A quick look this morning at two approaching storms. For both, what you see will depend on where you are. Here is the discussion from Sterling this morning. First, on today's rain/sleet event, such as it is ...  We've had no measurable precip here on the Weatherdeck in Cockeysville. It's barely wet the pavement. But, temperatures have fallen all night. It's now just 34 degrees.

For the northern tier of suburban counties, from west to east north of Baltimore's latitude:

"TEMPERATURES CONTINUE TO SLOWLY FALL TO NEAR FREEZING ACROSS THE WINTER STORM
AREA. EXPECT THAT BY THE TIME PRECIPITATION MAKES IT TO THE
REGION...TEMPERATURES WILL BE BELOW FREEZING. PRECIPITATION SHOULD
BEGIN AS A MIX OF SLEET AND FREEZING RAIN...THEN TURN TO MOSTLY
FREEZING RAIN. THE TIMING OF THE ADVISORY MAY BE TOO LONG EVEN
ACROSS THE FAR NORTHERN COUNTIES. EXPECT TEMPERATURES TO MAKE IT UP
INTO THE MID TO EVEN UPPER 30S LATE TODAY...SO FREEZING RAIN THREAT
WOULD DIMINISH TOWARDS THE END OF THE FIRST PERIOD AND LEAVE FOR
RAIN MIXING WITH SLEET. EITHER WAY...A MESSY MORNING AND PROBABLY
AFTERNOON COMMUTE."

Everybody else can expect rain.

And now, here's the chatter on the bigger weekend storm. The unknown here, as so often happens, is where the rain/snow line will form:

"PRECIPITATION WILL BE FIRST TO FORM IN OUR SOUTHWEST CWA (FORECAST AREA, INCLUDING NORTHERN VIRGINIA AND MARYLAND WEST OF THE BAY AND EAST OF GARRETT) )DURING THE MORNING...THEN WILL SPREAD NORTH AND EAST DURING THE AFTERNOON AND EVENING. GFS (COMPUTER MODEL) INDICATES THE ATMOSPHERE WOULD BE COLD ENOUGH FOR WINTRY PRECIPITATION...NAMELY SNOW/SLEET...AT THE ONSET OF PRECIPITATION
ACROSS THE ENTIRE CWA. GFS THEN TRANSITIONS TO MIXED PRECIPITATION
BACK TOWARD THE BLUE RIDGE...WITH A CHANGE TO RAIN AROUND LOWER
SOUTHERN MARYLAND. THERE IS SOME SUPPORT IN THIS TRANSITION FROM THE
SHORT RANGE (COMPUTER) ENSEMBLES...BUT ENSEMBLE GUIDANCE DOES NOT HAVE THE
RAIN/SNOW LINE TILTING QUITE AS FAR BACK AS THE 00Z GFS.

"AS IS COMMON ACROSS OUR CWA...THE RAIN/SNOW LINE WILL SET UP ACROSS
THE CWA...BUT EXACTLY WHERE IT SETS UP AND/OR HOW IT MOVES DURING
THE STORM IS YET TO BE DETERMINED. THIS WILL WILL DICTATE WHO GETS
HOW MUCH OF WHAT PRECIPITATION TYPE. REGARDLESS...QPF (MOISTURE CONTENT OF THE STORM) IS FORECAST TO
BE BOUNTIFUL WITH THIS STORM. IN ADDITION...AT LEAST A PORTION OF
OUR CWA WILL RECEIVE WINTRY PRECIPITATION. THEREFORE...THIS STORM
HAS THE POTENTIAL TO BE A HIGH IMPACT EVENT ACROSS THE CWA.

"THE MOST LIKELY SCENARIO ... IS FOR SNOW (OR SNOW/SLEET) AT THE ONSET...THEN FOR AREAS WEST OF THE BLUE RIDGE TO REMAIN MOSTLY SNOW FOR THE DURATION WHILE
OTHER PLACES EXPERIENCE A MESSY WINTRY MIX THAT WOULD INCLUDE
FREEZING RAIN. THE BEST CHANCE OF A TOTAL CHANGEOVER TO RAIN WOULD
OCCUR ACROSS LOWER SOUTHERN MARYLAND AND THE MID BAY. AS THE STORM
RE-DEVELOPS OF THE MID ATLANTIC COAST...MIXED PRECIPITATION WOULD
LIKELY TRANSITION BACK TO SNOW TOWARD THE END OF THE EVENT SUNDAY
MORNING."