The August 9th-11th Rain Event


A slow moving upper level low pressure system rotated across Southeast Michigan, bringing a prolonged period

of steady rainfall to much of the area, beginning Thursday the 9th and lasting through early Saturday morning the

11th. For much of the area, this rain provided relief from the moderate to severe drought which had gripped Southern

Michigan since June. However, some locations received too much rain and experienced flooding. Over these two days

most of southeast Michigan received between one and three inches of rain. However, the Saginaw Valley  received

between 3 and 8 inches and a few local spots along the M 59 corridor received 3 to 6 inches. Tri Cities airport (MBS)

had a two day rainfall total of just over 8 inches! Of this, 6.93 inches fell during Friday the 10th. This shattered the

previous 1 day record of 5.51 inches which occurred on September 10th, 1986 during one of the most extreme rain

events in recent history. Prior to this rainfall, Saginaw was on target to have one of its driest summers on record.

After this rainfall event, the rainfall total for the summer of 2012 (Jun-Aug) stands at 14.81 inches which now ranks

as the 4th wettest summer on record. Below is a list of storm total rainfall reports along with an image of the total

rainfall from August 9th through the morning of August 11th based off radar estimates.


 Storm Total Rainfall Reports from August 9th through 11th

308 NOUS43 KDTX 211439 PNSDTX MIZ047>049-053>055-060>063-068>070-075-076-082-083-21HM- Public Information Statement National Weather Service Detroit/Pontiac MI 1037 AM EDT Thu Jul 21 2016 A Severe Thunderstorm Watch has been issued by the National Weather Service in Michigan. In the interest of public safety, the following safety rules are provided. Public and commercial broadcast stations serving the affected area are asked to frequently broadcast these messages while the watch is in effect. As a quick reminder, the term watch means conditions are favorable for the development of severe weather in the designated area. During a watch, there is no cause for immediate concern. You should go about your normal business, but keep abreast of weather developments. Public safety officials should, however, activate prearranged plans. A warning, on the other hand, means a severe thunderstorm or tornado has been observed or indicated by radar. People in the path of the storm should take immediate precautions as outlined here. Severe thunderstorms produce strong damaging winds of 58 MPH or greater, large hail of one inch in diameter or greater, heavy rain and deadly lightning. Winds in excess of 58 MPH can push over shallow rooted trees, break off tree limbs about the size of your wrist and damage chimneys and TV antennas. In rare occasions, severe thunderstorms can produce winds in excess of 80 MPH which could break windows, peel surfaces off of roofs, snap large trees and move trailer homes and automobiles. Hail one inch in diameter or larger can damage windows, vehicles and exterior finishes of buildings, especially if accompanied by severe winds. Persons should stay indoors and away from areas with loose items that could become flying debris. Severe thunderstorms can and occasionally do produce tornadoes so be prepared to move to an appropriate shelter should it become necessary. Lightning is one of the worst killers, so stay indoors and avoid using electrical appliances. You should get out of open fields and off of farm or other types of heavy equipment. Avoid towers or tall trees. If on a boat or swimming, get out of the water and to shore as quickly as possible. Also avoid areas subject to flash flooding. If you lose power, and plan to use a portable power generator in your home be careful. Observe all safety precautions to avoid carbon monoxide poisoning, electrocution or a fire. Portable generators should only be operated outdoors in a dry and well ventilated area.




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