Severe thunderstorm watch parts of northern and central MN until 11 p.m. Sunday; flooding possible too

A severe thunderstorm watch continues until 11 p.m. this Sunday evening for much of northern Minnesota and part of central Minnesota:

NWS Storm Prediction Center

Details of the severe thunderstorm watch, which does not include the Twin Cities metro area:

Severe Thunderstorm Watch Number 267
NWS Storm Prediction Center Norman OK
350 PM CDT Sun Jul 8 2018

The NWS Storm Prediction Center has issued a

* Severe Thunderstorm Watch for portions of
West central to northeastern Minnesota
Southeastern North Dakota
Northeastern South Dakota
Extreme northwestern Wisconsin
Lake Superior

* Effective this Sunday afternoon and evening from 350 PM until
1100 PM CDT.

* Primary threats include…
Scattered large hail and isolated very large hail events to 2
inches in diameter possible
Scattered damaging wind gusts to 70 mph possible
A tornado or two possible

SUMMARY…Thunderstorm development/intensification is expected the
next few hours from southeastern North Dakota eastward into
Minnesota. The storm environment will initially favor supercells
with large hail and the potential for a tornado or two. Storms
should grow upscale into clusters and line segments later this
evening, when the primary threat will become damaging winds and

The severe thunderstorm watch area is approximately along and 45
statute miles north and south of a line from 120 miles west
southwest of Detroit Lakes MN to 40 miles south southeast of Ely MN.
For a complete depiction of the watch see the associated watch
outline update (WOUS64 KWNS WOU7).


REMEMBER…A Severe Thunderstorm Watch means conditions are
favorable for severe thunderstorms in and close to the watch area.
Persons in these areas should be on the lookout for threatening
weather conditions and listen for later statements and possible
warnings. Severe thunderstorms can and occasionally do produce


AVIATION…A few severe thunderstorms with hail surface and aloft to
2 inches. Extreme turbulence and surface wind gusts to 60 knots. A
few cumulonimbi with maximum tops to 550. Mean storm motion vector

The Twin Cities metro area could see some scattered showers and thunderstorms overnight this Sunday night.

Updated watches and warnings

Updated weather information can be heard on the Minnesota Public Radio Network, and updates are also posted on the MPR News live weather blog.

You can also check with the Grand Forks, Duluth and Twin Cities offices of the NWS for watch and warning information.

Flooding possible too

Flash flood warnings continue until 11:15 p.m. this Sunday for portions of southern St. Louis county and southwest Lake county of northeastern Minnesota:

Here are additional flash flood warning details:

Flash Flood Warning
National Weather Service Duluth MN
712 PM CDT SUN JUL 8 2018

The National Weather Service in Duluth MN has issued a

* Flash Flood Warning for…
Southern St. Louis County in northeastern Minnesota…
Southwestern Lake County in northeastern Minnesota…

* Until 1115 PM CDT

* At 711 PM CDT, Doppler radar indicated thunderstorms producing
heavy rain across the warned area. Up to two inches of rain have
already fallen. Flash flooding is expected to begin shortly.

* Some locations that will experience flooding include…
Two Harbors, Cotton, Toivola, Meadowlands, Wolf Lake, Boulder
Lake, Larsmont, Brimson, Island Lake, Castle Danger, Knife River,
Thomas Lake Near Brimson, Whiteface Reservoir, Canyon, Highland
Lake, French River, City of Rice Lake, and Fredenberg.

Additional rainfall amounts of one to two inches are possible in the
warned area.


Turn around, don`t drown when encountering flooded roads. Most flood
deaths occur in vehicles.

Excessive runoff from heavy rainfall will cause flooding of small
creeks and streams, country roads, and other low lying spots.

A Flash Flood Warning means that flooding is imminent or occurring.
If you are in the warned area move to higher ground immediately.
Residents living along streams and creeks should take immediate
precautions to protect life and property.

There is also a flash flood watch for parts of central Minnesota into northeastern Minnesota that continues through Sunday night and expires at 7 a.m. Monday:

NWS Duluth  flash flood watch image

Details of the flash flood watch:

Flood Watch
National Weather Service Duluth MN
320 PM CDT Sun Jul 8 2018


.A slow-moving cold front and heavy rainfall rates will lead to
the possibility for flash flooding from storms Tonight into early
Monday morning. Rainfall rates over one inch per hour are
expected, with storm motions resulting in storms repeating over
the same area for numerous hours overnight.

Northern Cook/Northern Lake-Central St. Louis-
Southern Lake/North Shore-Southern Cook/North Shore-North Cass-
South Itasca-South Cass-Crow Wing-Northern Aitkin-South Aitkin-
Carlton/South St. Louis-
Including the cities of Isabella, Hibbing, Two Harbors,
Silver Bay, Grand Marais, Walker, Grand Rapids, Pine River,
Brainerd, Hill City, Aitkin, and Duluth
320 PM CDT Sun Jul 8 2018


The Flash Flood Watch continues for

* Portions of east central Minnesota, north central Minnesota, and
northeast Minnesota, including the following areas, Crow Wing,
Aitkin, Cass, South Itasca, Carlton/South St. Louis, Central St.
Louis, Cook and Lake.

* From 7 PM CDT this evening through Monday morning

* Strong thunderstorms will produce very heavy rainfall rates
tonight into early Monday morning, which may lead to flash
flooding along and south of the Iron Range across parts of
northeast Minnesota.


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.

Programming note

You can hear my live weather updates on Minnesota Public Radio at 7:49 a.m. Thursdays and Fridays, and at 7:35 a.m., 9:35 a.m. and 4:35 p.m. each Saturday and Sunday.