Alert archive / Minnesota / Severe Thunderstorm Warnings in 2015

Severe Thunderstorm Warning 55, NWS Twin Cities, MN

June 29, 2015Saint Croix County, Wisconsin; Anoka County, Ramsey County, Washington County, Minnesota

NWS Twin Cities, MN issued this severe thunderstorm warning at Jun 29, 2015, 6:28 PM CDT for Saint Croix County, Wisconsin; Anoka County, Ramsey County, Washington County, Minnesota. It was in force for 47 min. 8 reports 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
Jun 29, 2015, 6:28 PM CDT (23:28 UTC)
Expired
Jun 29, 2015, 7:15 PM CDT
In force
47 min
Issued by
NWS Twin Cities, MN
Area
Storm-based polygon
Hail
1.25 in
Wind
50.0 mph

Counties Anoka County, MN, Ramsey County, MN, Washington County, MN, Saint Croix County, WI

The radar

The Minneapolis radar (KMPX), 53 km from the middle of the area, began a volume at 23:27 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

TimeReportWhereRemark
Jun 29, 6:30 PM CDTHAIL 13 Se Hugo, MN
Jun 29, 6:30 PM CDTHAIL 15 E Ham Lake, MNOCCURRED IN COLUMBUS.
Jun 29, 6:37 PM CDTHAIL 1.52 Ese Ham Lake, MN
Jun 29, 6:40 PM CDTHAIL 0.5Hugo, MNOCCURRED NEAR I-35 AND COUNTY ROAD 14.
Jun 29, 6:50 PM CDTHAIL 0.75Lino Lakes, MNOCCURRED NEAR HIGHWAY 23 AND 35W.
Jun 29, 6:50 PM CDTHAIL 1.5Lilydale, MN
Jun 29, 6:50 PM CDTHAIL 1.5Lino Lakes, MN
Jun 29, 6:51 PM CDTHAIL 0.75Lino Lakes, MN

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.

IssuedProductOfficeLasted
Jun 29, 1:57 PM CDTSevere Thunderstorm WatchSPC8 hr

The nearest sounding before it

Minneapolis, MN (KMPX), launched 12:00Z, 11.5 hours before the alert went out and 56 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 12:00Z on 2015-06-29Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 160 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 12:00Z on 2015-06-29The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 55 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
160 J/kg
Mixed-layer CIN
-46 J/kg
Mixed-layer LCL
1297 m above ground
0-6 km bulk shear
41 kt
0-1 km storm-relative helicity
55 m²/s²
0-3 km storm-relative helicity
86 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.4

Open this sounding in Storm Lab

The text

As transmitted, in the capitals the NWS used until 2016.

973 
WUUS53 KMPX 292328
SVRMPX
MNC003-123-163-WIC109-300015-
/O.NEW.KMPX.SV.W.0055.150629T2328Z-150630T0015Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE TWIN CITIES/CHANHASSEN MN
628 PM CDT MON JUN 29 2015

THE NATIONAL WEATHER SERVICE IN THE TWIN CITIES HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  EASTERN RAMSEY COUNTY IN EAST CENTRAL MINNESOTA...
  WASHINGTON COUNTY IN EAST CENTRAL MINNESOTA...
  EAST CENTRAL ANOKA COUNTY IN EAST CENTRAL MINNESOTA...
  SOUTHWESTERN ST. CROIX COUNTY IN WEST CENTRAL WISCONSIN...

* UNTIL 715 PM CDT

* AT 627 PM CDT...SEVERE THUNDERSTORMS WERE LOCATED ALONG A LINE
  EXTENDING FROM NEAR HAM LAKE TO NEAR FOREST LAKE TO NEAR GRANT...
  MOVING SOUTH AT 35 MPH.

  HAZARD...HALF DOLLAR SIZE HAIL. 

  SOURCE...TRAINED WEATHER SPOTTERS. 

  IMPACT...DAMAGE TO VEHICLES IS EXPECTED. 

* SEVERE THUNDERSTORMS WILL BE NEAR...
  STILLWATER AROUND 635 PM CDT.
  HUGO...LAKE ELMO AND BAYPORT AROUND 640 PM CDT.
  SHOREVIEW...HUDSON...MAHTOMEDI AND NORTH HUDSON AROUND 645 PM CDT.
  VADNAIS HEIGHTS AROUND 655 PM CDT.
  WOODBURY...MAPLEWOOD...OAKDALE AND WHITE BEAR LAKE AROUND 700 PM
  CDT.
  ST. PAUL AND AFTON AROUND 705 PM CDT.
  SOUTH ST. PAUL AROUND 710 PM CDT.
  COTTAGE GROVE AROUND 715 PM CDT.

OTHER LOCATIONS IMPACTED BY THESE SEVERE THUNDERSTORMS INCLUDE
LAKELAND...LAKE ELMO AIRPORT...LAKELAND SHORES...ST MARYS POINT...
NORTH ST. PAUL...BIRCHWOOD...LEXINGTON...LANDFALL...LAKE ST CROIX
BEACH AND NORTH OAKS.

THIS INCLUDES THE FOLLOWING HIGHWAYS...
 INTERSTATE 35 BETWEEN MILE MARKERS 128 AND 130.
 INTERSTATE 94 IN MINNESOTA BETWEEN MILE MARKERS 245 AND 258.
 INTERSTATE 94 IN WISCONSIN BETWEEN MILE MARKERS 1 AND 2.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

FOR YOUR PROTECTION MOVE TO AN INTERIOR ROOM ON THE LOWEST FLOOR OF A
BUILDING.

&&

LAT...LON 4526 9294 4511 9277 4486 9266 4486 9292
      4488 9302 4504 9307 4517 9320 4530 9325
TIME...MOT...LOC 2327Z 345DEG 29KT 4529 9310 4523 9297 4513 9287 

HAIL...1.25IN
WIND...<50MPH
 
$$

BORGHOFF
1 follow-up statement
485 
WWUS53 KMPX 292352
SVSMPX

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE TWIN CITIES/CHANHASSEN MN
652 PM CDT MON JUN 29 2015

WIC109-300002-
/O.CAN.KMPX.SV.W.0055.000000T0000Z-150630T0015Z/
ST. CROIX WI-
652 PM CDT MON JUN 29 2015

...THE SEVERE THUNDERSTORM WARNING FOR SOUTHWESTERN ST. CROIX 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 800 PM CDT FOR
EAST CENTRAL MINNESOTA AND WEST CENTRAL WISCONSIN.

LAT...LON 4530 9325 4523 9306 4510 9295 4501 9282
      4486 9276 4486 9292 4488 9302 4504 9307
      4517 9320
TIME...MOT...LOC 2352Z 353DEG 23KT 4516 9309 4497 9290 

$$

MNC003-123-163-300015-
/O.CON.KMPX.SV.W.0055.000000T0000Z-150630T0015Z/
RAMSEY MN-WASHINGTON MN-ANOKA MN-
652 PM CDT MON JUN 29 2015

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 715 PM CDT
FOR EASTERN RAMSEY...SOUTHERN WASHINGTON AND EAST CENTRAL ANOKA
COUNTIES...

AT 652 PM CDT...SEVERE THUNDERSTORMS WERE LOCATED ALONG A LINE
EXTENDING FROM LINO LAKES TO LAKE ELMO...MOVING SOUTH AT 25 MPH.

HAZARD...QUARTER SIZE HAIL. 

SOURCE...RADAR INDICATED. 

IMPACT...DAMAGE TO VEHICLES IS EXPECTED. 

THESE SEVERE STORMS WILL BE NEAR...
  WOODBURY...LAKE ELMO AND AFTON AROUND 655 PM CDT.
  MAPLEWOOD...COTTAGE GROVE AND OAKDALE AROUND 710 PM CDT.
  ST. PAUL AND SOUTH ST. PAUL AROUND 715 PM CDT.

OTHER LOCATIONS IMPACTED BY THESE SEVERE THUNDERSTORMS INCLUDE LAKE
ELMO AIRPORT...NORTH ST. PAUL...BIRCHWOOD...LEXINGTON...LANDFALL...
NORTH OAKS...CIRCLE PINES...PINE SPRINGS...GRANT AND ST PAUL
BATTLECREEK REGIONAL PARK.

THIS INCLUDES INTERSTATE 94 IN MINNESOTA BETWEEN MILE MARKERS 245 AND
256.
 
PRECAUTIONARY/PREPAREDNESS ACTIONS...

FOR YOUR PROTECTION MOVE TO AN INTERIOR ROOM ON THE LOWEST FLOOR OF A
BUILDING.

&&

LAT...LON 4530 9325 4523 9306 4510 9295 4501 9282
      4486 9276 4486 9292 4488 9302 4504 9307
      4517 9320
TIME...MOT...LOC 2352Z 353DEG 23KT 4516 9309 4497 9290 

HAIL...1.00IN
WIND...<50MPH
 
$$

BORGHOFF

The office that day

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

IssuedProductOfficeCountiesLasted
Jun 29, 3:13 AM CDTDense Fog AdvisoryMPXBarron, Chippewa, Dunn, Eau Claire, Pepin, Pierce and 3 more6 hr
Jun 29, 2:52 PM CDTSpecial Weather StatementMPXChippewa38 min
Jun 29, 3:24 PM CDTSpecial Weather StatementMPXBarron51 min
Jun 29, 3:33 PM CDTSpecial Weather StatementMPXEau Claire27 min
Jun 29, 3:35 PM CDTSpecial Weather StatementMPXBarron25 min
Jun 29, 4:39 PM CDTSevere Thunderstorm WarningMPXDunn, Eau Claire25 min
Jun 29, 5:00 PM CDTSevere Thunderstorm WarningMPXPolk60 min
Jun 29, 1:19 PM CDTSpecial Weather StatementMPXMille Lacs26 min
Jun 29, 3:12 PM CDTSpecial Weather StatementMPXHennepin33 min
Jun 29, 3:19 PM CDTSevere Thunderstorm WarningMPXHennepin, Wright56 min
Jun 29, 3:56 PM CDTSevere Thunderstorm WarningMPXHennepin64 min
Jun 29, 4:28 PM CDTSevere Thunderstorm WarningMPXDakota, Scott47 min
Jun 29, 5:32 PM CDTSevere Thunderstorm WarningMPXAnoka, Chisago, Washington58 min
Jun 29, 6:02 PM CDTSevere Thunderstorm WarningMPXAnoka, Isanti43 min
Jun 29, 6:48 PM CDTSevere Thunderstorm WarningMPXAnoka, Ramsey42 min

Nearby

Severe Thunderstorm Warnings in Minnesota, 2015Severe Thunderstorm Warnings in Wisconsin, 2015Every severe thunderstorm warning in 2015

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.