Alert archive / Minnesota / Severe Thunderstorm Warnings in 2017

Severe Thunderstorm Warning 149, NWS Twin Cities, MN

July 12, 20175 counties in Minnesota

NWS Twin Cities, MN issued this severe thunderstorm warning at Jul 12, 2017, 1:44 AM CDT for 5 counties in Minnesota. It was in force for 46 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: Jul 12, 2017, 1:44 AM CDT (06:44 UTC)
Expired: Jul 12, 2017, 2:30 AM CDT
In force: 46 min
Issued by: NWS Twin Cities, MN
Area: Storm-based polygon
Hail: 0.75 in
Wind: 60.0 mph

Counties Anoka County, MN, Benton County, MN, Isanti County, MN, Mille Lacs County, MN, Sherburne County, MN

The radar

The Minneapolis radar (KMPX), 80 km from the middle of the area, began a volume at 06:49 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.

What was reported inside it

Time	Report	Where	Remark
Jul 12, 2:13 AM CDT	TSTM WND DMG	St. Francis, MN	TREES DOWN, TIME ESTIMATED.

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
Jul 11, 10:00 PM CDT	Severe Thunderstorm Watch	SPC	6 hr

The nearest sounding before it

Minneapolis, MN (KMPX), launched 00:00Z, 6.7 hours before the alert went out and 79 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: 913 J/kg
Mixed-layer CIN: -179 J/kg
Mixed-layer LCL: 1279 m above ground
0-6 km bulk shear: 41 kt
0-1 km storm-relative helicity: 86 m²/s²
0-3 km storm-relative helicity: 202 m²/s²
Significant tornado parameter: 0.1
Supercell composite: 4.0

Open this sounding in Storm Lab

The text

As transmitted.

741 
WUUS53 KMPX 120644
SVRMPX
MNC003-009-059-095-141-120730-
/O.NEW.KMPX.SV.W.0149.170712T0644Z-170712T0730Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service Twin Cities/Chanhassen MN
144 AM CDT WED JUL 12 2017

The National Weather Service in The Twin Cities has issued a

* Severe Thunderstorm Warning for...
  Southern Mille Lacs County in east central Minnesota...
  Northwestern Anoka County in east central Minnesota...
  Isanti County in east central Minnesota...
  Southeastern Benton County in central Minnesota...
  Sherburne County in central Minnesota...

* Until 230 AM CDT

* At 143 AM CDT, severe thunderstorms were located along a line
  extending from near Bock to near Pease to near St Augusta, moving
  southeast at 40 mph.

  HAZARD...60 mph wind gusts. 

  SOURCE...Radar indicated. 

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

* Severe thunderstorms will be near,
  Princeton around 150 AM CDT. 
  Becker around 205 AM CDT. 
  Monticello around 210 AM CDT. 
  Cambridge, Big Lake and Isanti around 215 AM CDT. 
  East Bethel around 220 AM CDT. 
  Otsego around 230 AM CDT. 

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

LAT...LON 4578 9351 4573 9351 4574 9335 4566 9314
      4542 9315 4529 9361 4530 9377 4534 9387
      4539 9392 4540 9402 4550 9415 4557 9417
      4571 9373 4581 9360
TIME...MOT...LOC 0643Z 311DEG 37KT 4579 9349 4564 9362 4550 9416 

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

BORGHOFF

4 follow-up statements

250 
WUUS53 KMPX 120647 CCA
SVRMPX
MNC003-009-059-095-141-120730-
/O.COR.KMPX.SV.W.0149.170712T0644Z-170712T0730Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service Twin Cities/Chanhassen MN
147 AM CDT WED JUL 12 2017

The National Weather Service in The Twin Cities has issued a

* Severe Thunderstorm Warning for...
  Southern Mille Lacs County in east central Minnesota...
  Northwestern Anoka County in east central Minnesota...
  Isanti County in east central Minnesota...
  Southeastern Benton County in central Minnesota...
  Sherburne County in central Minnesota...

* Until 230 AM CDT

* At 146 AM CDT, severe thunderstorms were located along a line
  extending from near Bock to near Princeton to near St Augusta,
  moving southeast at 45 mph.

  HAZARD...60 mph wind gusts. 

  SOURCE...Radar indicated. 

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

* Severe thunderstorms will be near,
  Princeton and Bock around 150 AM CDT. 
  Becker around 205 AM CDT. 
  Monticello around 210 AM CDT. 
  Cambridge, Big Lake and Isanti around 215 AM CDT. 
  East Bethel around 220 AM CDT. 
  Otsego around 230 AM CDT. 

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

LAT...LON 4578 9351 4573 9351 4574 9335 4566 9314
      4542 9315 4529 9361 4530 9377 4534 9387
      4539 9392 4540 9402 4550 9415 4557 9417
      4571 9373 4581 9360
TIME...MOT...LOC 0646Z 311DEG 37KT 4579 9349 4564 9362 4550 9416 

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

BORGHOFF

907 
WWUS53 KMPX 120659
SVSMPX

Severe Weather Statement
National Weather Service Twin Cities/Chanhassen MN
159 AM CDT WED JUL 12 2017

MNC009-120708-
/O.CAN.KMPX.SV.W.0149.000000T0000Z-170712T0730Z/
Benton MN-
159 AM CDT WED JUL 12 2017

...THE SEVERE THUNDERSTORM WARNING FOR SOUTHEASTERN BENTON COUNTY 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 400 AM CDT for
central and east central Minnesota.

LAT...LON 4573 9345 4574 9335 4566 9314 4542 9315
      4529 9361 4530 9377 4534 9387 4539 9392
      4540 9402 4544 9407 4553 9374 4561 9354
TIME...MOT...LOC 0658Z 319DEG 39KT 4566 9338 4551 9351 4538 9397 

$$

MNC003-059-095-141-120730-
/O.CON.KMPX.SV.W.0149.000000T0000Z-170712T0730Z/
Mille Lacs MN-Anoka MN-Isanti MN-Sherburne MN-
159 AM CDT WED JUL 12 2017

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 230 AM CDT
FOR SOUTH CENTRAL MILLE LACS...NORTHWESTERN ANOKA...ISANTI AND
SHERBURNE COUNTIES...

At 158 AM CDT, severe thunderstorms were located along a line
extending from near Dalbo to near Spencer Brook to Hasty, moving
southeast at 45 mph.

HAZARD...60 mph wind gusts. 

SOURCE...Radar indicated. 

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

These severe storms will be near...
  St. Francis around 205 AM CDT. 
  Big Lake around 210 AM CDT. 
  Cambridge and Isanti around 215 AM CDT. 
  East Bethel around 225 AM CDT. 

Other locations impacted by these severe thunderstorms include
Sherburne National Wildlife Refuge, Grandy, Orrock, Spencer Brook,
Dalbo, Bodum, Athens, Bethel, Stanchfield and Cambridge Airport.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

LAT...LON 4573 9345 4574 9335 4566 9314 4542 9315
      4529 9361 4530 9377 4534 9387 4539 9392
      4540 9402 4544 9407 4553 9374 4561 9354
TIME...MOT...LOC 0658Z 319DEG 39KT 4566 9338 4551 9351 4538 9397 

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

BORGHOFF

951 
WWUS53 KMPX 120711
SVSMPX

Severe Weather Statement
National Weather Service Twin Cities/Chanhassen MN
211 AM CDT WED JUL 12 2017

MNC095-120721-
/O.CAN.KMPX.SV.W.0149.000000T0000Z-170712T0730Z/
Mille Lacs MN-
211 AM CDT WED JUL 12 2017

...THE SEVERE THUNDERSTORM WARNING FOR SOUTH CENTRAL MILLE LACS
COUNTY 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 400 AM CDT for
central and east central Minnesota.

LAT...LON 4532 9383 4544 9342 4565 9323 4561 9314
      4542 9315 4529 9361 4530 9377
TIME...MOT...LOC 0711Z 313DEG 42KT 4556 9324 4541 9337 4528 9383 

$$

MNC003-059-141-120730-
/O.CON.KMPX.SV.W.0149.000000T0000Z-170712T0730Z/
Anoka MN-Isanti MN-Sherburne MN-
211 AM CDT WED JUL 12 2017

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 230 AM CDT
FOR NORTHWESTERN ANOKA...SOUTH CENTRAL ISANTI AND SOUTHEASTERN
SHERBURNE COUNTIES...

At 211 AM CDT, severe thunderstorms were located along a line
extending from Cambridge to St. Francis to near Monticello, moving
southeast at 50 mph.

HAZARD...60 mph wind gusts. 

SOURCE...Radar indicated. 

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

These severe storms will be near...
  Cambridge and Isanti around 215 AM CDT. 
  East Bethel around 220 AM CDT. 
  Otsego around 225 AM CDT. 

Other locations impacted by these severe thunderstorms include Bodum,
Athens, Bethel, Cambridge Airport and Oak Grove.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

LAT...LON 4532 9383 4544 9342 4565 9323 4561 9314
      4542 9315 4529 9361 4530 9377
TIME...MOT...LOC 0711Z 313DEG 42KT 4556 9324 4541 9337 4528 9383 

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

BORGHOFF

240 
WWUS53 KMPX 120727
SVSMPX

Severe Weather Statement
National Weather Service Twin Cities/Chanhassen MN
227 AM CDT WED JUL 12 2017

MNC003-059-141-120737-
/O.EXP.KMPX.SV.W.0149.000000T0000Z-170712T0730Z/
Anoka MN-Isanti MN-Sherburne MN-
227 AM CDT WED JUL 12 2017

...THE SEVERE THUNDERSTORM WARNING FOR NORTHWESTERN ANOKA...SOUTH
CENTRAL ISANTI AND SOUTHEASTERN SHERBURNE COUNTIES WILL EXPIRE AT 230
AM 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.

A severe thunderstorm watch remains in effect until 400 AM CDT for
central and east central Minnesota.

LAT...LON 4532 9383 4544 9342 4565 9323 4561 9314
      4542 9315 4529 9361 4530 9377
TIME...MOT...LOC 0727Z 311DEG 37KT 4547 9309 4532 9322 4519 9368 

$$

BORGHOFF

The office that day

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

Issued	Product	Office	Counties	Lasted
Jul 11, 11:02 PM CDT	Special Weather Statement	MPX	Swift	28 min
Jul 11, 11:14 PM CDT	Severe Thunderstorm Warning	MPX	Douglas	46 min
Jul 11, 11:27 PM CDT	Severe Thunderstorm Warning	MPX	Pope	33 min
Jul 11, 11:59 PM CDT	Severe Thunderstorm Warning	MPX	Douglas, Pope, Stearns, Todd	46 min
Jul 12, 12:10 AM CDT	Severe Thunderstorm Warning	MPX	Mille Lacs, Morrison	35 min
Jul 12, 12:45 AM CDT	Severe Thunderstorm Warning	MPX	Douglas, Pope, Stearns, Todd	21 min
Jul 12, 12:46 AM CDT	Severe Thunderstorm Warning	MPX	Kanabec, Mille Lacs	44 min
Jul 12, 2:27 AM CDT	Special Weather Statement	MPX	Anoka, Ramsey, Washington	33 min
Jul 12, 2:48 AM CDT	Severe Thunderstorm Warning	MPX	Dakota, Ramsey, Washington	27 min

Nearby

Severe Thunderstorm Warnings in Minnesota, 2017 Every severe thunderstorm warning 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; local storm reports from the same archive; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.