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April 20-21 late season snow potential


Hoosier
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18 hours ago, IWXwx said:

3"-5" is the official criteria for a snow advisory at IND.  However, an advisory is something that is flexible, unlike a warning. It is more at the discretion of the forecaster based on impacts. For example, a 2" snow in November might warrant an advisory, based on being the first possibility of slick roads for the season. In this case, even if 3" falls, they may take into consideration warm pavement temps and not expecting hazardous road conditions to not issue an advisory.

Guys, save your breath. I already responded to him earlier and he blew me off. Might have something to do with relocating from the south to IND. The laughable thing to me is that sometime in the future, ALL advisories are going away.

7 hours ago, Chicago Storm said:


Record and historic has nothing to do with headlines.

There is criteria for a reason.


.

 

7 hours ago, donsutherland1 said:

IND’s advisory criteria can be found here:

https://www.weather.gov/ind/criteria

Although 3”-5” is the threshold, there is an optional 2”-4” threshold. So, it was an event for which the NWS could have gone either way.

 

6 hours ago, RCNYILWX said:

If there were noteworthy road impacts, the case would be more defensible. Any snow higher than a trace today would technically be historic, no? The record for the date was T so if it merely set the new record at 0.1", that warrants an advisory?    

 

 

From the IND Evening Update AFD:

"Road impacts appear to be minimal at this time, with the majority of the accumulations occurring on grassy areas."

 

There's really no need for further debate on it, with no real travel impacts, advisories are typically not issued. Certainly some gray area and the product has been more commonly issued for sub-advisory criteria impact-based reasons in recent years, but this event doesn't hit that bar in the Indy area, regardless of the historic nature of the snowfall.

 

 

 

 

 

 

 

 

 

 

6 hours ago, Hoosier said:

It takes a lot for snow to impact the roads at this time of year.  If you're thinking that the roads will just be wet and thus you don't issue an advisory before the event, then you better be hyper vigilant and be ready to adjust quickly if the situation changes.  We saw one of these go the other way in Illinois on 4/14/2019.  No advisory ahead of time, the roads went to shit and there was a late pull of the trigger. 

 

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NWS Pittsburgh tweeted that they measured 1.6” officially before the band of snow moved out.

Edit: final total for the day was 1.8”.

Top snowfalls on or after 4/21 for PIT:  
1. 5/9/1966 (3.1”)
T-2. 4/28/1928 & 4/21/1922 (3.0”)
T-4. 5/1/1963 & 4/21/2021 (1.8”) 

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17 minutes ago, buckeye said:

Like most others here in Ohio, looks like we got between 3 and 4 inches.   Somewhat of a bust for local wx guys who called for .5-1"

 

Don't worry, the good folks at the airport made sure to only measure 1", the lowest total in all of Central Ohio- as is tradition.

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Finished with 4.4" here. Detroit got 3.5". Detroits southeast suburbs to the Ohio border got 3-6" with much less to the north.

 

The 3.3" at Detroit on 4-20 was a record for the date. This was the 4th heaviest snowstorm on record this late in the season, and just the 9th time in 140 years that a 1"+ snowfall occurred on or after April 20th.

 

The scenery this morning was absolutely amazing. Thick snow on blossoms was unlike anything I'd ever seen before.

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1 minute ago, michsnowfreak said:

Finished with 4.4" here. Detroit got 3.5". Detroits southeast suburbs to the Ohio border got 3-6" with much less to the north.

 

The 3.3" at Detroit on 4-20 was a record for the date. This was the 4th heaviest snowstorm on record this late in the season, and just the 9th time in 140 years that a 1"+ snowfall occurred on or after April 20th.

 

The scenery this morning was absolutely amazing. Thick snow on blossoms was unlike anything I'd ever seen before.

Dusting here 

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