Alert archive / Minnesota / Severe Thunderstorm Warnings in 2015

Severe Thunderstorm Warning 53, NWS Twin Cities, MN

June 29, 2015Anoka County, Chisago County, Washington County, Minnesota

NWS Twin Cities, MN issued this severe thunderstorm warning at Jun 29, 2015, 5:32 PM CDT for Anoka County, Chisago County, Washington County, Minnesota. It was in force for 58 min. 11 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, 5:32 PM CDT (22:32 UTC)
Expired: Jun 29, 2015, 6:30 PM CDT
In force: 58 min
Issued by: NWS Twin Cities, MN
Area: Storm-based polygon
Tornado: Possible
Hail: 1.25 in
Wind: 50.0 mph

Counties Anoka County, MN, Chisago County, MN, Washington County, MN

The radar

The Minneapolis radar (KMPX), 70 km from the middle of the area, began a volume at 22:31 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
Jun 29, 6:00 PM CDT	HAIL 0.75	2 S Chisago City, MN
Jun 29, 6:00 PM CDT	HAIL 1	Wyoming, MN
Jun 29, 6:04 PM CDT	HAIL 1	Forest Lake, MN
Jun 29, 6:13 PM CDT	HAIL 1	Wyoming, MN
Jun 29, 6:20 PM CDT	HAIL 1	5 Sw Scandia, MN	OCCURRED NEAR BIG MARINE LAKE.
Jun 29, 6:26 PM CDT	HAIL 1	3 Se Hugo, MN
Jun 29, 6:26 PM CDT	HAIL 1.25	4 E Hugo, MN
Jun 29, 6:30 PM CDT	HAIL 1	3 Se Hugo, MN
Jun 29, 6:30 PM CDT	HAIL 1	5 E Ham Lake, MN	OCCURRED IN COLUMBUS.
Jun 29, 6:32 PM CDT	HAIL 0.75	Forest Lake, MN
Jun 29, 6:40 PM CDT	HAIL 0.5	Hugo, MN	OCCURRED NEAR I-35 AND COUNTY ROAD 14.

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
Jun 29, 1:57 PM CDT	Severe Thunderstorm Watch	SPC	8 hr

The nearest sounding before it

Minneapolis, MN (KMPX), launched 12:00Z, 10.5 hours before the alert went out and 72 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: 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.

675 
WUUS53 KMPX 292232
SVRMPX
MNC003-025-163-292330-
/O.NEW.KMPX.SV.W.0053.150629T2232Z-150629T2330Z/

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

THE NATIONAL WEATHER SERVICE IN THE TWIN CITIES HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  SOUTHERN CHISAGO COUNTY IN EAST CENTRAL MINNESOTA...   
  NORTHERN WASHINGTON COUNTY IN EAST CENTRAL MINNESOTA... 
  EASTERN ANOKA COUNTY IN EAST CENTRAL MINNESOTA...

* UNTIL 630 PM CDT

* AT 532 PM CDT...A SEVERE THUNDERSTORM WAS LOCATED OVER NORTH
  BRANCH...OR 13 MILES EAST OF CAMBRIDGE...MOVING SOUTH AT 25 MPH.

  HAZARD...HALF DOLLAR SIZE HAIL. 

  SOURCE...TRAINED WEATHER SPOTTERS. 

  IMPACT...DAMAGE TO VEHICLES IS EXPECTED. 

* THIS SEVERE THUNDERSTORM WILL BE NEAR...
  CHISAGO CITY AND STACY AROUND 545 PM CDT.
  LINDSTROM AROUND 550 PM CDT.
  FOREST LAKE AROUND 600 PM CDT.
  LINO LAKES AND HUGO AROUND 615 PM CDT.

OTHER LOCATIONS IMPACTED BY THIS SEVERE THUNDERSTORM INCLUDE
WYOMING...OTISVILLE...WILLIAM OBRIEN STATE PARK...MARINE ON ST
CROIX...CENTERVILLE...CIRCLE PINES AND GRANT.

THIS INCLUDES INTERSTATE 35 BETWEEN MILE MARKERS 128 AND 141.
 
PRECAUTIONARY/PREPAREDNESS ACTIONS...

REMAIN ALERT FOR A POSSIBLE TORNADO! TORNADOES CAN DEVELOP QUICKLY
FROM SEVERE THUNDERSTORMS. IF YOU SPOT A TORNADO GO AT ONCE INTO THE
BASEMENT OR SMALL CENTRAL ROOM IN A STURDY STRUCTURE.

&&

LAT...LON 4521 9275 4511 9275 4513 9314 4541 9313
      4542 9276
TIME...MOT...LOC 2232Z 000DEG 20KT 4546 9298 

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

BORGHOFF

2 follow-up statements

387 
WWUS53 KMPX 292254
SVSMPX

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

MNC003-025-163-292330-
/O.CON.KMPX.SV.W.0053.000000T0000Z-150629T2330Z/
CHISAGO MN-WASHINGTON MN-ANOKA MN-
554 PM CDT MON JUN 29 2015

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 630 PM CDT
FOR SOUTH CENTRAL CHISAGO...NORTHERN WASHINGTON AND EAST CENTRAL
ANOKA COUNTIES...

AT 553 PM CDT...A SEVERE THUNDERSTORM WAS LOCATED OVER CHISAGO
CITY...OR 19 MILES SOUTHEAST OF CAMBRIDGE...MOVING SOUTH AT 25 MPH.

HAZARD...TWO INCH HAIL. 

SOURCE...RADAR INDICATED. 

IMPACT...PEOPLE AND ANIMALS OUTDOORS WILL BE INJURED. EXPECT DAMAGE 
         TO ROOFS...SIDING...WINDOWS AND VEHICLES. 

THIS SEVERE STORM WILL BE NEAR...
  FOREST LAKE AROUND 600 PM CDT.
  SCANDIA AROUND 610 PM CDT.
  HUGO AROUND 615 PM CDT.

OTHER LOCATIONS IMPACTED BY THIS SEVERE THUNDERSTORM INCLUDE WILLIAM
OBRIEN STATE PARK...WYOMING...MARINE ON ST CROIX...CENTERVILLE AND
GRANT.

THIS INCLUDES INTERSTATE 35 BETWEEN MILE MARKERS 128 AND 140.
 
PRECAUTIONARY/PREPAREDNESS ACTIONS...

REMAIN ALERT FOR A POSSIBLE TORNADO! TORNADOES CAN DEVELOP QUICKLY
FROM SEVERE THUNDERSTORMS. IF YOU SPOT A TORNADO GO AT ONCE INTO THE
BASEMENT OR SMALL CENTRAL ROOM IN A STURDY STRUCTURE.

THIS STORM IS PRODUCING LARGE HAIL. SEEK SHELTER NOW INSIDE A STURDY
STRUCTURE AND STAY AWAY FROM WINDOWS.

&&

LAT...LON 4511 9275 4513 9311 4541 9304 4541 9282
TIME...MOT...LOC 2253Z 349DEG 22KT 4535 9292 

TORNADO...POSSIBLE
HAIL...2.00IN
WIND...<50MPH
 
$$

BORGHOFF

553 
WWUS53 KMPX 292318
SVSMPX

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

MNC003-025-163-292330-
/O.CON.KMPX.SV.W.0053.000000T0000Z-150629T2330Z/
CHISAGO MN-WASHINGTON MN-ANOKA MN-
618 PM CDT MON JUN 29 2015

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 630 PM CDT
FOR SOUTH CENTRAL CHISAGO...NORTHERN WASHINGTON AND EAST CENTRAL
ANOKA COUNTIES...

AT 618 PM CDT...SEVERE THUNDERSTORMS WERE LOCATED ALONG A LINE
EXTENDING FROM NEAR MARINE ON ST CROIX TO NEAR FOREST LAKE TO NEAR
WYOMING...MOVING SOUTH AT 20 MPH.

HAZARD...GOLF BALL SIZE HAIL. 

SOURCE...RADAR INDICATED. 

IMPACT...PEOPLE AND ANIMALS OUTDOORS WILL BE INJURED. EXPECT DAMAGE 
         TO ROOFS...SIDING...WINDOWS AND VEHICLES. 

THESE SEVERE STORMS WILL BE NEAR...
  LINO LAKES AND HUGO AROUND 630 PM CDT.

OTHER LOCATIONS IMPACTED BY THESE SEVERE THUNDERSTORMS INCLUDE
WYOMING...CENTERVILLE...WILLIAM OBRIEN STATE PARK...MARINE ON ST
CROIX AND GRANT.

THIS INCLUDES INTERSTATE 35 BETWEEN MILE MARKERS 128 AND 137.
 
PRECAUTIONARY/PREPAREDNESS ACTIONS...

THESE STORMS ARE PRODUCING LARGE HAIL. SEEK SHELTER NOW INSIDE A
STURDY STRUCTURE AND STAY AWAY FROM WINDOWS.

&&

LAT...LON 4511 9275 4513 9311 4539 9304 4522 9278
TIME...MOT...LOC 2318Z 008DEG 17KT 4517 9285 4525 9296 4531 9303 

HAIL...1.75IN
WIND...<50MPH
 
$$

BORGHOFF

The office that day

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

Issued	Product	Office	Counties	Lasted
Jun 29, 1:19 PM CDT	Special Weather Statement	MPX	Mille Lacs	26 min
Jun 29, 3:12 PM CDT	Special Weather Statement	MPX	Hennepin	33 min
Jun 29, 3:19 PM CDT	Severe Thunderstorm Warning	MPX	Hennepin, Wright	56 min
Jun 29, 3:56 PM CDT	Severe Thunderstorm Warning	MPX	Hennepin	64 min
Jun 29, 4:28 PM CDT	Severe Thunderstorm Warning	MPX	Dakota, Scott	47 min
Jun 29, 5:00 PM CDT	Severe Thunderstorm Warning	MPX	Chisago, Isanti	60 min
Jun 29, 6:02 PM CDT	Severe Thunderstorm Warning	MPX	Anoka, Isanti	43 min
Jun 29, 6:28 PM CDT	Severe Thunderstorm Warning	MPX	Anoka, Ramsey, Washington	47 min
Jun 29, 6:48 PM CDT	Severe Thunderstorm Warning	MPX	Anoka, Ramsey	42 min

Nearby

Severe Thunderstorm Warnings in Minnesota, 2015 Every 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.