Vaisala Acquires Renewable Energy Assessment and Forecasting Services Company

| Source: Vaisala
Vaisala Corporation
Stock Exchange Release
December 17, 2013 at 8:05 p.m.

Vaisala strengthens its position in the renewable energy market through the
acquisition of 3TIER Inc., a US-based company with USD 9.0 million net sales in
2012 and 55 employees. The value of the deal is EUR 10.7 million. Vaisala is
using its existing cash balance to finance the transaction. This acquisition
will not have a material impact on Vaisala's 2013 financial result or balance
sheet. Market guidance for 2014 will include also 3TIER's impact on Vaisala's
financial result and it will be disclosed on February 10, 2014 in Vaisala's
financial report for January-December 2013.

3TIER provides project feasibility, asset management and forecasting services to
companies operating in the renewable energy market globally. While the majority
of 3TIER's business comes from the wind energy market, the company also serves
customers in the solar and hydro energy markets. 3TIER complements Vaisala's
strong environmental sensing business, and its international distribution
network will provide significant growth opportunities in Brazil, Nordic
countries, China, Australia, India and the USA.

"The renewable energy market is a focus area of Vaisala's Weather business, and
the acquisition of 3TIER with its wind and solar energy emphasis, aligns
perfectly with Vaisala's strategy. Wind energy represents an extensive market
with long-term growth opportunities. 3TIER brings Vaisala valuable capabilities
in renewable energy assessment and forecasting services applicable across our
other segments as well," tells Kai Konola, Executive Vice President of Vaisala
Weather Business.

Vaisala's strategic intent has been to build a stronger position in the
renewable energy sector. The acquisitions of Second Wind in August and 3TIER
today are logical steps, and together with Vaisala's offering create a full
service renewable energy observation and information services business.

For Further Information Please Contact:
Kai Konola, Executive Vice President of Vaisala Weather Business
Tel. +358 40 5024 900, kai.konola[at]

Key media

About 3TIER
3TIER is an experienced provider of renewable energy assessment and forecasting
services to the largest utilities, energy traders, financiers, and project
developers around the world. With a staff of experts in weather, climate, and
wind and solar risk, 3TIER helps its clients make profitable energy decisions.
3TIER has global reach with offices serving North America, Europe, the Middle
East, Africa, India, Latin America, and the Asia Pacific region. 3TIER is
headquartered in Seattle, Washington. For more information, visit

About Vaisala
Vaisala is a global leader in environmental and industrial measurement. Building
on 75 years of experience, Vaisala contributes to a better quality of life by
providing a comprehensive range of innovative observation and measurement
products and services for chosen weather-related and industrial markets.
Headquartered in Finland, Vaisala employs approximately 1,400 professionals
worldwide and is listed on the NASDAQ OMX Helsinki stock exchange. For more
information, visit