Lexington Weather

Lexington, Massachusetts, USA

58°F
4/17/2026 2:22pm 
  • Lexington Conditions: Mist, Overcast
  • Temperature: 58.3°F / 14.6°CColder 0.5°F than last hour.
  • Dew Point: 56.3°FDecreased 0.5°Fsince last hour.
  • Relative Humidity: 93% 
  • Wind: Calm, 10-min avg: Calm, gust: 2 mph
  • Barometer: 29.86 in Steady
  • Visibility: 6 miles
  • Rain Today: 0.10 in
  •   

Watches, Warnings, and Advisories

Issued by the National Weather Service - Chicago, IL

    FLOOD WATCH  

McHenry, IL

Flood Watch issued April 17 at 11:48AM CDT until April 18 at 5:00AM CDT by NWS Chicago IL

FLOOD WATCH IN EFFECT FROM 3 PM CDT /4 PM EDT/ THIS AFTERNOON THROUGH LATE TONIGHT

Areas Affected: Winnebago; Boone; McHenry; Lake; Ogle; Lee; De Kalb; Kane; DuPage; La Salle; Kendall; Grundy; Kankakee; Livingston; Iroquois; Ford; Northern Cook; Central Cook; Southern Cook; Northern Will; Southern Will; Eastern Will; Lake; Porter; Newton; Jasper; Benton

Urgency: Future

Severity: Severe

Certainty: Possible

Alert Sent: Friday 11:48am CDT

Alert Effective: Friday 11:48am CDT

Alert Expires: Friday 8:00pm CDT (expect updated alert by this time)

Event Onset: Friday 3:00pm CDT

Event Ends: Saturday 5:00am CDT

Issued by: NWS Chicago IL

Details: 
...FLOOD WATCH IN EFFECT FROM 3 PM CDT /4 PM EDT/ THIS AFTERNOON THROUGH LATE TONIGHT...

* WHAT...Flash flooding caused by excessive rainfall is possible.

* WHERE...Portions of Illinois, including the following areas,
Boone, Central Cook, De Kalb, DuPage, Eastern Will, Ford, Grundy,
Iroquois, Kane, Kankakee, Kendall, La Salle, Lake IL, Lee,
Livingston, McHenry, Northern Cook, Northern Will, Ogle, Southern
Cook, Southern Will and Winnebago and northwest Indiana, including
the following areas, Benton, Jasper, Lake IN, Newton and Porter.

* WHEN...From 3 PM CDT  /4 PM EDT/ this afternoon through late
tonight.

* IMPACTS...Creeks and streams may rise out of their banks. Ongoing
river flooding may worsen. Flooding may occur in poor drainage and
urban areas. Roads and streets may be flooded. Area creeks and
streams are already elevated, increasing the risk of flooding due
to additional rainfall.

* ADDITIONAL DETAILS...
- Locally heavy showers and thunderstorms with rainfall rates
up to 1 to 2 inches per hour may occur across the area later
today through the overnight hours. Despite the expected
relatively fast storm movement, anomalously high atmospheric
moisture content will support high rainfall rates. In many
areas, soil moisture remains very high, including areas near
the Illinois-Wisconsin border where nearly saturated soils
exist due to recent rainfall. While many areas may see
lighter accumulations less than 0.5 inches, soils will be
sensitive to rainfall. Areas near and downstream of heavy
rainfall, particularly urban areas and locations in far
northern Illinois, may see flash flooding and river flooding
impacts, some locally significant.
- http://www.weather.gov/safety/flood

Information: 
A Flood Watch for flash flooding means rapid-onset flooding is
possible, but not yet certain, based upon the latest forecasts.
Flash flooding is a dangerous situation. Persons with interests
along area rivers, creeks, and other waterways should monitor the
latest forecasts and be prepared to take action should flooding
develop.

Meta data: 
ID: urn:oid:2.49.0.1.840.0.f184e63f031327a92b761ff32540f6b7b5392c66.001.1
Codes: ILZ003, ILZ004, ILZ005, ILZ006, ILZ008, ILZ010, ILZ011, ILZ012, ILZ013, ILZ019, ILZ020, ILZ021, ILZ023, ILZ032, ILZ033, ILZ039, ILZ103, ILZ104, ILZ105, ILZ106, ILZ107, ILZ108, INZ001, INZ002, INZ010, INZ011, INZ019
Link: https://api.weather.gov/alerts/urn:oid:2.49.0.1.840.0.f184e63f031327a92b761ff32540f6b7b5392c66.001.1