FLASH FLOOD WATCH for Northern Illinois Counties 1 AM Monday to 1 AM Tuesday

TODAY SUNRISE: 5:27 AM SUNSET: 8:27 PM

Chicagoland weather radar shows no precipitation in the area. Quad Cities radar also shows no precipitation in the area.

Satellite images show the nearest clouds in west central Wisconsin.

Flash Flood Watch

FLOOD WATCH
NATIONAL WEATHER SERVICE CHICAGO/ROMEOVILLE IL
941 PM CDT SUN JUL 12 2015


ILZ003>006-008-010>014-019>023-032-033-039-INZ001-002-010-011-019-
131045-
/O.CON.KLOT.FF.A.0005.150713T0600Z-150714T0600Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
WINNEBAGO-BOONE-MCHENRY-LAKE IL-OGLE-LEE-DE KALB-KANE-DUPAGE-COOK-
LA SALLE-KENDALL-GRUNDY-WILL-KANKAKEE-LIVINGSTON-IROQUOIS-FORD-
LAKE IN-PORTER-NEWTON-JASPER-BENTON-
INCLUDING THE CITIES OF...ROCKFORD...BELVIDERE...WOODSTOCK...
WAUKEGAN...OREGON...DIXON...DEKALB...AURORA...WHEATON...CHICAGO...
OTTAWA...OSWEGO...MORRIS...JOLIET...KANKAKEE...PONTIAC...
WATSEKA...PAXTON...GARY...VALPARAISO...MOROCCO...RENSSELAER...
FOWLER
941 PM CDT SUN JUL 12 2015

...FLASH FLOOD WATCH REMAINS IN EFFECT FROM 1 AM CDT /2 AM EDT/
MONDAY THROUGH LATE MONDAY NIGHT...

THE FLASH FLOOD WATCH CONTINUES FOR

* PORTIONS OF ILLINOIS AND INDIANA...INCLUDING THE FOLLOWING
  AREAS...IN ILLINOIS...BOONE...COOK...DE KALB...DUPAGE...FORD...
  GRUNDY...IROQUOIS...KANE...KANKAKEE...KENDALL...LA SALLE...
  LAKE IL...LEE...LIVINGSTON...MCHENRY...OGLE...WILL AND
  WINNEBAGO. IN INDIANA...BENTON...JASPER...LAKE IN...NEWTON AND
  PORTER.

* FROM 1 AM CDT /2 AM EDT/ MONDAY THROUGH LATE MONDAY NIGHT.

* TWO ROUNDS OF THUNDERSTORMS ARE EXPECTED...THE FIRST AFTER
  MIDNIGHT TONIGHT THROUGH MONDAY MORNING AND THEN THE SECOND
  MONDAY AFTERNOON INTO MONDAY EVENING. A VERY MOIST AIRMASS
  WILL BE IN PLACE THROUGH MONDAY NIGHT WITH DEWPOINTS IN THE
  MIDDLE TO UPPER 70S. THIS WILL ALLOW ANY THUNDERSTORMS THAT
  DEVELOP TO PRODUCE TORRENTIAL RAINFALL IN A VERY SHORT AMOUNT
  OF TIME.

* RAINFALL AMOUNTS OF 1 TO 3 INCHES ARE LIKELY WITH LOCALLY
  HIGHER AMOUNTS POSSIBLE. THIS AMOUNT OF RAINFALL...FALLING
  OVER SATURATED GROUND AS WELL AS URBAN AREAS...COULD QUICKLY
  LEAD TO 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.

 NWS POINT FORECAST … 

Detailed Forecast


Tonight
Showers and thunderstorms likely, mainly after 4am. Patchy fog after midnight. Otherwise, mostly cloudy, with a low around 68. South southeast wind around 5 mph. Chance of precipitation is 60%. New rainfall amounts between a quarter and half of an inch possible.


Monday
Showers and thunderstorms, mainly before 1pm. Some of the storms could be severe and produce heavy rainfall. High near 87. Southwest wind 5 to 15 mph, with gusts as high as 20 mph. Chance of precipitation is 80%. New rainfall amounts between a half and three quarters of an inch possible.


Monday Night
A 40 percent chance of showers and thunderstorms, mainly before 1am. Some of the storms could be severe and produce heavy rainfall. Mostly cloudy, with a low around 69. Southwest wind 5 to 10 mph becoming west northwest after midnight.


Tuesday
A 30 percent chance of showers and thunderstorms. Partly sunny, with a high near 83. West northwest wind 5 to 10 mph becoming north northeast in the afternoon.


Tuesday Night
Mostly cloudy, with a low around 63. North wind 5 to 10 mph.


Wednesday
Mostly sunny, with a high near 80.

 AIRPORT WEATHER OBSERVATIONS … 

Location Time
(cdt)
Sky/Weather Temp.
(ºF)
Dewpt.
(ºF)
Humidity
(%)
Wind
(mph)
Pressure
(in)
Chicago/O’Hare 21:51 Partly Cloudy 74 66 76 SE 9 29.92
Chicago Midway Airport 21:53 A Few Clouds 76 66 72 SE 7 29.92
Chicago Executive Airport 21:52 A Few Clouds 72 65 79 SE 3 29.94
Chicago / West Chicago, Dupage Airport 21:52 A Few Clouds 74 68 82 SE 5 29.92
Aurora Municipal Airport 21:52 Mostly Cloudy 76 69 79 SE 7 29.92
Gary Chicago International 21:45 Clear NA NA NA SE 7 29.94
Kenosha Regional Airport 21:53 Fair 71 64 79 S 7 29.93
Chicago / Waukegan, Waukegan Regional Airport 21:55 Mostly Cloudy 69 65 87 SE 7 29.92
Lansing Municipal Airport 22:15 Fair 73 66 79 SE 8 29.94
Click on location name for the weather during the past two days at that site.

 CHICAGO EXECUTIVE AIRPORT … 

D
a
t
e
Time
(cdt)
Wind
(mph)
Vis.
(mi.)
Weather Sky Cond. Temperature (ºF) Relative
Humidity
Wind
Chill
(°F)
Heat
Index
(°F)
Pressure Precipitation (in.)
Air Dwpt 6 hour altimeter
(in)
sea level
(mb)
1 hr 3 hr 6 hr
Max. Min.
12 20:52 E 5 10.00 Fair CLR 74 65 74% NA NA 29.93 1013.1
12 19:52 E 6 10.00 Fair CLR 76 66 72% NA 78 29.93 1013.0
12 18:52 E 7 10.00 Fair CLR 78 65 81 78 64% NA 80 29.93 1013.0
12 17:52 E 10 10.00 Fair CLR 80 66 62% NA 82 29.93 1013.2
12 16:52 E 7 10.00 Fair CLR 80 66 62% NA 82 29.95 1013.7
12 15:52 E 8 10.00 A Few Clouds FEW034 81 66 61% NA 83 29.96 1014.0
12 14:52 E 8 10.00 A Few Clouds FEW033 80 66 62% NA 82 29.97 1014.6
12 13:52 E 6 10.00 Mostly Cloudy SCT028 BKN034 79 66 65% NA 81 29.99 1014.9
12 12:52 Vrbl 3 10.00 Partly Cloudy SCT022 79 67 79 66 67% NA 81 30.00 1015.6
12 11:52 NE 7 10.00 Mostly Cloudy BKN017 76 67 74% NA 77 30.01 1015.9
12 10:52 E 5 10.00 Overcast OVC016 74 66 76% NA NA 30.01 1015.9
12 09:52 Calm 10.00 Overcast FEW013 BKN018 OVC036 73 66 79% NA NA 30.02 1016.1
12 08:52 Calm 6.00 Fog/Mist BKN005 OVC022 69 65 87% NA NA 30.03 1016.5
12 07:52 Calm 3.00 Fog/Mist OVC022 67 64 91% NA NA 30.03 1016.7
12 06:52 NE 6 2.00 Fog/Mist SCT005 SCT014 OVC023 66 64 68 66 93% NA NA 30.04 1016.8 0.01
12 05:52 NE 5 5.00 Fog/Mist OVC023 68 65 90% NA NA 30.02 1016.3
12 04:52 Calm 5.00 Fog/Mist BKN019 OVC024 68 65 90% NA NA 30.02 1016.2
12 03:52 N 5 4.00 Fog/Mist BKN011 OVC024 68 65 90% NA NA 30.01 1016.0 0.01
12 02:52 Calm 4.00 Fog/Mist BKN012 OVC018 68 65 90% NA NA 30.01 1015.7
12 01:52 Calm 5.00 Fog/Mist BKN015 OVC036 68 65 90% NA NA 30.02 1016.1 0.01
12 00:52 NE 3 4.00 Light Rain Fog/Mist FEW017 SCT031 OVC042 68 64 71 68 87% NA NA 30.04 1016.6 0.01

 MORE HELPFUL LINKS …  

LIVE RADAR | STORM TRACKS | UNISYS US IR SAT | UNISYS Midwest IR SAT | UNISYS More IR SAT

WunderMap® with Temperature/Wind Data || Google: Arlington Heights Temps | NE Illinois Temps

Full Screen Motion Weather Radar (Wunderground.com)

Midwest Cloud Cover with Arlington Heights Weather Forecast | SWPC Aurora Forecast

ChicagoWeatherStation.com I O’Hare Normal Temps/Precip I O’Hare Record Temps, Precip, Snow

SUNLIGHT DATA FOR SECURITY, TRAFFIC SAFETY, AND SPORTS
SunCalc.net data with solar azimuth and trajectory, times for dawn, sunrise, solar noon, sunset, dusk …


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