Category: AG Report

Morning Ensemble Disco.

*Part of what we send our clients is a daily (two times/ day during active periods) ensemble discussion.  Here’s an excerpt of this morning’s discussion that went out earlier.  By the way, if you’re interested in joining our weather consulting services, please e-mail bill@indywx.com for more details.

…We note some significant differences in our morning ensemble data that’s creating some doubt in terms of the longevity of the coming cold.  We still feel the heart of the cold is in the Mid West and Ohio Valley with this early February surge.  The EC is likely a battle zone, at least initially.

EuroFeb5th

GEFSFeb5thThe European is much more progressive in breaking down the cold across the central and east, while the GFS ensembles look much more realistic to us.  Why?  The GoA trough placement.  The EPS is likely “dragging its heels” across the southwest with the southern energy and in return deepens the trough too much across the four corners region.

We see the GEFS going to a significant cold period in the 10-14 day period, centered over the mid section into the Ohio Valley.  This is also during the time frame we think the first of two winter events impacts the Ohio Valley.

gfs-ens_T2ma5d_us_10We’ll issue an afternoon ensemble discussion after having an opportunity to digest 12z data.  Look for it in your inbox by 6p.

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Overwhelming Evidence On Mid Month Cold…

The step-down cold pattern early January is ongoing, but we’ve been clear with our thinking of even colder air invading around mid month (Jan 10th-20th time period). We wanted to…

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Updated JAMSTEC…

6:51a, 9.16.15 I tried my best to stay up late enough last night to post this update, but decided to finally turn in after nearly two collisions with me falling…

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Monday Morning Weather Rambles…

September is still running much warmer than normal, despite the recent well below average regime. See the temperature anomalies over the past (7) days:    and the month-to-date:      …

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Saturday Morning: A Look Where We’ve Been And Where We’re Going…

August has been cooler and drier than normal month-to-date.  As we’ll get into below, this cooler, dry trend should continue to wrap up the month.

* Click on any image to enlarge.

August temperature departure- month-to-date.

August temperature departure- month-to-date.

August precipitation departure- month-to-date

August precipitation departure- month-to-date2015 to date has been cool central and east:2015 to date has been cool central and east:

2015 to date has been cool central and east:

4The upcoming winter looks fun and challenging.  It’s a volatile look with the strong Nino and warm northern, eastern Pacific (positive PDO).  Certainly can’t “broad brush” the upcoming winter forecast solely based off similar strong Ninos of the past…

10Positive PDO temperature anomalies favor western Canada ridging and troughiness east.  It’s a pattern that favors a cooler than normal regime across the east and southeast.

11As we go into the weekend, sunshine and comfortable conditions today will give way to increasingly cloudy skies Sunday with a threat of a shower or thunderstorm, especially during the afternoon and evening.  A few of these storms could reach strong levels.  The culprit?  Another strong late August cold front.  Most rainfall totals will be around a quarter inch Sunday, but there will be some locally heavier totals with stronger storms.

5Warmer conditions will build in briefly in between the early week cool spell and stronger push of cool inbound Sunday night that will remain with us through the majority of the upcoming work week.

6

7Longer term, we think conditions warm going into next weekend after a very cool, fall-like week, but don’t necessarily agree with the GFS ensemble plot below into early September.

3We expect ridging to build in to close the last couple days of August.

9However, recurving Typhoon Atsani argues for a return of cooler air (briefly) and an associated trough arriving between September 2nd and 4th…

8Images credited to the following:

  • weatherbell.com
  • http://www.usno.navy.mil/JTWC/
  • http://mrcc.isws.illinois.edu/cliwatch/watch.htm#seasonMaps

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