McHenry Severe Watches & Warnings NOAA Weather Radio

Watches & Warnings

Flood Warning
Issued: 8:32 AM CDT Jul. 21, 2017 – National Weather Service

The Flood Warning continues for
the Fox River at Algonquin tailwater.
* Until further notice.
* At 730 am Friday the stage was 12.6 feet.
* Flood stage is 9.5 feet.
* Recent activity... flood forecasts for Algonquin were moved to this
location on July 5 2011. Gage zero datum is different from the old
gage location. Flood and action stages have changed.
* Major flooding is occurring and major flooding is forecast.
* Forecast... the river will continue rising to near 12.8 feet by
Saturday afternoon. Additional rises may be possible thereafter.



Lat... Lon 4238 8830 4237 8817 4221 8814 4194 8827
      4195 8838 4224 8828




Flash Flood Watch
Issued: 11:29 AM CDT Jul. 21, 2017 – National Weather Service

... Flash Flood Watch remains in effect from 4 PM CDT this
afternoon through Saturday morning...

The Flash Flood Watch continues for

* portions of north central Illinois and northeast Illinois,
including the following areas, in north central Illinois,
Boone, De Kalb, La Salle, Lee, Ogle, and Winnebago. In
northeast Illinois, Cook, dupage, Grundy, Kane, Kendall, Lake
IL, McHenry, and will.

* From 4 PM CDT this afternoon through Saturday morning.

* Multiple rounds of thunderstorms producing heavy rainfall with
rates well over one inch per hour are likely to move across
portions of north central and northeast Illinois late this
afternoon through early Saturday morning.

* Additional heavy rainfall could exacerbate flooding already
occurring across portions of northern Illinois... producing new
rises on area rivers and creeks. With the ground already
saturated in many areas... heavy rainfall will likely quickly
produce runoff and produce flash flooding.

Precautionary/preparedness actions...

A Flash Flood Watch means that conditions may develop that lead
to flash flooding. Flash flooding is a very dangerous situation.

You should monitor later forecasts and be prepared to take action
should flash flood warnings be issued.



Rodriguez


Flash Flood Watch
Issued: 11:29 AM CDT Jul. 21, 2017 – National Weather Service

... Flash Flood Watch remains in effect from 4 PM CDT this
afternoon through Saturday morning...

The Flash Flood Watch continues for

* portions of north central Illinois and northeast Illinois,
including the following areas, in north central Illinois,
Boone, De Kalb, La Salle, Lee, Ogle, and Winnebago. In
northeast Illinois, Cook, dupage, Grundy, Kane, Kendall, Lake
IL, McHenry, and will.

* From 4 PM CDT this afternoon through Saturday morning.

* Multiple rounds of thunderstorms producing heavy rainfall with
rates well over one inch per hour are likely to move across
portions of north central and northeast Illinois late this
afternoon through early Saturday morning.

* Additional heavy rainfall could exacerbate flooding already
occurring across portions of northern Illinois... producing new
rises on area rivers and creeks. With the ground already
saturated in many areas... heavy rainfall will likely quickly
produce runoff and produce flash flooding.

Precautionary/preparedness actions...

A Flash Flood Watch means that conditions may develop that lead
to flash flooding. Flash flooding is a very dangerous situation.

You should monitor later forecasts and be prepared to take action
should flash flood warnings be issued.



Rodriguez