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Author: Jan Verkade

Should the forecaster modify an ensemble hydrological forecast? A case study.

Should the forecaster modify an ensemble hydrological forecast? A case study.

Andrea is an operational forecaster at the US National Weather Service’s North Central River Forecast Centre. She writes about some very specific forecasting challenges that she and her colleagues are faced with on a daily basis. Introduction Devils Lake water levels have risen over 10 meters in the past 22 years. Due to natural variability in winter precipitation, the water level may further rise in spring as a result of melting of the snowpack in the lake’s basin. Such a…

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HEPEX site outage

HEPEX site outage

Returning visitors may have found the HEPEX site apparently “down” in the last few days. While direct links to posts have been properly working all along, the portal’s front page showed an error message. As it turned out, one of the plugins was acting up. We solved the issue by parting ways. There are still some remaining issues with respect to the links within the HEPEX site and we’re hoping to solve these in the next few days. Apologies for…

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22 Years and Still Flooding

22 Years and Still Flooding

by Andrea Holz, a HEPEX 2015 Guest Columnist Andrea is an operational forecaster at the US National Weather Service’s North Central River Forecast Centre. She writes about some very specific forecasting challenges that she and her colleagues are faced with on a daily basis. Devils Lake is the most fascinating, expensive and devastating piece of hydrology out of the 900,000 square kilometer drainage area under the responsibility of the US NWS North Central River Forecast Center. High lake levels are part…

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Welcome to HEPEX 2015

Welcome to HEPEX 2015

Contributed by Andy Wood, Maria-Helena Ramos, Fredrik Wetterhall, Florian Pappenberger and Jan Verkade A new year starts for the HEPEX Portal. Last year, a list of New Year’s resolution was proposed and many of you (certainly!) followed our suggestions. 2014 was consequently successful again for HEPEX, and full of interesting discussions (see our summary here). Last year’s list is definitely still valid for 2015. Prepare your new coming year and be attentive to some main activities coming soon under HEPEX,…

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HEPEX 2014 achievements

HEPEX 2014 achievements

Contributed by Andy Wood, Maria-Helena Ramos, Fredrik Wetterhall, Florian Pappenberger, Jan Verkade and Nathalie Voisin 2014 is (almost) over… Did you miss something? It all started with four people having something to say…: our 2014 HEPEX columnists did a great job and shared with us their thoughts, doubts, ideas and projects. You can read their columns again here. We expect they will keep on contributing to the website, while new ones are planned to 2015. Who are they??…. Keep following…

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