Alert archive / Maine / Mesoscale Discussions in 2019

Mesoscale Discussion 2

January 1, 2019Aroostook County, Piscataquis County, Maine

The Storm Prediction Center issued this mesoscale discussion at Jan 1, 2019, 4:07 AM EST for Aroostook County, Piscataquis County, Maine. It was in force for 6 hr.

The area

The outline as issued.

The facts

Issued
Jan 1, 2019, 4:07 AM EST (09:07 UTC)
Expired
Jan 1, 2019, 10:00 AM EST
In force
6 hr
Issued by
the Storm Prediction Center

Counties Aroostook County, ME, Piscataquis County, ME

The radar

The Caribou radar (KCBW), 113 km from the middle of the area, began a volume at 09:10 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

Gray, ME (KGYX), launched 00:00Z, 9.1 hours before the alert went out and 319 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, Gray, ME at 00:00Z on 2019-01-01Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 0 joules per kilogram.LCL10008507005003002001001 km2 km3 km6 km9 km12 km15 km-30°-20°-10°0°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Gray, ME at 00:00Z on 2019-01-01The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 244 square meters per square second.1939587897117136Sfc1 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
0 J/kg
Mixed-layer CIN
No buoyant parcel
Mixed-layer LCL
690 m above ground
0-6 km bulk shear
67 kt
0-1 km storm-relative helicity
244 m²/s²
0-3 km storm-relative helicity
315 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.0

Open this sounding in Storm Lab

The text

As transmitted.

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SPC that day

Everything else SPC issued on the same UTC day.

IssuedProductOfficeCountiesLasted
Dec 31, 10:15 PM ESTMesoscale DiscussionSPCAndroscoggin, Cumberland, Franklin, Kennebec, Oxford, Penobscot and 4 more6 hr

Nearby

Mesoscale Discussions in Maine, 2019Every mesoscale discussion in 2019

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.