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Severe Thunderstorm Warning For Far Northwestern Suburbs

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(Credit: CBS)

(Credit: CBS)

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A severe thunderstorm warning has been issued this morning for Boone, McHenry and Winnebago counties in the far northwestern suburbs. A flood warning is also in effect in parts of Lake County.

Severe Thunderstorm Warning

Statement as of 9:26 AM CDT on April 09, 2013

Expires 10:00 AM CDT on April 09, 2013

The National Weather Service in Chicago has issued a

* Severe Thunderstorm Warning for…
northern Boone County in north central Illinois…
northwestern McHenry County in northeast Illinois…
northeastern Winnebago County in north central Illinois…

* until 1000 am CDT

* at 922 am CDT… a severe thunderstorm was located near Machesney
Park… and moving northeast at 45 mph.

Hazard… quarter size hail.

Source… radar indicated. Nickel size hail was reported earlier in
this area associated with weaker storms.

Impact… damage to vehicles is expected.

* Locations impacted include…
Poplar Grove and Capron.
I-90 between mile markers 1 and 76.

Precautionary/preparedness actions…

For your protection move to an interior room on the lowest floor of a
building.

Flood Warning

Statement as of 4:42 AM CDT on April 09, 2013

Expires 1:00 AM CDT on April 15, 2013

The Flood Warning continues for
the Fox River near New Munster.
* At 4:00 am Tuesday the stage was 9.2 feet.
* Flood stage is 10.0 feet.
* Minor flooding is forecast.
* Impact… at 11.4 feet… there are 2 inches of water over 77th
street in the Wheatland area.

River forecasts are available for some but not all river gaging
locations. The 7 day river forecast takes into account past
precipitation… soil moisture conditions etc..and predicted
future 24 hour basin-average precipitation.

(Stages in ft.) Bank- latest forecast stages
– flood full observed … for 7 PM…
location stage stage stage/time Wed Thu Fri Sat
New Munster 10.0 9.0 9.18 04 am 04/09 9.6 10.7 11.0 10.7
Afton 9.0 8.0 9.09 12 am 04/09 9.4 9.7 9.8 9.9
Newville 5.5 4.5 5.91 04 am 04/09

- highest 24 hour change
– observed in river stage
– stage in (ft.) Up to highest stage
– the last latest observed forecast in
– 7 days stage next 7 days
Afton 9.19 12 PM 04/08 0.16 10.00 01 am 04/13
New Munster 9.88 05 am 04/02 0.34 11.00 07 am 04/11
Newville 5.99 03 PM 04/08 0.05 ..not available..

… Below is predicted 24 hour precipitation information for
the listed sites…

(aftw3) 6-hour precipitation amounts (in.)
Afton: 7 PM-1 am 0.00
afton: 1 am-7 am 0.08
afton: 7 am-1 PM 0.40
afton: 1 PM-7 PM 0.27

(nmsw3) 6-hour precipitation amounts (in.)
New munster: 7 PM-1 am 0.00
new munster: 1 am-7 am 0.05
new munster: 7 am-1 PM 0.36
new munster: 1 PM-7 PM 0.26

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