Alert archive / North Dakota / Areal Flood Warnings in 2011

Areal Flood Warning 8, NWS Grand Forks, ND

April 13, 20115 counties in North Dakota; 4 counties in Minnesota

NWS Grand Forks, ND issued this areal flood warning at Apr 13, 2011, 2:04 PM CDT for 5 counties in North Dakota; 4 counties in Minnesota. It took effect at Apr 13, 2011, 2:09 PM CDT. It was in force for 3 days. No storm report in the archive falls inside the area while it was in force.

The area

The counties it named.

The facts

Issued: Apr 13, 2011, 2:04 PM CDT (19:04 UTC)
In effect from: Apr 13, 2011, 2:09 PM CDT
Expired: Apr 16, 2011, 3:00 PM CDT
In force: 3 days
Issued by: NWS Grand Forks, ND
Area: Storm-based polygon
Flood severity: None

Counties Clay County, MN, Grant County, MN, Otter Tail County, MN, Wilkin County, MN, Barnes County, ND, Cass County, ND, Ransom County, ND, Richland County, ND, Sargent County, ND

The radar

The Fargo/Grand Forks radar (KMVX), 121 km from the middle of the area, began a volume at 19:04 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

Minneapolis, MN (KMPX), launched 12:00Z, 7.1 hours before the alert went out and 315 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: 1071 m above ground
0-6 km bulk shear: 36 kt
0-1 km storm-relative helicity: -52 m²/s²
0-3 km storm-relative helicity: 52 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

Open this sounding in Storm Lab

What forecasters said that day

The local office's own words before this areal flood warning 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 warning went out at Apr 13, 10:44 AM CDT, 3 hours 20 minutes earlier.

Area forecast discussion, Apr 13, 10:44 AM CDT, 3 hours 20 minutes before

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Hazardous weather outlook, Apr 13, 6:58 AM CDT, 7 hours 6 minutes before

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The office that day

Everything else NWS Grand Forks, ND issued on the same UTC day.

Issued	Product	Office	Counties	Lasted
Apr 13, 12:03 PM CDT	Flash Flood Warning	FGF	Barnes	6 hr
Apr 13, 1:46 PM CDT	Areal Flood Warning	FGF	Grand Forks, Traill, Walsh	3 days

Nearby

Areal Flood Warnings in North Dakota, 2011 Areal Flood Warnings in Minnesota, 2011 Every areal flood warning in 2011

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.