Flood and Hail in Michigan, June 22 to 23, 2011

Name: Flood and Hail in Michigan, June 22 to 23, 2011
Start: 2011-06-22T13:00
End: 2011-06-23T14:00
Location: Michigan

June 22 to 23, 2011 · NWS DTX · 38 events in 13 counties and zones

Where it happened

Every event with a place to put it. 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

Open the live radar over this ground

The toll

Deaths: 0
Injuries: 1
Property damage: $129,000
Crop damage: None recorded
Events: 38

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 happened

The episode as NWS DTX wrote it up.

A very moist unstable airmass was in place across southeast Michigan as a warm front had passed through the area the previous night. Storms developed out to the west along a cold front and moved through the area as an organized line of storms during the afternoon hours. Numerous reports of tree damage were associated with the damaging wind gusts, with a few reports of large hail. Heavy rain produced flooding in St. Clair County which continued during the overnight hours.

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 Detroit, MI wrote its last area forecast discussion before the first event at Jun 22, 10:52 AM EST, 2 hours 8 minutes earlier.

Area forecast discussion, Jun 22, 10:52 AM EST, 2 hours 8 minutes before

AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE DETROIT/PONTIAC MI
1152 AM EDT WED JUN 22 2011

.UPDATE...

AS OF 15Z...CONVECTION IS STARTING TO DEVELOP AHEAD OF THE
APPROACHING COLD FRONT FROM WESTERN LOWER MICHIGAN TO NORTHWEST
INDIANA. VISIBLE SATELLITE SHOWS AN AREA OF PARTLY CLOUDY SKIES IN
ADVANCE OF THIS AREA ACROSS CENTRAL LOWER MICHIGAN WHERE
TEMPERATURES HAVE REACHED THE UPPER 70S ALREADY...WHILE MOST OF
SOUTHEAST MICHIGAN HAS BEEN SLOWER TO WARM BENEATH EARLY OVERCAST
SKIES. THIS AREA OF PARTLY CLOUDY SKIES WILL EXPAND EASTWARD
THROUGH EARLY AFTERNOON...PROVIDING A BETTER OPPORTUNITY TO
DESTABILIZE IN ADVANCE OF THE STRONG FORCING PROVIDED BY THE
APPROACHING LOW PRESSURE SYSTEM.

A LOOK AT THE 12Z DTX SOUNDING DOES SHOW A WARM LAYER OF AIR IN THE
650-750MB LAYER WITH TEMPERATURES AS HIGH AS 9C. ALTHOUGH THIS WARM
AIR WAS A LITTLE CONCERNING AND UPDRAFTS REMAIN FAIRLY SMALL TO OUR
WEST...STORM TOPS ARE ALREADY MAKING IT TO 25-30 KFT AND ARE ONLY
EXPECTED TO INCREASE IN STRENGTH AS THE AFTERNOON PROGRESSES. WITH
THAT SAID...SPC HAS INCREASED THE PROBABILITY OF SEVERE WINDS TO 30
PERCENT FOR TODAY ACROSS ALL OF SOUTHEAST MICHIGAN GIVEN THE
FAVORABLE DYNAMICS AND STRONG WIND FIELD MOVING INTO THE AREA FOR
THE AFTERNOON. STORMS THUS FAR ARE EXHIBITING DISCRETE
CHARACTERISTICS SO CAN NOT RULE OUT SUPERCELL STORMS AND ISOLATED
TORNADOES. 0-6KM SHEAR OF 40-50 KNOTS IS EXPECTED TO OVERSPREAD
SOUTHEAST MICHIGAN ALTHOUGH THE FLOW IS EXPECTED TO BE FAIRLY
UNI-DIRECTIONAL SO WE ARE STILL EXPECTING THE GREATEST THREAT TO BE
STRONG STRAIGHT LINE WINDS. PEAK TIME FRAME FOR SEVERE WEATHER WILL
BE FROM 2PM-6PM WITH STORM MOTION TO THE NORTHEAST AT 30-40 MPH.

&&

.PREV DISCUSSION...ISSUED 714 AM EDT WED JUN 22 2011

AVIATION

//DISCUSSION...

THE WARM SECTOR OF THE UNSEASONABLY LARGE LOW PRESSURE SYSTEM OVER
THE MIDWEST WILL COVER SE MICHIGAN THROUGH TODAY. SOUTHERLY GRADIENT
FLOW OF WARM AND HUMID AIR WILL BE STRONG ENOUGH TO PREVENT MUCH FOG
FORMATION BUT FOSTER STRATUS FORMATION THIS MORNING. THIS IS
EXPECTED TO CONSTITUTE AN MVFR CEILING UNTIL AT LEAST LATE MORNING
BEFORE MIXING OUT TO VFR DURING THE AFTERNOON. ANOTHER ROUND OF
SHOWERS AND THUNDERSTORMS IS THEN POSSIBLE AS SURFACE HEATING
INTENSIFIES BY MID TO LATE AFTERNOON INTO THIS EVENING. AT THIS TIME
WILL INCLUDE A TEMPO GROUP FOR THUNDERSTORMS DURING A 4 HOUR WINDOW
WHEN A LINE OF THUNDERSTORMS ARE EXPECTED TO PASS OVER THE TAF
SITES...ANYWHERE FROM 20Z TO 24Z.

A DRY SLOT WILL THEN BRING A BRIEF BREAK IN THE ACTIVITY LATER THIS
EVENING...WITH ADDITIONAL SHOWERS EXPECTED AROUND 06Z AS THE UPPER
LEVEL LOW AND ASSOCIATED SHORTWAVES MAKE THEIR WAY OVER THE CENTRAL
GREAT LAKES. THE BRIEF IMPROVEMENT IN CONDITIONS WILL BE SHORT LIVED
AS MVFR CONDITIONS WILL COME BACK LATER TONIGHT WITH THE SHOWERS.

FOR DTW...

WARM SECTOR MVFR STRATUS IS ALREADY MAKING ITS PRESENCE FELT...AND
IS EXPECTED TO LAST THROUGH MUCH OF THE MORNING. THIS WILL ENSURE
CEILING BELOW 5000 FEET UNTIL AT LEAST EARLY AFTERNOON BEFORE THE
CLOUDS BECOME SCATTERED BUT WITH BASES AROUND THE THRESHOLD.

//DTW THRESHOLD THREATS...

* HIGH CONFIDENCE CEILING WILL REMAIN BELOW 5000 FEET DURING THE
  MORNING...BUT MEDIUM CONFIDENCE CEILINGS WILL REMAIN BELOW 5000
  FEET THIS AFTERNOON.

* MEDIUM CONFIDENCE THUNDERSTORMS WILL OCCUR THIS AFTERNOON AND THIS
  EVENING AND MEDIUM CONFIDENCE ON TIMING AND COVERAGE.

PREV DISCUSSION...ISSUED 413 AM EDT WED JUN 22 2011

SHORT TERM...TODAY

THE OVERNIGHT CONVECTION IS MOVING NORTH AND AWAY FROM THE CWA EARLY
THIS MORNING...AS THE WARM FRONT SURGES NORTH INTO THE CENTRAL GREAT
LAKES. A SECONDARY FRONT CURRENTLY VISIBLE ON RADAR ACROSS THE
SOUTHERN GREAT LAKES COULD IGNITE FURTHER CONVECTION LATER THIS
MORNING...HOWEVER THE 4KM SPC WRF MODEL DOES NOT FIRE MUCH WITH THIS
BOUNDARY AS IT MOVES NORTH THROUGH THE AREA. WITH THE COVERAGE OF
ANY CONVECTION THAT FIRES LATER THIS MORNING EXPECTED TO BE FAIRLY
SCATTERED...WILL PUT IN A CHANCY POP ACROSS THE AREA.

THIS AFTERNOON WILL BE MUCH DIFFERENT AS THE DYNAMICS BECOME MUCH
MORE FAVORABLE FOR ADDITIONAL THUNDERSTORMS. AN APPROACHING 925MB
SURGE OF COOLER AIR WILL COMPLETELY ERODE ANY CIN AS MUCAPE VALUES
SURGE TO 1.5 TO 2 J/G. WITH HELICITY VALUES INCREASING TO 150 TO
200 AND A CURVED HODOGRAPH WELL ORGANIZED STORMS ARE EXPECTED TO
FORM DURING THE AFTERNOON HOURS. THE AREA WILL ALSO BE IN THE LEFT
EXIT REGION OF AN APPROACHING UPPER LEVEL JET AND ON THE NOSE
OF THE 850MB LOW LEVEL JET DURING THE AFTERNOON HOURS. THE 4KM SPC
WRF SHOWS STORMS BEING OF A LINEAR NATURE WITH A LINE OF WELL
ORGANIZED THUNDERSTORMS MARCHING THROUGH THE AREA DURING THE
AFTERNOON HOURS. WITH THE VERY FAVORABLE DYNAMICS IN PLACE WILL HAVE
HIGHER POPS IN THE AFTERNOON IN THE LIKELY CATEGORY. THE INSTABILITY
AND SHEAR LEND THEMSELVES FOR THIS LINE OF STORMS TO PRODUCE SOME
DAMAGING WIND AND HAIL WHICH IS IN LINE WITH THE SPC DAY 1 SLIGHT
RISK THREAT OVER THE ENTIRE CWA. HOWEVER SOME SUPERCELLS EMBEDDED IN
THE LINE ARE ALSO POSSIBLE GIVEN THE CAPE VALUES AND CURVED
HODOGRAPH.

THE NEXT ISSUE TO CONTEND WITH IS HYDRO AS THE THUNDERSTORMS FROM
LAST NIGHT DUMPED A GOOD 1 TO 3 INCHES OF RAIN ALONG AND NORTH OF
INTERSTATE 69 WITH SEVERAL REPORTS OF FLASH FLOODING DURING THE
OVERNIGHT HOURS. WITH ANOTHER ROUND OF HEAVY RAIN EXPECTED THIS
AFTERNOON AND INTO TONIGHT AS PWAT VALUES APPROACH 1.5 INCHES...WILL
ISSUE A FLASH FLOOD WATCH FOR THESE AREAS THAT EXPERIENCED HEAVY
RAIN LAST NIGHT AND ARE EXPECTED TO GET ANOTHER ROUND THIS AFTERNOON
AND THIS EVENING.

WITH THE WARM FRONT TO THE NORTH OF THE CWA THIS MORNING...A WARM
START TO THE DAY AND SOME BREAKS IN THE CLOUDS EXPECTED THIS
MORNING...HIGH TEMPERATURES SHOULD ONCE AGAIN MAKE IT INTO THE 80S
ACROSS THE CWA.

LONG TERM...TONIGHT THROUGH TUESDAY

THUNDERSTORMS WILL LIKELY CONTINUE INTO THE EVENING AS THE OCCLUDED
FRONT NOW OVER EASTERN IOWA CONTINUES TO PUSH ACROSS SOUTHEAST
MICHIGAN DURING THE LATE AFTERNOON AND INTO LATE EVENING. THREAT FOR
SEVERE WEATHER WILL ALSO CONTINUE AS MODEST INSTABILITY AND GOOD
SHEAR REMAIN...ALONG WITH THE POTENTIAL FOR VERY HEAVY DOWNPOURS.

SOME CHANGES HAVE BEEN MADE TO THE FORECAST FOR THURSDAY AND
FRIDAY...WITH AN OVERALL RAISING OF POPS/SKY COVER AND LOWERING OF
TEMPERATURES. SURFACE/UPPER LOW WILL TRACK INTO NORTHERN LOWER
MICHIGAN ON THURSDAY...PUSHING A COLD FRONT ACROSS THE AREA. FRONTAL
FORCING COMBINED WITH CYCLONIC FLOW AND A VERY MOIST ENVIRONMENT
(GFS/NAM SOUNDINGS ARE FAIRLY SATURATED THROUGH A DEEP LAYER) SHOULD
ALLOW NUMEROUS SHOWERS TO DEVELOP DURING THE DAY UNDER CLOUDY SKIES.
LINGERING...BUT LIMITED...INSTABILITY UNDER THE LOW WILL ALSO
BRINGING THE POTENTIAL FOR A FEW THUNDERSTORMS TO DEVELOP. CYCLONIC
FLOW AND A FEW PASSING SHORTWAVES WILL KEEP CLOUDS AND CHANCES FOR
SHOWERS AROUND ON THURSDAY NIGHT. ALL MODELS NOW SHOW A FAIRLY
HEALTHY SHORTWAVE DROPPING DOWN INTO THE NORTHERN GREAT LAKES FRIDAY
INTO FRIDAY NIGHT. THIS SHOULD HELP PUSH ANOTHER COLD FRONT DOWN
ACROSS THE AREA...WHILE ALSO PROVIDING ANOTHER FOCUS FOR SHOWERS TO
DEVELOP DURING THE DAY. MAX TEMPERATURES THROUGH THIS PERIOD WILL BE
BELOW NORMAL...WITH HIGHS ONLY REACHING THE UPPER 60S TO LOW 70S ON
THURSDAY...AND MID TO UPPER 60S BEHIND THE FRONT ON FRIDAY. UPPER
TROUGH AND AREA OF SURFACE LOW PRESSURE WILL MOVE EAST FRIDAY
NIGHT...WHICH SHOULD FINALLY USHER DRIER WEATHER INTO THE AREA.

MEDIUM RANGE MODELS CONTINUE TO ADVERTISE HIGH PRESSURE BUILDING IN
ON SATURDAY AND HOLDING OVERHEAD INTO MONDAY NIGHT. 00Z GFS BROUGHT
A SHORTWAVE DOWN ACROSS THE AREA ON SATURDAY...GENERATING QPF...BUT
IS AN OUTLIER WHEN COMPARED TO THE OTHER MODELS AND THIS SOLUTION
WAS DISCOUNTED. TEMPERATURES WILL SLOWLY MODERATE OVER THE WEEKEND
AND INTO MONDAY...WITH HIGH BACK UP AROUND 80 BY MONDAY. A WEAK LOW
PRESSURE SYSTEM LOOKS TO APPROACH THE AREA FOR EITHER TUESDAY OR
WEDNESDAY PER LATEST MODEL CONSENSUS. KEPT INHERITED DRY FORECAST
FOR NOW AS EURO HAS REALLY BACKED OFF ON DEGREE OF UPPER TROUGHING
OVER NORTHERN CANADA...WHICH WAS THE SYSTEM THAT STEERED THE WEAK
WAVE INTO THE GREAT LAKES IN PREVIOUS MODEL SOLUTIONS.

MARINE...

GUSTY EASTERLY WINDS TO 15-20 KTS WILL CONTINUE THIS MORNING AS A
WARM FRONT LIFTS NORTHWARD INTO THE CENTRAL GREAT LAKES. WINDS
SHOULD EASE A BIT AND TURN MORE SOUTHERLY THIS AFTERNOON AND TONIGHT
AS THE WARM FRONT LIFTS TO THE NORTH. SEVERAL ROUNDS OF SHOWERS AND
THUNDERSTORMS ARE EXPECTED TODAY AND TONIGHT AS THE WARM FRONT LIFTS
NORTH AND A COLD FRONT APPROACHES FROM THE WEST.

WINDS AND THUNDERSTORM CHANCES WILL DECREASE BEHIND THE FRONT LATE
THURSDAY INTO FRIDAY. ALTHOUGH TEMPERATURES WILL BE
COOLER...FAVORABLE BOATING CONDITIONS WILL EXIST OVER THE CENTRAL
GREAT LAKES THIS WEEKEND.

&&

.DTX WATCHES/WARNINGS/ADVISORIES...
MI...FLASH FLOOD WATCH...MIZ047-MIZ048-MIZ049-MIZ053-MIZ054-MIZ055-
     MIZ060-MIZ061-MIZ062-MIZ063...FROM 2 PM WEDNESDAY TO 2 AM
     THURSDAY.

LAKE HURON...NONE.

LAKE ST CLAIR...NONE.
MI WATERS OF LAKE ERIE...NONE.

&&

UPDATE...KEC
AVIATION.....KURIMSKI
SHORT TERM...KURIMSKI
LONG TERM....HLO
MARINE.......KURIMSKI

YOU CAN OBTAIN YOUR LATEST NATIONAL WEATHER SERVICE FORECASTS ONLINE
AT WWW.WEATHER.GOV/DETROIT (ALL LOWER CASE).

Hazardous weather outlook, Jun 22, 11:02 AM EST, 1 hour 58 minutes before

HAZARDOUS WEATHER OUTLOOK
NATIONAL WEATHER SERVICE DETROIT/PONTIAC MI
1202 PM EDT WED JUN 22 2011

MIZ047>049-053>055-060>063-230900-
MIDLAND-BAY-HURON-SAGINAW-TUSCOLA-SANILAC-SHIAWASSEE-GENESEE-LAPEER-
ST. CLAIR-
1202 PM EDT WED JUN 22 2011

THIS HAZARDOUS WEATHER OUTLOOK IS FOR PORTIONS OF SOUTHEAST
MICHIGAN.

.DAY ONE...TODAY AND TONIGHT

THUNDERSTORMS ARE LIKELY TODAY AND TONIGHT...ESPECIALLY DURING THE
AFTERNOON AND EVENING. THERE IS A SLIGHT RISK OF SEVERE WEATHER WITH
STORMS THAT DEVELOP THIS AFTERNOON AND EVENING. THE PRIMARY THREATS
FROM THESE THUNDERSTORMS WILL BE DAMAGING WIND GUSTS TO 70 MPH...HAIL
UP TO ONE INCH IN DIAMETER...ISOLATED TORNADOES...AND EXTREMELY
HEAVY RAINFALL. THUNDERSTORMS WILL MOVE TO THE NORTHEAST AT 40 MPH.
THE PRIMARY WINDOW FOR STRONG THUNDERSTORMS TODAY WILL BE FROM 2 TO
6 PM.

A FLASH FLOOD WATCH IS ALSO IN EFFECT FROM 2 PM THIS AFTERNOON
UNTIL 2 AM TONIGHT FOR COUNTIES ALONG AND NORTH OF INTERSTATE 69.

.DAYS TWO THROUGH SEVEN...THURSDAY THROUGH TUESDAY

THERE IS A CHANCE OF THUNDERSTORMS ON THURSDAY.

.SPOTTER INFORMATION STATEMENT...DISPATCHERS PLEASE NOTIFY YOUR
EMERGENCY MANAGERS IMMEDIATELY. SPOTTER ACTIVATION MAY BE NEEDED
THIS AFTERNOON AND EVENING.

MIZ068>070-075-076-082-083-230900-
LIVINGSTON-OAKLAND-MACOMB-WASHTENAW-WAYNE-LENAWEE-MONROE-
1202 PM EDT WED JUN 22 2011

THIS HAZARDOUS WEATHER OUTLOOK IS FOR PORTIONS OF SOUTHEAST
MICHIGAN.

.DAY ONE...TODAY AND TONIGHT

THUNDERSTORMS ARE LIKELY TODAY AND TONIGHT...ESPECIALLY DURING THE
AFTERNOON AND EVENING. THERE IS A SLIGHT RISK OF SEVERE WEATHER WITH
STORMS THAT DEVELOP THIS AFTERNOON AND EVENING. THE PRIMARY THREATS
FROM THESE THUNDERSTORMS WILL BE DAMAGING WIND GUSTS TO 70 MPH...HAIL
UP TO ONE INCH IN DIAMETER...ISOLATED TORNADOES...AND EXTREMELY
HEAVY RAINFALL. THUNDERSTORMS WILL MOVE TO THE NORTHEAST AT 40 MPH.
THE PRIMARY WINDOW FOR STRONG THUNDERSTORMS TODAY WILL BE FROM 2 TO
6 PM.

.DAYS TWO THROUGH SEVEN...THURSDAY THROUGH TUESDAY

THERE IS A CHANCE OF THUNDERSTORMS ON THURSDAY.

.SPOTTER INFORMATION STATEMENT...DISPATCHERS PLEASE NOTIFY YOUR
EMERGENCY MANAGERS IMMEDIATELY. SPOTTER ACTIVATION MAY BE NEEDED
THIS AFTERNOON AND EVENING.

LCZ422-423-460-LEZ444-LHZ421-422-441>443-462>464-230900-
ST. CLAIR RIVER-DETROIT RIVER-LAKE ST. CLAIR-
MICHIGAN WATERS OF LAKE ERIE FROM DETROIT RIVER TO NORTH CAPE MI-
OUTER SAGINAW BAY SW OF ALABASTER TO PORT AUSTIN MI TO INNER SAGINAW
BAY-INNER SAGINAW BAY SW OF POINT AU GRES TO BAY PORT MI-
PORT AUSTIN TO HARBOR BEACH MI-HARBOR BEACH TO PORT SANILAC MI-
PORT SANILAC TO PORT HURON MI-
LAKE HURON FROM PORT AUSTIN TO HARBOR BEACH BEYOND 5NM OFF SHORE-
LAKE HURON FROM HARBOR BEACH TO PORT SANILAC BEYOND 5NM OFF SHORE-
LAKE HURON FROM PORT SANILAC TO PORT HURON BEYOND 5NM OFF SHORE-
1202 PM EDT WED JUN 22 2011

THIS HAZARDOUS WEATHER OUTLOOK IS FOR PORTIONS OF LAKE ERIE...LAKE
HURON AND LAKE ST CLAIR.

.DAY ONE...TODAY AND TONIGHT

THUNDERSTORMS ARE LIKELY TODAY AND TONIGHT...ESPECIALLY DURING THE
AFTERNOON AND EVENING. THERE IS A SLIGHT RISK OF SEVERE WEATHER WITH
STORMS THAT DEVELOP THIS AFTERNOON AND EVENING. THE PRIMARY THREATS
FROM THESE THUNDERSTORMS WILL BE DAMAGING WIND GUSTS TO 50
KNOTS...HAIL UP TO ONE INCH IN DIAMETER...ISOLATED WATERSPOUTS AND
EXTREMELY HEAVY RAINFALL. THUNDERSTORMS WILL MOVE TO THE NORTHEAST
AT 35 TO 40 KNOTS. THE MAIN TIME FRAME FOR STRONG THUNDERSTORMS WILL
BE FROM 2 TO 9 PM

.DAYS TWO THROUGH SEVEN...THURSDAY THROUGH TUESDAY

THERE IS A CHANCE OF THUNDERSTORMS ON THURSDAY.

.SPOTTER INFORMATION STATEMENT...DISPATCHERS PLEASE NOTIFY YOUR
EMERGENCY MANAGERS IMMEDIATELY. SPOTTER ACTIVATION MAY BE NEEDED
THIS AFTERNOON AND EVENING.

LHZ361>363-230900-
LAKE HURON FROM 5NM EAST OF MACKINAC BRIDGE TO PRESQUE ISLE LT
BEYOND 5 NM OFF SHORE-
LAKE HURON FROM PRESQUE ISLE LIGHT TO STURGEON POINT MI BEYOND 5NM
OFF SHORE-
LAKE HURON FROM STURGEON POINT TO ALABASTER MI BEYOND 5NM OFF SHORE-
1202 PM EDT WED JUN 22 2011

THIS HAZARDOUS WEATHER OUTLOOK IS FOR PORTIONS OF LAKE HURON.

.DAY ONE...TODAY AND TONIGHT

THUNDERSTORMS ARE LIKELY TODAY AND TONIGHT...ESPECIALLY DURING THE
AFTERNOON AND EVENING. THERE IS A SLIGHT RISK OF SEVERE WEATHER WITH
STORMS THAT DEVELOP THIS AFTERNOON AND EVENING. THE PRIMARY THREATS
FROM THESE THUNDERSTORMS WILL BE DAMAGING WIND GUSTS TO 50
KNOTS...HAIL UP TO ONE INCH IN DIAMETER...AND EXTREMELY HEAVY
RAINFALL. THUNDERSTORMS WILL MOVE TO THE NORTHEAST AT 35 TO 40 KNOTS.

.DAYS TWO THROUGH SEVEN...THURSDAY THROUGH TUESDAY

THERE IS A CHANCE OF THUNDERSTORMS ON THURSDAY.

.SPOTTER INFORMATION STATEMENT...SPOTTER ACTIVATION WILL NOT BE
NEEDED TODAY AND TONIGHT.

HLO/KEC

YOU CAN OBTAIN YOUR LATEST NATIONAL WEATHER SERVICE FORECASTS ONLINE
AT WWW.WEATHER.GOV/DETROIT (ALL LOWER CASE).

In the hours before

Local storm report, Jun 22, 7:13 AM EST, 5 hours 47 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE DETROIT/PONTIAC MI
813 AM EDT WED JUN 22 2011

..TIME...   ...EVENT...      ...CITY LOCATION...     ...LAT.LON...
..DATE...   ....MAG....      ..COUNTY LOCATION..ST.. ...SOURCE....
            ..REMARKS..

1000 PM     TSTM WND DMG     NW HARTLAND             42.66N 83.76W
06/21/2011                   LIVINGSTON         MI   NWS EMPLOYEE

            18 INCH TREE DOWN ALONG WITH SEVERAL OTHER TREES AND
            SMALL BRANCHES.

&&

MOSTEIKO

Local storm report, Jun 22, 7:14 AM EST, 5 hours 46 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE DETROIT/PONTIAC MI
814 AM EDT WED JUN 22 2011

..TIME...   ...EVENT...      ...CITY LOCATION...     ...LAT.LON...
..DATE...   ....MAG....      ..COUNTY LOCATION..ST.. ...SOURCE....
            ..REMARKS..

0800 AM     HEAVY RAIN       MARLETTE                43.33N 83.08W
06/22/2011  M1.20 INCH       SANILAC            MI   TRAINED SPOTTER

            24 HOUR TOTAL.

&&

MOSTEIKO

Local storm report, Jun 22, 8:14 AM EST, 4 hours 46 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE DETROIT/PONTIAC MI
914 AM EDT WED JUN 22 2011

..TIME...   ...EVENT...      ...CITY LOCATION...     ...LAT.LON...
..DATE...   ....MAG....      ..COUNTY LOCATION..ST.. ...SOURCE....
            ..REMARKS..

1115 PM     TSTM WND DMG     BAD AXE                 43.80N 83.00W
06/21/2011                   HURON              MI   TRAINED SPOTTER

            LARGE TREE FELL AND CAUSED DAMAGE TO GARAGE AND HOME

&&

MOSTEIKO

Local storm report, Jun 22, 11:36 AM EST, 1 hour 24 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE DETROIT/PONTIAC MI
1236 PM EDT WED JUN 22 2011

..TIME...   ...EVENT...      ...CITY LOCATION...     ...LAT.LON...
..DATE...   ....MAG....      ..COUNTY LOCATION..ST.. ...SOURCE....
            ..REMARKS..

1201 AM     HEAVY RAIN       MIDLAND                 43.62N 84.23W
06/22/2011  M2.61 INCH       MIDLAND            MI   CO-OP OBSERVER

            24 HOUR TOTAL.

1201 AM     HEAVY RAIN       5 W SAGINAW             43.42N 84.05W
06/22/2011  M1.28 INCH       SAGINAW            MI   CO-OP OBSERVER

            24 HOUR TOTAL.

1201 AM     HEAVY RAIN       MOUNT CLEMENS           42.60N 82.88W
06/22/2011  M2.46 INCH       MACOMB             MI   CO-OP OBSERVER

            24 HOUR TOTAL AT SELFRIDGE.

1201 AM     HEAVY RAIN       MILFORD                 42.59N 83.60W
06/22/2011  M1.50 INCH       OAKLAND            MI   CO-OP OBSERVER

            24 HOUR TOTAL.

0600 AM     HEAVY RAIN       CORUNNA                 42.98N 84.12W
06/22/2011  M1.50 INCH       SHIAWASSEE         MI   CO-OP OBSERVER

            24 HOUR TOTAL.

0630 AM     HEAVY RAIN       AUBURN                  43.60N 84.08W
06/22/2011  M1.78 INCH       BAY                MI   CO-OP OBSERVER

            24 HOUR TOTAL.

0700 AM     HEAVY RAIN       5 W ST. CLAIR           42.82N 82.59W
06/22/2011  M1.35 INCH       ST. CLAIR          MI   COCORAHS

            24 HOUR TOTAL.

0700 AM     HEAVY RAIN       EASTPOINTE              42.47N 82.96W
06/22/2011  M1.57 INCH       MACOMB             MI   CO-OP OBSERVER

            24 HOUR TOTAL.

0700 AM     HEAVY RAIN       YALE                    43.13N 82.80W
06/22/2011  M1.78 INCH       ST. CLAIR          MI   CO-OP OBSERVER

            24 HOUR TOTAL.

0700 AM     HEAVY RAIN       OWOSSO                  43.00N 84.18W
06/22/2011  M2.71 INCH       SHIAWASSEE         MI   CO-OP OBSERVER

            24 HOUR TOTAL.

0700 AM     HEAVY RAIN       VASSAR                  43.37N 83.58W
06/22/2011  M1.17 INCH       TUSCOLA            MI   CO-OP OBSERVER

            24 HOUR TOTAL.

0700 AM     HEAVY RAIN       CASEVILLE               43.94N 83.27W
06/22/2011  M1.16 INCH       HURON              MI   CO-OP OBSERVER

            24 HOUR TOTAL.

0700 AM     HEAVY RAIN       NEW BALTIMORE           42.68N 82.74W
06/22/2011  M1.13 INCH       MACOMB             MI   COCORAHS

            24 HOUR TOTAL.

0715 AM     HEAVY RAIN       LEXINGTON               43.27N 82.53W
06/22/2011  M1.70 INCH       SANILAC            MI   CO-OP OBSERVER

            24 HOUR TOTAL.

0730 AM     HEAVY RAIN       CHESANING               43.18N 84.12W
06/22/2011  M1.23 INCH       SAGINAW            MI   CO-OP OBSERVER

            24 HOUR TOTAL.

0730 AM     HEAVY RAIN       2 E MERRILL             43.41N 84.30W
06/22/2011  M1.15 INCH       SAGINAW            MI   CO-OP OBSERVER

            24 HOUR TOTAL.

0800 AM     HEAVY RAIN       GROSSE POINTE FARMS     42.40N 82.89W
06/22/2011  M1.04 INCH       WAYNE              MI   CO-OP OBSERVER

            24 HOUR TOTAL.

0800 AM     HEAVY RAIN       4 NNW RICHMOND          42.86N 82.78W
06/22/2011  M0.00 INCH       MACOMB             MI   CO-OP OBSERVER

            24 HOUR TOTAL.

&&

MOSTEIKO

Special weather statement, Jun 22, 12:29 PM EST, 31 minutes before

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE DETROIT/PONTIAC MI
129 PM EDT WED JUN 22 2011

MIZ047-048-053-060-221830-
BAY-MIDLAND-SAGINAW-SHIAWASSEE-
129 PM EDT WED JUN 22 2011

...SIGNIFICANT WEATHER ADVISORY...

AT 124 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED
STRONG THUNDERSTORMS ALONG A LINE EXTENDING FROM 9 MILES WEST OF
COLEMAN TO 15 MILES NORTHWEST OF ST. CHARLES TO 10 MILES WEST OF
OWOSSO...MOVING NORTHEAST AT 35 MPH.

WINDS GREATER NEAR 50 MPH...AND HEAVY DOWNPOURS...ARE EXPECTED WITH
THESE STORMS...WITH POTENTIAL INCREASE IN STRENGTH.

* THUNDERSTORMS WILL BE NEAR...
  OWOSSO BY 135 PM EDT...
  COLEMAN BY 140 PM EDT...
  SANFORD AND HENDERSON BY 145 PM EDT...
  ST. CHARLES AND OAKLEY BY 150 PM EDT...
  FREELAND AND EDENVILLE BY 155 PM EDT...
  NEW LOTHROP AND AUBURN BY 200 PM EDT...
  SAGINAW AND LINWOOD BY 215 PM EDT...

GUSTY WINDS MAY CAUSE SMALL OBJECTS SUCH AS TRASH BINS TO BLOW
AROUND. SEEK SHELTER IN A STURDY STRUCTURE UNTIL THESE STORMS HAVE
PASSED.

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The radar

The Detroit radar (KDTX), 103 km away, was scanning. The volume nearest the first event began at 18:01 UTC.

Open the radar archive at this moment

Event by event

25 thunderstorm wind, 11 hail, 1 flood, 1 lightning. Local standard time, as filed.

Thunderstorm Wind, Lenawee

When: June 22, 1:00 PM EST
Where: Lenawee County, 2.31 mi SSW of Cement City
Measured: 50 kt (58 mph) estimated gust
Reported by: Broadcast Media
Coordinates: 42.040, -84.350

Tree limbs reported down.

Hail, Shiawassee

When: June 22, 1:20 PM EST
Where: Shiawassee County, 0.69 mi S of Laingsburg
Measured: 0.88 in hail
Reported by: Broadcast Media
Coordinates: 42.890, -84.350

Thunderstorm Wind, Saginaw

When: June 22, 1:25 PM EST
Where: Saginaw County, 1.47 mi SSE of Saginaw
Measured: 54 kt (62 mph) estimated gust
Property damage: $2,000
Reported by: Trained Spotter
Coordinates: 43.400, -83.960

Numerous six to eight inch diameter trees reported down.

Hail, Saginaw

When: June 22, 1:25 PM EST
Where: Saginaw County, 1.47 mi SSE of Saginaw
Measured: 0.88 in hail
Reported by: Trained Spotter
Coordinates: 43.400, -83.960

Thunderstorm Wind, Saginaw

When: June 22, 1:30 PM EST
Where: Saginaw County, 2.3 mi SSE of Saginaw
Measured: 56 kt (64 mph) estimated gust
Reported by: Trained Spotter
Coordinates: 43.390, -83.950

Two large trees reported down.

Hail, Saginaw

When: June 22, 1:30 PM EST
Where: Saginaw County, 1.47 mi SSE of Saginaw
Measured: 1 in hail
Reported by: SHAVE Project
Coordinates: 43.400, -83.960

Hail, Saginaw

When: June 22, 1:30 PM EST
Where: Saginaw County, 2.12 mi ENE of Bridgeport
Measured: 0.88 in hail
Reported by: SHAVE Project
Coordinates: 43.380, -83.860

Thunderstorm Wind, Shiawassee

When: June 22, 1:38 PM EST
Where: Shiawassee County, 0.69 mi N of Byron
Measured: 54 kt (62 mph) estimated gust
Reported by: Broadcast Media
Coordinates: 42.830, -83.950

A large tree was reported blown down.

Thunderstorm Wind, Bay

When: June 22, 1:45 PM EST
Where: Bay County, 5.42 mi ESE of Bay City Muni Arpt
Measured: 53 kt (61 mph) estimated gust
Reported by: Broadcast Media
Coordinates: 43.520, -83.800

A large tree was uprooted.

Thunderstorm Wind, Genesee

When: June 22, 1:56 PM EST
Where: Genesee County, 2.05 mi SW of Swartz Creek
Measured: 61 kt (70 mph) estimated gust
Property damage: $20,000
Reported by: Trained Spotter
Coordinates: 42.930, -83.850

Many large trees blown down across roads and houses.

Hail, Genesee

When: June 22, 2:11 PM EST
Where: Genesee County, 0.86 mi SW of Flint
Measured: 0.75 in hail
Reported by: Trained Spotter
Coordinates: 43.020, -83.690

Thunderstorm Wind, Oakland

When: June 22, 2:20 PM EST
Where: Oakland County, 2.06 mi NW of Oxbow
Measured: 51 kt (59 mph) measured gust
Reported by: Official NWS Observations
Coordinates: 42.650, -83.500

Thunderstorm Wind, Huron

When: June 22, 2:34 PM EST
Where: Huron County, Sebewaing
Measured: 50 kt (58 mph) estimated gust
Reported by: Law Enforcement
Coordinates: 43.730, -83.450

Three to four inch diameter tree branches reported down.

Hail, Oakland

When: June 22, 2:36 PM EST
Where: Oakland County, 1.23 mi NW of Clarkston
Measured: 0.75 in hail
Reported by: Trained Spotter
Coordinates: 42.740, -83.420

Thunderstorm Wind, Tuscola

When: June 22, 2:43 PM EST
Where: Tuscola County, 1.5 mi E of Fairgrove
Measured: 52 kt (60 mph) estimated gust
Reported by: Trained Spotter
Coordinates: 43.520, -83.520

A trained spotter estimated a 60 mph thunderstorm wind gust. Small tree branches were blown down .

Thunderstorm Wind, Lapeer

When: June 22, 2:43 PM EST
Where: Lapeer County, 2.76 mi N of Hunters Creek
Measured: 61 kt (70 mph) estimated gust
Property damage: $10,000
Reported by: Trained Spotter
Coordinates: 43.020, -83.280

A barn roof was blown off, along with numerous trees blown down.

Hail, Macomb

When: June 22, 3:00 PM EST
Where: Macomb County, 0.51 mi W of Washington
Measured: 1.5 in hail
Reported by: Trained Spotter
Coordinates: 42.720, -83.040

Hail, Macomb

When: June 22, 3:15 PM EST
Where: Macomb County, 3.27 mi SW of Armada
Measured: 1 in hail
Reported by: Trained Spotter
Coordinates: 42.820, -82.920

Hail, Macomb

When: June 22, 3:20 PM EST
Where: Macomb County, 0.86 mi SW of Armada
Measured: 1.25 in hail
Reported by: Broadcast Media
Coordinates: 42.840, -82.880

Hail, Macomb

When: June 22, 3:37 PM EST
Where: Macomb County, Memphis
Measured: 1 in hail
Reported by: Law Enforcement
Coordinates: 42.900, -82.750

Thunderstorm Wind, Wayne

When: June 22, 3:40 PM EST
Where: Wayne County, 1.55 mi ENE of Highland Park
Measured: 56 kt (64 mph) estimated gust
Reported by: Broadcast Media
Coordinates: 42.412, -83.144

Several downed trees on the west side of Detroit.

Thunderstorm Wind, Genesee

When: June 22, 3:44 PM EST
Where: Genesee County, 2.14 mi WSW of Swartz Creek
Measured: 64 kt (74 mph) measured gust
Reported by: Amateur Radio
Coordinates: 42.940, -83.860

Thunderstorm Wind, Genesee

When: June 22, 3:45 PM EST
Where: Genesee County, 0.86 mi SW of Flint
Measured: 65 kt (75 mph) measured gust
Reported by: Trained Spotter
Coordinates: 43.020, -83.690

Thunderstorm Wind, Saginaw

When: June 22, 3:46 PM EST
Where: Saginaw County, 0.85 mi NE of Burt
Measured: 54 kt (62 mph) measured gust
Reported by: Trained Spotter
Coordinates: 43.240, -83.910

Thunderstorm Wind, Oakland

When: June 22, 3:46 PM EST
Where: Oakland County, 1.38 mi S of Berkley
Measured: 56 kt (64 mph) estimated gust
Property damage: $10,000
Reported by: Amateur Radio
Coordinates: 42.480, -83.170

A large tree fell onto a car.

Thunderstorm Wind, Genesee

When: June 22, 3:50 PM EST
Where: Genesee County, 1.22 mi SE of Elmcrest
Measured: 52 kt (60 mph) estimated gust
Reported by: Trained Spotter
Coordinates: 43.090, -83.650

Several large tree limbs reported down.

Thunderstorm Wind, Saginaw

When: June 22, 3:58 PM EST
Where: Saginaw County, 0.5 mi E of Frankenmuth
Measured: 52 kt (60 mph) estimated gust
Reported by: Amateur Radio
Coordinates: 43.330, -83.740

A large tree limb was blown down.

Thunderstorm Wind, Bay

When: June 22, 4:00 PM EST
Where: Bay County, 1.47 mi SSW of Bay City
Measured: 53 kt (61 mph) estimated gust
Reported by: Law Enforcement
Coordinates: 43.580, -83.890

Large tree limbs were reported blown down.

Thunderstorm Wind, Macomb

When: June 22, 4:10 PM EST
Where: Macomb County, 2.64 mi WNW of Mt Clemens
Measured: 56 kt (64 mph) estimated gust
Reported by: Trained Spotter
Coordinates: 42.590, -82.920

A trained spotter estimated 65 mph thunderstorm wind gust.

Thunderstorm Wind, Washtenaw

When: June 22, 4:20 PM EST
Where: Washtenaw County, 0.69 mi N of Ypsilanti
Measured: 56 kt (64 mph) estimated gust
Property damage: $10,000
Reported by: Law Enforcement
Coordinates: 42.240, -83.620

A large tree was uprooted and fell onto a house.

Thunderstorm Wind, St. Clair

When: June 22, 4:24 PM EST
Where: St. Clair County, 1.01 mi W of Lakeport
Measured: 56 kt (64 mph) estimated gust
Property damage: $15,000
Reported by: Law Enforcement
Coordinates: 43.120, -82.500

Trees and powerlines reported down.

Thunderstorm Wind, St. Clair

When: June 22, 4:25 PM EST
Where: St. Clair County, 1.22 mi SE of Port Huron Arpt
Measured: 65 kt (75 mph) estimated gust
Property damage: $12,000
Reported by: NWS Storm Survey
Coordinates: 43.010, -82.430

A NWS storm survey team determined the damage produced in Fort Gratiot was a result of straight line winds estimated up to 75 mph. The damage occured along a 200 yard section of Keewahdin road and included: a shed that was blown over, a car which was moved in a parking lot, two wooden powerline poles that were partially snapped and downed tree limbs from two hardwood trees.

Hail, St. Clair

When: June 22, 4:25 PM EST
Where: St. Clair County, 0.86 mi NW of Gardendale
Measured: 1.75 in hail
Reported by: Public
Coordinates: 43.040, -82.490

Thunderstorm Wind, Lapeer

When: June 22, 4:40 PM EST
Where: Lapeer County, 4 mi NNW of Almont
Measured: 54 kt (62 mph) estimated gust
Reported by: Trained Spotter
Coordinates: 42.974, -83.060

Small trees were reported blown down.

Flood, St. Clair

When: June 22, 5:00 PM EST to June 23, 2:00 PM EST
Where: St. Clair County, 2.84 mi ENE of Yale to 3.92 mi NNE of Thornton
Cause: Heavy Rain
Property damage: $50,000
Reported by: Law Enforcement
Coordinates: 43.144, -82.727

Central dispatch reported numerous roads closed and washed out. There was a substantial amount of flooding in Burtchville, Fort Gratiot, and the northeastern townships. Up to 100 homes received some form of flood damage, as the rain overwhelmed the drainage system.

Thunderstorm Wind, Macomb

When: June 22, 5:17 PM EST
Where: Macomb County, 0.51 mi W of Meade
Measured: 52 kt (60 mph) estimated gust
Reported by: Law Enforcement
Coordinates: 42.720, -82.880

A tree was reported blown down.

Thunderstorm Wind, Macomb

When: June 22, 5:30 PM EST
Where: Macomb County, 2.31 mi SSE of Mt Clemens
Measured: 54 kt (62 mph) estimated gust
Reported by: Law Enforcement
Coordinates: 42.550, -82.850

A tree was reported blown down.

Lightning, St. Clair

When: June 22, 5:54 PM EST
Where: St. Clair County, 0.35 mi N of Port Huron Arpt
Injuries: 1 direct, 0 indirect
Reported by: Fire Department/Rescue
Coordinates: 43.025, -82.451

A 30 year old woman was struck by lighting as she tried to enter her automobile. She become unconscious and was not breathing. CPR was performed. She was transported to the hospital and did survive.

What these are

Thunderstorm Wind: Winds from a thunderstorm of 50 knots (58 mph) or more, or lower winds that caused damage or casualties. Measured gusts are marked MG, estimated EG.
Hail: Hail three-quarters of an inch or larger, or smaller hail that caused damage, filed with the largest stone measured.
Flood: Flooding that develops more slowly than a flash flood: rivers leaving their banks, or water standing over land for an extended time.
Lightning: A lightning strike that killed, injured or caused damage.

After NWS Directive 10-1605, the rules offices file Storm Data by.

The same day elsewhere

Every storm in Michigan in 2011 Every state in 2011 This day in weather history Warnings in Michigan, June 2011

Sources

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: 325816, 328182, 325817, 325856, 325818, 325854, 325857, 325829, 325836, 325819, 325859, 325820, 325832, 328185, 325821, 325822, 325814, 325860, 325815, 325813, 325868, 325823, 325826, 325825, 325827, 325882, 325828, 325831, 325824, 325838, 325833, 325840, 325885, 325886, 325889, 325835, 325834, 325914.