Alert archive / Minnesota / Excessive Heat Warnings in 2018

Excessive Heat Warning 3, NWS Twin Cities, MN

June 28, 201833 counties in Minnesota; 9 counties in Wisconsin

NWS Twin Cities, MN issued this excessive heat warning at Jun 28, 2018, 2:46 PM CDT for 33 counties in Minnesota; 9 counties in Wisconsin. It took effect at Jun 29, 2018, 11:00 AM CDT. It was in force for 11 hr. No storm report in the archive falls inside the area while it was in force.

The area

The counties it named.

The facts

Issued
Jun 28, 2018, 2:46 PM CDT (19:46 UTC)
In effect from
Jun 29, 2018, 11:00 AM CDT
Expired
Jun 29, 2018, 10:00 PM CDT
In force
11 hr
Issued by
NWS Twin Cities, MN
All 42 counties

Anoka County, MN, Benton County, MN, Blue Earth County, MN, Brown County, MN, Carver County, MN, Chisago County, MN, Dakota County, MN, Faribault County, MN, Freeborn County, MN, Goodhue County, MN, Hennepin County, MN, Isanti County, MN, Kanabec County, MN, Kandiyohi County, MN, Le Sueur County, MN, Martin County, MN, McLeod County, MN, Meeker County, MN, Mille Lacs County, MN, Nicollet County, MN, Ramsey County, MN, Redwood County, MN, Renville County, MN, Rice County, MN, Scott County, MN, Sherburne County, MN, Sibley County, MN, Stearns County, MN, Steele County, MN, Waseca County, MN, Washington County, MN, Watonwan County, MN, Wright 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 19:49 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, 7.8 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 2018-06-28Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 142 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 2018-06-28The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 17 square meters per square second.19395878Sfc1 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
142 J/kg
Mixed-layer CIN
-218 J/kg
Mixed-layer LCL
1191 m above ground
0-6 km bulk shear
42 kt
0-1 km storm-relative helicity
17 m²/s²
0-3 km storm-relative helicity
70 m²/s²
Significant tornado parameter
0.0
Supercell composite
-0.0

Open this sounding in Storm Lab

The text

As transmitted.

130 
WWUS73 KMPX 281946
NPWMPX

URGENT - WEATHER MESSAGE
National Weather Service Twin Cities/Chanhassen MN
246 PM CDT Thu Jun 28 2018

MNZ051-059>063-066>070-074>078-082>085-091>093-WIZ023>028-290400-
/O.UPG.KMPX.EH.A.0002.180629T1600Z-180630T0100Z/
/O.NEW.KMPX.EH.W.0003.180629T1600Z-180630T0300Z/
Sherburne-Wright-Hennepin-Anoka-Ramsey-Washington-McLeod-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 Elk River, Monticello, Minneapolis, 
Blaine, St Paul, Stillwater, Hutchinson, 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
246 PM CDT Thu Jun 28 2018

...EXCESSIVE HEAT WARNING IN EFFECT FROM 11 AM TO 10 PM CDT
FRIDAY...

The National Weather Service in Twin Cities/Chanhassen has issued
an Excessive Heat Warning, which is in effect from 11 AM to 10 PM
CDT Friday. The Excessive Heat Watch is no longer in effect. 

* TEMPERATURE...High temperatures in the mid to upper 90s will 
  combine with high humidity to yield dangerous heat indices on 
  Friday. Peak heat indices in the 100 to 110 range appear 
  possible. 

* IMPACTS...Heat illnesses are possible for those active 
  outdoors or those susceptible to heat illnesses, such as 
  children and the elderly. 

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.

&&

$$

MNZ044-045-049-050-052-053-057-058-065-073-WIZ014>016-290400-
/O.EXT.KMPX.EH.A.0002.180629T1600Z-180630T0300Z/
Mille Lacs-Kanabec-Stearns-Benton-Isanti-Chisago-Kandiyohi-Meeker-
Renville-Redwood-Polk-Barron-Rusk-
Including the cities of Princeton, Mora, St Cloud, Foley, 
Cambridge, Center City, Willmar, Litchfield, Olivia, 
Redwood Falls, Osceola, Rice Lake, and Ladysmith
246 PM CDT Thu Jun 28 2018

...EXCESSIVE HEAT WATCH NOW IN EFFECT FROM FRIDAY MORNING THROUGH
FRIDAY EVENING...

* TEMPERATURE...High temperatures in the mid to upper 90s will 
  combine with high humidity to yield dangerous heat indices on 
  Friday. Peak heat indices in the 100 to 110 range appear 
  possible. 

* IMPACTS...Heat illnesses are possible for those active 
  outdoors or those susceptible to heat illnesses, such as 
  children and the elderly. 

PRECAUTIONARY/PREPAREDNESS ACTIONS...

An Excessive Heat Watch means that a prolonged period of hot
temperatures is expected. The combination of hot temperatures and
high humidity will combine to create a dangerous 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.

&&

$$
5 follow-up statements
197 
WWUS73 KMPX 290302
NPWMPX

URGENT - WEATHER MESSAGE
National Weather Service Twin Cities/Chanhassen MN
1002 PM CDT Thu Jun 28 2018


MNZ044-045-049-050-052-053-057-058-065-073-WIZ014>016-291115-
/O.UPG.KMPX.EH.A.0002.180629T1600Z-180630T0300Z/
/O.EXA.KMPX.EH.W.0003.180629T1600Z-180630T0300Z/
Mille Lacs-Kanabec-Stearns-Benton-Isanti-Chisago-Kandiyohi-Meeker-
Renville-Redwood-Polk-Barron-Rusk-
Including the cities of Princeton, Mora, St Cloud, Foley, 
Cambridge, Center City, Willmar, Litchfield, Olivia, 
Redwood Falls, Osceola, Rice Lake, and Ladysmith
1002 PM CDT Thu Jun 28 2018

...EXCESSIVE HEAT WARNING IN EFFECT FROM 11 AM TO 10 PM CDT
FRIDAY...

The National Weather Service in Twin Cities/Chanhassen has issued
an Excessive Heat Warning, which is in effect from 11 AM to 10 PM
CDT Friday. The Excessive Heat Watch is no longer in effect. 

* TEMPERATURE...High temperatures in the mid to upper 90s will
  combine with high humidity to yield dangerous heat indices on
  Friday. Peak heat indices in the 100 to 110 range are expected.
 
* IMPACTS...Heat illnesses are possible for those active 
  outdoors or those susceptible to heat illnesses, such as 
  children and the elderly. 

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.

&&

$$

MNZ051-059>063-066>070-074>078-082>085-091>093-WIZ023>028-291115-
/O.CON.KMPX.EH.W.0003.180629T1600Z-180630T0300Z/
Sherburne-Wright-Hennepin-Anoka-Ramsey-Washington-McLeod-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 Elk River, Monticello, Minneapolis, 
Blaine, St Paul, Stillwater, Hutchinson, 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
1002 PM CDT Thu Jun 28 2018

...EXCESSIVE HEAT WARNING REMAINS IN EFFECT FROM 11 AM TO 10 PM
CDT FRIDAY...

* TEMPERATURE...High temperatures in the mid to upper 90s will
  combine with high humidity to yield dangerous heat indices on
  Friday. Peak heat indices in the 100 to 110 are expected. 

* IMPACTS...Heat illnesses are possible for those active 
  outdoors or those susceptible to heat illnesses, such as 
  children and the elderly. 

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.

&&

$$
083 
WWUS73 KMPX 290743
NPWMPX

URGENT - WEATHER MESSAGE
National Weather Service Twin Cities/Chanhassen MN
243 AM CDT Fri Jun 29 2018


MNZ044-045-049>053-057>063-065>070-073>078-082>085-091>093-
WIZ014>016-023>028-291800-
/O.CON.KMPX.EH.W.0003.180629T1600Z-180630T0300Z/
Mille Lacs-Kanabec-Stearns-Benton-Sherburne-Isanti-Chisago-
Kandiyohi-Meeker-Wright-Hennepin-Anoka-Ramsey-Washington-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-Chippewa-
Eau Claire-
Including the cities of Princeton, Mora, St Cloud, Foley, 
Elk River, Cambridge, Center City, Willmar, Litchfield, 
Monticello, Minneapolis, Blaine, St Paul, Stillwater, 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, 
Osceola, Rice Lake, Ladysmith, Hudson, River Falls, Prescott, 
Menomonie, Durand, Chippewa Falls, and Eau Claire
243 AM CDT Fri Jun 29 2018

...EXCESSIVE HEAT WARNING REMAINS IN EFFECT FROM 11 AM THIS
MORNING TO 10 PM CDT THIS EVENING...

* TEMPERATURE...High temperatures in the mid to upper 90s will
  combine with high humidity to yield dangerous heat indices
  today. Peak heat indices in the 100 to 110 range are expected.
  

* IMPACTS...Heat illnesses are possible for those active 
  outdoors or those susceptible to heat illnesses, such as 
  children and the elderly. 

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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.

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.

&&

$$

MNZ041>043-047-048-054>056-064-291800-
/O.NEW.KMPX.HT.Y.0008.180629T1600Z-180630T0300Z/
Douglas-Todd-Morrison-Stevens-Pope-Lac Qui Parle-Swift-Chippewa-
Yellow Medicine-
Including the cities of Alexandria, Long Prairie, Little Falls, 
Morris, Glenwood, Madison, Benson, Montevideo, and Granite Falls
243 AM CDT Fri Jun 29 2018

...HEAT ADVISORY IN EFFECT FROM 11 AM THIS MORNING TO 10 PM CDT
THIS EVENING...

The National Weather Service in Twin Cities/Chanhassen has issued
a Heat Advisory, which is in effect from 11 AM this morning to
10 PM CDT this evening. 

* TEMPERATURE...High temperatures in the 90s will combine with
  high humidity to yield dangerous heat indices today. Peak heat
  indices in the 100 to 105 range are expected. 

* IMPACTS...Heat illnesses are possible for those active 
  outdoors or those susceptible to heat illnesses, such as 
  children and the elderly. 

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.

&&

$$
266 
WWUS73 KMPX 291437
NPWMPX

URGENT - WEATHER MESSAGE
National Weather Service Twin Cities/Chanhassen MN
937 AM CDT Fri Jun 29 2018

MNZ044-045-049>053-057>063-065>070-073>078-082>085-091>093-
WIZ014>016-023>028-292200-
/O.CON.KMPX.EH.W.0003.180629T1600Z-180630T0300Z/
Mille Lacs-Kanabec-Stearns-Benton-Sherburne-Isanti-Chisago-
Kandiyohi-Meeker-Wright-Hennepin-Anoka-Ramsey-Washington-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-Chippewa-
Eau Claire-
Including the cities of Princeton, Mora, St Cloud, Foley, 
Elk River, Cambridge, Center City, Willmar, Litchfield, 
Monticello, Minneapolis, Blaine, St Paul, Stillwater, 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, 
Osceola, Rice Lake, Ladysmith, Hudson, River Falls, Prescott, 
Menomonie, Durand, Chippewa Falls, and Eau Claire
937 AM CDT Fri Jun 29 2018

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

* TEMPERATURE...High temperatures in the mid to upper 90s will 
  combine with high humidity to yield dangerous heat indices 
  today. Peak heat indices in the 100 to 110 range are expected. 

* IMPACTS...Heat illnesses are possible for those active 
  outdoors or those susceptible to heat illnesses, such as 
  children and the elderly. 

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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.

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.

&&

$$

MNZ041>043-047-048-054>056-064-292200-
/O.CON.KMPX.HT.Y.0008.180629T1600Z-180630T0300Z/
Douglas-Todd-Morrison-Stevens-Pope-Lac Qui Parle-Swift-Chippewa-
Yellow Medicine-
Including the cities of Alexandria, Long Prairie, Little Falls, 
Morris, Glenwood, Madison, Benson, Montevideo, and Granite Falls
937 AM CDT Fri Jun 29 2018

...HEAT ADVISORY REMAINS IN EFFECT UNTIL 10 PM CDT THIS EVENING...

* TEMPERATURE...High temperatures in the 90s will combine with 
  high humidity to yield dangerous heat indices today. Peak heat 
  indices in the 100 to 105 range are expected. 

* IMPACTS...Heat illnesses are possible for those active 
  outdoors or those susceptible to heat illnesses, such as 
  children and the elderly. 

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.

&&

$$
322 
WWUS73 KMPX 292044
NPWMPX

URGENT - WEATHER MESSAGE
National Weather Service Twin Cities/Chanhassen MN
344 PM CDT Fri Jun 29 2018

MNZ044-045-049>053-057>063-065>070-073>078-082>085-091>093-
WIZ014>016-023>028-300300-
/O.CON.KMPX.EH.W.0003.000000T0000Z-180630T0300Z/
Mille Lacs-Kanabec-Stearns-Benton-Sherburne-Isanti-Chisago-
Kandiyohi-Meeker-Wright-Hennepin-Anoka-Ramsey-Washington-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-Chippewa-
Eau Claire-
Including the cities of Princeton, Mora, St Cloud, Foley, 
Elk River, Cambridge, Center City, Willmar, Litchfield, 
Monticello, Minneapolis, Blaine, St Paul, Stillwater, 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, 
Osceola, Rice Lake, Ladysmith, Hudson, River Falls, Prescott, 
Menomonie, Durand, Chippewa Falls, and Eau Claire
344 PM CDT Fri Jun 29 2018

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

* TEMPERATURE...High temperatures in the mid to upper 90s will 
  combine with high humidity to yield dangerous heat indices 
  today. Peak heat indices in the 100 to 110 range are expected. 

* IMPACTS...Heat illnesses are possible for those active 
  outdoors or those susceptible to heat illnesses, such as 
  children and the elderly. 

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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.

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.

&&

$$

MNZ041>043-047-048-054>056-064-300300-
/O.CON.KMPX.HT.Y.0008.000000T0000Z-180630T0300Z/
Douglas-Todd-Morrison-Stevens-Pope-Lac Qui Parle-Swift-Chippewa-
Yellow Medicine-
Including the cities of Alexandria, Long Prairie, Little Falls, 
Morris, Glenwood, Madison, Benson, Montevideo, and Granite Falls
344 PM CDT Fri Jun 29 2018

...HEAT ADVISORY REMAINS IN EFFECT UNTIL 10 PM CDT THIS EVENING...

* TEMPERATURE...High temperatures in the 90s will combine with 
  high humidity to yield dangerous heat indices today. Peak heat 
  indices in the 100 to 105 range are expected. 

* IMPACTS...Heat illnesses are possible for those active 
  outdoors or those susceptible to heat illnesses, such as 
  children and the elderly. 

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.

&&

$$
573 
WWUS73 KMPX 300303
NPWMPX

URGENT - WEATHER MESSAGE
National Weather Service Twin Cities/Chanhassen MN
1003 PM CDT Fri Jun 29 2018

MNZ044-045-049>053-057>063-065>070-073>078-082>085-091>093-
WIZ014>016-023>028-300415-
/O.EXP.KMPX.EH.W.0003.000000T0000Z-180630T0300Z/
Mille Lacs-Kanabec-Stearns-Benton-Sherburne-Isanti-Chisago-
Kandiyohi-Meeker-Wright-Hennepin-Anoka-Ramsey-Washington-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-Chippewa-
Eau Claire-
Including the cities of Princeton, Mora, St Cloud, Foley, 
Elk River, Cambridge, Center City, Willmar, Litchfield, 
Monticello, Minneapolis, Blaine, St Paul, Stillwater, 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, 
Osceola, Rice Lake, Ladysmith, Hudson, River Falls, Prescott, 
Menomonie, Durand, Chippewa Falls, and Eau Claire
1003 PM CDT Fri Jun 29 2018

...EXCESSIVE HEAT WARNING HAS EXPIRED...

$$

MNZ041>043-047-048-054>056-064-300415-
/O.EXP.KMPX.HT.Y.0008.000000T0000Z-180630T0300Z/
Douglas-Todd-Morrison-Stevens-Pope-Lac Qui Parle-Swift-Chippewa-
Yellow Medicine-
Including the cities of Alexandria, Long Prairie, Little Falls, 
Morris, Glenwood, Madison, Benson, Montevideo, and Granite Falls
1003 PM CDT Fri Jun 29 2018

...HEAT ADVISORY HAS EXPIRED...

$$

What forecasters said that day

The local office's own words before this excessive heat warning 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 excessive heat warning went out at Jun 28, 12:51 PM CDT, 1 hour 55 minutes earlier.

Area forecast discussion, Jun 28, 12:51 PM CDT, 1 hour 55 minutes before
Area Forecast Discussion
National Weather Service Twin Cities/Chanhassen MN
1251 PM CDT Thu Jun 28 2018

.UPDATE...
Issued at 632 AM CDT Thu Jun 28 2018

Updated to include 12Z aviation discussion below.

&&

.SHORT TERM...(Today and tonight)
Issued at 352 AM CDT Thu Jun 28 2018

Nighttime microphysics RGB imagery shows mostly clear skies across
the area, with some patchy fog. Some cloud cover, likely accas,
could be seen moving into the western portion of the area in
association with higher 850 mb theta-e values evident in the RAP
analysis. Some of the CAMs show isolated convection developing in
the western and northern portion of the forecast area over the next
few hours, but the last few runs of the HRRR and HopWRF have been
less bullish on that, and the current theta-e gradient would suggest
that it would probably occur just north of our area if it were to do
so. Otherwise, there is a better signal for more widespread
convection to get going across the western high Plains before
daybreak ahead of an approaching shortwave trough, and that has
already begun across western Nebraska. Expect to see it occur in
western South Dakota shortly. That activity will push east through
the morning hours, but is expected to weaken as it approaches
Minnesota. Left PoPs out of the forecast for the west today, but any
upstream activity that develops will need to be monitored, and it's
possible that some PoPs will be needed for the west central and
southwest portion of the forecast area for late morning or early
afternoon.

The guidance still indicates that widespread convection will develop
during the late afternoon and evening over Montana and the western
high Plains ahead of a vigorous shortwave trough currently seen
moving through the Pacific northwest. This activity should
eventually grow upscale into a forward propagating MCS overnight
tonight as it works east across North Dakota, and works into
Minnesota toward daybreak. The CAMs are in decent agreement on the
evolution of this MCS, and generally take it north of our area.
However, the NSSLWRF and HighResWindow ARW are a bit south of the
other guidance, and suggest the need for at least some PoPs across
the northern portion of the area late tonight. In addition, some
convection is suggested in the area of warm advection along the 850
mb theta-e gradient farther east across the northern and eastern
portion of the forecast area (mainly near and north of I-94)
overnight. The HREF probabilities of 40 dBZ highlight this potential
nicely, and forecast PoPs for the overnight hours match up closely
with what it suggests. Forecast effective shear in that area
overnight is on the order of 25 to 30 kt so anything that develops
should be multi-cellular, but with elevated CAPE of around 2000 J/Kg
could see some isolated severe hail with any activity that manages
to get going in that area (although freezing levels near 14k ft
should keep things in check).

.LONG TERM...(Friday through Wednesday)
Issued at 352 AM CDT Thu Jun 28 2018

Heat followed by the potential for storms producing heavy rain
and severe weather are the primary concerns in the long term
period.

A surface trough circa 998 mb will be entering western MN on
Friday afternoon. This will put much of central and southern MN
and west central WI in the thermal ridge axis ahead of the cold
front. There's decent model agreement that H85 temps will soar to
around +25C on Friday afternoon. Southerly flow ahead of the
trough will supply deep mixing to most likely yield high
temperatures from 90 to 100 degrees across the area. Said readings
combined with progged dewpoints in the low to mid 70s will likely
yield peak heat indices from 100 to 110 degrees across much of
central and southern Minnesota and west central Wisconsin, where
we have issued an Excessive Heat Watch. Will watch model trends on
nocturnal convection on Thursday night to deduce whether
convective debris clouds/outflow boundaries would tame down
heating slightly.

Friday evening the cold front passes across the area. Prior to
that 700mb temperatures around +15C should inhibit convective
initiation. Will have plenty of instability build up by Friday
evening, and shear will be increasing with the arrival of a
shortwave trough.

The front looks to take its time progressing across the area as it
encounters ridging to the east. Storms look to re-ignite on
Saturday afternoon as the heights fall with the approaching mid-
upper trough, unfortunately in areas that have been very wet
recently over southern MN and west central WI. Precipitable water
values around 1.75 inches combined with sufficient shear will
bring a threat for heavy rainfall with the stronger storms.

Another wave arrives for Monday, so the holiday week looks to
start out wet. Semi-zonal flow persists through next week, so
while no major systems are progged, the progressive nature of the
pattern will make it difficult to guarantee a a dry forecast for
Independence Day.

&&

.AVIATION...(For the 18Z TAFS through 18Z Friday afternoon)
Issued at 1250 PM CDT Thu Jun 28 2018

VFR conditions are expected with a scattered cu field developing
this afternoon around 3000-5000 ft. An area of scattered
thunderstorms moving east out of SD may impact AXN & RWF this
afternoon but coverage should only be enough for a VCTS mention.
There is an unlikely but small chance for thunderstorms to develop
this afternoon across central MN & west-central MN but the chances
look too low to mention in the TAF this afternoon. A more likely
chance for thunderstorms comes around midnight for the eastern MN
& west-central WI terminals. Winds will pick up & become gusty
overnight with gusts up to 20 mph possible during the overnight
hours, & 25-30 mph towards tomorrow afternoon. Southeasterly winds
this afternoon become southerly tomorrow morning as the gusts
pick up.

KMSP...Can't rule out isolated thunderstorm activity this
afternoon but the chances look too low to mention in the TAF. More
likely chances come between 11pm-3am tonight but will leave
mention as VCTS due to uncertainty in coverage. Winds become
gusty overnight with southerly gusts of 25-30 mph possible during
the day tomorrow along with some wind shear in the lowest 2000 ft.

/OUTLOOK FOR KMSP/
Saturday...MVFR possible. SCT showers and thunderstorms.
Wind SW 10-15 kt.
Sunday...VFR. Wind W 5-15 kt.
Monday...VFR. Wind SW 5-10 kt.

&&

.MPX WATCHES/WARNINGS/ADVISORIES...
WI...Excessive Heat Watch from Friday morning through Friday evening
     for WIZ014>016-023>028.

MN...Excessive Heat Watch from Friday morning through Friday evening
     for MNZ044-045-049>053-057>063-065>070-073>078-082>085-
     091>093.

&&

UPDATE...
SHORT TERM...
LONG TERM...LS
AVIATION...ETA
Hazardous weather outlook, Jun 28, 11:48 AM CDT, 2 hours 58 minutes before
Hazardous Weather Outlook
National Weather Service Twin Cities/Chanhassen MN
1148 AM CDT Thu Jun 28 2018

MNZ041>045-047>070-073>078-082>085-091>093-WIZ014>016-023>028-
291700-
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-
1148 AM CDT Thu Jun 28 2018

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

.DAY ONE...This Afternoon and Tonight

Thunderstorms are possible later this afternoon over portions of
central Minnesota and across much of central MN and western WI
overnight. Large hail and strong wind gusts will be the main
severe weather threats with the stronger storms.

Flooding will continue along the Minnesota River and its
tributaries. Please refer to the Minnesota Department of
Transportation for any road closures due to flooding.

.DAYS TWO THROUGH SEVEN...Friday through Wednesday

Heat and humidity will build into the end of the week, peaking on
Friday, when dangerous heat indices above 100 degrees are likely.
The heat and humidity will be accompanied by an increasing threat
for thunderstorms, possibly severe, with heavy rainfall. At this
time the highest chance for severe storms looks to be on Friday
evening and Saturday. In addition to heavy rainfall, the main
threats would be large hail and damaging winds.

River flooding will continue along the Minnesota River and its
tributaries through the week. Please refer to the Minnesota
Department of Transportation for any road closures due to
flooding.

.SPOTTER INFORMATION STATEMENT...

SKYWARN spotter activation may be needed tonight.

The office that day

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

IssuedProductOfficeCountiesLasted
Jun 28, 2:24 AM CDTExcessive Heat WatchMPXAnoka, Benton, Blue Earth, Brown, Carver, Chisago and 27 more20 hr

Nearby

Excessive Heat Warnings in Minnesota, 2018Excessive Heat Warnings in Wisconsin, 2018Every excessive heat warning in 2018

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.