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Spring 2024 Discussion


SnowloverSid

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Someone on the winter forum was wondering when someone was going to start the spring discussion, so I decided to bite the bullet and begin the spring discussion, covering March 1 to May 31. A sure sign of spring is when posters begin to deplore the sun angle when discussing late- season snowstorms.

Today is Ash Wednesday, which falls on Valentine’s Day for the second time since 2018. When I was young, it signaled to me that we were no longer in midwinter but late winter. It is the beginning of Lent, the 40 days (not counting Sundays) before Easter. My Lent diet— or I should say, my attempt at one, has just begun.

May it be a fun spring of exciting weather, notably thunderstorms with adrenaline- inducing thunderstorms!

 

 

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3 hours ago, George Acton said:

Time to rev up severe weather. NOAA likes it!!

Screenshot_20240218_193343_Chrome.jpg

I'm surprised they went equal chances for Southern California. I've got a small lull for them for the end of the month into March, but then the train continues from my line of thinking. Maybe it's because March is 3.14 inches, but I truly think they get there and even beat their .83 April average before the hose shuts off. If you're keeping count, LA has had 8.72 inches of rain so far this month. Further east, not too much to say. Spring is coming early. I realize there are some still holding out hope for mid-march, but I'm not buying the Alaska high that the CFS keeps churning out. We've had it for a week or so and that could happen, but it will be quickly displaced. 

 

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Multi-day outbreak appears possible 

Day 4-8 Convective Outlook  
   NWS Storm Prediction Center Norman OK
   0333 AM CST Thu Feb 22 2024

   Valid 251200Z - 011200Z

   ...DISCUSSION...
   Medium-range models continue to show a powerful mid- to upper-level
   trough ejecting into the central U.S. by late Tuesday into
   Wednesday.  A deep cyclone is currently progged by most ensemble
   members to move from the central Great Plains into the Great Lakes
   vicinity.  Preceding this upper trough, an antecedent re-charging of
   steep lapse rates associated with an elevated mixed layer over the
   southern High Plains is forecast.  A few days of airmass
   modification, both in terms of ambient temperature and moistening
   over the Gulf Basin, will occur in wake of frontal passage on
   Saturday.  Northward moisture return beneath the aforementioned EML
   will probably result in a substantial warm sector by late afternoon
   Tuesday and into Wednesday farther east.  Model run-to-run
   continuity is such that there is increased confidence in the
   introduction of 15-percent severe-risk highlights with the expected
   eastward progression of the trough.  Will defer the possibility of
   an additional area farther east on Thursday until confidence in
   details related to earlier days becomes more focused.

   ..Smith.. 02/22/2024
 

image.png.bb1b8b146424c6d80dee81ce74d79203.png

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Edited by StormfanaticInd
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From INDY

Tuesday and Wednesday...

 

After two days or warmer and more moist air arriving on southerly

winds, The models start to hint at two stronger forcing waves

passing across Central Indiana on Tuesday and Wednesday. The Tuesday

system appears to be a bit weaker, while the Wednesday system is

much more robust, associated with a moderate upper trough and a

sharp surface cold front. Thunderstorms may be present as these

waves pass as Central Indiana will be in the warm sector. Its very

early, but should the pattern hold, severe thunderstorms would be

possible. For now, will include pops on Tuesday and Wednesday with a

thunderstorm mention.

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12 hours ago, StretchCT said:

Perfect timing...

image.thumb.png.61a40b445595a9e06c1efd40d486f0ce.png

 

This month could be very much like March 1983: very mild to start; then turning cold right after the equinox. That is probably when it will snow. April 1983 still holds the record for monthly snowfall.

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1 hour ago, StretchCT said:

Euro AIFS also showing end of month cold snap

image.thumb.png.0c2af8025bad71191726cfbfd250f301.png

image.thumb.png.e043a106983b5803aafd95af1d71423d.png 

Looking at this setup, the cooler air should last 7-10 days before the pacific floods the continent with mild air again. We actually seem to get a -NAO for a short time if the GFS is right. With what we have seen all year, I imagine it will be displaced relatively quickly. 

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3 hours ago, StretchCT said:

Euro AIFS also showing end of month cold snap

image.thumb.png.0c2af8025bad71191726cfbfd250f301.png

image.thumb.png.e043a106983b5803aafd95af1d71423d.png 

I mean wouldn’t have it any other way warm all winter then cold to delay actual spring weather nothing new the last decade 

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17 hours ago, Hassaywx1223 said:

I mean wouldn’t have it any other way warm all winter then cold to delay actual spring weather nothing new the last decade 

I hear this often repeated, but can't seem to see it in the data. Winter generally runs into April up here, but we are squarely in spring.

Here's the last 10 March rankings. 

 

 

 

cd74.78.85.81.67.3.52.2.prcp.png

cd74.78.85.81.67.3.51.48.prcp.png

cd74.78.85.81.67.3.51.35.prcp.png

cd74.78.85.81.67.3.51.5.prcp.png

cd74.78.85.81.67.3.51.21.prcp.png

cd74.78.85.81.67.3.50.37.prcp.png

cd74.78.85.81.67.3.50.52.prcp.png

cd74.78.85.81.67.3.50.22.prcp.png

cd74.78.85.81.67.3.50.8.prcp.png

cd74.78.85.81.67.3.49.54.prcp.png

cd74.78.85.81.67.3.49.40.prcp.png

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