Alert archive / Minnesota / Winter Weather Advisories in 2018
Winter Weather Advisory 20, NWS Twin Cities, MN
NWS Twin Cities, MN issued this winter weather advisory at Apr 17, 2018, 3:18 AM CDT for 18 counties in Minnesota. It took effect at Apr 18, 2018, 4:00 AM CDT. It was in force for 15 hr.
The area
The counties it named.
The facts
- Issued
- Apr 17, 2018, 3:18 AM CDT (08:18 UTC)
- In effect from
- Apr 18, 2018, 4:00 AM CDT
- Expired
- Apr 18, 2018, 7:00 PM CDT
- In force
- 15 hr
- Issued by
- NWS Twin Cities, MN
Counties Blue Earth County, MN, Brown County, MN, Carver County, MN, Dakota County, MN, Goodhue County, MN, Lac qui Parle County, MN, Le Sueur County, MN, McLeod County, MN, Nicollet County, MN, Redwood County, MN, Renville County, MN, Rice County, MN, Scott County, MN, Sibley County, MN, Steele County, MN, Waseca County, MN, Watonwan County, MN, Yellow Medicine County, MN
The radar
The Minneapolis radar (KMPX), 66 km from the middle of the area, began a volume at 08:15 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 00:00Z, 8.3 hours before the alert went out and 64 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
- 0 J/kg
- Mixed-layer CIN
- No buoyant parcel
- Mixed-layer LCL
- 1261 m above ground
- 0-6 km bulk shear
- 63 kt
- 0-1 km storm-relative helicity
- 22 m²/s²
- 0-3 km storm-relative helicity
- 19 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
What forecasters said that day
The local office's own words before this winter weather 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 winter weather advisory went out at Apr 16, 10:30 PM CDT, 4 hours 48 minutes earlier.
Area forecast discussion, Apr 16, 10:30 PM CDT, 4 hours 48 minutes before
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</html>The office that day
Everything else NWS Twin Cities, MN issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Apr 16, 8:37 PM CDT | River Flood Warning | MPX | Redwood | 41 hr |
| Apr 17, 3:18 AM CDT | Winter Storm Warning | MPX | Faribault, Freeborn, Martin, Steele, Waseca | 40 hr |
Nearby
Winter Weather Advisories in Minnesota, 2018Every winter weather advisory 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.