JAMSTEC Issues their Seasonal Outlook based on April 1, 2022 Model Runs

April 17, 2022Posted inweatherNo Comments

Usually, I compare the JAMSTEC forecast with the NOAA forecast after NOAA Issues its Seasonal Outlook. But this month, JAMSTEC was very early so I thought I would share it with everyone now. NOAA calls their predictions an outlook but JAMSTEC calls their predictions a forecast. You need a scorecard. I am going to show their forecasts by month and by season and some of the indices they use in their model. They make world forecasts and for any readers who do not realize it, the U.S. is part of the world so it is covered by a world forecast. Of the season that includes our monsoon, I will extract and enlarge their forecast for North America.

I like the JAMSTEC forecast because the U.S. is part of the world and our weather is not independent of the worldwide weather pattern. In fact, most of U.S. weather originates in the Pacific Ocean and the Pacific Ocean is where Japan is located. In fact, Japan and the US jointly manage the monitoring system along the Equator that helps predict the phases of ENSO. So one of the reasons I include worldwide forecasts in articles is to encourage the understanding of worldwide weather patterns. It is not that the U.S. does not cooperate with other nations with respect to weather forecasts as it does. But to view weather forecasts on the Internet or TV you would not easily notice that.

NOAA Updates Their ENSO Forecast – La Nina Looks to Continue

April 15, 2022Posted inweatherNo Comments

This may read like a repeat of a prior article but it is not. It is simply that the situation has not really changed. On the second Thursday of every month, NOAA issues its analysis of the status of ENSO. This includes determining the Alert System Status. Although the current status remains the same i.e.  La Nina Advisory, the forecast has been adjusted somewhat from last month. The forecast calls for the La Nina to continue.  The timing is shown in the NOAA discussion and the IRI probability analysis. Of importance, the chances of a Triple Dip La Nina are not at all ruled out. That could be a real disaster for the Southwest and the West Coast.

The impact of the NOAA forecast for the slow or non-existent transition from La Nina to ENSO Neutral will show up next Thursday when NOAA issues its Seasonal Outlook. The NOAA ENSO Status Update provides an advance indication of how the Outlook might change. There is a lag between the ENSO state and the impact on U.S. weather.  Thus the exact date when La Nina meets the criteria for ENSO Neutral may not be very important in terms of the actual impact on Spring and Summer weather including the North American Monsoon (NAM).  We may see some changes farther out in the NOAA Outlook that will be issued next Thursday in particular Fall and Winter. But the possibility of a Triple Dip should be of considerable concern but it most likely will not be reflected in the Outlook issued next Thursday since it remains unlikely but possible. We will learn more about what NOAA thinks next Thursday.

UN climate report: It’s ‘now or never’ to limit global warming to 1.5C degrees

April 11, 2022Posted inClimateNo Comments

On April 4, 2022, the IPPC AR6 WGIII Report was released to the public.  In this article, I will try to summarize what was presented.  This is complicated by the sensational nature of the analysis presented about the rate of change in global temperature.  The analysis conclusion was interpreted by the UN Secretary-General as a dramatic proclamation of the dire need for corrective action.

Southwest Drought Briefing – A Focus on Snowpack: April 5, 2022

April 9, 2022Posted inweatherNo Comments

NIDIS (National Integrated Drought Information System) hosted a Drought Briefing on the Southwest on April 5, 2022. In this article, we provide the recording of the webinar.  There are three amazing presentations which include some new ways to make run-off forecasts. I am sure you will find it very interesting. In some cases, the results are surprising. These are very good presenters and provide a lot of information. It is not a good situation but not as bad as one might expect given the continuation of the La Nina.

NOAA Updates April, 2022 Outlook

April 1, 2022Posted inweatherNo Comments

Updated at 6 pm EST on April 1, 2022 to reflect the issuance of the Week 3 – 4 Outlook that I think suggests that the Northern Tier of CONUS will be wetter than shown in the Outlook for April Issued yesterday.

At the end of every month, NOAA updates their Early Outlook for the following month which in this case is April. They also issue a drought outlook for the following month. We are reporting on that tonight. The updated Outlook is somewhat different from the Early Outlook which NOAA now calls the Mid-Month Outlook. It is overall less warm and less dry than the Mid-Month Outlook.  We provide partial-month outlooks for the first 22 days of April which will be 28 days when the Week 3 – 4 Update is issued on Friday.  We also provide enough information for readers to understand any changes from the Mid-Month Outlook and we try to figure out why these changes were made.  Most of the changes are explained in the NOAA discussion which is included in the article. When the Week 3 – 4 Outlook is released, we will provide an update to this article if it is needed.

Three-Peat or Triple-Dip is not a Cause for Celebration

March 26, 2022Posted inClimateNo Comments

We have discussed this before but the fact that there is a possibility of a third La Nina Winter is a good reason to discuss it again. I would say that is is not real likely. But if it happens, it would be very serious. So that is why it is worth discussing. We have not previously discussed how Global Warming makes any drought more dangerous but that should be obvious. We know that the negative phase of the Pacific Decadal Oscillation (PDO) results in a higher ratio of La Nina to El Nino Events. But we have not discussed how Global Warming might impact the PDO. So we are not addressing the broader question of whether or not Global Warming is increasing the chance of a third year of La Nina but simply looking at the evidence that a third year is a possibility. It seems that NOAA may be more concerned about the possibility than some other weather forecasting agencies in other part of the world, but we will attempt to show that their concern is not unreasonable.

NOAA Updates their Four-Season Outlook on March 17, 2022

March 18, 2022Posted inweatherNo Comments

Introduction

Today is the third Thursday of the month so right on schedule NOAA has issued their Seasonal Outlook. In this article, I summarize it and provide links that will take the reader to additional maps and discussions that I have not included, but I have included quite a bit in this article. I want to remind everyone that last Thursday NOAA issued their ENSO outlook and that has a lot of influence on their Seasonal Outlook.  The Seasonal Outlook generally reflects La Nina conditions initially with no clear indication of when this La Nina will end. There could be triple dip La Nina but that is not the most likely scenario but can not be discounted. Over the next three months, the Southern Tier drought intensifies but there is relief extending to the east. There is fairly good news with respect to the North American Monsoon (NAM).

Assessing the U.S. Climate in February, 2022

March 16, 2022Posted inClimate, weatherNo Comments

Updated at 0:15 AM EDT March 17, 2022 to include information on worldwide precipitation and the corresponding discussion.

Recently I published a podcast about February climate prepared by two meteorologists who work at CLIMAS. It focuses on why February was the way it was for the U.S. Southwest and West Coast.

This is the official NCEI assessment of the U.S. Climate in February, 2022. it describes what it was not why it was. Sometimes I use an email that a PR person sends out on that report. This time I am working with the report itself. Plus there was some supplementary information provided and I am including some of that as well. The report is pretty complete so I only added a few comments to it. The main comment is that the last decade has been the warmest ever in modern times but that can be confusing if you say that this is the fifth warmest year ever (just an example). That could mean it is average for the last ten years. Although this article is mostly about CONUS plus Alaska, I have included the World temperature record for the last 128 Februaries.

Mar 2022 Southwest Climate Podcast – Cold(ish), Windy, and Dry – Winter Recap & Looking Ahead

March 14, 2022Posted inClimate, weatherNo Comments

In the March 2022 edition of the CLIMAS Southwest Climate Podcast, Mike Crimmins and Zack Guido “dive into a recap of winter (so far) in the Southwest. First, recap winter to date, and put it in the context of a double-dip La Niña, including precipitation totals, temperature, and snowpack. Then they take a closer look at the phases of the PNA (Pacific/North American pattern) and how this links to ENSO/La Niña and the weather conditions this winter. Finally, they revisit temperature to consider just how “cold” it has actually been, and preview a closer look at fire outlooks, snowpack, and water supply in upcoming podcasts”.

ENSO Update March 10, 2022: La Nina Remains and if Anything is Stronger

March 12, 2022Posted inweatherNo Comments

On the second Thursday of every month, NOAA issues its analysis of the status of ENSO. This includes determining the Alert System Status. Although the current status remains the same i.e.  La Nina Advisory, the forecast has been adjusted somewhat from last month. The forecast calls for the La Nina to continue to fade perhaps but right now it is stronger.  The timing is shown in the NOAA discussion and the IRI probability analysis. Of importance, the chances of a Triple Dip La Nina are not ruled out. That could be a real disaster for the Southwest and the West Coast.

The impact of the NOAA forecast for the transition from La Nina to ENSO Neutral will show up next Thursday when NOAA issues its Seasonal Outlook. The NOAA ENSO Status Update provides an advance indication of how the forecast might change. There is a lag between the ENSO state and the impact on U.S. weather.  Thus the exact date when a fading La Nina meets the criteria for ENSO Neutral may not be very important in terms of the actual impact on Spring and Summer weather including the North American Monsoon (NAM).  But the possibility of a Triple Dip should be of considerable concern. We will learn what NOAA thinks next Thursday.