Possible snow for Virginia, but could it MSTR?

[jimvb]

The forecasts for the Richmond area call for some chance of snow or rain tonight. The forecasts, from TV meteorologists and official NOAA forecasts and model runs, appear to be all over the place on this one. So I looked at the local NOAA discussion and found this:


A QUIK MVG CLIPPER TYPE SYS WL MV FM THE UPR MIDWEST INTO THE OH
VLY LT TUE THROUGH TUE NGT...THEN ACRS THE NRN PART OF MDATLC RGN
DURG WED. MUCH OF FA WL RMN S OF MAIN TRACK (BOTH SFC-ALOFT)...AND
AS USUAL W/ THIS TYPES OF EVENTS...LTL/NO MSTR XPCTD S OF THE
SYSTEMS TRACK. MID/HIER LVLS MSTR WL CONT TO SPRD INTO THE FA FM
THE NW TUE NGT...WHL LLVLS RMNS QUITE DRY. MDL TSXNS CONT W/
SUFFICIENT DRY AIR AOB 5-7KFT THROUGH WED MRNG...SO ANY PCPN WL HV
TOUGH TIME REACHING THE GRND...AS IT ARRIVES. ATTM...ATMOS
COLD/DRY ENUF FOR AT LEAST PSBL FLURRIES FOR NW CTYS OF FA LT TUE
NGT INTO WED MRNG. LLVL WRMG XPCTD DURG WED...WHICH WOULD RESULT
IN ANY PCPN (ACRS NRN TIER OF FA) BEING LIQUID.

LO TEMPS TUE NGT FM THE UPR 20S TO MID/UPR 30S...AND RDGS MAY RISE
A CPL OF DEGS F AFT MDNGT/TWD DAYBREAK AS MSTR FM THE SYS TO OUR
NW APPROACHES. HI TEMPS WED FM THE MID/UPR 40S N...UPR 50S/NR 60
CNTRL AND S.

So some snow is possible. The discussion is somewhat hard to read because practically every word is an abbreviation, but I can decipher most of them. But what is MSTR? This forum created a list of weather terms and I consulted it and did not find it. It looks like "mainstream" but that does not fit the context, which seems to suggest something like a storm or a type of precipitation coming into the area.

[JonathanBelles]

MSTR is moisture I think.

[jimvb]

Sounds reasonable. He is talking about how much moisture this storm can provide.

[brunota2003]

MAY RISE A CPL OF DEGS F AFT MDNGT/TWD DAYBREAK AS MSTR FM THE SYS TO OUR
NW APPROACHES.

"May rise a couple of degrees Farenheight (spelling) after Midnight/Towards daybreak as moisture from the system to our northwest approaches."