Alert archive / Michigan / Tornado Warnings in 2010

Tornado Warning 22, NWS Detroit, MI

August 19, 2010Macomb County, Oakland County, Michigan

NWS Detroit, MI issued this tornado warning at Aug 19, 2010, 7:04 PM EDT for Macomb County, Oakland County, Michigan. It was in force for 56 min. 17 reports came from inside the area while it was in force.

The area

The outline as issued, with what was reported inside it.

The facts

Issued: Aug 19, 2010, 7:04 PM EDT (23:04 UTC)
Expired: Aug 19, 2010, 8:00 PM EDT
In force: 56 min
Issued by: NWS Detroit, MI
Area: Storm-based polygon

Counties Macomb County, MI, Oakland County, MI

The radar

The Detroit radar (KDTX), 40 km from the middle of the area, began a volume at 23:07 UTC, the scan nearest the moment this went out.

Open the radar archive at this moment

The archived warnings, watches and discussions in force at that minute are drawn over the scan, this one among them.

What was reported inside it

Time	Report	Where	Remark
Aug 19, 7:07 PM EDT	TSTM WND DMG	Lake Orion, MI	8 TO 10 INCH DIAMETER LIMBS DOWNED
Aug 19, 7:25 PM EDT	TSTM WND DMG	3 S Romeo, MI	NUMEROUS TREE LIMBS UP TO 10 INCHES IN DIAMETER DOWNED ALONG VAN DYKE FROM 22 TO 25 MILE ROADS.
Aug 19, 7:25 PM EDT	TSTM WND DMG	Shelby Township, MI	NUMEROUS TREES DOWNED IN STONY CREEK PARK WITH BOATS IN DRY DOCK BLOWN OVER.
Aug 19, 7:25 PM EDT	NON-TSTM WND DMG	Shelby Township, MI	4 10 INCH DIAMETER TREES DOWNED BY ESTIMATED 60 MPH WINDS.
Aug 19, 7:27 PM EDT	TORNADO	3 Wsw Macomb Township, MI	A NATIONAL WEATHER SERVICE STORM SURVEY CONFIRMED AN EF1 TORNADO TOUCHED DOWN NEAR THE INTERSECTION OF 22 MILE ROAD AND HAYES ROAD. THE TORNADO...WITH WINDS ESTIMATED UP TO 90 MPH...TOUCHED DOWN AT 727 PM AND TRACKED NEARLY DUE SOUTH BEFORE LIFTING AT 733 PM J
Aug 19, 7:31 PM EDT	TSTM WND DMG	4 W Macomb Township, MI	NUMEROUS 15 INCH TREES DOWN
Aug 19, 7:31 PM EDT	TSTM WND DMG	5 N Sterling Heights, MI	TREES AND POWER LINES DOWN
Aug 19, 7:31 PM EDT	HAIL 0.75	5 Ese Rochester, MI
Aug 19, 7:32 PM EDT	TSTM WND GST 74	4 Wsw Macomb Township, MI
Aug 19, 7:32 PM EDT	HAIL 1	4 Wsw Macomb Township, MI
Aug 19, 7:35 PM EDT	HAIL 0.75	Sterling Heights, MI
Aug 19, 7:43 PM EDT	TORNADO	2 Sw Mount Clemens, MI	A NATIONAL WEATHER SERVICE STORM SURVEY CONFIRMED AN EF0 TORNADO TOUCHED DOWN ON GROESBECK HIGHWAY, A HALF MILE NORTH OF 16 MILE ROAD. THE TORNADO...WITH WINDS ESTIMATED UP TO 85 MPH...TOUCHED DOWN AT 743 PM AND TRACKED TO THE SOUTH-SOUTHEAST BEFORE LIFTING AT
Aug 19, 7:45 PM EDT	TSTM WND DMG	3 Ese Mount Clemens, MI	SEVERAL TREES DOWN
Aug 19, 7:45 PM EDT	TSTM WND DMG	4 Ene Rochester, MI	TREES AND POWER LINES DOWN NEAR AND ALONG 26 MILE BETWEEN MOUND AND VAN DYKE ROADS.
Aug 19, 7:45 PM EDT	TSTM WND DMG	Clinton Township, MI	NUMEROUS TREES DOWNED BETWEEN 8 AND 18 INCHES IN DIAMETER
Aug 19, 7:45 PM EDT	TSTM WND DMG	Mount Clemens, MI	SEVERAL LARGE TREES UP TO 18 INCHES IN DIAMETER DOWNED
Aug 19, 7:46 PM EDT	TSTM WND DMG	1 Ssw Mount Clemens, MI	TREE DIVIDED HOUSE IN HALF

Local storm reports filed while the alert was in force, from inside its polygon or its counties.

Did it verify

Verified. The Iowa Environmental Mesonet's Cow matched 2 storm reports to this tornado warning; the first came 23 minutes after it went out.

Cow counts a report within 15 km of the polygon while the warning was in force: a tornado for a tornado warning; hail of 1 inch or more, a gust of 58 mph or more or wind damage for a severe thunderstorm warning; a flash flood report for a flash flood warning.

The nearest sounding before it

Detroit, MI (KDTX), launched 12:00Z, 11.1 hours before the alert went out and 37 km from the middle of its area. This is the routine balloon launch nearest before it, the air the forecaster had in hand, not a measurement taken for the alert.

Skew-T log-p

Temperature in red, dew point in green, the mixed-layer parcel dashed.

Hodograph

The wind turning with height, colored by layer: ground to 1 km, 1 to 3 km, 3 to 6 km, 6 to 10 km.

Mixed-layer CAPE: 19 J/kg
Mixed-layer CIN: -64 J/kg
Mixed-layer LCL: 1282 m above ground
0-6 km bulk shear: 34 kt
0-1 km storm-relative helicity: 109 m²/s²
0-3 km storm-relative helicity: 118 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.3

Open this sounding in Storm Lab

The text

As transmitted, in the capitals the NWS used until 2016.

737 
WFUS53 KDTX 192304
TORDTX
MIC099-125-200000-
/O.NEW.KDTX.TO.W.0022.100819T2304Z-100820T0000Z/

BULLETIN - EAS ACTIVATION REQUESTED
TORNADO WARNING
NATIONAL WEATHER SERVICE DETROIT/PONTIAC MI
704 PM EDT THU AUG 19 2010

THE NATIONAL WEATHER SERVICE IN DETROIT/PONTIAC HAS ISSUED A

* TORNADO WARNING FOR...
  MACOMB COUNTY IN SOUTHEAST MICHIGAN...
  EASTERN OAKLAND COUNTY IN SOUTHEAST MICHIGAN...

* UNTIL 800 PM EDT

* AT 703 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
  SEVERE THUNDERSTORM CAPABLE OF PRODUCING A TORNADO. THIS DANGEROUS
  STORM WAS LOCATED NEAR OXFORD...AND MOVING SOUTHEAST AT 40 MPH.

* THIS DANGEROUS STORM WILL BE NEAR...
  STONEY CREEK METRO PARK AND ROCHESTER AROUND 715 PM EDT.
  WASHINGTON AROUND 720 PM EDT.
  SHELBY TOWNSHIP AND UTICA AROUND 725 PM EDT.
  MACOMB TOWNSHIP AND STERLING HEIGHTS AROUND 730 PM EDT.
  CLINTON TOWNSHIP AND MOUNT CLEMENS AROUND 735 PM EDT.

THE WARNING INCLUDES AREAS SURROUNDING THESE LOCATIONS...
  TROY...               STERLING HEIGHTS...   ROMEO...
  ROCHESTER...          PONTIAC...            OXFORD...
  MOUNT CLEMENS...      MACOMB TOWNSHIP...    BIRMINGHAM...
  ARMADA...

PRECAUTIONARY/PREPAREDNESS ACTIONS...

TAKE COVER NOW. MOVE TO AN INTERIOR ROOM ON THE LOWEST FLOOR OF A
STURDY BUILDING. AVOID WINDOWS. IF IN A MOBILE HOME...A VEHICLE OR
OUTDOORS...MOVE TO THE CLOSEST SUBSTANTIAL SHELTER AND PROTECT
YOURSELF FROM FLYING DEBRIS.

&&

LAT...LON 4256 8278 4254 8331 4278 8336 4289 8328
      4289 8288 4264 8281 4262 8281 4261 8280
TIME...MOT...LOC 2304Z 314DEG 34KT 4280 8320

$$

2 follow-up statements

611 
WWUS53 KDTX 192317
SVSDTX

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE DETROIT/PONTIAC MI
717 PM EDT THU AUG 19 2010

MIC099-125-200000-
/O.CON.KDTX.TO.W.0022.000000T0000Z-100820T0000Z/
MACOMB MI-OAKLAND MI-
717 PM EDT THU AUG 19 2010

...A TORNADO WARNING REMAINS IN EFFECT FOR NORTHEASTERN OAKLAND AND
MACOMB COUNTIES UNTIL 800 PM EDT...

AT 715 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
SEVERE THUNDERSTORM CAPABLE OF PRODUCING A TORNADO.  THIS DANGEROUS
STORM WAS LOCATED 5 MILES NORTH OF ROCHESTER...OR 6 MILES SOUTHWEST
OF ROMEO...MOVING SOUTHEAST AT 35 MPH.

THIS DANGEROUS STORM WILL BE NEAR...
  WASHINGTON AROUND 725 PM EDT.
  SHELBY TOWNSHIP AND UTICA AROUND 730 PM EDT.
  RAY CENTER AROUND 735 PM EDT.
  MACOMB TOWNSHIP AROUND 740 PM EDT.
  MOUNT CLEMENS AND CLINTON TOWNSHIP AROUND 745 PM EDT.

THE WARNING INCLUDES AREAS SURROUNDING THESE LOCATIONS...
  TROY...               STERLING HEIGHTS...   ROMEO...
  ROCHESTER...          MOUNT CLEMENS...      MACOMB TOWNSHIP...
  ARMADA...

PRECAUTIONARY/PREPAREDNESS ACTIONS...

TAKE COVER NOW. MOVE TO AN INTERIOR ROOM ON THE LOWEST FLOOR OF A
STURDY BUILDING. AVOID WINDOWS. IF IN A MOBILE HOME...A VEHICLE OR
OUTDOORS...MOVE TO THE CLOSEST SUBSTANTIAL SHELTER AND PROTECT
YOURSELF FROM FLYING DEBRIS.

&&

LAT...LON 4256 8278 4256 8327 4275 8321 4287 8310
      4289 8288 4264 8281 4262 8281 4261 8280
TIME...MOT...LOC 2317Z 298DEG 25KT 4275 8309

$$


SF

574 
WWUS53 KDTX 192329
SVSDTX

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE DETROIT/PONTIAC MI
729 PM EDT THU AUG 19 2010

MIC125-192339-
/O.CAN.KDTX.TO.W.0022.000000T0000Z-100820T0000Z/
OAKLAND MI-
729 PM EDT THU AUG 19 2010

...THE TORNADO WARNING FOR NORTHEASTERN OAKLAND COUNTY IS
CANCELLED...

THE STORM WHICH PROMPTED THE WARNING HAS MOVED OUT OF OAKLAND COUNTY.

LAT...LON 4256 8283 4256 8284 4256 8309 4281 8310
      4282 8286 4264 8281 4262 8281 4261 8280
      4256 8278
TIME...MOT...LOC 2329Z 322DEG 41KT 4266 8298

$$

MIC099-200000-
/O.CON.KDTX.TO.W.0022.000000T0000Z-100820T0000Z/
MACOMB MI-
729 PM EDT THU AUG 19 2010

...A TORNADO WARNING REMAINS IN EFFECT FOR CENTRAL MACOMB COUNTY
UNTIL 800 PM EDT...

AT 727 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
SEVERE THUNDERSTORM CAPABLE OF PRODUCING A TORNADO.  THIS DANGEROUS
STORM WAS LOCATED NEAR MACOMB TOWNSHIP...OR 8 MILES NORTHWEST OF
MOUNT CLEMENS...MOVING SOUTHEAST AT 40 MPH.

THIS DANGEROUS STORM WILL BE NEAR...
  CLINTON TOWNSHIP AND STERLING HEIGHTS AROUND 735 PM EDT.
  MOUNT CLEMENS AROUND 740 PM EDT.

THE WARNING INCLUDES AREAS SURROUNDING THESE LOCATIONS...
  STERLING HEIGHTS...   ROMEO...              MOUNT CLEMENS...
  MACOMB TOWNSHIP...

PRECAUTIONARY/PREPAREDNESS ACTIONS...

TAKE COVER NOW. MOVE TO AN INTERIOR ROOM ON THE LOWEST FLOOR OF A
STURDY BUILDING. AVOID WINDOWS. IF IN A MOBILE HOME...A VEHICLE OR
OUTDOORS...MOVE TO THE CLOSEST SUBSTANTIAL SHELTER AND PROTECT
YOURSELF FROM FLYING DEBRIS.

&&

LAT...LON 4256 8283 4256 8284 4256 8309 4281 8310
      4282 8286 4264 8281 4262 8281 4261 8280
      4256 8278
TIME...MOT...LOC 2329Z 322DEG 37KT 4266 8298

$$


SF

What forecasters said that day

The local office's own words before this tornado warning went out, 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 this tornado warning went out at Aug 19, 3:58 PM EDT, 3 hours 6 minutes earlier.

Area forecast discussion, Aug 19, 3:58 PM EDT, 3 hours 6 minutes before

AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE DETROIT/PONTIAC MI
358 PM EDT THU AUG 19 2010

.SHORT TERM...THIS EVENING AND TONIGHT

TAIL END OF MAIN SHORTWAVE ENERGY...NOW POSITIONED ACROSS ONTARIO
AND QUEBEC...SUPPORTED THE MAINTENANCE OF SCATTERED THUNDERSTORM
ACTIVITY ALL DAY ACROSS PORTIONS OF CENTRAL LOWER MICHIGAN.
SATELLITE IMAGERY SUGGESTS THE BULK OF LARGE SCALE FORCING HAS
VACATED THE PREMISES...WITH MUCH OF THE BACKGROUND SUPPORT NOW
HANDED OVER TO THE FRONTAL CIRCULATION.

THE BELT OF THE COUPLED JET STRUCTURE IS IN PLACE OVERHEAD...AND IS
SUPPORTING 0-6KM BULK SHEAR IN EXCESS OF 40 KNOTS. BEHAVIOR OF CELLS
THIS AFTERNOON DEFINITELY SUPPORTS THAT AMOUNT OF SHEAR...WITH A
RATHER SURPRISING LONGEVITY TO THE DISCRETENESS. INSTABILITY REMAINS
THE MARGINAL COMPONENT...SBCAPES OF 1000-1200 J/KG AND MLCAPES SUB
1000 J/KG. THE CELL EARLIER ACROSS TUSCOLA COUNTY MADE IT TO SEVERE
LIMITS..WITH SUSPICION THAT DIURNAL HEATING PEAK PLAYED A FACTOR.
WITH THE LACK OF FORCING FOR ASCENT...THE COVERAGE OF SHOWERS AND
THUNDERSTORMS SHOULD REMAIN SCATTERED FOR THE REMAINDER OF THE
EVENT. THE SEVERE THREAT REMAINS RATHER LIMITED WITH MEAGER LAPSE
RATES OVERALL...WITH PERHAPS A WINDOW FOR ISOLATED SEVERE DURING THE
NEXT COUPLE OF HOURS. AN ADDITIONAL WEAK CYCLONIC VORTICITY
FILAMENT IS POISED TO SWEEP ACROSS SOUTHEASTERN MICHIGAN YET THIS
AFTERNOON/EARLY THIS EVENING. THEREFORE...THE CHANCE/SLIGHT CHANCE
OF SHOWERS AND THUNDERSTORMS CONTINUES FOR POINTS SOUTHWARD (BETWEEN
THE I 69 AND I 94 CORRIDORS) PRIOR TO 3-4Z. THE FRONTAL
PASSAGE/VEERING TO EASTERLIES THIS EVENING WILL QUICKLY END THE
THREAT FOR SHOWERS AND THUNDERSTORMS FOR THE REMAINDER OF THE NIGHT.

A VERY DRY AIRMASS BEHIND THE COLD FRONT WILL ALLOW LOWS TONIGHT TO
DIP INTO THE 50S ACROSS THE NORTH WITH LOWER 60S ACROSS THE SOUTH.

&&

.LONG TERM...

UPPER LEVEL TROUGH/JET ENERGY WILL COME OUT OF THE CENTRAL ROCKIES
AND MOVE THROUGH THE GREAT LAKES REGION DURING THE FIRST HALF OF THE
WEEKEND. GOOD MOISTURE PLUME/850-700 MB THETA-E RIDGE AHEAD OF THE
COLD FRONT SHOULD PROVIDE A HIGH CHANCE OF SHOWERS AND THUNDERSTORMS
ON SATURDAY. BEFORE WE GET THERE...WILL HAVE TO WATCH WARM FRONT
WHICH LIFTS NORTH THROUGH THE WESTERN GREAT LAKES TOMORROW.
HOWEVER...WITH UPPER LEVEL RIDGE IN PLACE OVER THE CENTRAL GREAT
LAKES...EXPECTING ACTIVITY TO REMAIN MAINLY CONFINED TO OUR
NORTHWEST WHERE THE BETTER DEFINED WARM FRONT WILL RESIDE...AS MAIN
SHORTWAVE LIFTS NORTHEAST INTO LAKE SUPERIOR. SURFACE WINDS OUT OF
THE SOUTHEAST SHOULD ALSO TAMPER OUR WARMUP AND INSTABILITY TO A
DEGREE...AND MAINTAINED THE LOW TO MID 80S FORECAST.

850 MB THERMAL RIDGE AXIS AROUND 20 C WOULD SUPPORT MAXES AROUND 90
DEGREES ON SATURDAY...BUT FORECAST WILL BANK ON HIGH SCATTERED
COVERAGE OF SHOWER/THUNDERSTORM ACTIVITY AND LIMITED INSOLATION
HOLDING MAXES IN PREDOMINATELY IN THE MID 80S.

LATEST GFS/EUROPEAN (12Z GFS) ADVERTISING THE UPPER LEVEL TROUGH
AXIS AND ASSOCIATED COLD FRONT/SURFACE LOW WILL CLEAR THE STATE BY
12Z SUNDAY...LEADING TO A WARM AND DRY SUNDAY. A LITTLE CONCERNED
THE SLOWING TREND MAY CONTINUE AS CLOSED 500 MB LOW SHOULD DEVELOP
OVER THE EASTERN GREAT LAKES...WITH NORTHERLY CYCLONIC FLOW AND
POSSIBLE SPOKE OF ENERGY COMING DOWN ON THE BACKSIDE OF THIS SYSTEM.
AT THIS POINT...DECIDED TO INCREASE SKY COVER ACROSS EASTERN AREAS.

STRONG HIGH PRESSURE LOOKS TO DOMINATE THE AREA NEXT WEEK WITH THE
EXCEPTION OF A BRIEF PERIOD IN THE TUESDAY/WEDNESDAY TIME FRAME.
DURING THAT TIME A DEEP SURFACE LOW UNDER A BROAD UPPER TROUGH WILL
TRACK ACROSS THE HUDSON BAY DROPPING A WEAKENING COLD FRONT DOWN
THROUGH THE REGION SOMETIME TUESDAY NIGHT. MODELS CONTINUE TO SHOW
LITTLE IN THE WAY OF MOISTURE WITH THIS FRONT...AND WITH THE FRONT
FORECAST TO PASS QUICKLY THOUGH THE AREA...WILL KEEP LOW CHANCE POPS
IN THE FORECAST. BETTER CHANCES FOR PRECIPITATION LOOK TO BE ACROSS
THE NORTHERN HALF OF LAKE HURON...BUT THERE IS A SLIGHT CHANCE FOR
PRECIP TO MAKE IT FURTHER SOUTH.

&&

.MARINE...

A COLD FRONT IS EXPECTED TO MOVE THROUGH SOUTHEASTERN MICHIGAN
TONIGHT STALLING NEAR THE OHIO BORDER TOWARDS MORNING. ALONG WITH
TRIGGERING SOME THUNDERSTORMS...THE PASSAGE OF THIS FRONT WILL ALSO
CAUSE THE WINDS TO SHARPLY VEER TO THE NORTH-NORTHEAST. THE WINDS
SHOULD ALSO BECOME RATHER GUSTY FOR A COUPLE OF HOURS FOLLOWING THE
FRONT AS COLD AIR ADVECTION CREATES AN UNSTABLE PROFILE OVER THE
LAKES. SURFACE HIGH PRESSURE WILL BUILD IN FROM THE NORTH TONIGHT
AND WILL QUICKLY DIMINISH THE WINDS DURING THE EVENING. WINDS WILL
BECOME SOUTHEASTERLY ON FRIDAY AND INCREASE IN SPEED FRI NIGHT INTO
SATURDAY IN ADVANCE OF LOW PRESSURE MOVING INTO THE REGION FROM THE
WEST. HIGH PRESSURE WILL THEN BRING LIGHTER WINDS BY SUNDAY THROUGH
EARLY NEXT WEEK.

&&

.AVIATION...ISSUED 130 PM EDT THU AUG 19 2010

THE COLD FRONT AT TAF ISSUANCE TIME IS DROPPING SOUTHWARD THROUGH
THE SAGINAW BAY REGION. AS EXPECTED...THE FRONT HAS PROVIDED A
FOCUS FOR SCATTERED SHOWER AND THUNDERSTORM ACTIVITY. OVERALL
TIMING OF FRONTAL PASSAGE AND THUNDERSTORM POTENTIAL FROM THE
EARLIER TAF FORECAST REMAINS SPOT ON AND WILL LEAVE AS IS. DESPITE
A DOWNTREND IN FORCING FOR THIS AFTERNOON...DECIDED ON INCLUDING A
TEMPO GROUP FOR TSRA AT THE DETROIT TERMINALS...AS EMBEDDED
SHORTWAVE ENERGY/MIDLEVEL MOISTURE IS POISED TO SWEEP ACROSS
SOUTHERN LOWER MICHIGAN LATER THIS AFTERNOON. VFR CONDITIONS ARE
EXPECTED TO CLOSE OUT THE TAF PERIOD.

&&

.DTX WATCHES/WARNINGS/ADVISORIES...
MI...NONE.
LAKE HURON...NONE.
LAKE ST CLAIR...NONE.
MI WATERS OF LAKE ERIE...NONE.

&&

SHORT TERM...CB
LONG TERM....SF/DRK
MARINE.......CB
AVIATION.....CB

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

Hazardous weather outlook, Aug 19, 5:08 PM EDT, 1 hour 56 minutes before

HAZARDOUS WEATHER OUTLOOK
NATIONAL WEATHER SERVICE DETROIT/PONTIAC MI
505 AM EDT THU AUG 19 2010

MIZ047>049-053>055-060>063-068>070-200830-
MIDLAND-BAY-HURON-SAGINAW-TUSCOLA-SANILAC-SHIAWASSEE-GENESEE-LAPEER-
ST. CLAIR-LIVINGSTON-OAKLAND-MACOMB-
505 AM EDT THU AUG 19 2010

THIS HAZARDOUS WEATHER OUTLOOK IS FOR THE NORTHERN DETROIT
SUBURBS...THE INTERSTATE 69 CORRIDOR...THE TRI CITIES AND THE THUMB.

.DAY ONE...TONIGHT

WIDELY SCATTERED THUNDERSTORMS CAN BE EXPECTED ALONG A WEAK COLD
FRONT THAT WILL DROP SOUTHEAST THROUGH THE AREA INTO THIS EVENING.
WHILE SEVERE WEATHER WILL NOT BE WIDESPREAD...ISOLATED WIND GUSTS TO
AROUND 60 MPH WILL BE POSSIBLE ALONG WITH LARGE HAIL TO NEAR ONE
INCH IN DIAMETER. STORM MOTION WILL BE SOUTHEAST AT 30 MPH. EXPECT
THIS ACTIVITY TO DIMINISH AFTER SUNSET AS DAYTIME HEATING IS LOST.

.DAYS TWO THROUGH SEVEN...FRIDAY THROUGH WEDNESDAY

THERE IS A CHANCE OF THUNDERSTORMS FROM LATE FRIDAY THROUGH
SATURDAY NIGHT AS A SLOW MOVING LOW PRESSURE SYSTEM APPROACHES
FROM THE WEST.

.SPOTTER INFORMATION STATEMENT...

SPOTTER ACTIVATION IS NOT ANTICIPATED AT THIS TIME AS THUNDERSTORM
ACTIVITY WILL REMAIN ISOLATED.

MIZ075-076-082-083-200830-
WASHTENAW-WAYNE-LENAWEE-MONROE-
505 AM EDT THU AUG 19 2010

THIS HAZARDOUS WEATHER OUTLOOK IS FOR WASHTENAW...WAYNE...LENAWEE
AND MONROE COUNTIES.

.DAY ONE...TONIGHT

THERE IS A SLIGHT CHANCE OF THUNDERSTORMS THIS EVENING AS A WEAK
COLD FRONT PROGRESSES THROUGH THE AREA. SEVERE WEATHER IS NOT
EXPECTED AT THIS TIME.

.DAYS TWO THROUGH SEVEN...FRIDAY THROUGH WEDNESDAY

THERE IS A CHANCE OF THUNDERSTORMS FROM LATE FRIDAY THROUGH
SATURDAY NIGHT AS A SLOW MOVING LOW PRESSURE SYSTEM APPROACHES
FROM THE WEST.

.SPOTTER INFORMATION STATEMENT...

SPOTTER ACTIVATION IS NOT ANTICIPATED AT THIS TIME.

LCZ422-423-460-LEZ444-LHZ361>363-421-422-441>443-462>464-200830-
ST. CLAIR RIVER-DETROIT RIVER-LAKE ST. CLAIR-
MICHIGAN WATERS OF LAKE ERIE FROM DETROIT RIVER TO NORTH CAPE MI-
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-
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-
505 AM EDT THU AUG 19 2010

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

.DAY ONE...TONIGHT

WIDELY SCATTERED THUNDERSTORMS ARE EXPECTED THIS EVENING. SEVERE
WEATHER IS NOT ANTICIPATED AT THIS TIME. HOWEVER...SOME STORMS WILL
BE CAPABLE OF PRODUCING WIND GUSTS TO 40 KNOTS AND HALF INCH
DIAMETER HAIL AS THEY TRACK TO THE SOUTHEAST AT 35 MPH. THESE
STORMS ARE ASSOCIATED WITH A COLD FRONT MOVING SOUTH ACROSS THE
REGION.

.DAYS TWO THROUGH SEVEN...FRIDAY THROUGH WEDNESDAY

THERE IS A CHANCE OF THUNDERSTORMS FROM LATE FRIDAY THROUGH
SATURDAY NIGHT AS A SLOW MOVING LOW PRESSURE SYSTEM APPROACHES
FROM THE WEST.

.SPOTTER INFORMATION STATEMENT...

SPOTTER ACTIVATION IS NOT ANTICIPATED AT THIS TIME.

SC/DG

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

In the hours before

Special weather statement, Aug 19, 4:23 PM EDT, 2 hours 41 minutes before

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE DETROIT/PONTIAC MI
423 PM EDT THU AUG 19 2010

MIZ063-192045-
ST. CLAIR-
423 PM EDT THU AUG 19 2010

...SIGNIFICANT WEATHER ADVISORY...

AT 419 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
STRONG THUNDERSTORM 8 MILES WEST OF PORT HURON...MOVING SOUTHEAST AT
30 MPH.

ONE HALF INCH DIAMETER HAIL...WINDS UP TO 50 MPH...BRIEF HEAVY
DOWNPOURS...ARE POSSIBLE WITH THIS STORM.

* THE THUNDERSTORM WILL BE NEAR...
  MARYSVILLE AND PORT HURON BY 430 PM EDT...
  ST. CLAIR BY 435 PM EDT...

GUSTY WINDS MAY CAUSE SMALL BRANCHES TO BE BLOWN DOWN...AND LOOSE
OBJECTS TO BLOW AROUND. SEEK SHELTER IN A STURDY STRUCTURE UNTIL THIS
STORM HAS PASSED.

Special weather statement, Aug 19, 4:32 PM EDT, 2 hours 32 minutes before

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE DETROIT/PONTIAC MI
432 PM EDT THU AUG 19 2010

MIZ061-062-192045-
GENESEE-LAPEER-
432 PM EDT THU AUG 19 2010

...SIGNIFICANT WEATHER ADVISORY...

AT 431 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
STRONG THUNDERSTORM 10 MILES WEST OF COLUMBIAVILLE...MOVING EAST AT
30 MPH.

ONE HALF INCH DIAMETER HAIL...WINDS UP TO 50 MPH...BRIEF HEAVY
DOWNPOURS...ARE POSSIBLE WITH THIS STORM.

* THE THUNDERSTORM WILL BE NEAR...
  OTISVILLE AND OTTER LAKE BY 440 PM EDT...
  COLUMBIAVILLE BY 445 PM EDT...

GUSTY WINDS MAY CAUSE SMALL BRANCHES TO BE BLOWN DOWN...AND LOOSE
OBJECTS TO BLOW AROUND. SEEK SHELTER IN A STURDY STRUCTURE UNTIL THIS
STORM HAS PASSED.

Local storm report, Aug 19, 5:09 PM EDT, 1 hour 55 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE DETROIT/PONTIAC MI
509 PM EDT THU AUG 19 2010

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

0500 PM     HAIL             FREELAND                43.52N 84.12W
08/19/2010  M0.75 INCH       SAGINAW            MI   TRAINED SPOTTER

&&

RKULIK

Local storm report, Aug 19, 5:53 PM EDT, 1 hour 11 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE DETROIT/PONTIAC MI
553 PM EDT THU AUG 19 2010

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

0524 PM     TSTM WND DMG     1 SSE SAGINAW           43.40N 83.94W
08/19/2010                   SAGINAW            MI   COUNTY OFFICIAL

            POWERLINES DOWN AT PRESCOTT AND GALLAGHER

0524 PM     TSTM WND DMG     1 ESE SAGINAW           43.42N 83.93W
08/19/2010                   SAGINAW            MI   COUNTY OFFICIAL

            TREES DOWN ON ALGER

0528 PM     HAIL             5 NW FRANKENMUTH        43.38N 83.82W
08/19/2010  M1.75 INCH       SAGINAW            MI   COUNTY OFFICIAL

&&

RKULIK

Local storm report, Aug 19, 6:01 PM EDT, 1 hour 3 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE DETROIT/PONTIAC MI
601 PM EDT THU AUG 19 2010

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

0555 PM     HAIL             5 SE FRANKENMUTH        43.28N 83.68W
08/19/2010  M0.50 INCH       TUSCOLA            MI   TRAINED SPOTTER

&&

RKULIK

Local storm report, Aug 19, 6:17 PM EDT, 47 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE DETROIT/PONTIAC MI
617 PM EDT THU AUG 19 2010

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

0555 PM     HAIL             5 ESE FRANKENMUTH       43.29N 83.66W
08/19/2010  M0.75 INCH       TUSCOLA            MI   TRAINED SPOTTER

&&

RKULIK

The office that day

Everything else NWS Detroit, MI issued on the same UTC day.

Issued	Product	Office	Counties	Lasted
Aug 19, 2:24 PM EDT	Severe Thunderstorm Warning	DTX	Lapeer, Sanilac, Tuscola	66 min
Aug 19, 2:45 PM EDT	Special Marine Warning	DTX		2 hr
Aug 19, 3:26 PM EDT	Severe Thunderstorm Warning	DTX	Lapeer, Tuscola	40 min
Aug 19, 4:55 PM EDT	Severe Thunderstorm Warning	DTX	Bay, Midland, Saginaw	65 min
Aug 19, 5:19 PM EDT	Tornado Warning	DTX	Saginaw	41 min
Aug 19, 5:32 PM EDT	Severe Thunderstorm Warning	DTX	Tuscola	44 min
Aug 19, 5:46 PM EDT	Tornado Warning	DTX	Genesee, Saginaw, Tuscola	59 min
Aug 19, 6:24 PM EDT	Severe Thunderstorm Warning	DTX	Lapeer	47 min
Aug 19, 6:31 PM EDT	Severe Thunderstorm Warning	DTX	Genesee	29 min
Aug 19, 6:42 PM EDT	Severe Thunderstorm Warning	DTX	Oakland	48 min
Aug 19, 7:19 PM EDT	Special Marine Warning	DTX		55 min
Aug 19, 7:40 PM EDT	Tornado Warning	DTX	Macomb	20 min

Nearby

Tornado Warnings in Michigan, 2010 Every tornado warning in 2010 Tornadoes in 2010

Sources

The product and its follow-ups from the Iowa Environmental Mesonet's archive of National Weather Service and Storm Prediction Center text; local storm reports from the same archive; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.