St. Lucia's flood
December 1287 storm tides strike the southern North Sea coasts
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Original prompt & settings (JSON) ↗At Hickling, floodwater reportedly stood more than a foot above the church's high altar.
December 1287, on a date nobody agrees on
A destructive storm tide struck the Low Countries and neighbouring North Sea coasts in December 1287, breaching or overtopping coastal defences, inundating settlements and causing deaths and permanent land loss.
The event is traditionally called the St Lucia flood and dated 13–14 December, but medieval chroniclers also supplied other days: the Dutch chronicler Melis Stoke gives 17 December, and the English chronicler John of Oxnead gives 26 December.
Researchers cannot determine whether these accounts describe one storm with confused dates or several storms in the same month.
What the chronicles describe
English accounts associated with the December flooding describe people climbing trees and then falling into the water, damage to Great Yarmouth's cemetery wall, and floodwater rising more than a foot above the high altar at Hickling.
English chronicles report about 180 to 200 deaths at Hickling. The island settlement of Griend was reportedly reduced to roughly ten houses plus the church choir.
The often-repeated regional toll of 50,000 to 80,000 is a traditional estimate, not a securely reconstructed demographic count.
It did not make the Zuiderzee
The flood contributed to further erosion and enlargement of the Wadden Sea–Zuiderzee landscape, but it did not create the Zuiderzee in a single night.
Archaeological and geological studies place that formation across repeated twelfth- and thirteenth-century floods, and the Zuiderzee already existed by about 1170. Dutch dike building also predated 1287, so coastal management did not begin as a response to this disaster.
Floris V of Holland subsequently exploited the flood-weakened and isolated condition of West Friesland during his conquest.
Sources
- James Lewis, Meteorological Disasters in Medieval Britain (AD 1000–1500)
- Yftinus T. van Popta, “No Country for Men: Searching for Late Medieval Submerged Settlements in the North-Eastern Zuiderzee Area”
- Hanna Hadler et al., “Medieval Overexploitation of Peat Triggered Large-Scale Drowning and Permanent Land Loss in Coastal North Frisia”
- Guus J. Borger, “De Zijpe en de Zuiderzee”
Researched 23 Aug 2026 5 sources not yet audited Date disputed
How this was checked
Researched from the web into a fact sheet and rewritten from that sheet. This article has not yet had an independent model audit. How the pipeline works →
Date disputed. Sources disagree; the research places it at 1287-12.
What the sources leave uncertain
- The exact date is disputed: sources give 13–14, 17, and 26 December 1287, possibly because there were several storms.
- The medieval dates use the Julian calendar and saint-day conventions; they should not be silently treated as modern Gregorian dates.
- The often-repeated toll of 50,000–80,000 is a traditional regional estimate, not a securely reconstructed demographic count.
- Evidence does not establish that the December event reported in England was necessarily the identical storm tide experienced in the Low Countries.
Checked against
- James Lewis, Meteorological Disasters in Medieval Britain (AD 1000–1500)
- Yftinus T. van Popta, “No Country for Men: Searching for Late Medieval Submerged Settlements in the North-Eastern Zuiderzee Area”
- Guus J. Borger, “De Zijpe en de Zuiderzee”
- Hanna Hadler et al., “Medieval Overexploitation of Peat Triggered Large-Scale Drowning and Permanent Land Loss in Coastal North Frisia”
- C. de Bont, “Digging the River: The Historical Geography of the Amstel Area (800–1275 AD)”