![]() ![]() The closer Monona rises to 847.00, the more ineffective our drainage system in these low areas becomes at addressing high intensity summer storms (1" per hour). These areas drain to Lake Monona and/or the Yahara River mostly at East Washington. The highest stage on record is not necessarily above the other three flood categories it may be within any of them or even less than the lowest, particularly if the period of record is short (e.g., a few years). The problem low ground elevations in the Isthmus area are at about elevation 848.0-849.00. Record Flooding: Flooding which equals or exceeds the highest stage or discharge observed at a given site during the period of record. The summer max by WDNR order is 845.20 (so we are approximately 1 foot, 6 inches over). Monona is at 846.73 up from 846.69 last week. An Areal Flood Advisory is an alert issued through the Emergency Alert System that is issued when minor urban and small stream flooding is expected to occur. The 100-year elevation is 852.8, but we can only currently effectively rise to approximately 852.0. The summer max by WDNR order is 850.10 (so we are approximately 7 inches over summer max). Mendota is at 850.71, which is up from 850.68 last week. Lake Mendota TodayĬhange from one month ago = down 0.18 feetĪbove/below summer maximum: Above by 0.61 feetĪbove or below 100 year elevation: Down 2.09 feet Lake Mendota Statisticsġ00-Year Record = 852.8 feet Lake Monona TodayĪbove/below summer maximum: above by 1.53 feetĪbove or below 100 year elevation: down 0.97 feet Lake Monona Statistics An areal flood, therefore, is one that occurs slowly, over a longer period of time due to sustained rain rather than one, quick, heavy storm. We experience no significant additional flood risk due to the current lake levels. Recall typically 1 inch of rain in the Yahara Watershed typically gets you a 3-inch rise in the elevation of Lake Monona. We are not sending these to elevate concern, this is just a new communication option for us to keep you informed as flooding deeply impacted our community last summer, and may be top of mind when rain moves through our area. Flooding occurs more than 6 hours after rainfall begins. To keep people informed, we’re sharing a weekly update with you, and as frequently as needed, should a major rain event happen. Areal flood A gradually developing flood, due to moderate to heavy rainfall. The Engineering Division is monitoring lake levels and the potential to flood year round. Zur Anzeige des Warntextes gewnschten Ort ber Suchmaske eingeben oder Warnung in Karte selektieren. ![]() Warner Park Community Recreation Center.Planning, Community & Economic Development.Flood watch in effect from Thursday (2/6/20) afternoon through Friday afternoon (2/7/20). The wording within the Flood Watch/Warning, River Flood Watch/Warning, and Flood Advisory will be reformatted with What, Where, When, Impacts, Additional Details. Areal Flood Watch for Montgomery County and Cheltenham Township. Search Menu Toggle navigation City of Madison Urban and Small Stream Flood Advisory, Small Stream Flood Advisory, Flood Advisory, Hydrologic Advisory will be consolidated to Flood Advisory.
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