WSI Seasonal Forecast Archive

Each month WSI releases a seasonal forecast based on the anticipated weather for the next three-month span. Top insurance, risk management companies and financial institutions around the globe trust WSI to deliver easy-to-use, timely and expert weather guidance to help anticipate market volatility, mitigate risk and make critical decisions with confidence. Forecast adjustments are sometimes made as additional data is received; monitor this page frequently for the latest information.

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WSI
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4/25/2012
WSI: Cooler Atlantic and Trend toward El Nino Suggest Less Active 2012 Tropical Season
Forecast Activity Significantly Less than Observed in 2010 and 2011
4/24/2012
WSI Expects the Focus of US Summer Warmth from the Southwest, across the Great Lakes and into the Northeast
Transition toward El Nino Conditions and Cooler North Atlantic Suggest Magnitude of Heat to be Reduced, Relative to Last Two Summers
4/23/2012
Weather Services International: Warmth Focused in Western and Northern Europe This Summer
Emerging El Nino, Lack of Atmospheric Blocking and Cooler North Atlantic Should Result in Much Different Pattern Relative to 2008-11 Summers
3/20/2012
WSI Expects Warm Spring and Early Summer across Northern and Interior Western US, Relatively Cool South-Central and Pacific Coast
Early Look at Summer Suggests Northern US at Greatest Risk for Anomalous Heat
3/19/2012
Weather Services International: Warm Late Spring and Early Summer Expected in UK and Northern Europe
Continued Lack of North Atlantic “Blocking” Will Likely Result in the Warmer Temps - a Reversal of 2008-11 Observed Summer Patterns
2/21/2012
WSI Expects Warm Spring Across the South, Cool West and Northeast
New El Nino Event Possible Heading into Summer
1/24/2012
WSI Expects Late-Winter Pattern Change Across US with Below-Normal Temperatures Becoming More Widespread
North Atlantic “Blocking” to Enable Colder US Temperatures
1/23/2012
Weather Services International: New Pattern of More Seasonable European Winter Temperatures Likely
North Atlantic “Blocking” Will End the Very Mild, Early Winter and May Usher in Much Cooler Weather
12/21/2011
WSI: Cooler Atlantic, Waning La Nina Suggest Relatively Tame 2012 Tropical Season
Forecast Number of Hurricanes & Intense Hurricanes Matches That Observed in 2011
12/20/2011
WSI Expects Increased Chances of Cold in Northeastern US, But Much Less Severe or Sustained than Recent Winters
US Gas-Heating Demand for January-March Period Expected to be Lowest Since 2006
12/19/2011
Weather Services International: Northern Europe Generally Mild for Remainder of Winter
Below-Normal Temperatures Confined to Parts of Southern Europe during the January-March Period
11/22/2011
WSI Expects a Return to More Moderate Winter Temperatures, but Still Anticipates Slightly Colder-Than-Normal Conditions across Northern and Western US
US Gas-Heating Demand Expected to be Lowest Since 2006-07 Winter
11/21/2011
Weather Services International Expects Mildest European Winter since 2007-08
Coldest Winter Temperatures Expected across France and Iberia
10/25/2011
WSI Expects Cold Late Fall & Early Winter in Northern and Eastern US
Cold Anticipated to be Less Extreme than Past Two Winters
9/21/2011
WSI Ups Its Named Storm Forecast to 21
Weather Authority Cites “Near Record Pace” of First Half of Season
9/20/2011
WSI Anticipates Another Cold Late Fall & Early Winter in the Eastern US
Increasing Chances of Below-Normal Temperatures in Eastern and Central US by November/December
9/19/2011
Weather Services International: Early Heating Season to be Cold in UK and Western European Mainland
Above-Normal Temperatures Expected in Nordic Regions and Eastern Mainland during Late Autumn/Early Winter
8/24/2011
WSI Increases Its Forecast from 15 to 18 Named Storms, Still Expects 8 Hurricanes and 4 Intense Hurricanes for 2011 Season
Weather Authority Anticipates an Active Remainder of Tropical Season with Further US Landfall Risk Following Irene
8/23/2011
WSI Expects a Warm Fall Season, Especially in Northern US
Increasing Chances of Below-Normal Temperatures in Eastern and Central US by November/December
8/22/2011
Weather Services International: Above-Normal Temperatures Emerging across the UK in September
Colder-than-Normal Temperatures Likely to Return in Late Autumn
7/27/2011
WSI Re-Affirms Forecast of 15 Named Storms, 8 Hurricanes and 4 Intense Hurricanes for 2011 Season
Weather Authority Forecasts an “Active-Normal” Season with Threat of Multiple Landfalls; Gulf States under Greatest Threat
7/26/2011
WSI Expects Hot Summer to Transition into Very Warm Fall
Focus of Warmth Will Shift from Southern Plains to Northern Plains and Northeast by October
7/25/2011
Weather Services International: Summer Pattern Generally Persists into August; Above-Normal Temperatures across UK in September
Colder-than-Normal Weather Emerging Across Mainland by October
6/22/2011
WSI Affirms Forecast of 15 Named Storms, 8 Hurricanes and 4 Intense Hurricanes For 2011 Season
Weather Authority Forecasts an “Active-Normal” Season with Threat of Multiple Landfalls; Gulf States Under Greatest Threat
6/21/2011
WSI Expects a Cool Period across the Southeastern US, with Widespread, Above-Normal Temperatures in the Southwestern Central & Northeastern US
Northern US Heat Will Become More Intense and Widespread Later in Summer
6/20/2011
Weather Services International: Warm Period Expected Across Most of Europe; Below-Normal Temperatures Confined to Iberia and Southern France
Warmest Summer Weather in UK Expected in August
5/25/2011
WSI Continues to Expect Multiple US Hurricane Landfalls in 2011
Weather Authority Anticipates an “Active-Normal” Season with the Gulf Coast Still Under the Greatest Threat
5/24/2011
WSI Expects a Cool Summer across US Great Lakes & Ohio Valley with Significant Heat Confined to Interior West
Eastern US Coastal Cities Expected to be Slightly Warmer than 30-Year Normal
5/23/2011
Weather Services International: Warm Summer Expected on European Mainland; Below-Normal Temperatures Confined to UK and Norway
Most Significant Warmth Expected Across Eastern Half of Mainland
4/27/2011
WSI: Multiple US Hurricane Landfalls Expected in 2011
Weather Authority Expects Another Active Season with Gulf Coast Under Greatest Threat
4/26/2011
WSI: Recent US Pattern of Below-Normal Temperatures North and Above-Normal South Will Persist into Early Summer, then Reverse During Back Half of Summer
La Nina Continues to Slowly Fade, but No El Nino Expected
4/25/2011
Weather Services International: Warmth to Continue Across Most of European Mainland and UK in May/June; Cooler, Wetter Conditions in UK by Late Summer
Most Significant Summer Warmth Expected Across Southern Mainland, Iberia, and Southeastern Europe
3/22/2011
WSI: Cool Weather Will Still Be Confined to Parts of Northern US during Late Spring and Early Summer
La Nina Impacts Linger as Summer Approaches
3/21/2011
Weather Services International: Cool Weather to Be Generally Confined to Northern Europe During April
Summer Warmth Likely Across the South, Uncertainty about Magnitude and Northward Extent of Above-Normal Temperatures
2/22/2011
WSI: Notably Cold Spring Expected across Northern US; Slightly Warmer than Normal in South-Central & Southeast
Expect Total US Gas Heating Demand During March-May Period To Be 20% More Than Last Year and 3% More Than 1971-2000 Average
2/21/2011
Weather Services International: Eastern European Cold Pattern Likely to Persist into March;
North Atlantic Oscillation to Remain Quiet into March
1/25/2011
WSI: Coldest Temperatures in North-Central and Northwestern US during January-March Period; Slightly Warmer than Normal in Southeast
Expect Total US Gas Heating Demand during February-April Period To Be 7% More Than Last Year and 2-3% More Than 1971-2000 Average
1/24/2011
Weather Services International: Recent Moderation of Extreme Cold to Last into February Followed by Sharp Return to Cold Heading into March
Milder Mid-Winter Period, But More Extreme Cold Likely Late
12/22/2010
WSI: Another Active Hurricane Season in 2011
Weather Authority Also Sees Increased Chances for US Landfall
12/21/2010
WSI: Coldest Temperatures in North-Central and Northwestern US during January-March Period; Quite Mild in South-Central States
Expect Total US Gas Heating Demand during January-March Period to be 1-2% More Than Both Last Year and 30-Year Averages
12/20/2010
Weather Services International: Moderation of Extreme Cold for Europe in January/February; a Colder Turn Again in March
Historic Pattern Likely to Relent Through Mid-Winter, Followed by an Additional Big Chill in Late Winter and Early Spring
12/1/2010
WSI Aces Major Hurricane Forecast Numbers
Weather Authroity Achieves High Marks Overall for Most Recent Set of Seasonal Atlantic Tropical Forecasts
11/23/2010
WSI: Coldest Winter Temperatures in North-Central US; Very Warm in South-Central States
Expect Total US Heating Demand during December-February Period to be 2-10% Less than Last Year and within 1% of 30-Year Averages
11/22/2010
Weather Services International Affirms Forecast: Another Cold Winter for UK & Western Europe, Especially Early, But Less Severe than Last Year
Persistent North Atlantic Oscillation Tempers Impacts of Strong La Nina Event, Suggesting Lower-than-Normal Temperatures
10/26/2010
WSI: Northeast US Cold Early and Late in Winter; More Consistent Cold in North-Central Region; Very Warm in South-Central States
WSI and ESAI Expect Total US Heating Demand during November-January and December-February periods to be within 3% of Last Year and within 1% of 30-Year Averages
10/25/2010
Weather Services International Expects Another Cold Winter for UK & Western Europe, But Less Severe than Last Year
Persistent North Atlantic Oscillation Trumps Impacts of Strong La Nina Event, Suggesting Lower-than-Normal Temperatures
9/22/2010
WSI Expects 2010 Hurricane Season to Finish Strong
Weather Authority Raises Intense Storm Count and Foresees Storm Tracks to be Greater Threat to US for Remainder of Season
9/21/2010
WSI: Warm October Followed by Colder November/December in US
WSI and ESAI Expect Total US Heating Demand during October-December Period to be within 1-2% of Both Last Year and 30-Year Averages
9/20/2010
Weather Services International Expects Warm Northern Europe, Cool Southern Europe
Warm Atlantic and Cold Pacific Suggest Below-Normal Temperatures Will Increase in Areal Coverage as Period Progresses
8/25/2010
WSI Expects a Very Active Remainder of 2010 Hurricane Season
Weather Authority Foresees Very Busy Season with an Increased Northeast US Threat
8/24/2010
WSI: Very Warm Fall Period in Store for Much of the US
WSI and ESAI Expect US Early-Season Heating Demand during September-November Period to Decrease 3% Year-Over-Year
8/23/2010
Weather Services International Expects Warm, Dry Autumn for Scandinavia, UK
Warm Atlantic and Cold Pacific Suggest Mild Period Will End in November
7/21/2010
Relatively Inactive June-July Period Forces Decrease in WSI 2010 Tropical Forecast From 20 to 19 Named Storms
Weather Authority Still Foresees Very Busy Season with an Increased Northeast US Threat
7/20/2010
WSI: US Summer Warmth to Persist Longer than Usual into Fall Season
WSI and ESAI Expect Cooling Demand during August-October Period to Increase 15% Year-Over-Year
7/19/2010
Weather Services International Expects Warm Late Summer for European Mainland and for Scandinavia during the Autumn
Recent Warm, Dry Weather to Continue into August
6/23/2010
WSI Again Increases Its Forecast Numbers for 2010 Hurricane Season
Weather Authority Extends Its Prediction for a Hyperactive Season with an Increased Northeast US Threat
6/22/2010
WSI: Moderate Heat to Build Across the Northern US During Second Half of Summer
WSI and ESAI Expect US Energy Usage during July-September Period to Increase 7-8% Year-Over-Year
6/21/2010
Weather Services International Expects Cool Period for Scandinavia, Northern Mainland and Above-Normal Temperatures for UK, Southern Mainland
Persistence of Negative Phase of North Atlantic Oscillation and Recent Rainfall over European Mainland to Discourage Significant or Sustained Heat
5/26/2010
WSI Raises Its April Forecast Numbers for 2010 Hurricane Season
Weather Authority Predicts Hyperactive Tropical Season with Magnified Northeast US Threat
5/25/2010
WSI US Summer Outlook: Moderate Heat to Build Across Northern States by July/August
WSI and ESAI Expect US Summer Energy Usage to Increase 4-5% Year-Over-Year
5/24/2010
WSI European Summer Forecast: Cool Weather Expected for UK, Scandinavia, Much Warmer Southern Mainland
Quick Transition to La Nina to Keep Heat Away Again
4/21/2010
WSI Significantly Increases Forecast Numbers for 2010 Hurricane Season
Weather Authority Predicts Increased Northeast US Threat During Most Active Season Since Record-Breaking 2005
4/20/2010
WSI: Cool Start, Warm Finish to Summer Across Most of Northern US and Plains
WSI and ESAI Anticipate US Summer Energy Usage To Increase 3-4% Year-Over-Year
4/19/2010
Weather Services International: Another Cool Summer Ahead for UK, Northern European Mainland
Persistence of Negative Phase of North Atlantic Oscillation, Cool Ocean Temperatures to Keep Heat Away Again
3/23/2010
WSI: Warm Temperatures Across Northern US in April/May, Much Cooler June
WSI expects the upcoming period (April-June) to average cooler than normal in the southeastern half of the US, with warmer temperatures in much of the western and northern US, especially in March/April. The WSI seasonal outlooks reference a standard 30-year normal (1971-2000).
3/22/2010
WSI - Europe To Be Cool in April with a Warming Trend Across the North in May & June
WSI expects temperatures for the approaching period (April-June) to average warmer than normal across Scandinavia, UK, and the extreme northern mainland.
2/23/2010
WSI - More Cold Temperatures South and East in March/April, Moderating Temps in the Midwest
WSI and ESAI Expect Total March-May Natural Gas Usage To Increase 4% Year-Over-Year, Further Reducing Gas Inventories
2/18/2010
WSI Expects European Cold to Move Northward in March and Milder Weather to Follow in Spring
WSI Corporation expects temperatures for the approaching period (March-May) to average warmer than normal across all European locations, except for Iberia.
1/27/2010
WSI Predicts 2010 Hurricane Season to be More Active than 2009
In its first hurricane season report for 2010, WSI Corporation calls for 13 named storms, 7 hurricanes and 3 intense hurricanes (category 3 or greater). The 2010 forecast numbers fall between the long-term (1950-2009) averages of 10 named storms, 6 hurricanes, and 3 intense hurricanes and the averages from the more active recent 15-year period (1995-2009) of 14/8/4.
1/21/2010
WSI Calls for Cold February and March in the Eastern US
WSI expects the upcoming period (February-April) to average cooler than normal in the eastern two-thirds of the US, with warmer temperatures in the western US, especially in March/April. The WSI seasonal outlooks reference a standard 30-year normal (1971-2000).
1/20/2010
WSI Expects Bitter Cold to Reappear in February after Brief Respite
WSI expects temperatures for the approaching period (February-April) to average colder than normal across Scandinavia, UK and most of the mainland, with the exception of parts of Iberia and the Mediterranean states.
12/22/2009
WSI Calls for Continuation of Cold Winter Across Much of US, Especially February/March in Northeast
WSI expects the upcoming period (January-March) to average cooler than normal in the entire US, with the exception of areas north and west of a line from Portland, Oregon to Minneapolis. The WSI seasonal outlooks reference a standard 30-year normal (1971-2000).
11/24/2009
WSI Forecasts a Cold Winter in Northern Mainland, parts of UK, Scandinavia
WSI expects the upcoming period (December-February) to average cooler than normal in Scandinavia, parts of the UK, and the northern mainland. “The combination of the current El Nino event, abundant Eurasian snow cover, and a favourable pattern of ocean temperatures in the Atlantic Ocean suggest that this winter will be a cold one across much of northern and central Europe, especially after the New Year” said WSI seasonal forecaster Dr. Todd Crawford. “For the UK, we expect total winter energy usage to be somewhere between that of the last two winters.”
11/24/2009
WSI Calls for Cold Winter in Eastern US, Especially After New Year
WSI expects the upcoming period (December-February) to average cooler than normal in the eastern and south-central US, with above-normal temperatures common across the western and north-central US. The WSI seasonal outlooks reference a standard 30-year normal (1971-2000).
10/20/2009
WSI Calls for Cold Winter in Eastern US, Especially After New Year
WSI expects the upcoming period (November-January) to average cooler than normal in the eastern and south-central US, with above-normal temperatures common across the western and north-central US. The WSI winter forecast (December-February) shows below-normal temperatures across the eastern and southern US, with above-normal temperatures across the northwestern half of the country. The WSI seasonal outlooks reference a standard 30-year normal (1971-2000).
9/22/2009
WSI Calls for Cold Period in Southeast, most of Central US during October-December Period
WSI expects the upcoming period (October-December) to average cooler than normal in the southeastern and central US, with above-normal temperatures common across the Northeast and Southwest. The WSI seasonal outlooks reference a standard 30-year normal (1971-2000).
8/29/2009
WSI Calls for Warm Period in Western US and Northeast during September-November Period; Cool Southeast
WSI expects the upcoming period (September-November) to average cooler than normal in the southeastern US, with above-normal temperatures common elsewhere. Areas from the Southwest to the Pacific Northwest may be especially warm, compared to historical normals. The WSI seasonal outlooks reference a standard 30-year normal (1971-2000).
8/25/2009
WSI Issues August Update for 2009 Hurricane Season
WSI Corporation’s updated 2009 hurricane season forecast maintains their July outlook for 10 named storms, 5 hurricanes, and 2 intense hurricanes (category 3 or greater). As of this release, there have been 3 named storms (Ana, Bill, Claudette), 1 hurricane (Bill), and 1 intense hurricane (Bill).
7/22/2009
WSI Calls for Continuation of Cool Temperatures in Most of Eastern US; Warm West, during August-October Period
WSI expects the upcoming period (August-October) to average cooler than normal across the eastern half of the US, with above-normal temperatures common across the western US. Areas from the Southwest to the Pacific Northwest may be especially warm, compared to historical normals. The WSI seasonal outlooks reference a standard 30-year normal (1971-2000).
7/21/2009
WSI Issues July Update for 2009 Hurricane Season
WSI Corporation’s updated 2009 hurricane season forecast now calls for 10 named storms, 5 hurricanes, and 2 intense hurricanes (category 3 or greater), a slight reduction from the previous forecast of 11 named storms, 6 hurricanes, and 2 intense hurricanes.
6/24/2009
WSI Calls for Cool Period in Most of Eastern US, Warm West During Remainder of Summer
WSI expects the upcoming period (July-September) to average cooler than normal across the eastern third of the US, with above-normal temperatures common across the western US. The highest probability for a cooler-than-normal period is in the Southeast, while the Rockies and Pacific Northwest are most likely to experience above-normal temperatures. The WSI seasonal outlooks reference a standard 30-year normal (1971-2000).
6/23/2009
WSI Issues June Update for 2009 Hurricane Season
WSI Corporation’s updated 2009 hurricane season forecast continues to call for 11 named storms, 6 hurricanes, and 2 intense hurricanes (category 3 or greater).
5/28/2009
WSI and ESAI issue an update of special interest to energy traders
WSI expects the upcoming summer (June-August) to average cooler than normal across most of the eastern US, with above-normal temperatures common across the western US. The highest probability for a cool summer is in the Southeast, while the Southwest, Rockies, and Northwest are most likely to have a warm summer. The WSI seasonal outlooks reference a standard 30-year normal (1971-2000).
5/27/2009
WSI Issues Updated 2009 Hurricane Season Forecast
WSI Corporation’s updated 2009 hurricane season forecast continues to call for 11 named storms, 6 hurricanes, and 2 intense hurricanes (category 3 or greater).
4/22/2009
WSI Calls for Cool Summer in Southeast, Slightly Warmer-than-Normal in Northeast
WSI expects the upcoming three-month period (May-July) to average cooler than normal across parts of the Southeast and north-central US, with above-normal temperatures common across the Northeast and Southwest. WSI also expects the summer period (June-August) to be cool across the Southeast, mid-Atlantic, Ohio Valley, and southern and central Plains, with above-normal temperatures confined to the Rockies and Northeast. The WSI seasonal outlooks reference a standard 30-year normal (1971-2000).
4/20/2009
WSI Issues 2009 Hurricane Season Update
WSI Corporation’s updated 2009 hurricane season forecast now calls for 11 named storms, 6 hurricanes, and 2 intense hurricanes (category 3 or greater).
3/24/2009
WSI Energycast Outlook Calls for Cool Spring in Northern US; Generally Warm South
WSI expects the upcoming three-month period (April-June) to average cooler than normal across much of the northern tier of the US along with parts of the Southeast, with above-normal temperatures across the south-central and southwestern US. The WSI seasonal outlooks reference a standard 30-year normal (1971-2000).

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