Alert archive / Maine / Frost Advisories in 2009
Frost Advisory 2, NWS Caribou, ME
NWS Caribou, ME issued this frost advisory at May 18, 2009, 4:47 AM EDT for 4 counties in Maine. It took effect at May 19, 2009, 2:00 AM EDT. It was in force for 3 hr.
The area
The counties it named.
The facts
- Issued
- May 18, 2009, 4:47 AM EDT (08:47 UTC)
- In effect from
- May 19, 2009, 2:00 AM EDT
- Expired
- May 19, 2009, 5:02 AM EDT
- In force
- 3 hr
- Issued by
- NWS Caribou, ME
Counties Hancock County, ME, Penobscot County, ME, Piscataquis County, ME, Washington County, ME
The radar
The Caribou radar (KCBW), 108 km from the middle of the area, began a volume at 08:51 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
Chatham, MA (KCHH), launched 00:00Z, 8.8 hours before the alert went out and 410 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
- 1420 m above ground
- 0-6 km bulk shear
- 47 kt
- 0-1 km storm-relative helicity
- -100 m²/s²
- 0-3 km storm-relative helicity
- -39 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The office that day
Everything else NWS Caribou, ME issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| May 18, 4:47 AM EDT | Freeze Warning | CAR | Aroostook, Penobscot, Piscataquis, Somerset | 24 hr |
Nearby
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.