Alert archive / Michigan / Frost Advisories in 2018
Frost Advisory 1, NWS Marquette, MI
NWS Marquette, MI issued this frost advisory at Sep 21, 2018, 3:20 PM EDT for 11 counties in Michigan. It took effect at Sep 22, 2018, 1:00 AM EDT. It was in force for 8 hr.
The area
The counties it named.
The facts
- Issued
- Sep 21, 2018, 3:20 PM EDT (19:20 UTC)
- In effect from
- Sep 22, 2018, 1:00 AM EDT
- Expired
- Sep 22, 2018, 9:00 AM EDT
- In force
- 8 hr
- Issued by
- NWS Marquette, MI
Counties Alger County, MI, Baraga County, MI, Delta County, MI, Dickinson County, MI, Gogebic County, MI, Houghton County, MI, Iron County, MI, Marquette County, MI, Menominee County, MI, Ontonagon County, MI, Schoolcraft County, MI
The radar
The Marquette radar (KMQT), 36 km from the middle of the area, began a volume at 19:19 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
Green Bay/Straub, WI (KGRB), launched 12:00Z, 7.3 hours before the alert went out and 206 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
- 93 J/kg
- Mixed-layer CIN
- 0 J/kg
- Mixed-layer LCL
- 547 m above ground
- 0-6 km bulk shear
- 75 kt
- 0-1 km storm-relative helicity
- 14 m²/s²
- 0-3 km storm-relative helicity
- 85 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.2
What forecasters said that day
The local office's own words before this frost advisory went out, as it sent them, from the Iowa Environmental Mesonet's archive of National Weather Service text.
NWS Marquette, MI wrote its last area forecast discussion before this frost advisory went out at Sep 20, 6:51 PM EDT, 20 hours 29 minutes earlier.
Area forecast discussion, Sep 20, 6:51 PM EDT, 20 hours 29 minutes before
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</html>The office that day
Everything else NWS Marquette, MI issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Sep 20, 11:01 PM EDT | Special Marine Warning | MQT | 29 min | |
| Sep 21, 4:23 AM EDT | Wind Advisory | MQT | Alger, Houghton, Keweenaw, Luce, Marquette, Schoolcraft | 18 hr |
| Sep 21, 4:30 AM EDT | Beach Hazards Statement | MQT | Schoolcraft | 16 hr |
| Sep 21, 4:33 PM EDT | Small Craft Advisory | MQT | 16 hr |
Nearby
Frost Advisories in Michigan, 2018Every frost 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.