Ohio, 2001Flash Flood in Ohio, July 20, 2001
July 20, 2001 · NWS ILN · 1 event in 1 county or zone
1 flash flood, as filed by the National Weather Service.
Every event with a place to put it; 1 filed by county or forecast zone are drawn at its center, in a lighter ring. Tap one for its entry below.
- Tornadoes
- Tropical storms and surge
- Floods
- Wind
- Hail
- Winter weather
- Heat and drought
- Cold
- Fire, smoke and dust
- Marine and coastal
- Other
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- Deaths
- 0
- Injuries
- 0
- Property damage
- None recorded
- Crop damage
- None recorded
- Events
- 1
Deaths and injuries are direct and indirect together, as the offices filed them. Damage is property and crops in the dollars of the year, not adjusted for inflation, and only where an office estimated it.
What forecasters said that day
The local office's own words before the first event, as it sent them, from the Iowa Environmental Mesonet's archive of National Weather Service text.
NWS Wilmington, OH wrote its last area forecast discussion before the first event at Jul 20, 2:21 PM EST, 2 hours 29 minutes earlier.
Area forecast discussion, Jul 20, 2:21 PM EST, 2 hours 29 minutes before
AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE WILMINGTON OH
321 PM EDT FRI JUL 20 2001
PERSISTENT UPPER AIR PATTERN SHOWS TROF OFF THE EAST COAST AND RIDGE
AXIS OVER THE PLAINS. WITH UPPER RIDGE AXIS REMAINING TO OUR
WEST...WEAK NORTHERLY FLOW ALOFT WILL CONTINUE ACROSS THE OHIO
VALLEY THROUGH THE WEEKEND.
AT THE SFC...WEAK BOUNDARY NEAR THE OHIO RIVER REMAINS BETWEEN HIGH
OVER NEW YORK AND BROAD DIFFUSE LOW OVER THE HIGH PLAINS. 70+ DEW
POINTS ARE EVIDENT FROM OUR PART OF THE OHIO VALLEY WEST TO THE
MISSISSIPPI VALLEY. THIS SOUPY AIRMASS WILL STAY SITUATED ACROSS
OUR AREA THROUGH THE FCST PERIOD.
RADAR SHOWS WDLY SCT SHRA/TSRA AROUND OUR CWA. WITH MODELS SHOWING
LIMITED UPPER SUPPORT TONIGHT...ILL GO WITH 30 POPS FOR THIS
EVENING ALL ZONES AS COVERAGE SHOULD REMAIN SCT WITH LACK OF STRONG
FORCING.
WITH UNSTABLE AIR REMAINING IN PLACE AND MODELS INDICATING MORE PVA
ROUNDING THE UPPER RIDGE...ILL CARRY 30 POPS FOR AFTERNOON TSRA
SATURDAY AND SUNDAY. ILL ALSO CARRY 30 POPS SATURDAY NIGHT FOR
ACTIVITY THAT MAY LINGER INTO EVENING.
SLOW MOVING UPPER FLOW AND PWAT AROUND 1.7 GIVE HEAVY RAIN
POTENTIAL TO ANY STORMS THAT DEVELOP...THOUGH FFG VALUES HAVE
REBOUNDED CONSIDERABLY SINCE THE HEAVY RAIN OF A COUPLE DAYS AGO.
WITH SODDEN AIRMASS HANGING AROUND...ILL KEEP MENTION OF FOG FOR
TONIGHT.
WITH A SLIGHT WARMING TREND OCCURRING IN OUR STAGNANT AIRMASS...FWC
TEMPS LOOK A BIT LOW SO ILL GENERALLY GO A DEGREE OR TWO ABOVE.
.ILN...NONE.
CONIGLIO
Flash Flood, Hamilton
- When
- July 20, 4:50 PM EST to 6:00 PM EST
- Where
- Hamilton County, Greenhills
- Reported by
- LAW ENFORCEMENT
- Coordinates
- 39.196, -84.543 (the zone’s center; the record gives no point)
Thunderstorms produced heavy rain which closed two roads and flooded two basements.
- Flash Flood
- Flooding that begins within six hours of the rain that causes it, or of a dam or levee failure or ice jam release, often with deadly speed.
After NWS Directive 10-1605, the rules offices file Storm Data by.
- Heat in Wisconsin, July 20, 20011 death · 1 event
- Tornadoes and Hail in Montana, July 20, 2001$2.5 million · F0 · 41 events
- Hail and Damaging Winds in North Dakota, July 20, 2001$22,000 · 1.25 in hail · 10 events
- Damaging Wind and Lightning Strike in Georgia, July 20, 20012 injured · $500 · 2 events
- Hail in South Dakota, July 20, 20011.75 in hail · 2 events
- Flash Flooding in Indiana, July 20, 20012 events
- Flash Flooding in Montana, July 20, 20012 events
- Hail and Damaging Wind in Nebraska, July 20, 200162 kt wind · 2 events
- High Surf in Hawaii, July 20 to 23, 20012 events
- Damaging Wind in North Dakota, July 20, 200162 kt wind · 1 event
- Damaging Wind in North Dakota, July 20, 200152 kt wind · 1 event
- Hail in North Dakota, July 20, 20011 in hail · 1 event
NOAA National Centers for Environmental Information, Storm Events Database, compiled from the National Weather Service’s monthly Storm Data. Complete through 2026-06; NCEI adds each month about 75 days after it ends and revises past years a few times a year. Rebuilt 2026-09-24. Each event’s entry at NCEI: 5257029.