Alert archive / North Dakota / Flash Flood Watches in 2013

Flash Flood Watch 1, NWS Bismarck, ND

May 27, 201312 counties in North Dakota

NWS Bismarck, ND issued this flash flood watch at May 27, 2013, 2:37 PM MDT for 12 counties in North Dakota. It was in force for 9 hr.

The area

The counties it named.

The facts

Issued: May 27, 2013, 2:37 PM MDT (20:37 UTC)
Expired: May 27, 2013, 11:48 PM MDT
In force: 9 hr
Issued by: NWS Bismarck, ND
Flood severity: None

Counties Adams County, ND, Bowman County, ND, Burleigh County, ND, Dunn County, ND, Emmons County, ND, Grant County, ND, Hettinger County, ND, Mercer County, ND, Oliver County, ND, Sheridan County, ND, Slope County, ND, Stark County, ND

The radar

The Bismarck radar (KBIS), 89 km from the middle of the area, began a volume at 20:39 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

Rapid City, SD (KUNR), launched 12:00Z, 8.6 hours before the alert went out and 306 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: 832 J/kg
Mixed-layer CIN: -71 J/kg
Mixed-layer LCL: 578 m above ground
0-6 km bulk shear: 33 kt
0-1 km storm-relative helicity: 33 m²/s²
0-3 km storm-relative helicity: 147 m²/s²
Significant tornado parameter: 0.5
Supercell composite: 5.2

Open this sounding in Storm Lab

What forecasters said that day

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

Hazardous weather outlook, May 26, 2:47 PM MDT, 23 hours 50 minutes before

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The office that day

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

Issued	Product	Office	Counties	Lasted
May 27, 4:40 PM MDT	Areal Flood Advisory	BIS	Grant, Morton, Sioux	6 hr

Nearby

Flash Flood Watches in North Dakota, 2013 Every flash flood watch in 2013

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.