Alert archive / Minnesota / Flash Flood Warnings in 2016

Flash Flood Warning 12, NWS Duluth, MN

August 10, 2016Lake County, Minnesota

NWS Duluth, MN issued this flash flood warning at Aug 10, 2016, 7:33 PM CDT for Lake County, Minnesota. It was in force for 3 hr. 6 reports came from inside the area while it was in force.

The area

The outline as issued, with what was reported inside it.

The facts

Issued: Aug 10, 2016, 7:33 PM CDT (00:33 UTC)
Expired: Aug 10, 2016, 10:30 PM CDT
In force: 3 hr
Issued by: NWS Duluth, MN
Area: Storm-based polygon
Flood severity: None

County Lake County, MN

The radar

The Duluth radar (KDLH), 84 km from the middle of the area, began a volume at 00:35 UTC, the scan nearest the moment this went out.

Open the radar archive at this moment

The archived warnings, watches and discussions in force at that minute are drawn over the scan, this one among them.

What was reported inside it

Time	Report	Where	Remark
Aug 10, 7:35 PM CDT	HEAVY RAIN 3	1 W Silver Bay, MN	.
Aug 10, 8:15 PM CDT	HEAVY RAIN 4	1 W Silver Bay, MN	1 INCH OVER PAST 40 MINUTES.
Aug 10, 8:15 PM CDT	HEAVY RAIN 4	1 W Silver Bay, MN	1 INCH OVER PAST 40 MINUTES. CORRECTED OB TO MEASURED.
Aug 10, 9:11 PM CDT	HEAVY RAIN 6.58	1 S Silver Bay, MN	RAINFALL SINCE 530 PM/3.75 HRS. MESONET STATION AT SILVER BAY SAFE HARBOR.
Aug 10, 9:20 PM CDT	HEAVY RAIN 4.16	1 W Silver Bay, MN	.
Aug 10, 9:25 PM CDT	FLASH FLOOD	5 Ssw Tettegouche State, MN	WATER OVER HIGHWAY 61 BETWEEN MM 53 AND 54.

Local storm reports filed while the alert was in force, from inside its polygon or its counties.

Did it verify

Verified. The Iowa Environmental Mesonet's Cow matched one storm report to this flash flood warning; the first came 112 minutes after it went out.

Cow counts a report within 15 km of the polygon while the warning was in force: a tornado for a tornado warning; hail of 1 inch or more, a gust of 58 mph or more or wind damage for a severe thunderstorm warning; a flash flood report for a flash flood warning.

The nearest sounding before it

International Fa, MN (KINL), launched 00:00Z, 0.6 hours before the alert went out and 201 km from the middle of its area. This is the routine balloon launch nearest before it, the air the forecaster had in hand, not a measurement taken for the alert.

Skew-T log-p

Temperature in red, dew point in green, the mixed-layer parcel dashed.

Hodograph

The wind turning with height, colored by layer: ground to 1 km, 1 to 3 km, 3 to 6 km, 6 to 10 km.

Mixed-layer CAPE: 0 J/kg
Mixed-layer CIN: No buoyant parcel
Mixed-layer LCL: 855 m above ground
0-6 km bulk shear: 29 kt
0-1 km storm-relative helicity: 3 m²/s²
0-3 km storm-relative helicity: 157 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

Open this sounding in Storm Lab

The text

As transmitted.

351 
WGUS53 KDLH 110033
FFWDLH
MNC075-110330-
/O.NEW.KDLH.FF.W.0012.160811T0033Z-160811T0330Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/

BULLETIN - EAS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE DULUTH MN
733 PM CDT WED AUG 10 2016

THE NATIONAL WEATHER SERVICE IN DULUTH MN HAS ISSUED A

* FLASH FLOOD WARNING FOR...
  SOUTH CENTRAL LAKE COUNTY IN NORTHEASTERN MINNESOTA...

* UNTIL 1030 PM CDT

* AT 729 PM CDT...DOPPLER RADAR AND TRAINED WEATHER SPOTTERS
  REPORTED HEAVY RAIN ACROSS THE WARNED AREA. UP TO THREE INCHES OF
  RAIN HAVE ALREADY FALLEN. FLASH FLOODING IS EXPECTED TO BEGIN
  SHORTLY.

ADDITIONAL RAINFALL AMOUNTS OF TWO INCHES ARE POSSIBLE IN THE WARNED
AREA.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

BE ESPECIALLY CAUTIOUS AT NIGHT WHEN IT IS HARDER TO RECOGNIZE THE
DANGERS OF FLOODING.

STAY AWAY OR BE SWEPT AWAY. RIVER BANKS AND CULVERTS CAN BECOME
UNSTABLE AND UNSAFE.

FLOODING IS OCCURRING OR IS IMMINENT. IT IS IMPORTANT TO KNOW WHERE
YOU ARE RELATIVE TO STREAMS...RIVERS...OR CREEKS WHICH CAN BECOME
KILLERS IN HEAVY RAINS. CAMPERS AND HIKERS SHOULD AVOID STREAMS OR
CREEKS.

PLEASE REPORT FLOODING TO YOUR LOCAL LAW ENFORCEMENT AGENCY WHEN YOU
CAN DO SO SAFELY.

&&

LAT...LON 4732 9122 4721 9134 4729 9156 4744 9141

$$

GOHDE

1 follow-up statement

815 
WGUS73 KDLH 110111
FFSDLH

FLASH FLOOD STATEMENT
NATIONAL WEATHER SERVICE DULUTH MN
811 PM CDT WED AUG 10 2016

MNC075-110330-
/O.CON.KDLH.FF.W.0012.000000T0000Z-160811T0330Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
LAKE MN-
811 PM CDT WED AUG 10 2016

...THE FLASH FLOOD WARNING REMAINS IN EFFECT UNTIL 1030 PM CDT FOR
SOUTH CENTRAL LAKE COUNTY...

AT 806 PM CDT...DOPPLER RADAR AND TRAINED WEATHER SPOTTERS REPORTED
HEAVY RAIN IN SILVER BAY AND SURROUNDING AREAS WITHIN THE BAPTISM RIVER BASIN.  
THREE TO FIVE INCHES OF RAIN HAVE FALLEN. FLASH FLOODING IS EXPECTED TO 
BEGIN SHORTLY.

SOME LOCATIONS THAT WILL EXPERIENCE FLOODING INCLUDE...
SILVER BAY...BEAVER BAY AND TETTGOUCHE STATE PARK. 

ADDITIONAL RAINFALL AMOUNTS OF ONE INCH OR MORE IS POSSIBLE IN
THE WARNED AREA.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

BE ESPECIALLY CAUTIOUS AT NIGHT WHEN IT IS HARDER TO RECOGNIZE THE
DANGERS OF FLOODING.

STAY AWAY OR BE SWEPT AWAY. RIVER BANKS AND CULVERTS CAN BECOME
UNSTABLE AND UNSAFE.

FLOODING IS OCCURRING OR IS IMMINENT. IT IS IMPORTANT TO KNOW WHERE
YOU ARE RELATIVE TO STREAMS...RIVERS...OR CREEKS WHICH CAN BECOME
KILLERS IN HEAVY RAINS. CAMPERS AND HIKERS SHOULD AVOID STREAMS OR
CREEKS.

PLEASE REPORT FLOODING TO YOUR LOCAL LAW ENFORCEMENT AGENCY WHEN YOU
CAN DO SO SAFELY.

&&

LAT...LON 4732 9122 4721 9134 4729 9156 4744 9141

$$

GOHDE

What forecasters said that day

The local office's own words before this flash flood warning went out, as it sent them, from the Iowa Environmental Mesonet's archive of National Weather Service text.

NWS Duluth, MN wrote its last area forecast discussion before this flash flood warning went out at Aug 10, 6:46 PM CDT, 47 minutes earlier.

Area forecast discussion, Aug 10, 6:46 PM CDT, 47 minutes before

Area Forecast Discussion
National Weather Service Duluth MN
646 PM CDT WED AUG 10 2016

.SHORT TERM...(This evening through Thursday)
Issued at 330 PM CDT Wed Aug 10 2016

At 330 PM, it was relatively dry across the Northland. The
exception was in the Brainerd Lakes area, where a cluster of
thunderstorms was located over southeastern Crow Wing County.
Another large cluster of thunderstorms was poised to move into the
southwest CWA from the west this afternoon. Temperatures were held
to the 60s across portions of northeastern Minnesota, with temps
in northwest Wisconsin in the mid 80s in spots. Dewpoints were in
the lower 70s south of the developing warm front.

The warm front as of mid afternoon was located across central
Minnesota, and into far northern Wisconsin. Surface analysis
indicates high surface based CAPE south of the warm front, with
relatively stable air across northeastern MN due to easterly winds
and earlier convection. The area we will continue to monitor is
the area along and north of the strongest west to east instability
gradient, essentially our southern CWA. Showers and thunderstorms
will continue to grow upscale during the late afternoon and
evening, and then evolve into a potential flash flood scenario as
the night wears on. Issued a flash flood watch earlier for
portions of NE MN and far NW WI. Still think this area is most
likely to see the flooding, but will need to watch for other
possible flooding and adapt as needed. The other area of concern
would be the rest of our northern Wisconsin area. Much of the
Brainerd Lakes region saw 1 to 2 inches of rain overnight, with a
few locations indicating more than 2 inches.

The showers and storms will continue into Thursday as well,
especially over the south and east. Will continue to watch for the
possibility of flooding on Thursday and Thursday night as well.

.LONG TERM...(Thursday night through Wednesday)
Issued at 330 PM CDT Wed Aug 10 2016

The heavy rain will finally end west to east Thursday evening across
NE MN and will exit NW WI by sunrise Friday morning. The storm
system that has brought the heavy rain moves to the east as a ridge
builds into the region. There will still be a chance for a
thunderstorm Friday as some instability remains over the area.
Cooler air will push into the region for the weekend with
scattered showers possible through the weekend. Warmer
temperatures will return for the beginning of next week with
another chance of thunderstorms.

&&

.AVIATION...(For the 00Z TAFS through 00Z Thursday evening)
Issued at 646 PM CDT Wed Aug 10 2016

A warm frontal boundary stretched from northern Wisconsin west
across central Minnesota into South Dakota early this evening.
Strong thunderstorms were occurring from northern Minnesota and
Upper Michigan into South Dakota. These storms were north of,
along, and south of the front with the boundary, warm air
advection, FGEN all contributing to lifting a very moist airmass
with PWAT values 1.6 to 2 inches across the region. The storms
were ACTING to suppress the northward movement of the front for
the time but as the night progresses and the LLJ increases, we
expect additional storm development. IFR and even brief LIFR
conditions have occurred as the strongest storms moved through and
we expect that to continue. We also expect a gradual drop in
ceilings to MVFR and even IFR overnight with the lowest
VSBYS/ceilings around Lake Superior where an onshore flow will
persist.

The front will lift further north on Thursday and an area of low
pressure and cold front will then move into the region. More
showers/storms will be possible through Thursday and they may have
to be included in more of the TAF sites and later updates will
continue to refine the timing.

&&

.PRELIMINARY POINT TEMPS/POPS...
DLH  61  78  64  76 / 100  90  60  20
INL  62  79  59  75 /  90  40  30  50
BRD  69  84  65  79 /  90  60  30  10
HYR  70  86  65  80 /  80  80  70  20
ASX  63  82  63  77 /  90 100  70  30

&&

.DLH Watches/Warnings/Advisories...
WI...Flash Flood Watch through Thursday morning for WIZ001-006.

     Beach Hazards Statement until 5 AM CDT Thursday for WIZ001.

MN...Flash Flood Watch through Thursday morning for MNZ018-019-025-
     026-033>038.

     Beach Hazards Statement until 5 AM CDT Thursday for MNZ037.

LS...Small Craft Advisory until 5 AM CDT Thursday for LSZ121-140>148.

&&

SHORT TERM...DAP
LONG TERM...Stewart
AVIATION...Melde

Hazardous weather outlook, Aug 10, 3:51 PM CDT, 3 hours 42 minutes before

HAZARDOUS WEATHER OUTLOOK
NATIONAL WEATHER SERVICE DULUTH MN
351 PM CDT WED AUG 10 2016

MNZ010>012-018>021-025-026-033>038-WIZ001>004-006>009-111030-
KOOCHICHING-NORTH ST. LOUIS-NORTHERN COOK/NORTHERN LAKE-
NORTH ITASCA-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-
PINE-DOUGLAS-BAYFIELD-ASHLAND-IRON-BURNETT-WASHBURN-SAWYER-PRICE-
351 PM CDT WED AUG 10 2016

THIS HAZARDOUS WEATHER OUTLOOK IS FOR PORTIONS OF NORTHEAST
MINNESOTA AND NORTHWEST WISCONSIN.

.DAY ONE...THIS AFTERNOON AND TONIGHT

AFTER A BREAK IN THE PRECIPITATION FOR MUCH OF THE AREA THIS
AFTERNOON...WE WILL SEE REDEVELOPMENT OF THUNDERSTORMS LATE THIS
AFTERNOON AND INTO THIS EVENING AS STORMS DEVELOP ALONG AND NORTH
OF A DEVELOPING WARM FRONT IN CENTRAL MINNESOTA AND NORTHERN
WISCONSIN. SOME OF THE STORMS MAY BE SEVERE...WITH DAMAGING
WINDS...LARGE HAIL AND TORRENTIAL RAINFALL. THE THREAT IS
INCREASING FOR THE POTENTIAL OF FLASH FLOODING AS WELL LATER TODAY
AND ESPECIALLY TONIGHT. AS A RESULT...THE NATIONAL WEATHER SERVICE
HAS ISSUED A FLASH FLOOD WATCH FOR AREAS ALONG AND SOUTH OF THE
HIGHWAY 2 CORRIDOR IN MINNESOTA AND FAR NORTHWEST WISCONSIN. SEE
THE LATEST FLOOD PRODUCTS FOR DETAILED INFORMATION CONCERNING THE
POTENTIAL FOR FLOODING.

IN ADDITION...STRONG NORTHEAST WINDS WILL INCREASE THE THREAT OF
RIP CURRENTS TODAY AND THIS EVENING...MAINLY IN THE DULUTH ENTRY
AFFECTING PARK POINT BEACH IN DULUTH. AS A RESULT...THERE IS A
HIGH RISK OF RIP CURRENTS INTO THE NIGHT. SEE THE LATEST BEACH
HAZARDS STATEMENT FOR DETAILED INFORMATION.

.DAYS TWO THROUGH SEVEN...THURSDAY THROUGH TUESDAY

A FEW STRONG THUNDERSTORMS ARE POSSIBLE THURSDAY ACROSS NORTHWEST
WISCONSIN...WITH THE STRONGEST STORMS PRODUCING HEAVY RAINFALL AND
GUSTY WINDS. MORE STORMS ARE POSSIBLE THROUGHOUT THE PERIOD.

.SPOTTER INFORMATION STATEMENT...

SKYWARN SPOTTERS MAY BE NEEDED TONIGHT. A PRELIMINARY HEADS UP
CALL HAS ALREADY BEEN MADE TO AMATEUR RADIO GROUPS.

LSZ121-140>148-111030-
BAYFIELD TO OAK POINT WI-GRAND PORTAGE TO GRAND MARAIS MN-
GRAND MARAIS TO TACONITE HARBOR MN-
TACONITE HARBOR TO SILVER BAY HARBOR MN-
SILVER BAY HARBOR TO TWO HARBORS MN-TWO HARBORS TO DULUTH MN-
DULUTH MN TO PORT WING WI-PORT WING TO SAND ISLAND WI-
SAND ISLAND TO BAYFIELD WI-OAK POINT TO SAXON HARBOR WI-
351 PM CDT WED AUG 10 2016

THIS HAZARDOUS WEATHER OUTLOOK IS FOR PORTIONS OF THE NEARSHORE
WATERS OF WESTERN LAKE SUPERIOR.

.DAY ONE...THIS AFTERNOON AND TONIGHT

STRONG ONSHORE WINDS WILL CREATE HIGH WAVES THROUGH TONIGHT...MAKING
FOR DANGEROUS CONDITIONS FOR SMALL CRAFT. A SMALL CRAFT ADVISORY IS
IN EFFECT THROUGH TONIGHT. SEE THE LATEST MARINE PRODUCTS FOR
DETAILED INFORMATION.

STRONG TO SEVERE THUNDERSTORMS WITH HIGH WINDS AND HAIL ARE POSSIBLE
LATE THIS AFTERNOON AND TONIGHT.

.DAYS TWO THROUGH SEVEN...THURSDAY THROUGH TUESDAY

MORE STRONG TO SEVERE THUNDERSTORMS ARE POSSIBLE THURSDAY.
THUNDERSTORMS ARE ALSO POSSIBLE INTO FROM FRIDAY INTO
SATURDAY...AND AGAIN FROM MONDAY TO WEDNESDAY NEXT WEEK.

DAP

MORE INFORMATION MAY BE OBTAINED AT THE FOLLOWING WEB ADDRESS:
HTTP://WWW.WEATHER.GOV/DULUTH (ALL LOWER CASE)

In the hours before

Special weather statement, Aug 10, 4:04 PM CDT, 3 hours 29 minutes before

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE DULUTH MN
404 PM CDT WED AUG 10 2016

MNZ025-033-102130-
SOUTH CASS-NORTH CASS-
404 PM CDT WED AUG 10 2016

...A LINE OF STRONG THUNDERSTORMS WILL AFFECT SOUTHERN CASS COUNTY...

AT 403 PM CDT...STRONG THUNDERSTORMS WERE ALONG A LINE EXTENDING FROM
NEAR HUNTERSVILLE...TO NEAR STAPLES AIRPORT...AND MOVING EAST AT 30
MPH.

WIND GUSTS UP TO 50 MPH...PENNY SIZE HAIL...TORRENTIAL RAINFALL...AND
FREQUENT CLOUD TO GROUND LIGHTNING CAN BE EXPECTED WITH THESE STORMS.

LOCATIONS IMPACTED INCLUDE...
PINE RIVER...PILLAGER...HACKENSACK...BACKUS...POPLAR...GULL LAKE...
LEADER...SYLVAN...EAST GULL LAKE...LAKE SHORE...OSHAWA...JENKINS...
TEN MILE LAKE...CHICKAMAW BEACH...PONTORIA...PHEASANT LAKE...
CASINO...WEBB LAKE...ESTERDY AND BIG PORTAGE LAKE.

IF YOU ARE ON OR NEAR ONE OF THE MANY AREA LAKES...GET OFF OF THE
WATER IMMEDIATELY AND SEEK SHELTER ON SHORE INSIDE A STURDY BUILDING.

TORRENTIAL RAINFALL IS OCCURRING WITH THESE STORMS...AND MAY CAUSE
LOCALIZED FLOODING. DO NOT DRIVE INTO AREAS WHERE WATER COVERS THE
ROAD.

LAT...LON 4680 9479 4680 9466 4699 9466 4703 9433
      4630 9435 4633 9443 4633 9446 4630 9454
      4636 9467 4635 9472 4638 9473 4639 9478
TIME...MOT...LOC 2103Z 258DEG 26KT 4681 9480 4645 9479

 MILLER

Special weather statement, Aug 10, 4:59 PM CDT, 2 hours 34 minutes before

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE DULUTH MN
459 PM CDT WED AUG 10 2016

MNZ033-034-102230-
SOUTH CASS-CROW WING-
459 PM CDT WED AUG 10 2016

...AN AREA OF STRONG THUNDERSTORMS WITH TORRENTIAL RAINFALL
WILL MOVE ACROSS THE ENTIRE BRAINERD LAKES REGION...

AT 459 PM CDT...AN AREA OF STRONG THUNDERSTORMS THAT WAS PRODUCING
EXTREMELY HEAVY RAINFALL WAS LOCATED OVER THE ENTIRE BRAINERD
LAKES AREA...MOVING EAST AT 30 MPH.

WIND GUSTS UP TO 40 MPH...TORRENTIAL RAINFALL RATES OF 2 TO 4 INCHES
PER HOUR...AND FREQUENT CLOUD TO GROUND LIGHTNING CAN BE EXPECTED
WITH THESE STORMS.

LOCATIONS IMPACTED INCLUDE...
BRAINERD...MILLE LACS LAKE...BAXTER...CROSBY...BREEZY POINT...
PEQUOT LAKES...CROSSLAKE...NISSWA...IRONTON...DEERWOOD...PILLAGER...
CUYUNA...GARRISON...FORT RIPLEY...GULL LAKE...MERRIFIELD...
SAINT MATHIAS...UPPER SOUTH LONG LAKE...SOUTH LONG LAKE AND SYLVAN.

SEEK SHELTER INSIDE A STURDY BUILDING AND AWAY FROM WINDOWS UNTIL
THESE STORMS PASS. IF YOU ARE ON OR NEAR ONE OF THE MANY AREA
LAKES...GET OFF OF THE WATER IMMEDIATELY AND SEEK SHELTER ON SHORE
INSIDE A STURDY BUILDING.

TORRENTIAL RAINFALL IS OCCURRING WITH THESE STORMS...AND MAY CAUSE
LOCALIZED FLOODING. DO NOT DRIVE INTO AREAS WHERE WATER COVERS THE
ROAD.

LAT...LON 4664 9450 4667 9381 4616 9381 4616 9437
      4618 9437 4621 9439 4623 9439 4627 9434
      4629 9435 4630 9439 4633 9443 4633 9446
      4630 9453 4632 9458
TIME...MOT...LOC 2157Z 268DEG 25KT 4644 9434

 MILLER

Special weather statement, Aug 10, 5:28 PM CDT, 2 hours 5 minutes before

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE DULUTH MN
528 PM CDT WED AUG 10 2016

MNZ034-036-102300-
SOUTH AITKIN-CROW WING-
528 PM CDT WED AUG 10 2016

...AN AREA OF STRONG THUNDERSTORMS PRODUCING TORRENTIAL RAINFALL
WILL AFFECT AREAS FROM BRAINERD TO LAKE MILLE LACS...

AT 528 PM CDT...AN AREA OF STRONG THUNDERSTORMS PRODUCING EXTREMELY
HEAVY RAINFALL RATES WAS LOCATED BETWEEN BRAINERD AND GARRISON...OR
JUST NORTHWEST OF MILLE LACS LAKE...MOVING EAST AT 30 MPH.

WIND GUSTS UP TO 35 MPH...TORRENTIAL RAINFALL RATES BETWEEN 2 AND 4
INCHES PER HOUR...AND FREQUENT CLOUD TO GROUND LIGHTNING CAN BE
EXPECTED WITH THESE STORMS.

LOCATIONS IMPACTED INCLUDE...
BRAINERD...MILLE LACS LAKE...CROSBY...AITKIN...IRONTON...DEERWOOD...
MCGREGOR...MALMO...CUYUNA...GARRISON...MCGRATH...
UPPER SOUTH LONG LAKE...SOUTH LONG LAKE...CEDAR LAKE...BAY LAKE...
GLEN...WOLFORD...WEALTHWOOD...CAMP LAKE AND KIMBERLY.

SEEK SHELTER INSIDE A STURDY BUILDING AND AWAY FROM WINDOWS UNTIL
THESE STORMS PASS. IF YOU ARE ON OR NEAR ONE OF THE MANY AREA
LAKES...GET OFF OF THE WATER IMMEDIATELY AND SEEK SHELTER ON SHORE
INSIDE A STURDY BUILDING.

TORRENTIAL RAINFALL IS OCCURRING WITH THESE STORMS...AND MAY CAUSE
LOCALIZED FLOODING. DO NOT DRIVE INTO AREAS WHERE WATER COVERS THE
ROAD.

A SEVERE THUNDERSTORM WATCH REMAINS IN EFFECT UNTIL MIDNIGHT CDT FOR
EAST CENTRAL MINNESOTA.

LAT...LON 4658 9408 4660 9314 4616 9329 4615 9343
      4624 9343 4625 9344 4624 9381 4616 9381
      4616 9424
TIME...MOT...LOC 2225Z 267DEG 25KT 4633 9388

 MILLER

Special weather statement, Aug 10, 6:20 PM CDT, 1 hour 13 minutes before

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE DULUTH MN
620 PM CDT WED AUG 10 2016

MNZ012-020-102345-
SOUTHERN LAKE/NORTH SHORE-NORTHERN COOK/NORTHERN LAKE-
620 PM CDT WED AUG 10 2016

...AN AREA OF THUNDERSTORMS PRODUCING VERY HEAVY RAINFALL
WILL CONTINUE TO AFFECT MUCH OF SOUTHERN LAKE COUNTY THROUGH 7 PM...

AT 620 PM CDT...AN AREA OF THUNDERSTORMS WAS LOCATED FROM JUST
NORTHEAST OF BRIMSON TO SILVER BAY...MOVING VERY SLOWLY
NORTHEASTWARD AT 5 TO 10 MPH.

WIND GUSTS UP TO 30 MPH...TORRENTIAL RAINFALL...AND FREQUENT CLOUD TO
GROUND LIGHTNING CAN BE EXPECTED WITH THESE STORMS.

LOCATIONS IMPACTED INCLUDE...
SPLIT ROCK LIGHTHOUSE STATE PARK...SILVER BAY...BEAVER BAY...
THOMAS LAKE NEAR BRIMSON...FINLAND...HIGHLAND LAKE...WHYTE...
LITTLE MARAIS...ILLGEN CITY...TETTGOUCHE STATE PARK...
GEORGE MANITOU STATE PARK...
AND HIGHWAY 61 BETWEEN SILVER BAY AND LITTLE MARAIS.

TORRENTIAL RAINFALL IS OCCURRING WITH THESE STORMS...AND MAY CAUSE
LOCALIZED FLOODING...ESPECIALLY NEAR RIVERS AND STREAMS THAT DRAIN
INTO LAKE SUPERIOR. DO NOT DRIVE INTO AREAS WHERE WATER COVERS THE
ROAD...AND MOVE AWAY FROM RIVERS AND STREAMS.

LAT...LON 4740 9104 4736 9111 4725 9121 4718 9131
      4721 9178 4748 9177 4746 9103
TIME...MOT...LOC 2316Z 268DEG 30KT 4731 9137

 MILLER

Local storm report, Aug 10, 7:03 PM CDT, 30 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE DULUTH MN
703 PM CDT WED AUG 10 2016

..TIME...   ...EVENT...      ...CITY LOCATION...     ...LAT.LON...
..DATE...   ....MAG....      ..COUNTY LOCATION..ST.. ...SOURCE....
            ..REMARKS..

0650 PM     HEAVY RAIN       SILVER BAY              47.29N 91.28W
08/10/2016  M2.00 INCH       LAKE               MN   TRAINED SPOTTER

            0.66 INCHES IN THE BETWEEN 6:15 AND 6:45PM.

&&

SG

Special weather statement, Aug 10, 7:20 PM CDT, 13 minutes before

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE DULUTH MN
720 PM CDT WED AUG 10 2016

MNZ038-WIZ006-110045-
PINE-BURNETT-
720 PM CDT WED AUG 10 2016

...A LINE OF STRONG THUNDERSTORMS WILL AFFECT SOUTHERN PINE AND
SOUTHWESTERN BURNETT COUNTIES...

AT 719 PM CDT...STRONG THUNDERSTORMS WERE ALONG A LINE EXTENDING FROM
NEAR SANDSTONE...TO 7 MILES NORTHWEST OF GRANTSBURG...TO 6 MILES EAST
OF RUSH CITY...AND MOVING EAST AT 30 MPH.

WIND GUSTS UP TO 45 MPH...TORRENTIAL RAINFALL...AND FREQUENT CLOUD TO
GROUND LIGHTNING CAN BE EXPECTED WITH THESE STORMS.

LOCATIONS IMPACTED INCLUDE...
PINE CITY...HINCKLEY...SANDSTONE...ROCK CREEK...GRANTSBURG...
TRADE LAKE...BRANSTAD...DUXBURY...RANDALL...BEROUN...ALPHA...FALUN...
FOUR CORNERS...CLOVERDALE...PHANTOM LAKE...FRIESLAND...
SAINT CROIX STATE PARK...TRADE RIVER...
GRINDSTONE LAKE PINE COUNTY AND BANNING STATE PARK.

THIS ALSO AFFECTS INTERSTATE 35 BETWEEN SANDSTONE AND RUSH CITY.

SEEK SHELTER INSIDE A STURDY BUILDING AND AWAY FROM WINDOWS UNTIL
THESE STORMS PASS. GET OFF AREA LAKES IMMEDIATELY AND SEEK SHELTER
ON SHORE IN A STURDY BUILDING.

TORRENTIAL RAINFALL IS OCCURRING WITH THESE STORMS...AND MAY CAUSE
LOCALIZED FLOODING. DO NOT DRIVE INTO AREAS WHERE WATER COVERS THE
ROAD.

LAT...LON 4568 9288 4573 9285 4573 9301 4587 9298
      4611 9301 4614 9247 4585 9245 4574 9247
      4573 9253 4564 9253 4564 9289
TIME...MOT...LOC 0019Z 277DEG 27KT 4608 9284 4588 9276 4566 9284

 MILLER

The office that day

Everything else NWS Duluth, MN issued on the same UTC day.

Issued	Product	Office	Counties	Lasted
Aug 10, 7:20 PM CDT	Special Weather Statement	DLH	Pine	25 min
Aug 10, 9:57 PM CDT	Flash Flood Warning	DLH	Lake	4 hr
Aug 11, 3:15 AM CDT	Special Weather Statement	DLH	Koochiching	30 min
Aug 11, 3:53 AM CDT	Areal Flood Advisory	DLH	Koochiching	112 min
Aug 11, 10:03 AM CDT	Beach Hazards Statement	DLH	Carlton, Saint Louis	9 hr

Nearby

Flash Flood Warnings in Minnesota, 2016 Every flash flood warning in 2016

Sources

The product and its follow-ups from the Iowa Environmental Mesonet's archive of National Weather Service and Storm Prediction Center text; local storm reports from the same archive; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.