Alert archive / Wisconsin / Frost Advisories in 2017

Frost Advisory 1, NWS Twin Cities, MN

May 6, 2017Chippewa County, Eau Claire County, Wisconsin

NWS Twin Cities, MN issued this frost advisory at May 6, 2017, 2:55 AM CDT for Chippewa County, Eau Claire County, Wisconsin. It took effect at May 7, 2017, 2:00 AM CDT. It was in force for 6 hr.

The area

The counties it named.

The facts

Issued
May 6, 2017, 2:55 AM CDT (07:55 UTC)
In effect from
May 7, 2017, 2:00 AM CDT
Expired
May 7, 2017, 8:00 AM CDT
In force
6 hr
Issued by
NWS Twin Cities, MN

Counties Chippewa County, WI, Eau Claire County, WI

The radar

The La Crosse radar (KARX), 120 km from the middle of the area, began a volume at 07:56 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 00:00Z, 7.9 hours before the alert went out and 183 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 00:00Z on 2017-05-06Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 5 joules per kilogram.LCLEL10008507005003002001001 km2 km3 km6 km9 km12 km15 km-30°-20°-10°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Minneapolis, MN at 00:00Z on 2017-05-06The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 168 square meters per square second.1939587897Sfc1 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
5 J/kg
Mixed-layer CIN
-7 J/kg
Mixed-layer LCL
3011 m above ground
0-6 km bulk shear
60 kt
0-1 km storm-relative helicity
168 m²/s²
0-3 km storm-relative helicity
220 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.0

Open this sounding in Storm Lab

The text

As transmitted.

463 
WWUS73 KMPX 060755
NPWMPX

URGENT - WEATHER MESSAGE
National Weather Service Twin Cities/Chanhassen MN
255 AM CDT Sat May 6 2017

WIZ027-028-061600-
/O.NEW.KMPX.FR.Y.0001.170507T0700Z-170507T1300Z/
Chippewa-Eau Claire-
Including the cities of Chippewa Falls and Eau Claire
255 AM CDT Sat May 6 2017

...FROST ADVISORY IN EFFECT FROM 2 AM TO 8 AM CDT SUNDAY...

The National Weather Service in Twin Cities/Chanhassen has issued
a Frost Advisory, which is in effect from 2 AM to 8 AM CDT
Sunday. 

* TEMPERATURE...32 to 35 degrees.

* IMPACTS...sensitive vegetation may be impacted by cold
  temperatures if precautions are not taken.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A Frost Advisory means that widespread frost is expected.
Sensitive outdoor plants may be killed if left uncovered.

&&

$$
3 follow-up statements
248 
WWUS73 KMPX 061621
NPWMPX

URGENT - WEATHER MESSAGE
National Weather Service Twin Cities/Chanhassen MN
1121 AM CDT Sat May 6 2017


WIZ027-028-070430-
/O.CON.KMPX.FR.Y.0001.170507T0700Z-170507T1300Z/
Chippewa-Eau Claire-
Including the cities of Chippewa Falls and Eau Claire
1121 AM CDT Sat May 6 2017

...FROST ADVISORY REMAINS IN EFFECT FROM 2 AM TO 8 AM CDT
SUNDAY...

* TEMPERATURE...32 to 35 degrees.

* IMPACTS...sensitive vegetation may be impacted by cold 
  temperatures if precautions are not taken. 

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A Frost Advisory means that widespread frost is expected.
Sensitive outdoor plants may be killed if left uncovered.

&&

$$
255 
WWUS73 KMPX 070239
NPWMPX

URGENT - WEATHER MESSAGE
National Weather Service Twin Cities/Chanhassen MN
939 PM CDT Sat May 6 2017

WIZ027-028-071100-
/O.CON.KMPX.FR.Y.0001.170507T0700Z-170507T1300Z/
Chippewa-Eau Claire-
Including the cities of Chippewa Falls and Eau Claire
939 PM CDT Sat May 6 2017

...FROST ADVISORY REMAINS IN EFFECT FROM 2 AM TO 8 AM CDT
SUNDAY...

* TEMPERATURE...32 to 35 degrees.

* IMPACTS...sensitive vegetation may be impacted by cold 
  temperatures if precautions are not taken. 

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A Frost Advisory means that widespread frost is expected.
Sensitive outdoor plants may be killed if left uncovered.

&&

$$
850 
WWUS73 KMPX 070850
NPWMPX

URGENT - WEATHER MESSAGE
National Weather Service Twin Cities/Chanhassen MN
350 AM CDT Sun May 7 2017

WIZ027-028-071300-
/O.CON.KMPX.FR.Y.0001.000000T0000Z-170507T1300Z/
Chippewa-Eau Claire-
Including the cities of Chippewa Falls and Eau Claire
350 AM CDT Sun May 7 2017

...FROST ADVISORY REMAINS IN EFFECT UNTIL 8 AM CDT THIS MORNING...

* TEMPERATURE...32 to 35 degrees.

* IMPACTS...sensitive vegetation may be impacted by cold 
  temperatures if precautions are not taken. 

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A Frost Advisory means that widespread frost is expected.
Sensitive outdoor plants may be killed if left uncovered.

&&

$$

Nearby

Frost Advisories in Wisconsin, 2017Every frost advisory in 2017

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.