Alert archive / Minnesota / Severe Thunderstorm Warnings in 2018

Severe Thunderstorm Warning 102, NWS Twin Cities, MN

July 12, 2018Goodhue County, Minnesota

NWS Twin Cities, MN issued this severe thunderstorm warning at Jul 12, 2018, 8:12 PM CDT for Goodhue County, Minnesota. It was in force for 33 min. No storm report in the archive falls inside the area while it was in force.

The area

The outline as issued.

The facts

Issued
Jul 12, 2018, 8:12 PM CDT (01:12 UTC)
Expired
Jul 12, 2018, 8:45 PM CDT
In force
33 min
Issued by
NWS Twin Cities, MN
Area
Storm-based polygon
Hail
0.75 in
Wind
60.0 mph

County Goodhue County, MN

The radar

The Minneapolis radar (KMPX), 95 km from the middle of the area, began a volume at 01:14 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 watch it was issued in

The SPC watch in force over the same counties when this warning went out.

IssuedProductOfficeLasted
Jul 12, 5:04 PM CDTSevere Thunderstorm WatchSPC7 hr

The nearest sounding before it

Minneapolis, MN (KMPX), launched 00:00Z, 1.2 hours before the alert went out and 98 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 2018-07-13Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 487 joules per kilogram.LCLLFCEL10008507005003002001001 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 2018-07-13The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity -75 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
487 J/kg
Mixed-layer CIN
-170 J/kg
Mixed-layer LCL
876 m above ground
0-6 km bulk shear
39 kt
0-1 km storm-relative helicity
-75 m²/s²
0-3 km storm-relative helicity
69 m²/s²
Significant tornado parameter
0.0
Supercell composite
1.1

Open this sounding in Storm Lab

The text

As transmitted.

757 
WUUS53 KMPX 130112
SVRMPX
MNC049-130145-
/O.NEW.KMPX.SV.W.0102.180713T0112Z-180713T0145Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service Twin Cities/Chanhassen MN
812 PM CDT THU JUL 12 2018

The National Weather Service in The Twin Cities has issued a

* Severe Thunderstorm Warning for...
  Southern Goodhue County in southeastern Minnesota...

* Until 845 PM CDT.

* At 812 PM CDT, severe thunderstorms were located along a line
  extending from Vasa to near Bombay, moving east at 35 mph.

  HAZARD...60 mph wind gusts.

  SOURCE...Radar indicated.

  IMPACT...Expect damage to roofs, siding, and trees.

* Locations impacted include...
  Pine Island, Zumbrota, Goodhue, Wanamingo, Vasa, Bellechester,
  Bombay, Wastedo, Central Point and Hader.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

For your protection move to an interior room on the lowest floor of a
building.

Torrential rainfall is occurring with these storms, and may lead to
flash flooding. Do not drive your vehicle through flooded roadways.

&&

LAT...LON 4425 9298 4452 9278 4448 9229 4446 9225
      4445 9226 4445 9243 4437 9243 4436 9255
      4420 9256 4420 9279
TIME...MOT...LOC 0112Z 275DEG 28KT 4450 9269 4425 9287 

HAIL...<.75IN
WIND...60MPH
 
$$
2 follow-up statements
126 
WWUS53 KMPX 130127
SVSMPX

Severe Weather Statement
National Weather Service Twin Cities/Chanhassen MN
827 PM CDT THU JUL 12 2018

MNC049-130145-
/O.CON.KMPX.SV.W.0102.000000T0000Z-180713T0145Z/
Goodhue MN-
827 PM CDT THU JUL 12 2018

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 845 PM CDT
FOR SOUTHEASTERN GOODHUE COUNTY...

At 827 PM CDT, severe thunderstorms were located along a line
extending from near Red Wing to near Pine Island, moving east at 40
mph.

HAZARD...60 mph wind gusts.

SOURCE...Radar indicated.

IMPACT...Expect damage to roofs, siding, and trees.

Locations impacted include...
Pine Island, Zumbrota, Goodhue, Wanamingo, Bellechester and Central
Point.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

For your protection move to an interior room on the lowest floor of a
building.

Torrential rainfall is occurring with these storms, and may lead to
flash flooding. Do not drive your vehicle through flooded roadways.

&&

LAT...LON 4451 9267 4448 9229 4446 9225 4445 9226
      4445 9243 4437 9243 4436 9255 4420 9256
      4420 9279 4422 9286
TIME...MOT...LOC 0127Z 272DEG 37KT 4449 9251 4424 9269 

HAIL...<.75IN
WIND...60MPH
 
$$
046 
WWUS53 KMPX 130140
SVSMPX

Severe Weather Statement
National Weather Service Twin Cities/Chanhassen MN
840 PM CDT THU JUL 12 2018

MNC049-130149-
/O.EXP.KMPX.SV.W.0102.000000T0000Z-180713T0145Z/
Goodhue MN-
840 PM CDT THU JUL 12 2018

...THE SEVERE THUNDERSTORM WARNING FOR SOUTHEASTERN GOODHUE COUNTY
WILL EXPIRE AT 845 PM CDT...
    
The storms which prompted the warning have weakened below severe
limits, and have exited the warned area. Therefore, the warning will
be allowed to expire.  However gusty winds and heavy rain are still
possible with these thunderstorms.

A Severe Thunderstorm Watch remains in effect until midnight CDT for
southeastern Minnesota...and west central Wisconsin.

LAT...LON 4451 9267 4448 9229 4446 9225 4445 9226
      4445 9243 4437 9243 4436 9255 4420 9256
      4420 9279 4422 9286
TIME...MOT...LOC 0139Z 275DEG 28KT 4448 9240 4423 9258 

$$

The office that day

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

IssuedProductOfficeCountiesLasted
Jul 12, 7:06 PM CDTSevere Thunderstorm WarningMPXGoodhue54 min
Jul 12, 8:00 PM CDTSpecial Weather StatementMPXGoodhue45 min
Jul 13, 9:48 AM CDTAreal Flood WarningMPXKanabec5 days

Nearby

Severe Thunderstorm Warnings in Minnesota, 2018Every severe thunderstorm 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.