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.
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.
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 Gaylord, MI wrote its last area forecast discussion before the first event at Aug 1, 7:55 PM EST, 3 hours 5 minutes earlier.
AREA FORECAST DISCUSSION NATIONAL WEATHER SERVICE GAYLORD MI 855 PM EDT WED AUG 1 2001 UPDATES TO THE ERN UPR/NRN LWR MI FORECASTS THIS EVENING WILL BE MAINLY BASED ON TIMING OF SHOWERS/THUNDERSTORMS. OUTFLOW FROM MCS ACROSS WI IS STARTING TO KICK OFF A BROKEN LINE OF CONVECTION ACROSS ERN UPR/NW LWR MI. WEAK CAP NOTED AROUND 750 MB IS ERODING SOMEWHAT GIVEN WEAK DPVA/UPWARD OMEGA AHEAD OF THE WEAKENING MID LEVEL MESO-CONVECTIVE VORT MAX...AND ALSO FROM THE INCREASING MOISTURE (EVAPORATIVE COOLING) WITHIN THAT LAYER. THE PRE-FRONTAL... MCS-INDUCED SURFACE TROUGH CURRENTLY RESIDES ACROSS CENTRAL UPPER MI S THROUGH NRN LAKE MI...WITH A MESO-HIGH ACROSS CENTRAL WI AND THE MAIN FRONT ACROSS ERN MINNESOTA SW THROUGH NRN IOWA. CONCERN FOR TONIGHT WILL BE THE HEAVY RAIN POTENTIAL. 00Z RAOB DATA INDICATED FREEZING LEVELS BETWEEN 15-16KFT AT KAPX/KGRB. DEGREE OF POSITIVE BUOYANCY OR CAPE IS LIMITED WITH THE WARM TEMPS ALOFT (500 MB TEMPS ONLY -6C) AND AFOREMENTIONED WEAK CAP AROUND 750 MB. THE UPPER RIDGING/WARM CORE ALOFT IS EVIDENCED BY THE ANTI-CYCLONIC ROTATION OF CLOUD TOPS PER IR IMAGERY. MODIFIED KAPX 00Z SOUNDING FOR 83/72 TEMP/DEWPOINT PROFILE EARLY THIS EVENING YIELDS CAPES BETWEEN 2000-2500 J/KG AND LI'S AROUND -5C. TOTAL-TOTALS IN THE MID 40S HOWEVER ARE INDICATIVE OF RATHER MEAGER 850/500 MB LAPSE RATES...WITH THE CAPE DISTRIBUTED MUCH MORE SO VERTICALLY THAN HORIZONTALLY (THUS LIMITING UPDRAFT STRENGTH). THIS ALONG WITH RELATIVELY WEAK WINDS ALOFT (30-35KTS) AND HIGH FREEZING/WET BULB ZERO LEVELS WILL LIMIT THE SEVERE WEATHER THREAT THIS EVENING. HOWEVER...K INDICES IN THE MID 30S AND PWATS AROUND 2.00" ARE CERTAINLY SUPPORTIVE OF HEAVY RAIN...ESPECIALLY SINCE 925-850 MB WINDS WILL BE NEARLY PARALLEL TO AND EQUAL/EXCEED THE MID LEVEL OR CLOUD-BEARING FLOW OVERNIGHT (THUS LEADING TO SMALL CORFIDI VECTORS). WILL CONTINUE WITH THE HIGH POPS AND HEAVY RAINFALL POTENTIAL OVERNIGHT GIVEN THE AFOREMENTIONED OUTFLOW BOUNDARIES SPREADING INTO THE REGION. EVEN AS THE SURFACE LAYER STABILIZES (NOCTURNAL CAP DEVELOPS)...SUPPORT WILL BE THERE FOR ELEVATED CONVECTION OVERNIGHT AHEAD OF THE MAIN FRONT GIVEN THE 30-35 KT INFLOW AND THETA-E RIDGING/CONVERGENCE OFF THE SURFACE (BETWEEN 925-850 MB). UPDATED ZONE PACKAGE TO BE ISSUED BETWEEN 930 AND 10 PM. .APX...NONE. HURLEY
The NCL Michigan radar (KAPX), 65 km away, was scanning. The volume nearest the first event began at 03:58 UTC.
1 flash flood. Local standard time, as filed.
Thunderstorms produced street flooding in the city of Cheboygan as they repeatedly developed and moved over the city.
After NWS Directive 10-1605, the rules offices file Storm Data by.
Every storm in Michigan in 2001Every state in 2001This day in weather historyWarnings in Michigan, August 2001
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: 5267320.