Alert archive / Minnesota / Areal Flood Advisories in 2021
Areal Flood Advisory 1, NWS Grand Forks, ND
NWS Grand Forks, ND issued this areal flood advisory at May 19, 2021, 10:48 PM CDT for Marshall County, Minnesota. It was in force for 16 hr.
The area
The counties it named.
The facts
- Issued
- May 19, 2021, 10:48 PM CDT (03:48 UTC)
- Expired
- May 20, 2021, 2:46 PM CDT
- In force
- 16 hr
- Issued by
- NWS Grand Forks, ND
- Area
- Storm-based polygon
County Marshall County, MN
The radar
The Fargo/Grand Forks radar (KMVX), 117 km from the middle of the area, began a volume at 03:49 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
Bismarck Municip, ND (KBIS), launched 00:00Z, 3.8 hours before the alert went out and 370 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
- 11 J/kg
- Mixed-layer CIN
- -162 J/kg
- Mixed-layer LCL
- 2344 m above ground
- 0-6 km bulk shear
- 18 kt
- 0-1 km storm-relative helicity
- 5 m²/s²
- 0-3 km storm-relative helicity
- 232 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
What forecasters said that day
The local office's own words before this areal flood advisory went out, as it sent them, from the Iowa Environmental Mesonet's archive of National Weather Service text.
NWS Grand Forks, ND wrote its last area forecast discussion before this areal flood advisory went out at May 19, 6:59 PM CDT, 3 hours 49 minutes earlier.
Area forecast discussion, May 19, 6:59 PM CDT, 3 hours 49 minutes before
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</html>Hazardous weather outlook, May 19, 11:55 AM CDT, 10 hours 53 minutes before
Hazardous Weather Outlook National Weather Service Grand Forks ND 1155 AM CDT Wed May 19 2021 MNZ002-003-006-009-015>017-022>024-027>032-040-NDZ039-049-052-053- 201700- Norman-Clay-Lake Of The Woods-North Beltrami-East Polk- North Clearwater-South Beltrami-Mahnomen-South Clearwater-Hubbard- West Becker-East Becker-Wilkin-West Otter Tail-East Otter Tail- Wadena-Grant-Cass-Ransom-Sargent-Richland- 1155 AM CDT Wed May 19 2021 This hazardous weather outlook is for portions of eastern North Dakota, west central and northwest Minnesota. .DAY ONE...This Afternoon and Tonight Chances for showers and thunderstorms will increase tonight. But remain below severe limits. .DAYS TWO THROUGH SEVEN...Thursday through Tuesday Additional thunderstorm activity will be possible on Thursday and again during afternoons into Friday and the upcoming weekend. At this point, any storms look like they will stay sub-severe with lightning and perhaps pea sized hail the main threats. However, much will depend on how previous day's thunderstorms play out, so stay tuned for updates. .SPOTTER INFORMATION STATEMENT... Spotter activation will not be needed. MNZ001-004-005-007-008-013-014-NDZ006>008-014>016-024-026>030-038- 054-201700- West Polk-Kittson-Roseau-West Marshall-East Marshall-Pennington- Red Lake-Towner-Cavalier-Pembina-Benson-Ramsey-Eastern Walsh-Eddy- Nelson-Grand Forks-Griggs-Steele-Traill-Barnes-Western Walsh- 1155 AM CDT Wed May 19 2021 This hazardous weather outlook is for portions of eastern North Dakota and northwest Minnesota. .DAY ONE...This Afternoon and Tonight A frontal system will move into northeastern North Dakota and far northwestern Minnesota this afternoon and evening. Scattered thunderstorms are forecast to develop along it with the risk of isolated severe storms mid afternoon into the evening. Main threats are damaging winds with the possibility of funnels or a landspout type tornado. .DAYS TWO THROUGH SEVEN...Thursday through Tuesday Additional thunderstorm activity will be possible on Thursday and again during afternoons into Friday and the upcoming weekend. At this point, any storms look like they will stay sub-severe with lightning and perhaps pea sized hail the main threats. However, much will depend on how previous day's thunderstorms play out, so stay tuned for updates. .SPOTTER INFORMATION STATEMENT... Spotter activation will not be needed. dtr
In the hours before
Special weather statement, May 19, 4:56 PM CDT, 5 hours 52 minutes before
Special Weather Statement
National Weather Service Grand Forks ND
456 PM CDT Wed May 19 2021
NDZ024-026-028-192300-
Griggs ND-Nelson ND-Eddy ND-
456 PM CDT Wed May 19 2021
...SIGNIFICANT WEATHER ADVISORY FOR SOUTH CENTRAL NELSON...NORTHERN
GRIGGS AND SOUTHEASTERN EDDY COUNTIES UNTIL 600 PM CDT...
At 455 PM CDT, Doppler radar was tracking a strong thunderstorm over
Mchenry, or 41 miles south of Devils Lake, moving northeast at 25
mph.
Pea size hail and winds in excess of 40 mph will be possible with
this storm.
This strong thunderstorm will be near...
Mose around 505 PM CDT.
Red Willow Lake around 515 PM CDT.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
To report severe weather, contact your nearest law enforcement
agency. They will relay your report to the National Weather Service
office in Grand Forks.
&&
LAT...LON 4786 9819 4764 9799 4736 9850 4759 9850
4759 9863
TIME...MOT...LOC 2155Z 203DEG 22KT 4756 9854
CJNearby
Areal Flood Advisories in Minnesota, 2021Every areal flood advisory in 2021
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.