Alert archive / Minnesota / Severe Thunderstorm Warnings in 2018

Severe Thunderstorm Warning 137, NWS Twin Cities, MN

August 27, 20186 counties in Minnesota

NWS Twin Cities, MN issued this severe thunderstorm warning at Aug 27, 2018, 5:32 PM CDT for 6 counties in Minnesota. It was in force for 43 min. 1 report came from inside the area while it was in force.

The area

The outline as issued, with what was reported inside it.

The facts

Issued: Aug 27, 2018, 5:32 PM CDT (22:32 UTC)
Expired: Aug 27, 2018, 6:15 PM CDT
In force: 43 min
Issued by: NWS Twin Cities, MN
Area: Storm-based polygon
Hail: 0.75 in
Wind: 60.0 mph

Counties Anoka County, MN, Hennepin County, MN, Isanti County, MN, Ramsey County, MN, Sherburne County, MN, Wright County, MN

The radar

The Minneapolis radar (KMPX), 58 km from the middle of the area, began a volume at 22:35 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.

What was reported inside it

Time	Report	Where	Remark
Aug 27, 5:50 PM CDT	TSTM WND DMG	Oak Grove, MN	TREE TRUNK SNAPPED NEAR BASE. OTHER LARGE LIMBS DOWN. TIME ESTIMATED FROM RADAR.

Local storm reports filed while the alert was in force, from inside its polygon or its counties.

The watch it was issued in

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

Issued	Product	Office	Lasted
Aug 27, 2:57 PM CDT	Severe Thunderstorm Watch	SPC	7 hr

The nearest sounding before it

Minneapolis, MN (KMPX), launched 12:00Z, 10.5 hours before the alert went out and 59 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.

238 
WUUS53 KMPX 272232
SVRMPX
MNC003-053-059-123-141-171-272315-
/O.NEW.KMPX.SV.W.0137.180827T2232Z-180827T2315Z/

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

The National Weather Service in The Twin Cities has issued a

* Severe Thunderstorm Warning for...
  East central Wright County in central Minnesota...
  Northern Hennepin County in east central Minnesota...
  Anoka County in east central Minnesota...
  Southern Isanti County in east central Minnesota...
  Eastern Sherburne County in central Minnesota...
  Northern Ramsey County in east central Minnesota...

* Until 615 PM CDT.

* At 532 PM CDT, severe thunderstorms were located along a line
  extending from Spencer Brook to near Elk River to near Hanover,
  moving east at 40 mph.

  HAZARD...60 mph wind gusts.

  SOURCE...Radar indicated.

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

* Severe thunderstorms will be near...
  Ramsey around 535 PM CDT.
  Andover and Champlin around 540 PM CDT.
  Maple Grove and Anoka around 545 PM CDT.
  Cambridge, Coon Rapids, Ham Lake and Isanti around 550 PM CDT.
  Brooklyn Park, Plymouth and East Bethel around 555 PM CDT.
  Blaine, Brooklyn Center and Lino Lakes around 600 PM CDT.
  Fridley, Columbia Heights, Mounds View and Spring Lake Park around 
  605 PM CDT.
  Shoreview and New Brighton around 610 PM CDT.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

LAT...LON 4556 9314 4555 9303 4513 9302 4512 9299
      4504 9298 4505 9346 4513 9381 4530 9366
      4556 9358 4556 9351 4557 9351
TIME...MOT...LOC 2232Z 286DEG 35KT 4553 9347 4528 9353 4517 9370 

HAIL...<.75IN
WIND...60MPH
 
$$

BORGHOFF

4 follow-up statements

414 
WWUS53 KMPX 272244
SVSMPX

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

MNC003-053-059-123-141-171-272315-
/O.CON.KMPX.SV.W.0137.000000T0000Z-180827T2315Z/
Wright MN-Hennepin MN-Anoka MN-Isanti MN-Sherburne MN-Ramsey MN-
544 PM CDT MON AUG 27 2018

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 615 PM CDT
FOR EAST CENTRAL WRIGHT...NORTHERN HENNEPIN...ANOKA...SOUTHERN
ISANTI...SOUTHEASTERN SHERBURNE AND NORTHERN RAMSEY COUNTIES...

At 544 PM CDT, severe thunderstorms were located along a line
extending from near Isanti to near Andover to near Corcoran, moving
east at 40 mph.

HAZARD...60 mph wind gusts.

SOURCE...Radar indicated.

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

These severe storms will be near...
  Cambridge, Coon Rapids, Andover and Isanti around 550 PM CDT.
  Brooklyn Park, Ham Lake and East Bethel around 555 PM CDT.
  Blaine, Brooklyn Center and Lino Lakes around 600 PM CDT.
  Fridley, Columbia Heights and Spring Lake Park around 605 PM CDT.
  Shoreview, New Brighton and Mounds View around 610 PM CDT.
  Vadnais Heights, Arden Hills and Mahtomedi around 615 PM CDT.

Other locations impacted by these severe thunderstorms include
Nowthen, Hanover, Crystal Airport, Spencer Brook, Hilltop, Oak Grove,
Athens, Cedar, Circle Pines and Dayton.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

LAT...LON 4556 9314 4555 9303 4513 9302 4512 9299
      4504 9298 4505 9346 4511 9374 4530 9358
      4556 9351 4557 9351
TIME...MOT...LOC 2244Z 286DEG 35KT 4550 9333 4525 9339 4514 9356 

HAIL...<.75IN
WIND...60MPH
 
$$

JRB

461 
WWUS53 KMPX 272300
SVSMPX

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

MNC141-171-272310-
/O.CAN.KMPX.SV.W.0137.000000T0000Z-180827T2315Z/
Wright MN-Sherburne MN-
600 PM CDT MON AUG 27 2018

...THE SEVERE THUNDERSTORM WARNING FOR EAST CENTRAL WRIGHT AND
SOUTHEASTERN SHERBURNE COUNTIES IS CANCELLED...

The storms which prompted the warning have moved out of the warned 
area. Therefore, the warning has been cancelled.

A Severe Thunderstorm Watch remains in effect until 1000 PM CDT for
east central Minnesota.

LAT...LON 4556 9314 4555 9303 4513 9302 4512 9299
      4504 9298 4505 9346 4509 9359 4528 9342
      4556 9328
TIME...MOT...LOC 2300Z 286DEG 35KT 4546 9314 4521 9320 4510 9337 

$$

MNC003-053-059-123-272315-
/O.CON.KMPX.SV.W.0137.000000T0000Z-180827T2315Z/
Hennepin MN-Anoka MN-Isanti MN-Ramsey MN-
600 PM CDT MON AUG 27 2018

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 615 PM CDT
FOR NORTHEASTERN HENNEPIN...ANOKA...SOUTHEASTERN ISANTI AND NORTHERN
RAMSEY COUNTIES...

At 600 PM CDT, severe thunderstorms were located along a line
extending from Weber to near Blaine to Brooklyn Park, moving east at
40 mph.

HAZARD...60 mph wind gusts.

SOURCE...Radar indicated.

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

These severe storms will be near...
  Lino Lakes around 605 PM CDT.
  Shoreview around 610 PM CDT.
  New Brighton, Vadnais Heights, Arden Hills and Mahtomedi around 
  615 PM CDT.

Other locations impacted by these severe thunderstorms include
Crystal Airport, Hilltop, Oak Grove, Athens, Cedar, Circle Pines,
Dayton, Lexington, Centerville and North Oaks.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

LAT...LON 4556 9314 4555 9303 4513 9302 4512 9299
      4504 9298 4505 9346 4509 9359 4528 9342
      4556 9328
TIME...MOT...LOC 2300Z 286DEG 35KT 4546 9314 4521 9320 4510 9337 

HAIL...<.75IN
WIND...60MPH
 
$$

JRB

084 
WWUS53 KMPX 272307
SVSMPX

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

MNC003-053-059-123-272315-
/O.CON.KMPX.SV.W.0137.000000T0000Z-180827T2315Z/
Hennepin MN-Anoka MN-Isanti MN-Ramsey MN-
607 PM CDT MON AUG 27 2018

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 615 PM CDT
FOR NORTHEASTERN HENNEPIN...EASTERN ANOKA...SOUTHEASTERN ISANTI AND
NORTHERN RAMSEY COUNTIES...

At 606 PM CDT, severe thunderstorms were located along a line
extending from near Weber to near Lino Lakes to Brooklyn Center,
moving east at 40 mph.

HAZARD...60 mph wind gusts.

SOURCE...Radar indicated.

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

These severe storms will be near...
  Lino Lakes around 610 PM CDT.
  Vadnais Heights around 615 PM CDT.

Other locations impacted by these severe thunderstorms include
Crystal Airport, Hilltop, Circle Pines, Lexington, Centerville, North
Oaks, Gem Lake, Spring Lake, Blaine Airport and Weber.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

LAT...LON 4556 9314 4555 9303 4513 9302 4512 9299
      4504 9298 4505 9346 4529 9319
TIME...MOT...LOC 2306Z 270DEG 35KT 4545 9308 4520 9314 4509 9331 

HAIL...<.75IN
WIND...60MPH
 
$$

JRB

312 
WWUS53 KMPX 272310
SVSMPX

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

MNC003-053-059-123-272319-
/O.EXP.KMPX.SV.W.0137.000000T0000Z-180827T2315Z/
Hennepin MN-Anoka MN-Isanti MN-Ramsey MN-
610 PM CDT MON AUG 27 2018

...THE SEVERE THUNDERSTORM WARNING FOR NORTHEASTERN HENNEPIN...
EASTERN ANOKA...SOUTHEASTERN ISANTI AND NORTHERN RAMSEY COUNTIES WILL
EXPIRE AT 615 PM CDT...

The storms which prompted the warning have moved out of the warned 
area. Therefore, the warning will be allowed to expire.

A Severe Thunderstorm Watch remains in effect until 1000 PM CDT for
east central Minnesota.

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

LAT...LON 4556 9314 4555 9303 4513 9302 4512 9299
      4504 9298 4505 9346 4529 9319
TIME...MOT...LOC 2309Z 286DEG 35KT 4544 9305 4519 9311 4508 9328 

$$

JRB

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, 2:03 PM CDT	Severe Thunderstorm Warning	MPX	Benton, Isanti, Kanabec, Mille Lacs	27 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, 5:47 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; local storm reports from the same archive; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.