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Mid to Long Range Discussion ~ 2023


buckeyefan1
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8 hours ago, Brick Tamland said:

Finally feeling like summer next week. And a level 2 severe threat for Monday.

It's been great not having to feel the real summer heat and humidity until almost the first week of July this year. You don't get to say that hardly ever around these parts in the southeast. I can say 2003-2013-2023. 3 out of the last 21 years counting this summer. I'm enjoying it.

 

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spccoday2.categorical.latest.png?v=164
 

 consensus of
   model forecasts suggests the greatest instability will develop from
   central North Carolina into southern and central Virginia, where
   MLCAPE values appear likely to reach the 2000 to 3000 J/kg range. In
   addition to moderate instability, NAM forecast soundings near
   Richmond, Virginia and Raleigh, North Carolina have steep mid-level
   lapse rates with relatively cool temperatures aloft. This, combined
   with 0-6 km shear in the 30 to 35 knot range will likely support
   supercell development. The potential for supercells will be greatest
   early in the afternoon, before storms merge into a line. Hailstones
   of greater than 2 inches in diameter will be possible with
   supercells that develop in areas that destabilize the most. The
   current thinking is that a relatively quick transition to a line
   will occur. This line is forecast to become organized, moving
   eastward across the Piedmont into the Raleigh/Durham and Richmond
   areas during the late afternoon. Wind-damage will be likely along
   the leading edge of the stronger parts of this line segment.
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At GSO, the percentage  of years in which the first 90 degree day falls in each month are as follows:

March:1.7%

April: 18.6%

May: 45.8%

June: 30.5%

July: 3.4% (4 years out of 118)

Funnily enough, 2 out of the 4 years that made it to July were 2017 & 2020, and we haven't had a March or April date since 2006.

It's going to be really close to making it to July, with a forecast high of 89 on Friday.

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While we deal with this ongoing hot pattern...latest ENSO predictions increase chance for moderate to strong El Nino.  97/98 and 15/16 are analogs.  Neither were stellar years in the SE FWIW but it only takes one!

The most recent IRI plume indicates El Niño will persist through the Northern Hemisphere winter 2023-24 [Fig. 6]. Forecasters favor continued growth of El Niño through the fall, peaking this winter with moderate-to-strong intensity (81% chance of November-January Niño-3.4 ≥ 1.0°C). An event that becomes "historically strong" (seasonally averaged Niño-3.4 ≥ 2.0°C), rivaling the winters of 1997-98 or 2015-16, has an approximately 1 in 5 chance. In summary, there is a greater than 90% chance that El Niño will continue through the Northern Hemisphere winter [Fig. 7].

https://www.cpc.ncep.noaa.gov/products/analysis_monitoring/enso_advisory/ensodisc.shtml

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On 7/14/2023 at 3:02 PM, Upstate Tiger said:

While we deal with this ongoing hot pattern...latest ENSO predictions increase chance for moderate to strong El Nino.  97/98 and 15/16 are analogs.  Neither were stellar years in the SE FWIW but it only takes one!

The most recent IRI plume indicates El Niño will persist through the Northern Hemisphere winter 2023-24 [Fig. 6]. Forecasters favor continued growth of El Niño through the fall, peaking this winter with moderate-to-strong intensity (81% chance of November-January Niño-3.4 ≥ 1.0°C). An event that becomes "historically strong" (seasonally averaged Niño-3.4 ≥ 2.0°C), rivaling the winters of 1997-98 or 2015-16, has an approximately 1 in 5 chance. In summary, there is a greater than 90% chance that El Niño will continue through the Northern Hemisphere winter [Fig. 7].

https://www.cpc.ncep.noaa.gov/products/analysis_monitoring/enso_advisory/ensodisc.shtml

Ryan Hall is not really calling for a strong nino this year but it's still early.

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