Lexington Weather

Lexington, Massachusetts, USA

59°F
4/17/2026 2:10pm 
  • Lexington Conditions: Mist, Overcast
  • Temperature: 58.5°F / 14.7°CColder 0.1°F than last hour.
  • Dew Point: 56.5°FIncreased 0.6°Fsince last hour.
  • Relative Humidity: 93%Increased 2.0% since last hour.
  • 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 WARNING  

Boone County, IL

Flood Warning issued April 17 at 10:38AM CDT until April 18 at 7:00PM CDT by NWS Chicago IL

FLOOD WARNING NOW IN EFFECT UNTIL TOMORROW EVENING

Areas Affected: Boone, IL; Winnebago, IL

Urgency: Immediate

Severity: Severe

Certainty: Observed

Alert Sent: Friday 10:38am CDT

Alert Effective: Friday 10:38am CDT

Alert Expires: Saturday 4:45am CDT (expect updated alert by this time)

Event Onset: Friday 10:38am CDT

Event Ends: Saturday 7:00pm CDT

Issued by: NWS Chicago IL

Details: 
...FLOOD WARNING NOW IN EFFECT UNTIL TOMORROW EVENING...

...The Flood Warning is extended for the following rivers in
Illinois...

Kishwaukee River near Perryville affecting Winnebago County.

Kishwaukee River at Belvidere affecting Winnebago and Boone
Counties.

Pecatonica River near Shirland affecting Winnebago County.

For the Kishwaukee River...including Belvidere, Perryville...Minor
flooding is forecast.

* WHAT...Minor flooding is occurring and minor flooding is forecast.

* WHERE...Kishwaukee River from County Line Road downstream to
confluence with South Branch Kishwaukee River, including the
Belvidere gauge.

* WHEN...Until tomorrow evening.

* IMPACTS...At 9.0 feet, Boone-McHenry County Line Road threatened.
Low-lying areas are threatened in Belvidere Park.

* ADDITIONAL DETAILS...
- At 9:30 AM CDT Friday the stage was 9.3 feet.
- Recent Activity...The maximum river stage in the 24 hours
ending at 9:30 AM CDT Friday was 9.4 feet. The river is
currently cresting.
- Forecast...The river is currently cresting. The river is
expected to begin a slow fall by tomorrow.
- Flood stage is 9.0 feet.
- http://www.weather.gov/safety/flood

Information: 
A Flood Warning means water levels above flood stage are imminent or
may already be occurring. Persons along rivers and streams in the
warned area should take immediate precautions to protect life and
property.

These forecasts are based on observed precipitation as well as
forecast precipitation 24 hours into the future. Changes to the
rainfall forecast, or any additional rainfall after 24 hours, may
cause changes to these river forecasts.

Additional information is available at www.weather.gov.

The next statement will be issued by late tonight.

Meta data: 
ID: urn:oid:2.49.0.1.840.0.7c65dfbdc28a7a48e50636d7fe03d7eea908c384.002.1
Codes: ILC007, ILC201
Link: https://api.weather.gov/alerts/urn:oid:2.49.0.1.840.0.7c65dfbdc28a7a48e50636d7fe03d7eea908c384.002.1

 

    TORNADO WATCH  

Boone County, IL

Tornado Watch issued April 17 at 12:45PM CDT until April 17 at 8:00PM CDT by NWS Chicago IL

Areas Affected: Boone, IL; De Kalb, IL; La Salle, IL; Lee, IL; McHenry, IL; Ogle, IL; Winnebago, IL

Urgency: Future

Severity: Extreme

Certainty: Possible

Alert Sent: Friday 12:45pm CDT

Alert Effective: Friday 12:45pm CDT

Alert Expires: Friday 8:00pm CDT

Event Onset: Friday 12:45pm CDT

Event Ends: Friday 8:00pm CDT

Issued by: NWS Chicago IL

Details: 
THE NATIONAL WEATHER SERVICE HAS ISSUED TORNADO WATCH 129 IN
EFFECT UNTIL 8 PM CDT THIS EVENING FOR THE FOLLOWING AREAS

IN ILLINOIS THIS WATCH INCLUDES 7 COUNTIES

IN NORTH CENTRAL ILLINOIS

BOONE                 DE KALB               LA SALLE
LEE                   OGLE                  WINNEBAGO

IN NORTHEAST ILLINOIS

MCHENRY

THIS INCLUDES THE CITIES OF ALGONQUIN, BELVIDERE, BYRON,
CRYSTAL LAKE, DEKALB, DIXON, LA SALLE, MARSEILLES, MCHENRY,
MENDOTA, OREGON, OTTAWA, ROCHELLE, ROCKFORD, STREATOR, SYCAMORE,
AND WOODSTOCK.

Meta data: 
ID: urn:oid:2.49.0.1.840.0.2d418dcdd3f2bd5688275cc34cb7a67d51e8eb98.001.1
Codes: ILC007, ILC037, ILC099, ILC103, ILC111, ILC141, ILC201
Link: https://api.weather.gov/alerts/urn:oid:2.49.0.1.840.0.2d418dcdd3f2bd5688275cc34cb7a67d51e8eb98.001.1

 

    HYDROLOGIC OUTLOOK  

Boone County, IL

Hydrologic Outlook issued April 17 at 3:57AM CDT by NWS Chicago IL

Another round of thunderstorms expected Friday afternoon and Friday night

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

Urgency: Future

Severity: Unknown

Certainty: Possible

Alert Sent: Friday 3:57am CDT

Alert Effective: Friday 3:57am CDT

Alert Expires: Friday 4:00pm CDT

Event Onset: Friday 3:57am CDT

Issued by: NWS Chicago IL

Details: 
...Another round of thunderstorms expected Friday afternoon and Friday night...

ESFLOT

Additional thunderstorms are expected Friday afternoon and Friday
night across northern Illinois and northwest Indiana. Atmospheric
conditions are favorable for some of these storms to produce
locally heavy rainfall.

Many rivers across northern Illinois and northwest Indiana remain
elevated. Soil moisture also remains elevated in many areas,
especially in northern Illinois along the Wisconsin border. Thus,
any heavy rainfall that occurs could lead to flooding of rivers,
creeks, urban and low-lying areas. Rivers such as the Rock, Fox
and Des Plaines which are already in flood in some locations, may
be especially prone to rainfall which could exacerbate ongoing
flooding.

This outlook means that elevated water levels and potential
impacts are possible, but not yet certain. Persons should closely
monitor forecasts including the possibility of flood watches,
warnings, and advisories.

This outlook will be updated by Friday afternoon.

Meta data: 
ID: urn:oid:2.49.0.1.840.0.59cdd4ca930e5a06aa530151495f0a0b82a3f62a.001.1
Codes: ILC007, ILC031, ILC037, ILC043, ILC053, ILC063, ILC075, ILC089, ILC091, ILC093, ILC097, ILC099, ILC103, ILC105, ILC111, ILC141, ILC197, ILC201, INC007, INC073, INC089, INC111, INC127
Link: https://api.weather.gov/alerts/urn:oid:2.49.0.1.840.0.59cdd4ca930e5a06aa530151495f0a0b82a3f62a.001.1