Flash Flooding

A series of thunderstorms dumped heavy rainfall over the southern sections of our viewing area overnight.   From around midnight through 5 a.m., heavy rain fell over much of Putnam, Allen & Hardin counties. 

Our StormTrack 11 doppler estimates that a few spots received between 3 and 6 inches of rain.  You can see in the snapshot below, a bulls-eye of orange stretches across eastern Allen and western Hardin county, where isolated 6"+ amounts occurred.

This heavy rainfall was the result of something called "training".  It is when waves of thunderstorms move over the same area repeatedly -- like train cars on a track passing the same area over and over.  Many flash flood events occur from this phenomenon.

Flooding causes the most severe weather deaths, and many of those deaths result in people staying in their cars.  The National Weather Service has a flood safety slogan called "Turn Around, Don't Drown".  Flood water can sometimes wash away a road, so the water may be a lot deeper than you think.  About one foot of water can make about 1,500 pounds buoyant, so a couple feet of water will float most cars.

Flood deaths also are a result from people in a low-lying area, like a bridge underpass, that gets inundated with water in a short period of time.  The bottom line is, when very heavy rain occurs, being in a car is not a very safe place to be.

Major Warm-Up This Week

Easterly winds will keep temps in check  into Monday, but a warm front will pass through the area on Tuesday, allowing the return to 80° temperatures by mid-week.

We could see some 80s far away from lake Tuesday, and areawide Wednesday and Thursday if we get enough sun.  Some scattered storms will be around during this period.

The warmest day of the year thus far has been April 10th when we hit 84°, and has been the only day when we have hit or exceeded 80°.  If we go above 84° this week, it will be the warmest temp since October 10th, when it hit 87°.

Record Flooding

All time record flooding is ongoing on the Ohio and Mississippi Rivers after a deluge of heavy and repeated rains the past 30 days. Several states have seen 15 to 20 inches or more of heavy rain in less than a month! Check out this picture of precipitation estimates over the past 30 days:



This has pushed many rivers to major flood stage, and in some cases shattering the all time record flood stages in well over 100 years of records. Cities and town have been completely inundated. Levees have been breached and hundreds upon hundreds of square miles have flooded. For additional details and specific river levels CLICK HERE.

A Touch Of Frost

Lows in some areas dropped into the mid 30s this morning, allowing for some patchy frost.  Frost occurs even when thermometers read 33-36°.  The reason is that thermometers that take air temperature are placed a few feet above the ground.  On a clear & calm night, cooler air sinks and falls to the ground.  This allows the temperature at grass/plant level to be around 32°, even though your thermometer might read a little higher.

One good thing about very dry air this time of year is that it warms quickly.  Highs will reach the mid 60s today.  A bigger warm-up is slated for next week.





For other information about "A Touch Of Frost", click here.

Historic April Tornado Outbreak

April of 2011 has all but ensured itself that it will go down in history as the worst month for tornadoes that devastated, ravaged and destroyed many communites across the United States. Here are some of the preliminary statistics coming from the National Oceanic and Atmospheric Administration (NOAA):

312 Tornadoes reported from April 27-28. This far surpasses one of the worst tornado outbreaks historically, the super tornado outbreak of 1974 on April 3-4 where 148 tornadoes were reported across 13 states.



April 27th was the deadliest single day for tornadoes since March 18, 1925 when 747 people were killed during a tornado outbreak. (Tri-State tornado)

The monthly record for April tornadoes was 267 in 1974. This past April recorded over 600 tornadoes! The previous record for any month was 542 tornadoes in May of 2003.

Click Here For the Full NOAA Report

May Almanac

Normal High/Low:

May 1      66° / 43°

May 31   76° / 54°

Records:  95° / 25°

Normal Rainfall:  3.14"

Sunrise & Sunset:

May 1      6:32 am / 8:33 pm

May 31   6:04 am / 9:02 pm

April 2011 in Review

Toledo Express Airport recorded 6.33" of rainfall, making it the second rainiest April on record.  This amount was 3.09" above normal.  The period of April 16-28 produced 4.53" of rain.  It rained on 22 days of the month, representing 73% of the month.

Temps worked out to near normal (the cool spells and warm days balanced out), ranging from 25° on the 3rd to 84° on the 10th.