Luftfeuchtigkeit Posted February 7, 2013 Share Posted February 7, 2013 Measured 1.1" at 1:15pm. Liquid equiv. .23". 5:1 ratio!! Must have been some melting, or something....definitely is really wet snow though. Temp at my house still showing 35 degrees 6 SW of the Capitol. Snow depth 7". Link to comment Share on other sites More sharing options...
A-L-E-K Posted February 7, 2013 Share Posted February 7, 2013 SUMMARY...PRECIPITATION WILL CONTINUE TO TRANSITION TO SNOW FROM N TO S THROUGH THE AFTERNOON. SNOW RATES OF 1 IN/HR WILL BE LIKELY...IMPACTING METRO CHICAGO...ROCKFORD...AND MILWAUKEE. DISCUSSION...REGIONAL MOSAIC RADAR IMAGERY DEPICTS A BROAD SHIELD OF PRECIPITATION FROM THE MID-MS VALLEY TO SWRN LOWER MI. THIS ACTIVITY LIES WITHIN THE WARM ADVECTION REGIME LEADING AN APPROACHING SHORTWAVE TROUGH. THE BACK EDGE OF THIS ACTIVITY THAT ARCS FROM SWRN WI INTO S-CNTRL IA ALIGNS WITH AN 850-MB DEFORMATION ZONE WNW OF A NRN-IL LOW-LEVEL CYCLONE. AS THE CYCLONE GRADUALLY TRACKS ENEWD DURING THE NEXT SEVERAL HOURS...AND FORCING FOR ASCENT PERSISTS WHILE BEING AUGMENTED BY STRENGTHENING FRONTOGENETIC CIRCULATIONS...PRECIPITATION WILL LIKELY CONTINUE INTO THE EVENING HOURS. WHERE PRECIPITATION IS CURRENTLY FALLING AS RAIN -- I.E. CNTRL/SRN PARTS OF THE MCD AREA -- SOUNDINGS FROM AMDAR FOR APPROACHES TO/FROM CHICAGO-OHARE/MIDWAY/MILWAUKEE AIRPORTS SUGGEST THAT IT WILL TAKE LITTLE ADDITIONAL COOLING ALOFT FOR SNOW TO BECOME THE PREDOMINANT PRECIPITATION TYPE. IN THESE AREAS...SHALLOW...1-2C WARM LAYERS ARE NOTED BELOW THE 850-MB LEVEL. ADIABATIC COOLING ASSOCIATED WITH FORCED ASCENT ACCOMPANYING THE FRONTOGENETIC RESPONSE SHOULD ALLOW FOR WET-BULB-ZERO HEIGHTS TO BECOME SUFFICIENTLY LOW FOR SNOW TO BECOME THE PREDOMINANT PRECIP TYPE FROM N TO S ACROSS THE MCD AREA. SPECIFICALLY...SFC OBSERVATIONS AND REPORTS FROM THE NSSL PRECIPITATION IDENTIFICATION NEAR THE GROUND /PING/ PROJECT SUGGEST THAT MODERATE TO HEAVY SNOW IS ONGOING ALONG AND N OF A ROCK COUNTY WI TO LAKE COUNTY IL LINE. BY 22Z...SNOW IS FORECAST TO BE THE PREDOMINANT PRECIP TYPE ALONG AND N OF A LINE FROM DOWNTOWN CHICAGO TO ROCKFORD. BY 00Z...THE RAIN/SNOW LINE SHOULD EXTEND FROM E OF STERLING IL TO THE S SUBURBS OF CHICAGO. GIVEN THE MAGNITUDE OF THE AFOREMENTIONED ASCENT OVERLAPPING WITH THE NNEWD-EXTENSION OF A 0.5-0.7-INCH PW PLUME PER GPS DATA...AND A DEEP ISOTHERMAL LAYER AROUND/JUST BELOW 0C AOB THE 725-MB LEVEL PER SOUNDINGS -- AMDAR AND FORECAST -- HEAVY SNOW FROM EFFICIENT AGGREGATION PROCESSES WILL BE LIKELY FOLLOWING THE RAIN-TO-SNOW TRANSITION. SNOW RATES OF 1 IN/HR ARE ANTICIPATED...AS PER COORDINATION WITH THE ROMEOVILLE IL AND MILWAUKEE/SULLIVAN WI WFO/S...WITH IMPACTS ANTICIPATED ACROSS METRO CHICAGO...ROCKFORD...AND MILWAUKEE. Link to comment Share on other sites More sharing options...
daddylonglegs Posted February 7, 2013 Share Posted February 7, 2013 Started snowing here about 10 minutes ago... Link to comment Share on other sites More sharing options...
sc2man13 Posted February 7, 2013 Share Posted February 7, 2013 Walked between classes at 2:25 (35 minutes ago) and there were some pingers mixed in with the snow. Not much, but a few. We're really not too far from the edge of the precip shield and it looks like a few temporary areas of mixing have popped up. I bet they go away when stronger bands move through. I'd guess we have 2.5 inches. Link to comment Share on other sites More sharing options...
Geos Posted February 7, 2013 Share Posted February 7, 2013 Got an area of 35dbz+ from from McHenry to Kenosha sitting overhead. Just heard from a friend in Zion that a Comed truck slide into a shallow retention pond. Luckily there wasn't much water in it! Here's I-290 and Higgins Rd. Link to comment Share on other sites More sharing options...
huronicane Posted February 7, 2013 Share Posted February 7, 2013 Very wet and large snowflakes accumulating on everything now. (null) Link to comment Share on other sites More sharing options...
Brewers Posted February 7, 2013 Share Posted February 7, 2013 RAC has had 0.19" of liquid the past 2 hrs and ENW has had 0.22" both are still reporting +SN. Link to comment Share on other sites More sharing options...
Chicago Storm Posted February 7, 2013 Share Posted February 7, 2013 surprised there are no pingers in streamwood. Looks like hyde park pinger report might not have been bunkRiding the edge. Link to comment Share on other sites More sharing options...
A-L-E-K Posted February 7, 2013 Share Posted February 7, 2013 Riding the edge. still just plain rain? Link to comment Share on other sites More sharing options...
Chicago Storm Posted February 7, 2013 Share Posted February 7, 2013 Riding the edge. still just plain rain? Yea, still RA. Link to comment Share on other sites More sharing options...
frostfern Posted February 7, 2013 Share Posted February 7, 2013 Some very heavy snow just on my doorstep now. Link to comment Share on other sites More sharing options...
A-L-E-K Posted February 7, 2013 Share Posted February 7, 2013 lol ^ webcams showing moderate/heavy snow in buffalo grove, algonquin, crystal lake Link to comment Share on other sites More sharing options...
snowstormcanuck Posted February 7, 2013 Share Posted February 7, 2013 I've noticed the models continue to slow the exit of the snow tomorrow afternoon here. It almost looks like the northern stream snow melds into the defo zone of the coast and pivots a bit. In fact 18z NAM kinda has a trowal signature. I'm wondering if a foot plus is more likely than not. Link to comment Share on other sites More sharing options...
snowstormcanuck Posted February 7, 2013 Share Posted February 7, 2013 Great pics Geos! Link to comment Share on other sites More sharing options...
WestMichigan Posted February 7, 2013 Share Posted February 7, 2013 Rain/snow line is just north of me. I drove 4 miles north and it was all snow. Came back home and it was rain again. Still have picked up nearly 4" before the changeover. Looking forward to the change back this evening. Link to comment Share on other sites More sharing options...
frostfern Posted February 7, 2013 Share Posted February 7, 2013 Looks like there's some sleet mixing in at the airport now. Still all snow IMBY. Link to comment Share on other sites More sharing options...
SchaumburgStormer Posted February 7, 2013 Share Posted February 7, 2013 Not the best photo, but it is coming down at a good clip. Link to comment Share on other sites More sharing options...
YHM Supercell Posted February 7, 2013 Share Posted February 7, 2013 I've noticed the models continue to slow the exit of the snow tomorrow afternoon here. It almost looks like the northern stream snow melds into the defo zone of the coast and pivots a bit. In fact 18z NAM kinda has a trowal signature. I'm wondering if a foot plus is more likely than not. I'm also curious about the type of lake enhancement possible when winds shift NE tomorrow. Could add a few cm's to the totals. No doubt much of the GTA will be basically shut down tomorrow. Link to comment Share on other sites More sharing options...
Luftfeuchtigkeit Posted February 7, 2013 Share Posted February 7, 2013 Snow's accumulating better now, 1/2" in the last hour. 1.6" total. Link to comment Share on other sites More sharing options...
A-L-E-K Posted February 7, 2013 Share Posted February 7, 2013 sounds like a couple pingers on the office window...going to head back up to the northside soon. Link to comment Share on other sites More sharing options...
toronto blizzard Posted February 7, 2013 Share Posted February 7, 2013 I've noticed the models continue to slow the exit of the snow tomorrow afternoon here. It almost looks like the northern stream snow melds into the defo zone of the coast and pivots a bit. In fact 18z NAM kinda has a trowal signature. I'm wondering if a foot plus is more likely than not. Pouring snow here at finch don mills area Link to comment Share on other sites More sharing options...
harrisale Posted February 7, 2013 Share Posted February 7, 2013 Surprised to see Hamilton under a winter storm warning and not Toronto. Wonder what made them decide that. They may think the main defo band will stay more south or they suspect lake enhancement will be strongest at the western tip of the lake. Toronto may get its a storm warning though with the 330 update. Link to comment Share on other sites More sharing options...
SchaumburgStormer Posted February 7, 2013 Share Posted February 7, 2013 sounds like a couple pingers on the office window...going to head back up to the northside soon. With the radar downstream, I think 2-4" should be easily attainable. Prolly more on the northside if the changeover occurs soon. Link to comment Share on other sites More sharing options...
Chicago Storm Posted February 7, 2013 Share Posted February 7, 2013 Just flipped to +SN here. Link to comment Share on other sites More sharing options...
A-L-E-K Posted February 7, 2013 Share Posted February 7, 2013 With the radar downstream, I think 2-4" should be easily attainable. Prolly more on the northside if the changeover occurs soon. yeah my apartment is closer to evanston than it is the loop so, i'm pulling for 4" but that's probably bullish. Link to comment Share on other sites More sharing options...
A-L-E-K Posted February 7, 2013 Share Posted February 7, 2013 Just flipped to +SN here. I was about to troll you...firmly on the north side of that CC boundary Link to comment Share on other sites More sharing options...
kevlon62 Posted February 7, 2013 Share Posted February 7, 2013 Raining in Elmhurst. Leaving now for home. Rock n' roll baby. Link to comment Share on other sites More sharing options...
Brewers Posted February 7, 2013 Share Posted February 7, 2013 PRELIMINARY LOCAL STORM REPORT NATIONAL WEATHER SERVICE CHICAGO/ROMEOVILLE IL 228 PM CST THU FEB 07 2013 .TIME... ...EVENT... ...CITY LOCATION... ...LAT.LON .DATE... ....MAG.... ..COUNTY LOCATION..ST.. ...SOURCE. ..REMARKS.. 0220 PM HEAVY SNOW SPRING GROVE 42.44N 88.24W 02/07/2013 E4.0 INCH MCHENRY IL PUBLIC SNOW TOTAL SO FAR. Link to comment Share on other sites More sharing options...
snowstormcanuck Posted February 7, 2013 Share Posted February 7, 2013 Pouring snow here at finch don mills area Looks like you're getting a little f-gen band up there. Just -SN here but now the roads are starting to get coated. Link to comment Share on other sites More sharing options...
SchaumburgStormer Posted February 7, 2013 Share Posted February 7, 2013 +SN right now. huge 1 to 1.5" diameter snow clumps are pouring down. Link to comment Share on other sites More sharing options...
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