Alert archive / Minnesota / Flash Flood Warnings in 2018
Flash Flood Warning 15, NWS Duluth, MN
NWS Duluth, MN issued this flash flood warning at Jul 12, 2018, 12:34 AM CDT for Itasca County, Koochiching County, Minnesota. It was in force for 3 hr. No storm report in the archive falls inside the area while it was in force.
The area
The counties it named.
The facts
- Issued
- Jul 12, 2018, 12:34 AM CDT (05:34 UTC)
- Expired
- Jul 12, 2018, 3:19 AM CDT
- In force
- 3 hr
- Issued by
- NWS Duluth, MN
- Area
- Storm-based polygon
- Flood severity
- None
Counties Itasca County, MN, Koochiching County, MN
The radar
The Duluth radar (KDLH), 162 km from the middle of the area, began a volume at 05:36 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.
The nearest sounding before it
International Fa, MN (KINL), launched 00:00Z, 5.6 hours before the alert went out and 83 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.
- Mixed-layer CAPE
- 626 J/kg
- Mixed-layer CIN
- -198 J/kg
- Mixed-layer LCL
- 938 m above ground
- 0-6 km bulk shear
- 40 kt
- 0-1 km storm-relative helicity
- 244 m²/s²
- 0-3 km storm-relative helicity
- 416 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 4.1
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 Jul 12, 12:10 AM CDT, 24 minutes earlier.
Area forecast discussion, Jul 12, 12:10 AM CDT, 24 minutes before
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</html>Hazardous weather outlook, Jul 11, 3:13 PM CDT, 9 hours 21 minutes before
Hazardous Weather Outlook National Weather Service Duluth MN 313 PM CDT Wed Jul 11 2018 MNZ010>012-018>021-025-026-033>038-WIZ001>004-006>009-121200- 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- 313 PM CDT Wed Jul 11 2018 This Hazardous Weather Outlook is for portions of northeast Minnesota and northwest Wisconsin. .DAY ONE...This afternoon and Tonight Strong northeast winds will increase the threat of rip currents today through this evening for areas near the Twin Ports, including the beaches of Duluth and Superior. A Beach Hazards Statement has been issued for these areas. Strong to severe storms are likely to develop across north- central Minnesota late this afternoon or this evening, tracking southeast across much of northeast Minnesota and parts of northwest Wisconsin this evening and overnight. These storms could produce very large hail, damaging winds, tornadoes, and flash flooding. Areas of north-central Minnesota from the Brainerd Lakes region north to the international border are at the greatest risk for very large hail and tornadoes. A Flash Flood Watch has been issued for much of central and northeast MN, and parts of far northwest Wisconsin, tonight through early Thursday. .DAYS TWO THROUGH SEVEN...Thursday through Tuesday Thunderstorms will remain possible Thursday and Thursday evening, mainly over northwest Wisconsin. Some of those storms could be severe and produce heavy rainfall over portions of northwest Wisconsin Thursday afternoon and evening. A chance of thunderstorms returns to the area Saturday night and Sunday. .SPOTTER INFORMATION STATEMENT... Skywarn Spotters will likely be needed very late this afternoon and this evening. LSZ121-140>148-121200- 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- 313 PM CDT Wed Jul 11 2018 This Hazardous Weather Outlook is for portions of the Nearshore waters of western Lake Superior. .DAY ONE...This afternoon and Tonight A Small Craft Advisory remains in effect from Taconite Harbor, to Duluth, to Bayfield into the evening. In addition to the high winds and waves, we will likely see numerous thunderstorms develop overnight. Some of the storms may be strong to severe with damaging winds and large hail. .DAYS TWO THROUGH SEVEN...Thursday through Tuesday Thunderstorms are possible from Saturday night into Sunday night. DAP/G2 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, Jul 11, 8:58 PM CDT, 3 hours 36 minutes before
Special Weather Statement
National Weather Service Duluth MN
858 PM CDT WED JUL 11 2018
MNZ010-120230-
Koochiching-
858 PM CDT WED JUL 11 2018
...A STRONG THUNDERSTORMS APPROACHING WESTERN KOOCHICHING COUNTY...
At 858 PM CDT, an area of strong to severe thunderstorms in the Red
Lake and Waskish areas, continued to moving northeast at 30 mph. If
these storms maintain their present strength and movement, they will
begin affecting much of western Koochiching County between 900 and
1000 PM CDT.
Wind gusts in excess of 60 mph, quarter size or larger hail,
torrential rainfall, and frequent cloud to ground lightning will all
be possible, and severe thunderstorm warnings may be needed
Please monitor local media outlets for additional information and
possible warnings from the National Weather Service over the next
hour, and be prepared to seek shelter. Remember that a tornado
watch remains in effect until 100 AM CDT.
LAT...LON 4871 9429 4869 9425 4866 9425 4865 9423
4863 9393 4825 9399 4811 9442 4871 9442
TIME...MOT...LOC 0154Z 242DEG 26KT 4831 9450
MillerSpecial weather statement, Jul 11, 9:32 PM CDT, 3 hours 2 minutes before
Special Weather Statement
National Weather Service Duluth MN
932 PM CDT WED JUL 11 2018
MNZ010-120245-
Koochiching-
932 PM CDT WED JUL 11 2018
...A STRONG THUNDERSTORM WILL AFFECT NORTHWESTERN KOOCHICHING
COUNTY...
At 932 PM CDT, a strong thunderstorm was 10 miles west of Birchdale,
moving northeast at 35 mph.
Wind gusts up to 50 mph, penny-size hail, torrential rainfall, and
frequent cloud to ground lightning can be expected with this storm.
Locations impacted include...
Birchdale and Manitou.
Seek shelter inside a sturdy building and away from windows until
this storm passes. Get off area lakes and seek shelter on shore in a
sturdy shelter or a hard-topped vehicle.
LAT...LON 4871 9438 4870 9435 4871 9429 4869 9426
4866 9426 4865 9423 4864 9413 4864 9400
4854 9393 4839 9443 4867 9443 4871 9442
TIME...MOT...LOC 0231Z 245DEG 31KT 4857 9432
MillerThe office that day
Everything else NWS Duluth, MN issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jul 11, 8:58 PM CDT | Special Weather Statement | DLH | Koochiching | 32 min |
| Jul 11, 9:32 PM CDT | Special Weather Statement | DLH | Koochiching | 13 min |
| Jul 11, 9:37 PM CDT | Severe Thunderstorm Warning | DLH | Koochiching | 38 min |
| Jul 11, 10:20 PM CDT | Severe Thunderstorm Warning | DLH | Koochiching | 40 min |
| Jul 11, 10:42 PM CDT | Tornado Warning | DLH | Koochiching | 33 min |
| Jul 11, 11:10 PM CDT | Severe Thunderstorm Warning | DLH | Itasca, Koochiching | 50 min |
| Jul 11, 11:42 PM CDT | Severe Thunderstorm Warning | DLH | Cass | 48 min |
| Jul 11, 11:59 PM CDT | Severe Thunderstorm Warning | DLH | Aitkin, Cass, Itasca | 46 min |
| Jul 12, 12:18 AM CDT | Severe Thunderstorm Warning | DLH | Cass, Crow Wing | 42 min |
| Jul 12, 12:42 AM CDT | Severe Thunderstorm Warning | DLH | Aitkin, Cass, Itasca, Saint Louis | 48 min |
| Jul 12, 12:53 AM CDT | Severe Thunderstorm Warning | DLH | Aitkin, Cass, Crow Wing | 37 min |
| Jul 12, 12:59 AM CDT | Special Weather Statement | DLH | Saint Louis | 31 min |
| Jul 12, 1:16 AM CDT | Severe Thunderstorm Warning | DLH | Cass, Crow Wing | 29 min |
| Jul 12, 1:27 AM CDT | Severe Thunderstorm Warning | DLH | Aitkin, Carlton, Itasca, Saint Louis | 48 min |
| Jul 12, 1:33 AM CDT | Special Weather Statement | DLH | Saint Louis | 42 min |
| Jul 12, 1:47 AM CDT | Special Weather Statement | DLH | Crow Wing | 28 min |
| Jul 12, 1:56 AM CDT | Severe Thunderstorm Warning | DLH | Aitkin, Cass, Crow Wing | 49 min |
| Jul 12, 2:14 AM CDT | Special Weather Statement | DLH | Carlton | 16 min |
| Jul 12, 2:15 AM CDT | Special Weather Statement | DLH | Saint Louis | 45 min |
| Jul 12, 2:19 AM CDT | Flash Flood Warning | DLH | Aitkin, Cass, Crow Wing, Itasca | 4 hr |
| Jul 12, 2:22 AM CDT | Severe Thunderstorm Warning | DLH | Saint Louis | 38 min |
| Jul 12, 2:31 AM CDT | Special Marine Warning | DLH | 47 min | |
| Jul 12, 2:41 AM CDT | Severe Thunderstorm Warning | DLH | Aitkin, Carlton, Cass, Crow Wing | 49 min |
| Jul 12, 3:00 AM CDT | Flash Flood Warning | DLH | Aitkin, Carlton, Cass, Crow Wing, Pine, Saint Louis | 3 hr |
| Jul 12, 3:17 AM CDT | Areal Flood Warning | DLH | Itasca, Koochiching, Saint Louis | 9 hr |
| Jul 12, 3:34 AM CDT | Special Weather Statement | DLH | Pine | 26 min |
| Jul 12, 3:53 AM CDT | Special Weather Statement | DLH | Pine | 37 min |
| Jul 12, 4:07 AM CDT | Small Craft Advisory | DLH | 12 hr | |
| Jul 12, 4:20 AM CDT | Flash Flood Warning | DLH | Pine | 5 hr |
| Jul 12, 4:24 AM CDT | Special Weather Statement | DLH | Pine | 36 min |
| Jul 12, 5:57 AM CDT | Flash Flood Warning | DLH | Aitkin, Crow Wing, Pine | 4 hr |
| Jul 12, 6:21 AM CDT | Special Weather Statement | DLH | Pine | 24 min |
| Jul 12, 6:28 AM CDT | Severe Thunderstorm Warning | DLH | Pine | 13 min |
| Jul 12, 9:42 AM CDT | Areal Flood Warning | DLH | Aitkin, Carlton, Crow Wing, Pine | 6 hr |
| Jul 12, 11:45 AM CDT | Special Weather Statement | DLH | Chisago | 15 min |
| Jul 12, 4:01 PM CDT | River Flood Warning | DLH | Aitkin, Crow Wing | 42 hr |
| Jul 12, 8:31 AM CDT | Special Weather Statement | DLH | Burnett | 29 min |
| Jul 12, 9:01 AM CDT | Special Weather Statement | DLH | Burnett | 29 min |
| Jul 12, 9:30 AM CDT | Special Weather Statement | DLH | Burnett | 30 min |
| Jul 12, 11:09 AM CDT | Special Weather Statement | DLH | Burnett | 36 min |
| Jul 12, 5:15 PM CDT | Special Weather Statement | DLH | Burnett | 30 min |
| Jul 12, 5:57 PM CDT | Special Weather Statement | DLH | Burnett, Washburn | 33 min |
| Jul 12, 6:34 PM CDT | Special Weather Statement | DLH | Washburn | 26 min |
| Jul 12, 6:52 PM CDT | Special Weather Statement | DLH | Washburn | 23 min |
Nearby
Flash Flood Warnings in Minnesota, 2018Every flash flood warning in 2018
Sources
The product and its follow-ups from the Iowa Environmental Mesonet's archive of National Weather Service and Storm Prediction Center text; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.