Lexington Weather

Lexington, Massachusetts, USA

47°F

4/30/2026 9:12am

Lexington Conditions: Mist, Overcast
Temperature: 47.1°F / 8.4°C
Dew Point: 45.7°F
Relative Humidity: 95%
Wind: Calm, 10-min avg: Calm, gust: None
Barometer: 29.73 in Steady
Visibility: 5 miles
Rain Today: 0.05 in

Watches, Warnings, and Advisories

Issued by the National Weather Service - Milwaukee/Sullivan, WI

FLOOD WARNING

Jefferson County, WI

Flood Warning issued April 30 at 5:10AM CDT until May 1 at 1:00AM CDT by NWS Milwaukee/Sullivan WI

FLOOD WARNING REMAINS IN EFFECT UNTIL JUST AFTER MIDNIGHT TONIGHT

Areas Affected: Jefferson, WI

Urgency: Immediate

Severity: Severe

Certainty: Observed

Alert Sent: Thursday 5:10am CDT

Alert Effective: Thursday 5:10am CDT

Alert Expires: Thursday 5:15pm CDT (expect updated alert by this time)

Event Onset: Thursday 5:10am CDT

Event Ends: Friday 1:00am CDT

Issued by: NWS Milwaukee/Sullivan WI

Details:

...FLOOD WARNING REMAINS IN EFFECT UNTIL JUST AFTER MIDNIGHT TONIGHT...

...The Flood Warning continues for the following rivers in
Wisconsin...Illinois...

Rock River At Newville affecting Rock County.

Rock River Near Lake Koshkonong affecting Jefferson and Rock
Counties.

Rock River At Fort Atkinson affecting Jefferson County.

Rock River At Afton affecting Winnebago and Rock Counties.

Rock River At Jefferson affecting Jefferson County.

ROCK RIVER near LEBANON-3 E-HWY MM BRIDGE affecting Dodge County.

Fox River Lower Near New Munster affecting Lake and Kenosha
Counties.

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

* WHERE...Rock River at Jefferson.

* WHEN...Until just after midnight tonight.

* IMPACTS...At 10.0 feet, Water affects low lying areas of
residential property in the City of Jefferson. Rock River Park and
boat launch is affected near Hwy B in Johnson Creek.

* ADDITIONAL DETAILS...
- At 4:00 AM CDT Thursday the stage was 10.3 feet.
- Bankfull stage is 8.0 feet.
- Recent Activity...The maximum river stage in the 24 hours
ending at 4:00 AM CDT Thursday was 10.4 feet.
- Forecast...The river is expected to fall below flood stage
this evening and continue falling to 7.6 feet Wednesday
evening.
- Flood stage is 10.0 feet.
- Flood History...This crest compares to a previous crest of
10.3 feet on 04/05/2007.
- http://www.weather.gov/safety/flood

Information:

Caution is urged when walking near riverbanks.

Motorists should not attempt to drive around barricades or drive
cars through flooded areas.

Additional information is available at www.weather.gov.

The next statement will be issued this afternoon at 515 PM CDT.

Meta data:

ID: urn:oid:2.49.0.1.840.0.a90a3b0738ba9377e1de63ae2cc952746d5789b3.005.1
Codes: WIC055
Link: https://api.weather.gov/alerts/urn:oid:2.49.0.1.840.0.a90a3b0738ba9377e1de63ae2cc952746d5789b3.005.1

FLOOD WARNING

Jefferson County, WI

Flood Warning issued April 30 at 5:10AM CDT until May 3 at 1:00AM CDT by NWS Milwaukee/Sullivan WI

FLOOD WARNING REMAINS IN EFFECT UNTIL EARLY SUNDAY MORNING

Areas Affected: Jefferson, WI

Urgency: Immediate

Severity: Severe

Certainty: Observed

Alert Sent: Thursday 5:10am CDT

Alert Effective: Thursday 5:10am CDT

Alert Expires: Thursday 5:15pm CDT (expect updated alert by this time)

Event Onset: Thursday 5:10am CDT

Event Ends: Sunday 1:00am CDT

Issued by: NWS Milwaukee/Sullivan WI

Details:

...FLOOD WARNING REMAINS IN EFFECT UNTIL EARLY SUNDAY MORNING...

...The Flood Warning continues for the following rivers in
Wisconsin...Illinois...

Rock River At Newville affecting Rock County.

Rock River Near Lake Koshkonong affecting Jefferson and Rock
Counties.

Rock River At Fort Atkinson affecting Jefferson County.

Rock River At Afton affecting Winnebago and Rock Counties.

Rock River At Jefferson affecting Jefferson County.

ROCK RIVER near LEBANON-3 E-HWY MM BRIDGE affecting Dodge County.

Fox River Lower Near New Munster affecting Lake and Kenosha
Counties.

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

* WHERE...Rock River at Fort Atkinson.

* WHEN...Until early Sunday morning.

* IMPACTS...At 16.5 feet, In the Fort Atkinson area, the following
roads are impacted: Sinnissippi Drive, Bark River Road from Kutz
Road to Rock River Road, and Rock River Road from Highway 106 to
the Fort Atkinson city limits. Water is in park land near the
river in Fort Atkinson.

* ADDITIONAL DETAILS...
- At 4:00 AM CDT Thursday the stage was 16.5 feet.
- Bankfull stage is 14.5 feet.
- Recent Activity...The maximum river stage in the 24 hours
ending at 4:00 AM CDT Thursday was 16.7 feet.
- Forecast...The river is expected to fall below flood stage
Saturday evening and continue falling to 14.8 feet Wednesday
evening.
- Flood stage is 16.0 feet.
- Flood History...This crest compares to a previous crest of
16.6 feet on 06/06/2000.
- http://www.weather.gov/safety/flood

Information:

Caution is urged when walking near riverbanks.

Motorists should not attempt to drive around barricades or drive
cars through flooded areas.

Additional information is available at www.weather.gov.

The next statement will be issued this afternoon at 515 PM CDT.

Meta data:

ID: urn:oid:2.49.0.1.840.0.a90a3b0738ba9377e1de63ae2cc952746d5789b3.003.1
Codes: WIC055
Link: https://api.weather.gov/alerts/urn:oid:2.49.0.1.840.0.a90a3b0738ba9377e1de63ae2cc952746d5789b3.003.1

FLOOD WARNING

Jefferson County, WI

Flood Warning issued April 30 at 5:10AM CDT until May 5 at 7:00AM CDT by NWS Milwaukee/Sullivan WI

FLOOD WARNING REMAINS IN EFFECT UNTIL TUESDAY MORNING

Areas Affected: Jefferson, WI; Rock, WI

Urgency: Immediate

Severity: Severe

Certainty: Observed

Alert Sent: Thursday 5:10am CDT

Alert Effective: Thursday 5:10am CDT

Alert Expires: Thursday 5:15pm CDT (expect updated alert by this time)

Event Onset: Thursday 5:10am CDT

Event Ends: Tuesday 7:00am CDT

Issued by: NWS Milwaukee/Sullivan WI

Details:

...FLOOD WARNING REMAINS IN EFFECT UNTIL TUESDAY MORNING...

...The Flood Warning continues for the following rivers in
Wisconsin...Illinois...

Rock River At Newville affecting Rock County.

Rock River Near Lake Koshkonong affecting Jefferson and Rock
Counties.

Rock River At Fort Atkinson affecting Jefferson County.

Rock River At Afton affecting Winnebago and Rock Counties.

Rock River At Jefferson affecting Jefferson County.

ROCK RIVER near LEBANON-3 E-HWY MM BRIDGE affecting Dodge County.

Fox River Lower Near New Munster affecting Lake and Kenosha
Counties.

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

* WHERE...Rock River near Lake Koshkonong.

* WHEN...Until Tuesday morning.

* IMPACTS...At 11.0 feet, In the Town of Lake Koshkonong,
floodwaters affect Vets Lane, Blackhawk Island Road, and Oxbow
Bend Road. There is widespread flooding of roads and docks in the
Town of Koshkonong and Town of Sumner including Vets Lane,
Blackhawk Island Road and Oxbow Bend Road.

* ADDITIONAL DETAILS...
- At 4:00 AM CDT Thursday the stage was 10.9 feet.
- Bankfull stage is 9.0 feet.
- Recent Activity...The maximum river stage in the 24 hours
ending at 4:00 AM CDT Thursday was 11.0 feet.
- Forecast...The river is expected to rise to a crest of 10.9
feet this morning. It will then fall below flood stage early
Tuesday morning.
- Flood stage is 10.0 feet.
- Flood History...This crest compares to a previous crest of
11.0 feet on 10/15/2019.
- http://www.weather.gov/safety/flood

Information:

Caution is urged when walking near riverbanks.

Motorists should not attempt to drive around barricades or drive
cars through flooded areas.

Additional information is available at www.weather.gov.

The next statement will be issued this afternoon at 515 PM CDT.

Meta data:

ID: urn:oid:2.49.0.1.840.0.a90a3b0738ba9377e1de63ae2cc952746d5789b3.002.1
Codes: WIC055, WIC105
Link: https://api.weather.gov/alerts/urn:oid:2.49.0.1.840.0.a90a3b0738ba9377e1de63ae2cc952746d5789b3.002.1