Scattered thunderstorms possible this afternoon/evening; mild severe potential (July 18)

Very hot, humid air over southern lower MI is likely to contribute to some scattered thunderstorm development across the area this afternoon into the night. These storms will have the potential for heavy rainfall as they move east at 20-30mph, which could cause localized flooding. There is a slight chance of some storms becoming strong or severe, but that risk is most prevalent over the thumb region of the state; most of any storms that develop are expected to carry very little hail or damaging wind risk, and virtually no tornado potential.

Also keep in mind the heat advisory in effect today until 8pm tomorrow: drink plenty of water, do not leave children or pets in cars, and stay indoors as much as possible. (Heat advisory text from NWS Detroit)

It is impossible to predict specifically whether any storms will hit Ann Arbor. As those at the Townie Street Party saw Monday night,  it’s possible for the skies around downtown to look very ominous with thunderstorms, but for us to receive only a few drops of rain, especially with storms which are nearly stationary. Storms this afternoon will be similarly very localized.

Looking forward, we can expect Friday to start out the same: hot and humid. Thunderstorms are expected Friday and Friday night as a cold front comes south into the area, bringing slightly cooler temperatures for us. Friday’s storms will be strong, with some severe potential (damaging winds and large hail will be a risk across the area), and they are expected to bring torrential rainfall. Saturday will be a bit cooler, with some risk of thunderstorms.

Here’s today’s hazardous weather outlook:

HAZARDOUS WEATHER OUTLOOK
NATIONAL WEATHER SERVICE DETROIT/PONTIAC MI
431 AM EDT THU JUL 18 2013

MIZ047>049-053>055-060>063-068>070-075-076-082-083-190900-
MIDLAND-BAY-HURON-SAGINAW-TUSCOLA-SANILAC-SHIAWASSEE-GENESEE-LAPEER-
ST. CLAIR-LIVINGSTON-OAKLAND-MACOMB-WASHTENAW-WAYNE-LENAWEE-MONROE-
431 AM EDT THU JUL 18 2013

THIS HAZARDOUS WEATHER OUTLOOK IS FOR PORTIONS OF SOUTHEAST
MICHIGAN.

.DAY ONE...TODAY AND TONIGHT

A HEAT ADVISORY IS IN EFFECT TODAY AND TONIGHT AS HEAT INDEX
VALUES REACH OR EXCEED 100 DEGREES DURING THE DAY AND ONLY FALL
INTO THE UPPER 70S TONIGHT. PLEASE SEE THE LATEST FORECASTS AND
STATEMENTS FOR DETAILS.

SCATTERED THUNDERSTORMS ARE EXPECTED TO DEVELOP TODAY WITH A FEW
STORMS CONTINUING OVERNIGHT. A FEW STRONG TO SEVERE STORMS MAY DEVELOP...WITH
THE BEST POTENTIAL FOR SEVERE WEATHER OVER THE THUMB. STORMS WILL
ALSO BE CAPABLE OF VERY HEAVY RAINFALL AS THEY MOVE TO THE EAST AT
20 TO 30 MPH.

.DAYS TWO THROUGH SEVEN...FRIDAY THROUGH WEDNESDAY

A HEAT ADVISORY REMAINS IN EFFECT THROUGH FRIDAY. THE PROLONGED
PERIOD OF HOT DAYTIME TEMPERATURES AND WARM AND MUGGY NIGHTS WILL
INCREASE STRESS ON THE BODY.

THUNDERSTORMS ARE LIKELY FRIDAY AND FRIDAY NIGHT AS A COLD FRONT
DROPS SOUTH THROUGH THE AREA. THERE IS A CHANCE FOR SEVERE WEATHER
AND TORRENTIAL RAINFALL WITH THESE STORMS. THE THREAT FOR
THUNDERSTORMS WILL CONTINUE INTO SATURDAY...HOWEVER COVERAGE AND
INTENSITY WILL BE LESS.

.SPOTTER INFORMATION STATEMENT...

SPOTTER ACTIVATION WILL NOT BE NEEDED TODAY AND TONIGHT.

$$

And, for reference, the heat advisory text:

URGENT - WEATHER MESSAGE
NATIONAL WEATHER SERVICE DETROIT/PONTIAC MI
353 AM EDT THU JUL 18 2013

...HOT AND HUMID CONDITIONS PERSISTING THROUGH FRIDAY...

.A STRONG HIGH PRESSURE SYSTEM IS RESULTING IN AN EXTENDED
STRETCH OF HOT AND HUMID CONDITIONS. VERY HUMID CONDITIONS
COMBINED WITH TEMPERATURES RISING INTO THE MID 90S WILL RESULT IN
HEAT INDICIES AROUND 105 DEGREES THIS AFTERNOON. IN
ADDITION...OVERNIGHT RELIEF FROM THE HEAT WILL BE MINIMAL AS HUMID
CONDITIONS PERSIST AND LOWS HOLD IN THE UPPER 70S. SIMILAR
CONDITIONS ARE EXPECTED TOMORROW BEFORE A COLD FRONT PROVIDES
RELIEF FOR THE WEEKEND.

MIZ047>049-053>055-060>063-068>070-075-076-082-083-182015-
/O.CON.KDTX.HT.Y.0001.000000T0000Z-130720T0000Z/
MIDLAND-BAY-HURON-SAGINAW-TUSCOLA-SANILAC-SHIAWASSEE-GENESEE-
LAPEER-ST. CLAIR-LIVINGSTON-OAKLAND-MACOMB-WASHTENAW-WAYNE-
LENAWEE-MONROE-
INCLUDING THE CITIES OF...MIDLAND...BAY CITY...BAD AXE...
SAGINAW...CARO...SANDUSKY...OWOSSO...FLINT...LAPEER...
PORT HURON...HOWELL...PONTIAC...WARREN...ANN ARBOR...DETROIT...
ADRIAN...MONROE
353 AM EDT THU JUL 18 2013

...HEAT ADVISORY REMAINS IN EFFECT UNTIL 8 PM EDT FRIDAY...

HAZARDOUS WEATHER...

 * HIGH HUMIDITY AND MAX TEMPERATURES IN THE LOW TO MID 90S
   RESULTING IN HEAT INDICIES OF 95 TO 105 DEGREES THROUGH
   FRIDAY.

 * LITTLE OVERNIGHT RELIEF WITH HUMIDITY PERSISTING AND LOWS IN
   THE UPPER 70S.

IMPACTS...

 * HEAT EXHAUSTION OR HEAT STROKE IS POSSIBLE IN EXTREME CASES
   WHERE NO PROTECTIVE ACTION IS TAKEN.

 * MUSCLE CRAMPS AND SUN BURNS ARE ALSO POSSIBLE

PRECAUTIONARY/PREPAREDNESS ACTIONS...

 * A HEAT ADVISORY MEANS THAT A PERIOD OF HOT TEMPERATURES IS
   EXPECTED. THE COMBINATION OF HOT TEMPERATURES AND HIGH
   HUMIDITY WILL COMBINE TO CREATE A SITUATION IN WHICH HEAT
   ILLNESSES ARE POSSIBLE. DRINK PLENTY OF FLUIDS...STAY IN AN
   AIR-CONDITIONED ROOM...STAY OUT OF THE SUN...AND CHECK ON
   RELATIVES AND NEIGHBORS. CHILDREN AND PETS SHOULD NEVER BE
   LEFT UNATTENDED IN VEHICLES UNDER ANY CIRCUMSTANCES.

 * PREPARE...PLAN...AND STAY INFORMED. VISIT
   HTTP://GO.USA.GOV/RR8

&&

$$

Heat advisory extended through Friday 8pm

The heat and humidity is here to stay, at least until a cold front moves through the area Friday night. The NWS has extended our heat advisory to be effective until Friday 8pm.

Expect unusually hot, humid conditions until then, with heat indices above 100° and lows only in the 70s.

Remember:

  • Stay hydrated, especially if you’re outside for long periods of time; drink plenty of water, not pop, coffee, etc
  • Never leave children or pets in a car for any amount of time, for any reason
  • Wear sunscreen
  • Look out for symptoms of dehydration, heat exhaustion, and heat stroke
  • As much as possible, stay in air-conditioned buildings
  • As much as possible, avoid being in the sun
WWUS73 KDTX 171921
NPWDTX

URGENT - WEATHER MESSAGE
NATIONAL WEATHER SERVICE DETROIT/PONTIAC MI
321 PM EDT WED JUL 17 2013

...HOT AND HUMID CONDITIONS PERSISTING THROUGH FRIDAY...

.A STRONG HIGH PRESSURE SYSTEM IS RESULTING IN AN EXTENDED
STRETCH OF HOT AND HUMID CONDITIONS. VERY HUMID CONDITIONS
COMBINED WITH TEMPERATURES RISING INTO THE LOW TO MID 90S DURING THE
AFTERNOON HOURS WILL RESULT IN HEAT INDICIES OF 95 TO 105 DEGREES.
IN ADDITION...OVERNIGHT RELIEF FROM THE HEAT WILL BE MINIMAL AS
HUMID CONDITIONS PERSIST AND LOWS HOLD PREDOMINATELY IN THE MID
70S. A COLD FRONT MOVING THROUGH SOUTHEAST MICHIGAN FRIDAY
EVENING AND NIGHT WILL PROVIDE RELIEF FROM THE HEAT AS WE HEAD
INTO THE WEEEKEND.

MIZ047>049-053>055-060>063-068>070-075-076-082-083-180930-
/O.EXT.KDTX.HT.Y.0001.000000T0000Z-130720T0000Z/
MIDLAND-BAY-HURON-SAGINAW-TUSCOLA-SANILAC-SHIAWASSEE-GENESEE-
LAPEER-ST. CLAIR-LIVINGSTON-OAKLAND-MACOMB-WASHTENAW-WAYNE-
LENAWEE-MONROE-
INCLUDING THE CITIES OF...MIDLAND...BAY CITY...BAD AXE...
SAGINAW...CARO...SANDUSKY...OWOSSO...FLINT...LAPEER...
PORT HURON...HOWELL...PONTIAC...WARREN...ANN ARBOR...DETROIT...
ADRIAN...MONROE
321 PM EDT WED JUL 17 2013

...HEAT ADVISORY NOW IN EFFECT UNTIL 8 PM EDT FRIDAY...

THE HEAT ADVISORY IS NOW IN EFFECT UNTIL 8 PM EDT FRIDAY.

HAZARDOUS WEATHER...

 * HIGH HUMIDITY AND MAX TEMPERATURES IN THE LOW TO MID 90S RESULTING
   IN HEAT INDICIES OF 95 TO 105 DEGREES THROUGH FRIDAY.

 * LITTLE OVERNIGHT RELIEF WITH HUMIDITY PERSISTING AND LOWS
   PREDOMINATELY IN THE MID 70S.

IMPACTS...

 * HEAT EXHAUSTION OR HEAT STROKE IS POSSIBLE IN EXTREME CASES
   WHERE NO PROTECTIVE ACTION IS TAKEN.

 * MUSCLE CRAMPS AND SUN BURNS ARE ALSO POSSIBLE

PRECAUTIONARY/PREPAREDNESS ACTIONS...

 * A HEAT ADVISORY MEANS THAT A PERIOD OF HOT TEMPERATURES IS
   EXPECTED. THE COMBINATION OF HOT TEMPERATURES AND HIGH
   HUMIDITY WILL COMBINE TO CREATE A SITUATION IN WHICH HEAT
   ILLNESSES ARE POSSIBLE. DRINK PLENTY OF FLUIDS...STAY IN AN
   AIR-CONDITIONED ROOM...STAY OUT OF THE SUN...AND CHECK ON
   RELATIVES AND NEIGHBORS. CHILDREN AND PETS SHOULD NEVER BE
   LEFT UNATTENDED IN VEHICLES UNDER ANY CIRCUMSTANCES.

 * PREPARE...PLAN...AND STAY INFORMED. VISIT
   HTTP://GO.USA.GOV/RR8

&&

$$

SF

Isolated thunderstorms possible this afternoon/evening; little severe potential (July 17)

Very hot, humid air over southern lower MI is likely to contribute to some isolated thunderstorm development across the area this afternoon into the night. These storms will have the potential for very heavy rainfall, and they will move slowly (15-20mph southeast), which could cause localized flooding. Storms are not expected to be severe; they are expected to carry very little hail or damaging wind risk, and virtually no tornado potential.

Also keep in mind the heat advisory in effect today: drink plenty of water, do not leave children or pets in cars, and stay indoors as much as is possible. (Heat advisory text from NWS Detroit)

It is impossible to predict specifically whether any storms will hit Ann Arbor. As those at the Townie Street Party saw Monday night,  it’s possible for the skies around downtown to look very ominous with isolated thunderstorms, but for us to receive only a few drops of rain, especially with storms which are nearly stationary. Storms this afternoon will be similarly very localized.

Looking forward, we can expect basically the same weather Thursday; and stronger severe storms are possible Friday and Friday night as a cold front comes south into the area, bringing slightly cooler temperatures for us, though Saturday will still be warm and storms are still possible Saturday.

Here’s today’s hazardous weather outlook:

HAZARDOUS WEATHER OUTLOOK
NATIONAL WEATHER SERVICE DETROIT/PONTIAC MI
408 AM EDT WED JUL 17 2013

MIZ047>049-053>055-060>063-068>070-075-076-082-083-180900-
MIDLAND-BAY-HURON-SAGINAW-TUSCOLA-SANILAC-SHIAWASSEE-GENESEE-LAPEER-
ST. CLAIR-LIVINGSTON-OAKLAND-MACOMB-WASHTENAW-WAYNE-LENAWEE-MONROE-
408 AM EDT WED JUL 17 2013

THIS HAZARDOUS WEATHER OUTLOOK IS FOR ALL OF SOUTHEAST MICHIGAN.

.DAY ONE...TODAY AND TONIGHT

A HEAT ADVISORY IS IN EFFECT TODAY AND TONIGHT AS HEAT INDEX
VALUES REACH OR EXCEED 100 DEGREES DURING THE DAY AND ONLY FALL
INTO THE 70S TONIGHT. PLEASE SEE THE LATEST FORECASTS AND
STATEMENTS FOR DETAILS.

ISOLATED THUNDERSTORMS ARE POSSIBLE TODAY. SEVERE WEATHER IS NOT
ANTICIPATED BUT STORMS WILL HAVE THE POTENTIAL TO PRODUCE VERY
HEAVY RAINFALL. STORMS WILL MOVE SLOWLY TO THE SOUTHEAST AT 15 TO 20
MPH.

.DAYS TWO THROUGH SEVEN...THURSDAY THROUGH TUESDAY

A HEAT ADVISORY REMAINS IN EFFECT THROUGH THURSDAY AS WARM
TEMPERATURES AND HIGH HUMIDITY CONTINUE TO AFFECT THE AREA. THE
ADVISORY MAY NEED TO BE EXTENDED INTO FRIDAY. THE PROLONGED PERIOD OF HOT
DAYTIME TEMPERATURES AND WARM AND MUGGY NIGHTS WILL INCREASE
STRESS ON THE BODY.

THUNDERSTORMS WILL BE POSSIBLE THURSDAY THROUGH FRIDAY NIGHT
ACROSS ALL OF SOUTHEAST MICHIGAN...AND SOUTH OF I-94 ON SATURDAY.
THE GREATEST POTENTIAL FOR SEVERE WEATHER WILL BE FRIDAY AFTERNOON
THROUGH LATE FRIDAY EVENING AS A STRONG COLD FRONT DROPS SOUTHWARD
THROUGH THE AREA.

.SPOTTER INFORMATION STATEMENT...

SPOTTER ACTIVATION WILL NOT BE NEEDED TODAY AND TONIGHT.

$$

And, for reference, the heat advisory text:

URGENT - WEATHER MESSAGE
NATIONAL WEATHER SERVICE DETROIT/PONTIAC MI
329 AM EDT WED JUL 17 2013

...HOT AND HUMID CONDITIONS PERSISTING THROUGH AT LEAST
THURSDAY...

.A STRONG HIGH PRESSURE SYSTEM IS RESULTING IN AN EXTENDED
STRETCH OF HOT AND HUMID CONDITIONS. VERY HUMID CONDITIONS
COMBINED WITH TEMPERATURES RISING INTO THE LOW TO MID 90S WILL
RESULT IN HEAT INDICIES OF 100 TO 105 DEGREES TODAY AND AROUND 100
DEGREES ON THURSDAY. IN ADDITION...OVERNIGHT RELIEF FROM THE HEAT
WILL BE MINIMAL AS HUMID CONDITIONS PERSIST AND LOWS HOLD
PREDOMINATELY IN THE MID 70S.

MIZ047>049-053>055-060>063-068>070-075-076-082-083-172000-
/O.CON.KDTX.HT.Y.0001.000000T0000Z-130719T0400Z/
MIDLAND-BAY-HURON-SAGINAW-TUSCOLA-SANILAC-SHIAWASSEE-GENESEE-
LAPEER-ST. CLAIR-LIVINGSTON-OAKLAND-MACOMB-WASHTENAW-WAYNE-
LENAWEE-MONROE-
INCLUDING THE CITIES OF...MIDLAND...BAY CITY...BAD AXE...
SAGINAW...CARO...SANDUSKY...OWOSSO...FLINT...LAPEER...
PORT HURON...HOWELL...PONTIAC...WARREN...ANN ARBOR...DETROIT...
ADRIAN...MONROE
329 AM EDT WED JUL 17 2013

...HEAT ADVISORY REMAINS IN EFFECT UNTIL MIDNIGHT EDT THURSDAY
NIGHT...

HAZARDOUS WEATHER...

 * HIGH HUMIDITY AND TEMPERATURES IN THE LOW TO MID 90S RESULTING
   IN AFTERNOON HEAT INDICIES OF 100 TO 105 DEGREES TODAY AND
   AROUND 100 DEGREES ON THURSDAY.

 * LITTLE OVERNIGHT RELIEF WITH HUMIDITY PERSISTING AND LOWS
   PREDOMINATELY IN THE MID 70S.

IMPACTS...

 * HEAT EXHAUSTION OR HEAT STROKE IS POSSIBLE IN EXTREME CASES
   WHERE NO PROTECTIVE ACTION IS TAKEN.

 * MUSCLE CRAMPS AND SUN BURNS ARE ALSO POSSIBLE

PRECAUTIONARY/PREPAREDNESS ACTIONS...

 * A HEAT ADVISORY MEANS THAT A PERIOD OF HOT TEMPERATURES IS
   EXPECTED. THE COMBINATION OF HOT TEMPERATURES AND HIGH
   HUMIDITY WILL COMBINE TO CREATE A SITUATION IN WHICH HEAT
   ILLNESSES ARE POSSIBLE. DRINK PLENTY OF FLUIDS...STAY IN AN
   AIR-CONDITIONED ROOM...STAY OUT OF THE SUN...AND CHECK ON
   RELATIVES AND NEIGHBORS. CHILDREN AND PETS SHOULD NEVER BE
   LEFT UNATTENDED IN VEHICLES UNDER ANY CIRCUMSTANCES.

 * PREPARE...PLAN...AND STAY INFORMED. VISIT
   HTTP://GO.USA.GOV/RR8

&&

$$

Heat advisory extended through midnight Thursday night

The heat advisory for our area has been extended through midnight Thursday night. Expect hot, humid conditions for the next three days, with heat indices above 100° and lows only in the 70s.

Remember:

  • Stay hydrated, especially if you’re outside for long periods of time; drink plenty of water, not pop, coffee, etc
  • Never leave children or pets in a car for any amount of time, for any reason
  • Wear sunscreen
  • Look out for symptoms of dehydration, heat exhaustion, and heat stroke
  • As much as possible, stay in air-conditioned buildings
  • As much as possible, avoid being in the sun
WWUS73 KDTX 161923
NPWDTX

URGENT - WEATHER MESSAGE
NATIONAL WEATHER SERVICE DETROIT/PONTIAC MI
323 PM EDT TUE JUL 16 2013

...HOT AND HUMID CONDITIONS PERSISTING THROUGH AT LEAST THURSDAY...

.A STRONG HIGH PRESSURE SYSTEM IS RESULTING IN AN EXTENDED
STRETCH OF HOT AND HUMID CONDITIONS. VERY HUMID CONDITIONS
COMBINED WITH TEMPERATURES RISING INTO THE LOW TO MID 90S WILL
RESULT IN HEAT INDICIES AROUND 100 DEGREES ACROSS SOUTHEAST
MICHIGAN THIS AFTERNOON...WEDNESDAY AFTERNOON...AS WELL AS THURSDAY
AFTERNOON. IN ADDITION...OVERNIGHT RELIEF FROM THE HEAT WILL BE
MINIMAL AS HUMID CONDITIONS PERSIST AND LOWS HOLD PREDOMINATELY IN
THE MID 70S.

MIZ047>049-053>055-060>063-068>070-075-076-082-083-170900-
/O.EXT.KDTX.HT.Y.0001.000000T0000Z-130719T0400Z/
MIDLAND-BAY-HURON-SAGINAW-TUSCOLA-SANILAC-SHIAWASSEE-GENESEE-
LAPEER-ST. CLAIR-LIVINGSTON-OAKLAND-MACOMB-WASHTENAW-WAYNE-
LENAWEE-MONROE-
INCLUDING THE CITIES OF...MIDLAND...BAY CITY...BAD AXE...
SAGINAW...CARO...SANDUSKY...OWOSSO...FLINT...LAPEER...
PORT HURON...HOWELL...PONTIAC...WARREN...ANN ARBOR...DETROIT...
ADRIAN...MONROE
323 PM EDT TUE JUL 16 2013

...HEAT ADVISORY NOW IN EFFECT UNTIL MIDNIGHT EDT THURSDAY
NIGHT...

THE HEAT ADVISORY IS NOW IN EFFECT UNTIL MIDNIGHT EDT THURSDAY
NIGHT.

HAZARDOUS WEATHER...

 * HIGH HUMIDITY AND MAX TEMPERATURES IN THE LOW TO MID 90S RESULTING
   IN AFTERNOON HEAT INDICIES AROUND 100 DEGREES.

 * LITTLE OVERNIGHT RELIEF WITH HUMIDITY PERSISTING AND LOWS
   PREDOMINATELY IN THE MID 70S.

IMPACTS...

 * HEAT EXHAUSTION OR HEAT STROKE IS POSSIBLE IN EXTREME CASES
   WHERE NO PROTECTIVE ACTION IS TAKEN.

 * MUSCLE CRAMPS AND SUN BURNS ARE ALSO POSSIBLE

PRECAUTIONARY/PREPAREDNESS ACTIONS...

 * A HEAT ADVISORY MEANS THAT A PERIOD OF HOT TEMPERATURES IS
   EXPECTED. THE COMBINATION OF HOT TEMPERATURES AND HIGH
   HUMIDITY WILL COMBINE TO CREATE A SITUATION IN WHICH HEAT
   ILLNESSES ARE POSSIBLE. DRINK PLENTY OF FLUIDS...STAY IN AN
   AIR-CONDITIONED ROOM...STAY OUT OF THE SUN...AND CHECK ON
   RELATIVES AND NEIGHBORS. CHILDREN AND PETS SHOULD NEVER BE
   LEFT UNATTENDED IN VEHICLES UNDER ANY CIRCUMSTANCES.

 * PREPARE...PLAN...AND STAY INFORMED. VISIT
   HTTP://GO.USA.GOV/RR8

&&

$$

SF

Isolated thunderstorms possible this afternoon/evening; little severe potential (July 16)

Very hot, humid air over southern lower MI is likely to contribute to some isolated thunderstorm development across the area this afternoon into the night. These storms will have the potential for very heavy rainfall, and they will barely move (less than 10mph east-southeast), which could cause localized flooding. Storms are not expected to be severe; they are expected to carry very little hail or damaging wind risk, and virtually no tornado potential.

It is impossible to predict specifically whether any storms will hit Ann Arbor. As those at the Townie Street Party saw last night,  it’s possible for the skies around downtown to look very ominous, but for us to receive only a few drops of rain, especially with storms which are nearly stationary. Storms this afternoon will be similarly very localized.

Highly localized rainfall from a thunderstorm south of downtown Ann Arbor, July 15, 2013
Highly localized rainfall from a thunderstorm south-southwest of downtown Ann Arbor, July 15, 2013

Also keep in mind the heat advisory in effect today: drink plenty of water, do not leave children or pets in cars, and stay indoors as much as is possible. (Heat advisory text from NWS Detroit)

Looking forward, we can expect basically the same weather Wednesday and Thursday; and stronger severe storms are possible Friday and Friday night as a cold front comes south into the area, bringing slightly cooler temperatures for us, though Saturday will still be warm and storms are still possible Saturday.

Here’s today’s hazardous weather outlook:

HAZARDOUS WEATHER OUTLOOK
NATIONAL WEATHER SERVICE DETROIT/PONTIAC MI
447 AM EDT TUE JUL 16 2013

MIZ047>049-053>055-060>063-068>070-075-076-082-083-170900-
MIDLAND-BAY-HURON-SAGINAW-TUSCOLA-SANILAC-SHIAWASSEE-GENESEE-LAPEER-
ST. CLAIR-LIVINGSTON-OAKLAND-MACOMB-WASHTENAW-WAYNE-LENAWEE-MONROE-
447 AM EDT TUE JUL 16 2013

THIS HAZARDOUS WEATHER OUTLOOK IS FOR ALL OF SOUTHEAST MICHIGAN.

.DAY ONE...TODAY AND TONIGHT

A HEAT ADVISORY IS IN EFFECT TODAY AND TONIGHT AS HEAT INDEX
VALUES REACH OR EXCEED 100 DEGREES DURING THE DAY AND LOWS ONLY
FALL INTO THE 70S TONIGHT.

THERE IS ALSO A CHANCE FOR THUNDERSTORMS THIS AFTERNOON AND
EVENING...PARTICULARLY NORTH OF I-94. THESE STORMS ARE NOT
EXPECTED TO BE SEVERE...BUT WILL HAVE THE POTENTIAL TO PRODUCE
VERY HEAVY RAINFALL. SLOW STORM MOTION OF UNDER 10 MPH TO THE
EAST-SOUTHEAST MAY LEAD TO LOCALIZED FLOODING.

.DAYS TWO THROUGH SEVEN...WEDNESDAY THROUGH MONDAY

A HEAT ADVISORY REMAINS IN EFFECT THROUGH MIDNIGHT ON WEDNESDAY.
AN ADDITIONAL HEAT ADVISORY MAY BE NEEDED ON THURSDAY AS WARM
TEMPERATURES AND HIGH HUMIDITY CONTINUE TO AFFECT THE AREA. THE
PROLONGED PERIOD OF HOT DAYTIME TEMPERATURES AND WARM AND MUGGY
NIGHTS WILL INCREASE STRESS ON THE BODY.

THUNDERSTORMS WILL BE POSSIBLE ON WEDNESDAY AND WEDNESDAY
EVENING...AND AGAIN THURSDAY THROUGH MID-DAY SATURDAY. THE
GREATEST POTENTIAL TO SEE ANY SEVERE WEATHER WILL BE ON FRIDAY AND
FRIDAY NIGHT AS A STRONG COLD FRONT DROPS SOUTHWARD THROUGH THE
AREA.

.SPOTTER INFORMATION STATEMENT...

SPOTTER ACTIVATION WILL NOT BE NEEDED TODAY AND TONIGHT.

$$

HLO

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