. H: low 80s
Even though Minnesota will miss out on the rain from Isaac, it’s not too uncommon to see moisture leftovers of tropical cyclones creep into the Upper Midwest. Between 1950-2011, the highest rainfall Minnesota has received from a tropical cyclone is 3.83″ from Lester in 1992.
Be on the look out for the blue moon Friday the 31st. There was one full moon already on August 1st and, thanks to modern folklore, a second full moon within one month is referred to as the blue moon. But does the moon actually turn blue? Turns out, on rare occasions, it can happen.
We have some serious heat on the way starting Wednesday…the type of heat where you’ll want to ride either early in the morning or late in the afternoon. Record-breaking temperatures are expected Thursday as the mercury tops 100 degrees. The air should stay pretty dry (which means humidity levels will stay in check) but dry air does warm up faster. An excessive heat watch is in effect for the metro on Thursday. Temperatures will stay above normal through the upcoming holiday weekend. The next chance of rain will be Sunday night and on Labor Day Monday.
Wednesday: The heat wave begins. Sunny. H: low 90s
Thursday: Hottest day of the week. H: at or slightly above 100° Record: 96°
Friday: Not crazy hot but temps remain above average. Mostly sunny. H: upper 80s
Saturday: Mostly sunny. H: upper 80s
Sunday: Nice day for the BBQ. Campers heads up: thunderstorms Sunday night H: near 90
Labor Day: A few showers and thunderstorms. Cooler. H: lower 80s
While we sweat it out in the Midwest, those along the northern Gulf Coast are preparing for a landfalling hurricane. Hurricane Isaac will make landfall early Wednesday morning in southeastern Louisiana with sustained winds of up to 80 mph.
Isaac has a large diameter with strong winds, storm surge and heavy rain extending a good distance out from the center. In other words, this storm cloud be more damaging than a smaller storm with similar winds. Isaac is not another Katrina but it just goes to show how vulnerable locations along the Gulf Coast are to tropical cyclones. Of the 11 most dangerous hurricanes in North America, 5 have occurred within the last 8 years. Katrina was the most costliest U.S. weather-related disaster at $100 billion.
Isaac will be slow to make landfall, therefore, heavy rain and flooding will be a threat in southern Louisiana and Mississippi. Once on land, all the long range models are depicting Isaac moving north and then to the right into the Ohio Valley where beneficial rain could put a serious dent in the drought across Missouri, Illinois and Indiana. At this point, I’m not expecting MN to see any rain from Isaac. Our rain Sunday through Labor Day will come from a good ol’ fashion cold front.
Rainfall Forecast of Isaac Leftovers by the Weekend