(UPDATED) MN BLIZZARD: 13.6 Inches in Fridley and Still Snowing

Update (10:15 p.m.): Fridley has seen 13.6 inches of snow in the current storm, according to National Weather Service trained weather spotters. The measurements were taken at 10 p.m. Sunday just east of Central Avenue NE and just north and south of I-694. Two other nearby observers got an inch less at 10 p.m. and at 6 p.m., but the snow was still falling.

Update (5:45 p.m. Sunday): How deep could the snow get? On WCCO-AM at 5:15 p.m., staff meteorologist Mike Lynch said he wouldn't be surprised to see as much as 18 inches in parts of the Twin Cities. At 5:45 p.m., he said snow continued to fall in Anoka County at a rate of one to two inches per hour, with snow expected to continue to fall through 10 p.m. Sunday. It could be the biggest Twin Cities snowstorm since the December 2010 blizzard that collapsed the Metrodome roof in downtown Minneapolis.

Original post (3:45 p.m.): The first big Minnesota snowstorm of the season has exceeded expectations, with more than 10 inches of snow measured before 4 p.m.

The National Weather Service reported that a trained spotter measured 10.1 inches of snow in Anoka at 3:37 p.m. Sunday.

ABC News meteorologist tweeted a report of the same amout, 10.1 inches, in Fridley at 2:54 p.m. Sunday.

At 12:30 p.m. Sunday, KARE11 meteorologist Jerrid Sebasta tweeted a report of 8.4 inches in Fridley and looked ahead to as much as 12 inches in the north metro.

At the airport in Blaine, visibility was measured at one-quarter mile on Sunday afternoon.

See more ruler photos and tweets in the Storify above by using the scroll bar on the right side of the photo. (If you don't see the image, check out Storify.com.)

Related:

• Tweeting Teens Predict No Snow Day at Fridley-Area Schools on Monday
• MnDOT: Snowstorm Making Twin Cities Roads 'Difficult'
• YOUR SNOW PHOTO: Share It with Fridley Here
• UPDATED: Blizzard? Fridley's First Real MN Winter Storm of the Season

Also:

• Enter Patch “Deck the House” Contest
• Pin the Best Holiday Lights in Fridley