Scattered t-storms northern MN overnight, steamy Monday

Scattered thunderstorms are expected over much of northern Minnesota overnight, and some storms could also spread into central Minnesota.  Even the northern portion of the Twin Cities metro area could see an isolated thunderstorm toward Monday morning.

The Storm Prediction Center of the National Weather Service shows a slight risk of severe weather over parts of northern and central Minnesota overnight. The outlook also indicates a marginal risk of severe weather over the remainder of northern and central Minnesota and part of southern Minnesota. The marginal risk outline includes the Twin Cities metro area:

A slight risk of severe weather means that scattered severe thunderstorms are possible.

Here are the risk categories that are used by the Storm Prediction Center:

You can follow severe weather developments on the MPR News live blog.

More thunderstorms Monday afternoon and evening

A cold front is expected to ignite another batch of thunderstorms over central Minnesota Monday afternoon, with the thunderstorms expanding into southern Minnesota during the evening hours:

Steamy Monday

Highs in the mid to upper 80s are expected over central and southern Minnesota on Monday:

Dew points will be in the tropical lower 70s in many locations:

Drier and cooler air will spread over Minnesota on Tuesday.

Tropical update

The National Hurricane Center is watching a tropical depression in the Florida Straits. It is expected to move into the southeastern Gulf of Mexico by Monday morning.

Here is the latest advisory from the National Hurricane Center:

TROPICAL DEPRESSION NINE ADVISORY NUMBER   2

NWS NATIONAL HURRICANE CENTER MIAMI FL       AL092016

1100 PM EDT SUN AUG 28 2016

...DEPRESSION MOVING WESTWARD THROUGH THE FLORIDA STRAITS...

SUMMARY OF 1100 PM EDT...0300 UTC...INFORMATION

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LOCATION...23.4N 82.7W

ABOUT 100 MI...160 KM SW OF KEY WEST FLORIDA

ABOUT 25 MI...40 KM NW OF HAVANA CUBA

MAXIMUM SUSTAINED WINDS...35 MPH...55 KM/H

PRESENT MOVEMENT...W OR 270 DEGREES AT 9 MPH...15 KM/H

MINIMUM CENTRAL PRESSURE...1007 MB...29.74 INCHES

WATCHES AND WARNINGS

--------------------

There are no coastal watches or warnings in effect.

DISCUSSION AND 48-HOUR OUTLOOK

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At 1100 PM EDT (0300 UTC), the center of Tropical Depression Nine

was located near latitude 23.4 North, longitude 82.7 West. The

depression is moving toward the west near 9 mph (15 km/h) and this

motion is expected to continue through tonight.  On the forecast

track, the depression will be moving away from the Florida Keys and

Cuba and into the southeastern Gulf of Mexico tonight and Monday

morning. A turn toward the west-northwest and a decrease in

forward speed are expected by Monday afternoon, followed by a turn

toward the northwest on Tuesday.

Maximum sustained winds are near 35 mph (55 km/h) with higher gusts.

Some strengthening is forecast during the next 48 hours.  Wind gusts

to 45 mph were reported in the lower Florida Keys this afternoon and

evening.

The estimated minimum central pressure is 1007 mb (29.74 inches).

HAZARDS AFFECTING LAND

----------------------

RAINFALL:  The depression is expected to produce total rain

accumulations of 1 to 4 inches over the southern half of the Florida

peninsula and the Florida Keys through Wednesday.  Isolated maximum

amounts of 6 inches are possible over coastal areas of southern

Florida and the Keys.  This rainfall may cause flooding and flash

flooding.

WIND:  Gusts to tropical storm force are possible in a few squalls

in the lower Florida Keys through tonight.

The National Hurricane Center forecast graphic shows that the tropical depression is expected to become a tropical storm by Monday evening:

The National Hurricane Center posts frequent tropical weather updates.