Alert archive / Minnesota / Areal Flood Advisories in 2013

Areal Flood Advisory 1, NWS Twin Cities, MN

May 18, 20134 counties in Minnesota

NWS Twin Cities, MN issued this areal flood advisory at May 18, 2013, 7:42 AM CDT for 4 counties in Minnesota. It was in force for 3 hr.

The area

The counties it named.

The facts

Issued: May 18, 2013, 7:42 AM CDT (12:42 UTC)
Expired: May 18, 2013, 10:30 AM CDT
In force: 3 hr
Issued by: NWS Twin Cities, MN
Area: Storm-based polygon

Counties Carver County, MN, Dakota County, MN, Hennepin County, MN, Wright County, MN

The radar

The Minneapolis radar (KMPX), 8 km from the middle of the area, began a volume at 12:44 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

Aberdeen, SD (KABR), launched 12:00Z, 0.7 hours before the alert went out and 380 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: 120 J/kg
Mixed-layer CIN: -230 J/kg
Mixed-layer LCL: 921 m above ground
0-6 km bulk shear: 18 kt
0-1 km storm-relative helicity: 89 m²/s²
0-3 km storm-relative helicity: 186 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.1

Open this sounding in Storm Lab

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 Twin Cities, MN wrote its last area forecast discussion before this areal flood advisory went out at May 18, 7:17 AM CDT, 25 minutes earlier.

Area forecast discussion, May 18, 7:17 AM CDT, 25 minutes before

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Hazardous weather outlook, May 18, 4:04 AM CDT, 3 hours 38 minutes before

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In the hours before

Local storm report, May 18, 1:53 AM CDT, 5 hours 49 minutes before

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Local storm report, May 18, 1:55 AM CDT, 5 hours 47 minutes before

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Special weather statement, May 18, 2:00 AM CDT, 5 hours 42 minutes before

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Local storm report, May 18, 2:10 AM CDT, 5 hours 32 minutes before

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Special weather statement, May 18, 2:34 AM CDT, 5 hours 8 minutes before

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The office that day

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

Issued	Product	Office	Counties	Lasted
May 17, 11:24 PM CDT	Special Weather Statement	MPX	Todd	51 min
May 18, 1:17 AM CDT	Special Weather Statement	MPX	Pope	28 min
May 18, 1:40 AM CDT	Severe Thunderstorm Warning	MPX	Douglas, Pope, Stearns, Todd	50 min
May 18, 2:00 AM CDT	Special Weather Statement	MPX	Douglas	30 min
May 18, 2:34 AM CDT	Special Weather Statement	MPX	Stearns	41 min
May 18, 9:08 AM CDT	Special Weather Statement	MPX	Carver, Hennepin, Ramsey	37 min
May 18, 2:44 PM CDT	Flash Flood Watch	MPX	Anoka, Benton, Carver, Chisago, Dakota, Douglas and 25 more	44 hr
May 18, 6:54 PM CDT	Special Weather Statement	MPX	Douglas	51 min
May 18, 6:59 PM CDT	Severe Thunderstorm Warning	MPX	Douglas	61 min

Nearby

Areal Flood Advisories in Minnesota, 2013 Every areal flood advisory 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.