Alert archive / Michigan / Frost Advisories in 2015

Frost Advisory 1, NWS Marquette, MI

May 30, 20158 counties in Michigan

NWS Marquette, MI issued this frost advisory at May 30, 2015, 4:27 AM EDT for 8 counties in Michigan. It took effect at May 31, 2015, 12:00 AM EDT. It was in force for 8 hr.

The area

The counties it named.

The facts

Issued
May 30, 2015, 4:27 AM EDT (08:27 UTC)
In effect from
May 31, 2015, 12:00 AM EDT
Expired
May 31, 2015, 8:00 AM EDT
In force
8 hr
Issued by
NWS Marquette, MI

Counties Alger County, MI, Baraga County, MI, Delta County, MI, Dickinson County, MI, Houghton County, MI, Keweenaw County, MI, Marquette County, MI, Menominee County, MI

The radar

The Marquette radar (KMQT), 16 km from the middle of the area, began a volume at 08:30 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 00:00Z, 8.5 hours before the alert went out and 219 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-pSkew-T log-p diagram, Green Bay/Straub, WI at 00:00Z on 2015-05-30Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 196 joules per kilogram.LCLLFCEL10008507005003002001001 km2 km3 km6 km9 km-30°-20°-10°0°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Green Bay/Straub, WI at 00:00Z on 2015-05-30The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 26 square meters per square second.19395878Sfc1 km3 km6 km9 kmRMLM
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
196 J/kg
Mixed-layer CIN
-43 J/kg
Mixed-layer LCL
997 m above ground
0-6 km bulk shear
29 kt
0-1 km storm-relative helicity
26 m²/s²
0-3 km storm-relative helicity
34 m²/s²
Significant tornado parameter
0.0
Supercell composite
1.2

Open this sounding in Storm Lab

The office that day

Everything else NWS Marquette, MI issued on the same UTC day.

IssuedProductOfficeCountiesLasted
May 29, 8:49 PM EDTMarine Dense Fog AdvisoryMQT8 hr
May 30, 4:27 AM EDTFreeze WarningMQTBaraga, Dickinson, Gogebic, Houghton, Iron, Marquette and 1 more28 hr

Nearby

Frost Advisories in Michigan, 2015Every frost advisory in 2015

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.