Alert archive / Minnesota / Heat Advisories in 2019

Heat Advisory 3, NWS Twin Cities, MN

July 17, 201929 counties in Minnesota; 9 counties in Wisconsin

NWS Twin Cities, MN issued this heat advisory at Jul 17, 2019, 2:41 PM CDT for 29 counties in Minnesota; 9 counties in Wisconsin. It took effect at Jul 18, 2019, 12:00 PM CDT. It was in force for 32 hr.

The area

The counties it named.

The facts

Issued
Jul 17, 2019, 2:41 PM CDT (19:41 UTC)
In effect from
Jul 18, 2019, 12:00 PM CDT
Expired
Jul 19, 2019, 8:00 PM CDT
In force
32 hr
Issued by
NWS Twin Cities, MN
All 38 counties

Anoka County, MN, Benton County, MN, Blue Earth County, MN, Brown County, MN, Carver County, MN, Chippewa County, MN, Chisago County, MN, Dakota County, MN, Faribault County, MN, Freeborn County, MN, Goodhue County, MN, Hennepin County, MN, Isanti County, MN, Kandiyohi County, MN, Lac qui Parle County, MN, Le Sueur County, MN, Martin County, MN, Nicollet County, MN, Ramsey County, MN, Rice County, MN, Scott County, MN, Sherburne County, MN, Sibley County, MN, Stearns County, MN, Steele County, MN, Swift County, MN, Waseca County, MN, Washington County, MN, Watonwan County, MN, Barron County, WI, Chippewa County, WI, Dunn County, WI, Eau Claire County, WI, Pepin County, WI, Pierce County, WI, Polk County, WI, Rusk County, WI, Saint Croix County, WI

The radar

The Minneapolis radar (KMPX), 12 km from the middle of the area, began a volume at 19:43 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.

The nearest sounding before it

Minneapolis, MN (KMPX), launched 12:00Z, 7.7 hours before the alert went out and 14 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-pSkew-T log-p diagram, Minneapolis, MN at 12:00Z on 2019-07-17Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 105 joules per kilogram.LCLLFCEL10008507005003002001001 km2 km3 km6 km9 km12 km15 km-30°-20°-10°0°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Minneapolis, MN at 12:00Z on 2019-07-17The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 16 square meters per square second.193958Sfc1 km3 km6 km9 kmRMLM
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
105 J/kg
Mixed-layer CIN
-240 J/kg
Mixed-layer LCL
1197 m above ground
0-6 km bulk shear
19 kt
0-1 km storm-relative helicity
16 m²/s²
0-3 km storm-relative helicity
79 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.0

Open this sounding in Storm Lab

The text

As transmitted.

231 
WWUS73 KMPX 171941
NPWMPX

URGENT - WEATHER MESSAGE
National Weather Service Twin Cities/Chanhassen MN
241 PM CDT Wed Jul 17 2019

MNZ060>063-067>070-074>078-082>085-091>093-WIZ023>028-180345-
/O.NEW.KMPX.HT.Y.0003.190718T1700Z-190720T0000Z/
Hennepin-Anoka-Ramsey-Washington-Sibley-Carver-Scott-Dakota-Brown-
Nicollet-Le Sueur-Rice-Goodhue-Watonwan-Blue Earth-Waseca-Steele-
Martin-Faribault-Freeborn-St. Croix-Pierce-Dunn-Pepin-Chippewa-
Eau Claire-
Including the cities of Minneapolis, Blaine, St Paul, Stillwater,
Gaylord, Chaska, Shakopee, Hastings, New Ulm, St Peter, Le Sueur,
Faribault, Red Wing, St James, Mankato, Waseca, Owatonna, 
Fairmont, Blue Earth, Albert Lea, Hudson, River Falls, Prescott, 
Menomonie, Durand, Chippewa Falls, and Eau Claire
241 PM CDT Wed Jul 17 2019

...HEAT ADVISORY IN EFFECT FROM NOON THURSDAY TO 7 PM CDT
FRIDAY...

The National Weather Service in Twin Cities/Chanhassen has issued
a Heat Advisory, which is in effect from noon Thursday to 7 PM
CDT Friday. 

* TEMPERATURE...Highs around 90 Thursday and 90 to 95 Friday,
  combined with dewpoints in the 70s, will make for heat indices
  around 95 to 105 degrees for both Thursday and Friday afternoon.
  Low temperatures will only fall to 70 to 75, providing little 
  relief from the heat. 

* IMPACTS...The high heat indices during the day will lead to
  increased risk for heat-related illness for those active
  outdoors or with limited access to air conditioning. 

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 up on relatives and
neighbors.

   Take extra precautions...if you work or spend time outside.
When possible...reschedule strenuous activities to early morning
or evening. Know the signs and symptoms of heat exhaustion and
heat stroke. Wear light weight and loose fitting clothing when
possible and drink plenty of water.

   To reduce risk during outdoor work...the occupational safety
and health administration recommends scheduling frequent rest
breaks in shaded or air conditioned environments. Anyone overcome
by heat should be moved to a cool and shaded location.   Heat
stroke is an emergency...call 9 1 1.

&&

$$
6 follow-up statements
009 
WWUS73 KMPX 180251
NPWMPX

URGENT - WEATHER MESSAGE
National Weather Service Twin Cities/Chanhassen MN
951 PM CDT Wed Jul 17 2019

MNZ060>063-067>070-074>078-082>085-091>093-WIZ023>028-181130-
/O.CON.KMPX.HT.Y.0003.190718T1700Z-190720T0000Z/
Hennepin-Anoka-Ramsey-Washington-Sibley-Carver-Scott-Dakota-Brown-
Nicollet-Le Sueur-Rice-Goodhue-Watonwan-Blue Earth-Waseca-Steele-
Martin-Faribault-Freeborn-St. Croix-Pierce-Dunn-Pepin-Chippewa-
Eau Claire-
Including the cities of Minneapolis, Blaine, St Paul, Stillwater,
Gaylord, Chaska, Shakopee, Hastings, New Ulm, St Peter, Le Sueur,
Faribault, Red Wing, St James, Mankato, Waseca, Owatonna, 
Fairmont, Blue Earth, Albert Lea, Hudson, River Falls, Prescott, 
Menomonie, Durand, Chippewa Falls, and Eau Claire
951 PM CDT Wed Jul 17 2019

...HEAT ADVISORY REMAINS IN EFFECT FROM NOON THURSDAY TO 7 PM CDT
FRIDAY...

* TEMPERATURE...Highs around 90 Thursday and 90 to 95 Friday,
  combined with dew points in the 70s, will make for heat indices
  of 95 to 105 degrees for both Thursday and Friday afternoon. 
  Low temperatures will only fall to 70 to 75, providing little 
  relief from the heat. 

* IMPACTS...The high heat indices during the day will lead to 
  increased risk for heat-related illness for those active 
  outdoors or with limited access to air conditioning. 

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 up on relatives and
neighbors.

Take extra precautions...if you work or spend time outside. When 
possible...reschedule strenuous activities to early morning or 
evening. Know the signs and symptoms of heat exhaustion and heat 
stroke. Wear light weight and loose fitting clothing when possible
and drink plenty of water.

To reduce risk during outdoor work...the occupational safety and 
health administration recommends scheduling frequent rest breaks 
in shaded or air conditioned environments. Anyone overcome by heat
should be moved to a cool and shaded location. Heat stroke is an 
emergency...call 9 1 1.

&&

$$

Borghoff
386 
WWUS73 KMPX 181156
NPWMPX

URGENT - WEATHER MESSAGE
National Weather Service Twin Cities/Chanhassen MN
656 AM CDT Thu Jul 18 2019


MNZ060>063-067>070-074>078-082>085-091>093-WIZ023>028-182100-
/O.CON.KMPX.HT.Y.0003.190718T1700Z-190720T0000Z/
Hennepin-Anoka-Ramsey-Washington-Sibley-Carver-Scott-Dakota-Brown-
Nicollet-Le Sueur-Rice-Goodhue-Watonwan-Blue Earth-Waseca-Steele-
Martin-Faribault-Freeborn-St. Croix-Pierce-Dunn-Pepin-Chippewa-
Eau Claire-
Including the cities of Minneapolis, Blaine, St Paul, Stillwater,
Gaylord, Chaska, Shakopee, Hastings, New Ulm, St Peter, Le Sueur,
Faribault, Red Wing, St James, Mankato, Waseca, Owatonna, 
Fairmont, Blue Earth, Albert Lea, Hudson, River Falls, Prescott, 
Menomonie, Durand, Chippewa Falls, and Eau Claire
656 AM CDT Thu Jul 18 2019

...HEAT ADVISORY REMAINS IN EFFECT FROM NOON TODAY TO 7 PM CDT
FRIDAY...

* TEMPERATURE...Highs around 90 Thursday and 90 to 95 Friday, 
  combined with dew points in the 70s, will make for heat 
  indices of 95 to 105 degrees for both Thursday and Friday 
  afternoon. Low temperatures will only fall to 70 to 75, 
  providing little relief from the heat. 

* IMPACTS...The high heat indices during the day will lead to 
  increased risk for heat-related illness for those active 
  outdoors or with limited access to air conditioning. 

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 up on relatives and
neighbors.

Take extra precautions...if you work or spend time outside. When
possible...reschedule strenuous activities to early morning or
evening. Know the signs and symptoms of heat exhaustion and heat
stroke. Wear light weight and loose fitting clothing when
possible and drink plenty of water.

&&

$$
662 
WWUS73 KMPX 182021
NPWMPX

URGENT - WEATHER MESSAGE
National Weather Service Twin Cities/Chanhassen MN
321 PM CDT Thu Jul 18 2019

MNZ060>063-067>070-074>078-082>085-091>093-WIZ023>028-190430-
/O.CON.KMPX.HT.Y.0003.000000T0000Z-190720T0000Z/
Hennepin-Anoka-Ramsey-Washington-Sibley-Carver-Scott-Dakota-Brown-
Nicollet-Le Sueur-Rice-Goodhue-Watonwan-Blue Earth-Waseca-Steele-
Martin-Faribault-Freeborn-St. Croix-Pierce-Dunn-Pepin-Chippewa-
Eau Claire-
Including the cities of Minneapolis, Blaine, St Paul, Stillwater,
Gaylord, Chaska, Shakopee, Hastings, New Ulm, St Peter, Le Sueur,
Faribault, Red Wing, St James, Mankato, Waseca, Owatonna, 
Fairmont, Blue Earth, Albert Lea, Hudson, River Falls, Prescott, 
Menomonie, Durand, Chippewa Falls, and Eau Claire
321 PM CDT Thu Jul 18 2019

...HEAT ADVISORY REMAINS IN EFFECT UNTIL 7 PM CDT FRIDAY...

* TEMPERATURE...Highs of 90 to 95 Friday, combined with dew points
  in the 70s, will make for heat indices of 95 to 105 degrees  
  Friday afternoon. Low temperatures will only fall to 70 to 75, 
  providing little relief from the heat. 

* IMPACTS...The high heat indices during the day will lead to 
  increased risk for heat-related illness for those active 
  outdoors or with limited access to air conditioning. 

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 up on relatives and
neighbors.

Take extra precautions...if you work or spend time outside. When
possible...reschedule strenuous activities to early morning or
evening. Know the signs and symptoms of heat exhaustion and heat
stroke. Wear light weight and loose fitting clothing when
possible and drink plenty of water.

&&

$$
313 
WWUS73 KMPX 190446
NPWMPX

URGENT - WEATHER MESSAGE
National Weather Service Twin Cities/Chanhassen MN
1146 PM CDT Thu Jul 18 2019

MNZ060>063-067>070-074>078-082>085-091>093-WIZ023>028-191300-
/O.CON.KMPX.HT.Y.0003.000000T0000Z-190720T0000Z/
Hennepin-Anoka-Ramsey-Washington-Sibley-Carver-Scott-Dakota-Brown-
Nicollet-Le Sueur-Rice-Goodhue-Watonwan-Blue Earth-Waseca-Steele-
Martin-Faribault-Freeborn-St. Croix-Pierce-Dunn-Pepin-Chippewa-
Eau Claire-
Including the cities of Minneapolis, Blaine, St Paul, Stillwater,
Gaylord, Chaska, Shakopee, Hastings, New Ulm, St Peter, Le Sueur,
Faribault, Red Wing, St James, Mankato, Waseca, Owatonna, 
Fairmont, Blue Earth, Albert Lea, Hudson, River Falls, Prescott, 
Menomonie, Durand, Chippewa Falls, and Eau Claire
1146 PM CDT Thu Jul 18 2019

...HEAT ADVISORY REMAINS IN EFFECT UNTIL 7 PM CDT FRIDAY...

* TEMPERATURE...Highs of 90 to 95 Friday, combined with dew 
  points in the 70s, will make for heat indices of 95 to 105 
  degrees Friday afternoon. Low temperatures will only fall to 
  70 to 75, providing little relief from the heat. 

* IMPACTS...The high heat indices during the day will lead to 
  increased risk for heat-related illness for those active 
  outdoors or with limited access to air conditioning. 

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 up on relatives and
neighbors.

Take extra precautions...if you work or spend time outside. When
possible...reschedule strenuous activities to early morning or
evening. Know the signs and symptoms of heat exhaustion and heat
stroke. Wear light weight and loose fitting clothing when
possible and drink plenty of water.

&&

$$
244 
WWUS73 KMPX 190831
NPWMPX

URGENT - WEATHER MESSAGE
National Weather Service Twin Cities/Chanhassen MN
331 AM CDT Fri Jul 19 2019

MNZ060>063-067>070-074>078-082>085-091>093-WIZ024-026-028-191645-
/O.UPG.KMPX.HT.Y.0003.000000T0000Z-190720T0000Z/
/O.NEW.KMPX.EH.W.0002.190719T0831Z-190720T0300Z/
Hennepin-Anoka-Ramsey-Washington-Sibley-Carver-Scott-Dakota-Brown-
Nicollet-Le Sueur-Rice-Goodhue-Watonwan-Blue Earth-Waseca-Steele-
Martin-Faribault-Freeborn-Pierce-Pepin-Eau Claire-
Including the cities of Minneapolis, Blaine, St Paul, Stillwater,
Gaylord, Chaska, Shakopee, Hastings, New Ulm, St Peter, Le Sueur,
Faribault, Red Wing, St James, Mankato, Waseca, Owatonna, 
Fairmont, Blue Earth, Albert Lea, River Falls, Prescott, Durand, 
and Eau Claire
331 AM CDT Fri Jul 19 2019

...EXCESSIVE HEAT WARNING IN EFFECT UNTIL 10 PM CDT THIS
EVENING...

The National Weather Service in Twin Cities/Chanhassen has issued
an Excessive Heat Warning, which is in effect until 10 PM CDT
this evening.

* TEMPERATURE...Highs of 90 to 95 Friday, combined with dew points
  in the upper 70s, will make for heat indices of 100 to 110 
  degrees Friday afternoon. Low temperatures will only fall to 70 
  to 75, providing little relief from the heat. 

* IMPACTS...The high heat indices during the day will lead to 
  increased risk for heat-related illness for those active 
  outdoors or with limited access to air conditioning. 

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Take extra precautions...if you work or spend time outside. When
possible...reschedule strenuous activities to early morning or
evening. Know the signs and symptoms of heat exhaustion and heat
stroke. Wear light weight and loose fitting clothing when
possible and drink plenty of water.

   To reduce risk during outdoor work...the occupational safety
and health administration recommends scheduling frequent rest
breaks in shaded or air conditioned environments. Anyone overcome
by heat should be moved to a cool and shaded location.   Heat
stroke is an emergency...call 9 1 1.

   An Excessive Heat Warning means that a prolonged period of
dangerously hot temperatures will occur. The combination of hot
temperatures and high humidity will combine to create a dangerous
situation in which heat illnesses are likely. Drink plenty of
fluids...stay in an air-conditioned room...stay out of the sun...
and check up on relatives and neighbors.

   Young children and pets should never be left unattended in
vehicles under any circumstances.  This is especially true during
warm or hot weather when car interiors can reach lethal
temperatures in a matter of minutes.

&&

$$

MNZ058-059-064>066-073-191645-
/O.NEW.KMPX.EH.W.0002.190719T0831Z-190720T0300Z/
Meeker-Wright-Yellow Medicine-Renville-McLeod-Redwood-
Including the cities of Litchfield, Monticello, Granite Falls, 
Olivia, Hutchinson, and Redwood Falls
331 AM CDT Fri Jul 19 2019

...EXCESSIVE HEAT WARNING IN EFFECT UNTIL 10 PM CDT THIS
EVENING...

The National Weather Service in Twin Cities/Chanhassen has issued
an Excessive Heat Warning, which is in effect until 10 PM CDT
this evening. 

* TEMPERATURE...Highs of 90 to 95 Friday, combined with dew points
  in the upper 70s, will make for heat indices of 100 to 110 
  degrees Friday afternoon. Low temperatures will only fall to 70 
  to 75, providing little relief from the heat. 

* IMPACTS...The high heat indices during the day will lead to
  increased risk for heat-related illness for those active
  outdoors or with limited access to air conditioning. 

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Take extra precautions...if you work or spend time outside. When
possible...reschedule strenuous activities to early morning or
evening. Know the signs and symptoms of heat exhaustion and heat
stroke. Wear light weight and loose fitting clothing when
possible and drink plenty of water.

   To reduce risk during outdoor work...the occupational safety
and health administration recommends scheduling frequent rest
breaks in shaded or air conditioned environments. Anyone overcome
by heat should be moved to a cool and shaded location.   Heat
stroke is an emergency...call 9 1 1.

   An Excessive Heat Warning means that a prolonged period of
dangerously hot temperatures will occur. The combination of hot
temperatures and high humidity will combine to create a dangerous
situation in which heat illnesses are likely. Drink plenty of
fluids...stay in an air-conditioned room...stay out of the sun...
and check up on relatives and neighbors.

   Young children and pets should never be left unattended in
vehicles under any circumstances.  This is especially true during
warm or hot weather when car interiors can reach lethal
temperatures in a matter of minutes.

&&

$$

MNZ049>057-WIZ014>016-191645-
/O.EXB.KMPX.HT.Y.0003.000000T0000Z-190720T0100Z/
Stearns-Benton-Sherburne-Isanti-Chisago-Lac Qui Parle-Swift-
Chippewa-Kandiyohi-Polk-Barron-Rusk-
Including the cities of St Cloud, Foley, Elk River, Cambridge, 
Center City, Madison, Benson, Montevideo, Willmar, Osceola, 
Rice Lake, and Ladysmith
331 AM CDT Fri Jul 19 2019

...HEAT ADVISORY IN EFFECT UNTIL 8 PM CDT THIS EVENING...

The National Weather Service in Twin Cities/Chanhassen has issued
a Heat Advisory, which is in effect until 8 PM CDT this evening. 

* TEMPERATURE...Highs of 90 to 95 Friday, combined with dew points
  in the 70s, will make for heat indices of 95 to 105 degrees 
  Friday afternoon. Low temperatures will only fall to 70 to 75, 
  providing little relief from the heat. 

* IMPACTS...The high heat indices during the day will lead to 
  increased risk for heat-related illness for those active 
  outdoors or with limited access to air conditioning. 

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 up on relatives and
neighbors.

Take extra precautions...if you work or spend time outside. When
possible...reschedule strenuous activities to early morning or
evening. Know the signs and symptoms of heat exhaustion and heat
stroke. Wear light weight and loose fitting clothing when
possible and drink plenty of water.

&&

$$

WIZ023-025-027-191645-
/O.EXT.KMPX.HT.Y.0003.000000T0000Z-190720T0100Z/
St. Croix-Dunn-Chippewa-
Including the cities of Hudson, Menomonie, and Chippewa Falls
331 AM CDT Fri Jul 19 2019

...HEAT ADVISORY NOW IN EFFECT UNTIL 8 PM CDT THIS EVENING...

* TEMPERATURE...Highs of 90 to 95 Friday, combined with dew 
  points in the 70s, will make for heat indices of 95 to 105 
  degrees Friday afternoon. Low temperatures will only fall to 
  70 to 75, providing little relief from the heat. 

* IMPACTS...The high heat indices during the day will lead to 
  increased risk for heat-related illness for those active 
  outdoors or with limited access to air conditioning. 

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 up on relatives and
neighbors.

Take extra precautions...if you work or spend time outside. When
possible...reschedule strenuous activities to early morning or
evening. Know the signs and symptoms of heat exhaustion and heat
stroke. Wear light weight and loose fitting clothing when
possible and drink plenty of water.

&&

$$
773 
WWUS73 KMPX 191947
NPWMPX

URGENT - WEATHER MESSAGE
National Weather Service Twin Cities/Chanhassen MN
247 PM CDT Fri Jul 19 2019

MNZ058>070-073>078-082>085-091>093-WIZ024-026-028-200300-
/O.CON.KMPX.EH.W.0002.000000T0000Z-190720T0300Z/
Meeker-Wright-Hennepin-Anoka-Ramsey-Washington-Yellow Medicine-
Renville-McLeod-Sibley-Carver-Scott-Dakota-Redwood-Brown-Nicollet-
Le Sueur-Rice-Goodhue-Watonwan-Blue Earth-Waseca-Steele-Martin-
Faribault-Freeborn-Pierce-Pepin-Eau Claire-
Including the cities of Litchfield, Monticello, Minneapolis, 
Blaine, St Paul, Stillwater, Granite Falls, Olivia, Hutchinson, 
Gaylord, Chaska, Shakopee, Hastings, Redwood Falls, New Ulm, 
St Peter, Le Sueur, Faribault, Red Wing, St James, Mankato, 
Waseca, Owatonna, Fairmont, Blue Earth, Albert Lea, River Falls, 
Prescott, Durand, and Eau Claire
247 PM CDT Fri Jul 19 2019

...EXCESSIVE HEAT WARNING REMAINS IN EFFECT UNTIL 10 PM CDT THIS
EVENING...

* TEMPERATURE...Highs of 90 to 95 this afternoon, combined with
  dew points in the upper 70s and low 80s, has resulted in heat
  indices of 105 to 115 degrees. Cooler temperatures are expected
  later tonight, as a cold front moves across the area.

* IMPACTS...The high heat indices during the day will lead to 
  increased risk for heat-related illness for those active 
  outdoors or with limited access to air conditioning. 

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Take extra precautions...if you work or spend time outside. When
possible...reschedule strenuous activities to early morning or
evening. Know the signs and symptoms of heat exhaustion and heat
stroke. Wear light weight and loose fitting clothing when
possible and drink plenty of water.

  To reduce risk during outdoor work...the occupational safety
and health administration recommends scheduling frequent rest
breaks in shaded or air conditioned environments. Anyone overcome
by heat should be moved to a cool and shaded location.   Heat
stroke is an emergency...call 9 1 1.

  An Excessive Heat Warning means that a prolonged period of
dangerously hot temperatures will occur. The combination of hot
temperatures and high humidity will combine to create a dangerous
situation in which heat illnesses are likely. Drink plenty of
fluids...stay in an air-conditioned room...stay out of the sun...
and check up on relatives and neighbors.

  Young children and pets should never be left unattended in
vehicles under any circumstances.  This is especially true during
warm or hot weather when car interiors can reach lethal
temperatures in a matter of minutes.

&&

$$

MNZ049>057-WIZ014>016-023-025-027-200100-
/O.CON.KMPX.HT.Y.0003.000000T0000Z-190720T0100Z/
Stearns-Benton-Sherburne-Isanti-Chisago-Lac Qui Parle-Swift-
Chippewa-Kandiyohi-Polk-Barron-Rusk-St. Croix-Dunn-
Including the cities of St Cloud, Foley, Elk River, Cambridge, 
Center City, Madison, Benson, Montevideo, Willmar, Osceola, 
Rice Lake, Ladysmith, Hudson, Menomonie, and Chippewa Falls
247 PM CDT Fri Jul 19 2019

...HEAT ADVISORY REMAINS IN EFFECT UNTIL 8 PM CDT THIS EVENING...

* TEMPERATURE...Highs around 90 this afternoon, combined with dew
  points in the 70s, has resulted in heat indices of 95 to 105
  degrees. Cooler temperatures are expected after sunset, as a
  cold front moves across the area.

* IMPACTS...The high heat indices during the day will lead to 
  increased risk for heat-related illness for those active 
  outdoors or with limited access to air conditioning. 

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 up on relatives and
neighbors.

Take extra precautions...if you work or spend time outside. When
possible...reschedule strenuous activities to early morning or
evening. Know the signs and symptoms of heat exhaustion and heat
stroke. Wear light weight and loose fitting clothing when
possible and drink plenty of water.

&&

$$

What forecasters said that day

The local office's own words before this heat advisory went out, as it sent them, from the Iowa Environmental Mesonet's archive of National Weather Service text.

NWS Twin Cities, MN wrote its last area forecast discussion before this heat advisory went out at Jul 17, 12:47 PM CDT, 1 hour 54 minutes earlier.

Area forecast discussion, Jul 17, 12:47 PM CDT, 1 hour 54 minutes before
Area Forecast Discussion
National Weather Service Twin Cities/Chanhassen MN
1247 PM CDT Wed Jul 17 2019

.updated for 18z taf discussion below...

.SHORT TERM...(Today through Thursday)
Issued at 340 AM CDT Wed Jul 17 2019

Two large areas of convection was noted on regional radar and
satellite imagery across North and South Dakota early this
morning. Several circulations /MCV/ were noted in these convective
complexes which will lead to uncertainties later today as outflow
from the convection and the remnants of the MCV will initiate
more thunderstorms this afternoon/evening across Minnesota, and
into western Wisconsin.

Todays forecast is based on the current limited instability across
southern Minnesota which should weaken the current complex of
thunderstorms from becoming more widespread as they reach southern
Minnesota this morning. The best chance of morning convection will
be across western Minnesota, but downplayed the chances farther to
the east until late in the day. As previously stated, outflow from
the convection, and the circulations, will lead to uncertainties of
where will the afternoon thunderstorms develop? However, as the
stronger short wave that is currently across Montana this morning
moves over the region tonight, a better chance of more organized
convection should develop. This leads to likely percentages in the
evening across central and southern Minnesota, and only chance
percentages today.

Mid-level wind speeds will increase later today in response to the
anticipated short wave. SPC has highlighted our region with severe
weather potential and this seems reasonable based on the severe
weather parameters expected. The other weather element is the
abnormally high precipitable water content over the region, and the
expected very anomalous water vapor transport later tonight over
Minnesota/Wisconsin. Due to the recent heavy rainfall, and the
anticipated very high rainfall rates from the anomalous
precipitable water values, a flash flood watch has been issued for
portions of east central and south central Minnesota, as well as
west central Wisconsin.

.LONG TERM...(Thursday night through Tuesday)
Issued at 340 AM CDT Wed Jul 17 2019

Slight ridging will give way to troughing over the weekend, with
northwest mid/upper flow taking hold ext week as ridging builds
in the western US. This change in the pattern will finally allow
for less heat and lower humidity across the region, with a reduced
chance for showers and thunderstorms from the weekend onward.
Didn't see any reason to meaningfully deviate from the consensus
guidance, so only made minor adjustments where known biases exist
(such as nighttime low temperatures in the metro area).

&&

.AVIATION...(For the 18Z TAFS through 18Z Thursday afternoon)
Issued at 1245 PM CDT Wed Jul 17 2019

There is a very high probability of TSRA across central/southern
Minnesota during the evening/overnight. Timing of the heaviest
rainfall, and strongest winds remain the most uncertain at
individual locations. Will continue the chance of MVFR cigs/vsbys
psbl IFR cigs/vsbys in TSRA and some lower clouds development
following any convection. Looks like best TSRA potential develop
after 00Z THU over the northwest CWA and then developing east and
south overnight. Will trend exiting west central WI after 08z or
so. Surface winds SE-S and a bit gusty to the west and wind
shifting more westerly as front/thunder exit overnight into THU.

KMSP...
Brief period of MVFR cigs as -shra area dissipates. Then expect
any redevelopment mainly after 00z THU. Best window looks to be
03z- 07z with attendant lower cigs/vsbys. Conditions will become
VFR again mainly after 12z Thursday.

/OUTLOOK FOR KMSP/

Fri...VFR. Isolated TSRA. Winds SW 5 kts becoming NW.
Sat...VFR. Chc TSRA. Wind NE 5 kts.

&&

.MPX WATCHES/WARNINGS/ADVISORIES...
WI...Flash Flood Watch from 7 PM CDT this evening through Thursday
     morning for WIZ023>026.

MN...Flash Flood Watch from 7 PM CDT this evening through Thursday
     morning for MNZ060>063-068>070-076>078-083>085-092-093.

&&

SHORT TERM...JLT
LONG TERM...
AVIATION...DWE
Hazardous weather outlook, Jul 17, 3:35 AM CDT, 11 hours 6 minutes before
Hazardous Weather Outlook
National Weather Service Twin Cities/Chanhassen MN
335 AM CDT Wed Jul 17 2019

MNZ041>045-047>070-073>078-082>085-091>093-WIZ014>016-023>028-
181300-
Douglas-Todd-Morrison-Mille Lacs-Kanabec-Stevens-Pope-Stearns-
Benton-Sherburne-Isanti-Chisago-Lac Qui Parle-Swift-Chippewa-
Kandiyohi-Meeker-Wright-Hennepin-Anoka-Ramsey-Washington-
Yellow Medicine-Renville-McLeod-Sibley-Carver-Scott-Dakota-
Redwood-Brown-Nicollet-Le Sueur-Rice-Goodhue-Watonwan-Blue Earth-
Waseca-Steele-Martin-Faribault-Freeborn-Polk-Barron-Rusk-
St. Croix-Pierce-Dunn-Pepin-Eau Claire-
335 AM CDT Wed Jul 17 2019

This Hazardous Weather Outlook is for portions of central and
southern Minnesota...and west central Wisconsin.

.DAY ONE...Today and Tonight

There is a slight risk of severe thunderstorms today and
tonight, with large hail, damaging wind gusts, and tornadoes
possible. Locally excessive rainfall is also a possibility with
thunderstorms today and tonight, and a Flash Flood Watch is in
effect for east central and portions of south central Minnesota
and west central Wisconsin.

.DAYS TWO THROUGH SEVEN...Thursday through Tuesday

There is a chance for additional thunderstorms from late Thursday
though the weekend, with a few severe storms possible over that
time period along with locally heavy rainfall.

.SPOTTER INFORMATION STATEMENT...

SKYWARN spotter activation will likely be needed this afternoon
and tonight.

In the hours before

Local storm report, Jul 17, 10:31 AM CDT, 4 hours 10 minutes before
PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE TWIN CITIES/CHANHASSEN MN
1031 AM CDT WED JUL 17 2019

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

0700 AM     HEAVY RAIN       3 SW MINNEAPOLIS        44.95N 93.30W
07/17/2019  M2.36 INCH       HENNEPIN           MN   COCORAHS

            24 HOUR TOTAL. COCORAHS STATION MN-HN-147
            MINNEAPOLIS 1WSW.

&&

MKM

The office that day

Everything else NWS Twin Cities, MN issued on the same UTC day.

IssuedProductOfficeCountiesLasted
Jul 17, 2:50 AM CDTFlash Flood WatchMPXAnoka, Blue Earth, Carver, Dakota, Faribault, Freeborn and 9 more27 hr
Jul 16, 8:02 PM CDTSpecial Weather StatementMPXChippewa88 min

Nearby

Heat Advisories in Minnesota, 2019Heat Advisories in Wisconsin, 2019Every heat advisory in 2019

Sources

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