High 80, Severe Storms Possible After 4PM for Arlington Heights, Chicago Weather Forecast Northwest

FLASH FLOOD WATCH in effect from June 26, 01:00 PM CDT until June 27, 01:00 AM CDT

Convection is the keyword for this afternoon’s forecast that could bring numerous severe thunderstorms, the development of super cells, heavy rain, hail, wind, and a brief tornado. Lightning is probably the greatest threat this afternoon and evening. According to The Storm Prediction Center, Arlington Heights and the northwest suburbs are on the border of a 2% or 5% chance of a tornado within 25 miles of a point designated on a map in our area. The most severe weather today is forecast for western Missouri and eastern Kansas.

We are in very humid air with Relative Humidity as high as 84%, forecast to reach 93% after midnight. Rainfall in central Arlington Heights about 7:00 a.m. to 9:00 a.m. was about 0.2″.

Weather Radar (also nexrad.chgowx.com) at 12:55 p.m. shows a fast-moving north-south line of thunderstorms, just west of Rockford, moving north-northeast.








 O’HARE FORECAST … 

This Afternoon: Showers and thunderstorms, mainly after 5pm. Some of the storms could produce heavy rain. High near 80. South wind around 10 mph, with gusts as high as 20 mph. Chance of precipitation is 80%. New rainfall amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.

Tonight: Showers and possibly a thunderstorm before 7pm, then showers and thunderstorms likely, mainly between 7pm and 1am. Some of the storms could produce heavy rain. Low around 68. South wind 10 to 15 mph. Chance of precipitation is 80%. New rainfall amounts between a half and three quarters of an inch possible.

Wednesday: A 20 percent chance of showers and thunderstorms before 1pm. Mostly cloudy, with a high near 79. Northwest wind around 10 mph, with gusts as high as 15 mph.

Wednesday Night: Partly cloudy, with a low around 66. West wind 5 to 10 mph.

Thursday: Sunny, with a high near 88. West wind around 5 mph becoming south in the afternoon.

Thursday Night: A 20 percent chance of showers and thunderstorms after 1am. Partly cloudy, with a low around 72.

Friday: Mostly sunny and hot, with a high near 95.

Friday Night: Mostly clear, with a low around 76.

Saturday: Sunny and hot, with a high near 95.

Saturday Night: A slight chance of showers and thunderstorms after 1am. Partly cloudy, with a low around 76.

Sunday: A chance of showers and thunderstorms. Mostly sunny, with a high near 89.

Sunday Night: A slight chance of showers and thunderstorms. Mostly cloudy, with a low around 71.

Monday: Partly sunny, with a high near 85.

 LAKE TEMPS … 

SOUTHERN LAKE MICHIGAN WATER TEMPERATURES
NATIONAL WEATHER SERVICE CHICAGO/ROMEOVILLE IL
910 AM CDT Tue Jun 26 2018

LAKE MICHIGAN WATER TEMPERATURES…

CHICAGO SHORE……….69.

CHICAGO CRIB……….63.

WILMETTE BUOY……….61.

MICHIGAN CITY……….54.

MICHIGAN CITY BUOY……….66.

SOUTH MID LAKE BUOY……….65.

NORTH MID LAKE BUOY……….57.

june.chicagoweatherstation.com

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Flash Flood Watch
Flood Watch
National Weather Service Chicago IL
1104 AM CDT Tue Jun 26 2018

…Heavy Rain Potential This Afternoon and Tonight…

ILZ003>006-008-010>014-019-020-270015-
/O.CON.KLOT.FF.A.0005.180626T1800Z-180627T0600Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Winnebago-Boone-McHenry-Lake IL-Ogle-Lee-DeKalb-Kane-DuPage-Cook-
La Salle-Kendall-
Including the cities of Rockford, Belvidere, Woodstock, Waukegan,
Oregon, Dixon, DeKalb, Aurora, Elgin, Wheaton, Chicago, Ottawa,
and Oswego
1104 AM CDT Tue Jun 26 2018

…FLASH FLOOD WATCH REMAINS IN EFFECT THROUGH LATE TONIGHT…

The Flash Flood Watch continues for

* Portions of north central Illinois and northeast Illinois,
including the following areas, in north central Illinois,
Boone, DeKalb, La Salle, Lee, Ogle, and Winnebago. In
northeast Illinois, Cook, DuPage, Kane, Kendall, Lake IL, and
McHenry.

* Through late tonight

* A couple periods of thunderstorms with heavy rain are expected
this afternoon through the evening. Given recent heavy rainfall,
any additional heavy rain may produce localized flash flooding.

* Area rivers and streams are running high and the ground
remains moist, which will cause rainfall to more quickly go
into runoff.

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.