Alert archive / Maine / Mesoscale Discussions in 2003

Mesoscale Discussion 145

February 23, 20034 counties in Maine

The Storm Prediction Center issued this mesoscale discussion at Feb 23, 2003, 10:07 AM EST for 4 counties in Maine. It was in force for 5 hr.

The area

The outline as issued.

The facts

Issued
Feb 23, 2003, 10:07 AM EST (15:07 UTC)
Expired
Feb 23, 2003, 3:00 PM EST
In force
5 hr
Issued by
the Storm Prediction Center

Counties Aroostook County, ME, Piscataquis County, ME, Somerset County, ME, Washington County, ME

The radar

The Caribou radar (KCBW), 72 km from the middle of the area, began a volume at 15:07 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

Caribou, ME (KCAR), launched 12:00Z, 3.1 hours before the alert went out and 148 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, Caribou, ME at 12:00Z on 2003-02-23Temperature 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, Caribou, ME at 12:00Z on 2003-02-23The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 1030 square meters per square second.1939587897117136156Sfc1 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
603 m above ground
0-6 km bulk shear
91 kt
0-1 km storm-relative helicity
1030 m²/s²
0-3 km storm-relative helicity
1670 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.0

Open this sounding in Storm Lab

The text

As transmitted, in the capitals the NWS used until 2016.

679 
ACUS11 KWNS 231507
SWOMCD
SPC MCD 231507 
MEZ000-232000-

MESOSCALE DISCUSSION 0145
NWS STORM PREDICTION CENTER NORMAN OK
0907 AM CST SUN FEB 23 2003

AREAS AFFECTED...ERN AND NRN ME

CONCERNING...WINTER MIXED PRECIPITATION 

VALID 231507Z - 232000Z

MIXED WINTER PRECIPITATION WILL CONTINUE ACROSS ERN/NRN ME DURING
THE NEXT SEVERAL HOURS BEFORE TAPERING OFF FROM SW-NE. FREEZING
RAIN RATES TO 0.1/HR ARE POSSIBLE SOUTH OF A LINE FROM HUL TO
3B1 DURING THE NEXT 2-4 HRS...WITH OCCASIONAL MODERATE SNOW/SLEET
MIXTURE NORTH OF THIS LINE.



AREA OF PRECIPITATION LIFTING NEWD ACROSS ERN ME IS ASSOCIATED
WITH WARM CONVEYOR BELT...AND IS PRODUCING AREAS OF LIGHT TO
MODERATE FREEZING RAIN FROM AUG NEWD INTO INTERIOR ERN ME AT 14Z.
ABOVE FREEZING ZONE ON 12Z GYX SOUNDING EXTENDS FROM 875MB TO
725MB WITH MAX TEMPERATURE OF +7.7C SUGGESTING FREEZING RAIN.
ADDITIONALLY...WEAK ELEVATED INSTABILITY WITH 50-100 J/KG CAPE IS
SUPPORTIVE OF CONVECTIVE PRECIPITATION WITH ONGOING PRECIPITATION
ACROSS THE DISCUSSION AREA. DRY SLOT WILL MOVE INTO BGR AREA BY
18Z AND LIFT NEWD BRINGING A LULL TO THE PRECIPITATION DURING
MOST OF THE AFTERNOON HOURS. ADDITIONAL AREA OF PRECIPITATION
OVER UPSTATE NY WILL LIFT NEWD INTO NWRN/NRN ME THIS EVENING
BRINING AN ADDITIONAL PERIOD OF MODERATE OR OCCASIONAL HEAVY
SNOW.

..BANACOS.. 02/23/2003

...PLEASE SEE WWW.SPC.NOAA.GOV FOR GRAPHIC PRODUCT...

44186848 44206854 44686913 45727019 46387008 47386928
47226897 47396827 47106783 46116775 45586763 45156730
44766707 44606746 44206848 

46196727 45806843 45167004

Nearby

Mesoscale Discussions in Maine, 2003Every mesoscale discussion in 2003

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.