Alert archive / Minnesota / Severe Thunderstorm Warnings in 2018

Severe Thunderstorm Warning 129, NWS Twin Cities, MN

August 27, 20184 counties in Minnesota

NWS Twin Cities, MN issued this severe thunderstorm warning at Aug 27, 2018, 2:03 PM CDT for 4 counties in Minnesota. It was in force for 27 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: Aug 27, 2018, 2:03 PM CDT (19:03 UTC)
Expired: Aug 27, 2018, 2:30 PM CDT
In force: 27 min
Issued by: NWS Twin Cities, MN
Area: Storm-based polygon
Tornado: Possible
Hail: 1.0 in
Wind: 60.0 mph

Counties Benton County, MN, Isanti County, MN, Kanabec County, MN, Mille Lacs County, MN

The radar

The Minneapolis radar (KMPX), 101 km from the middle of the area, began a volume at 19:05 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, 7.1 hours before the alert went out and 101 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-p

Temperature in red, dew point in green, the mixed-layer parcel dashed.

Hodograph

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: 1465 J/kg
Mixed-layer CIN: -96 J/kg
Mixed-layer LCL: 698 m above ground
0-6 km bulk shear: 33 kt
0-1 km storm-relative helicity: 232 m²/s²
0-3 km storm-relative helicity: 249 m²/s²
Significant tornado parameter: 0.8
Supercell composite: 4.7

Open this sounding in Storm Lab

The text

As transmitted.

359 
WUUS53 KMPX 271903
SVRMPX
MNC009-059-065-095-271930-
/O.NEW.KMPX.SV.W.0129.180827T1903Z-180827T1930Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service Twin Cities/Chanhassen MN
203 PM CDT MON AUG 27 2018

The National Weather Service in The Twin Cities has issued a

* Severe Thunderstorm Warning for...
  Southern Kanabec County in east central Minnesota...
  Southern Mille Lacs County in east central Minnesota...
  Northwestern Isanti County in east central Minnesota...
  East central Benton County in central Minnesota...

* Until 230 PM CDT.

* At 202 PM CDT, a severe thunderstorm was located over Pease, or 23
  miles northwest of Cambridge, moving northeast at 45 mph.

  HAZARD...60 mph wind gusts and quarter size hail.

  SOURCE...Radar indicated.

  IMPACT...Hail damage to vehicles is expected. Expect wind damage 
           to roofs, siding, and trees.

* Locations impacted include...
  Princeton, Mora, Milaca, Brunswick, Foreston, Ogilvie, Grasston,
  Bock, Dalbo, Pease, Oak Park and Mora Airport.

This includes U.S. Highway 169 between mile markers 179 and 193.
 
PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

To report severe weather, contact your nearest law enforcement
agency. They will send your report to the National Weather Service
office in The Twin Cities.

&&

LAT...LON 4596 9324 4581 9314 4570 9314 4555 9372
      4556 9373 4571 9384
TIME...MOT...LOC 1902Z 244DEG 38KT 4567 9368 

TORNADO...POSSIBLE
HAIL...1.00IN
WIND...60MPH
 
$$

JLT

3 follow-up statements

376 
WWUS53 KMPX 271911
SVSMPX

Severe Weather Statement
National Weather Service Twin Cities/Chanhassen MN
211 PM CDT MON AUG 27 2018

MNC009-271920-
/O.CAN.KMPX.SV.W.0129.000000T0000Z-180827T1930Z/
Benton MN-
211 PM CDT MON AUG 27 2018

...THE SEVERE THUNDERSTORM WARNING FOR EAST CENTRAL BENTON COUNTY IS
CANCELLED...
    
The severe thunderstorm which prompted the warning has moved out of 
the warned area. Therefore, the warning has been cancelled.

LAT...LON 4596 9324 4581 9314 4570 9314 4557 9364
      4558 9370 4574 9377
TIME...MOT...LOC 1910Z 249DEG 34KT 4568 9358 

$$

MNC059-065-095-271930-
/O.CON.KMPX.SV.W.0129.000000T0000Z-180827T1930Z/
Kanabec MN-Mille Lacs MN-Isanti MN-
211 PM CDT MON AUG 27 2018

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 230 PM CDT
FOR SOUTHERN KANABEC...SOUTHERN MILLE LACS AND NORTHWESTERN ISANTI
COUNTIES...

At 210 PM CDT, a severe thunderstorm was located near Pease, or 19
miles northwest of Cambridge, moving east at 40 mph.

HAZARD...60 mph wind gusts and quarter size hail.

SOURCE...Radar indicated.

IMPACT...Hail damage to vehicles is expected. Expect wind damage to 
         roofs, siding, and trees.

Locations impacted include...
Princeton, Mora, Milaca, Brunswick, Foreston, Ogilvie, Grasston,
Bock, Dalbo, Pease, Mora Airport and Lewis Lake.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

To report severe weather contact your nearest law enforcement agency.
They will send your report to the National Weather Service office in
The Twin Cities.

&&

LAT...LON 4596 9324 4581 9314 4570 9314 4557 9364
      4558 9370 4574 9377
TIME...MOT...LOC 1910Z 249DEG 34KT 4568 9358 

TORNADO...POSSIBLE
HAIL...1.00IN
WIND...60MPH
 
$$

JLT

552 
WWUS53 KMPX 271921
SVSMPX

Severe Weather Statement
National Weather Service Twin Cities/Chanhassen MN
221 PM CDT MON AUG 27 2018

MNC059-065-095-271930-
/O.CON.KMPX.SV.W.0129.000000T0000Z-180827T1930Z/
Kanabec MN-Mille Lacs MN-Isanti MN-
221 PM CDT MON AUG 27 2018

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 230 PM CDT
FOR SOUTHERN KANABEC...SOUTHERN MILLE LACS AND NORTHWESTERN ISANTI
COUNTIES...

At 220 PM CDT, a severe thunderstorm was located near Dalbo, or 16
miles northwest of Cambridge, moving northeast at 45 mph.

HAZARD...60 mph wind gusts and quarter size hail.

SOURCE...Radar indicated.

IMPACT...Hail damage to vehicles is expected. Expect wind damage to 
         roofs, siding, and trees.

Locations impacted include...
Princeton, Mora, Milaca, Brunswick, Foreston, Ogilvie, Grasston,
Bock, Dalbo, Pease, Mora Airport and Lewis Lake.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

To report severe weather contact your nearest law enforcement agency.
They will send your report to the National Weather Service office in
The Twin Cities.

&&

LAT...LON 4596 9324 4581 9314 4570 9314 4557 9364
      4558 9370 4574 9377
TIME...MOT...LOC 1920Z 244DEG 38KT 4573 9343 

HAIL...1.00IN
WIND...60MPH
 
$$

JLT

222 
WWUS53 KMPX 271928
SVSMPX

Severe Weather Statement
National Weather Service Twin Cities/Chanhassen MN
228 PM CDT MON AUG 27 2018

MNC059-065-095-271937-
/O.EXP.KMPX.SV.W.0129.000000T0000Z-180827T1930Z/
Kanabec MN-Mille Lacs MN-Isanti MN-
228 PM CDT MON AUG 27 2018

...THE SEVERE THUNDERSTORM WARNING FOR SOUTHERN KANABEC...SOUTHERN
MILLE LACS AND NORTHWESTERN ISANTI COUNTIES WILL EXPIRE AT 230 PM
CDT...
                
The storm which prompted the warning has weakened below severe
limits, and no longer poses an immediate threat to life or property.
Therefore, the warning will be allowed to expire.  However small hail
and gusty winds are still possible with this thunderstorm.

LAT...LON 4596 9324 4581 9314 4570 9314 4557 9364
      4558 9370 4574 9377
TIME...MOT...LOC 1927Z 244DEG 38KT 4576 9333 

$$

JLT

The office that day

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

Issued	Product	Office	Counties	Lasted
Aug 27, 1:01 AM CDT	Special Weather Statement	MPX	Dakota	29 min
Aug 27, 1:53 AM CDT	Special Weather Statement	MPX	Goodhue	67 min
Aug 27, 1:44 PM CDT	Special Weather Statement	MPX	Benton	31 min
Aug 27, 3:17 PM CDT	Severe Thunderstorm Warning	MPX	Faribault, Martin, Watonwan	58 min
Aug 27, 3:38 PM CDT	Severe Thunderstorm Warning	MPX	Pope, Stearns, Todd	47 min
Aug 27, 3:52 PM CDT	Severe Thunderstorm Warning	MPX	Blue Earth, Faribault, Nicollet, Waseca	53 min
Aug 27, 4:14 PM CDT	Severe Thunderstorm Warning	MPX	Le Sueur, Nicollet, Rice, Scott, Sibley	61 min
Aug 27, 4:17 PM CDT	Special Weather Statement	MPX	Morrison	43 min
Aug 27, 4:35 PM CDT	Special Weather Statement	MPX	Benton, Sherburne	70 min
Aug 27, 4:42 PM CDT	Severe Thunderstorm Warning	MPX	Freeborn, Steele, Waseca	48 min
Aug 27, 5:02 PM CDT	Severe Thunderstorm Warning	MPX	Carver, Dakota, Hennepin, Ramsey, Scott, Washington	58 min
Aug 27, 5:05 PM CDT	Severe Thunderstorm Warning	MPX	Goodhue, Rice	55 min
Aug 27, 5:07 PM CDT	Special Weather Statement	MPX	Kanabec, Mille Lacs	38 min
Aug 27, 5:16 PM CDT	Tornado Warning	MPX	Goodhue, Rice	44 min
Aug 27, 5:32 PM CDT	Severe Thunderstorm Warning	MPX	Anoka, Hennepin, Isanti, Ramsey, Sherburne, Wright	43 min
Aug 27, 5:47 PM CDT	Severe Thunderstorm Warning	MPX	Goodhue	58 min
Aug 27, 5:54 PM CDT	Special Weather Statement	MPX	Freeborn	36 min
Aug 27, 6:03 PM CDT	Severe Thunderstorm Warning	MPX	Washington	57 min

Nearby

Severe Thunderstorm Warnings in Minnesota, 2018 Every 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.