Alert archive / Minnesota / Tornado Warnings in 2010

Tornado Warning 74, NWS Twin Cities, MN

July 17, 20104 counties in Minnesota

NWS Twin Cities, MN issued this tornado warning at Jul 17, 2010, 8:10 PM CDT for 4 counties in Minnesota. It was in force for 35 min. 15 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
Jul 17, 2010, 8:10 PM CDT (01:10 UTC)
Expired
Jul 17, 2010, 8:45 PM CDT
In force
35 min
Issued by
NWS Twin Cities, MN
Area
Storm-based polygon

Counties Anoka County, MN, Hennepin County, MN, Ramsey County, MN, Washington County, MN

The radar

The Minneapolis radar (KMPX), 48 km from the middle of the area, began a volume at 01:10 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
Jul 17, 8:15 PM CDTTSTM WND DMGMaple Grove, MNABOUT A HALF DOZEN TREES WITH SIX INCH PLUS BRANCHES DOWN ALONG COUNTY RD 50. WIND ESTIMATED 60 MPH.
Jul 17, 8:20 PM CDTFUNNEL CLOUDChamplin, MNROTATING WLL CALL AT US 169 AND ELM CREEK ST.
Jul 17, 8:20 PM CDTFUNNEL CLOUDDayton, MNOBSCURRED BY TREE LINE
Jul 17, 8:20 PM CDTTSTM WND GST 50Maple Grove, MN
Jul 17, 8:20 PM CDTTORNADODayton, MNIN TOWN REPORTS TO BE MOVING EAST.
Jul 17, 8:25 PM CDTTSTM WND DMG5 Wnw Roseville, MNMULTIPLE LARGE TREES DOWN... TIME ESTIMATED
Jul 17, 8:27 PM CDTTORNADOAnoka, MNUNCONFIRMED
Jul 17, 8:33 PM CDTTSTM WND DMGBlaine, MN18 TO 24 INCH TREES DOWN AT BLAINE CITY HALL RADISSON ROAD
Jul 17, 8:42 PM CDTTSTM WND DMGAnoka, MN8 INCH TRESS SNAPPED ON VIKING BLVD
Jul 17, 8:45 PM CDTTSTM WND DMG1 N White Bear Lake, MNSEVERAL 6 TO 12 INCH DIAMETER TREES DOWN ALONG HWY 61 AND CITY WITHOUT POWER. TIME ESTIMATED
Jul 17, 8:45 PM CDTTSTM WND DMGAndover, MNMULTIPLE LARGE TREES DOWN
Jul 17, 8:48 PM CDTTSTM WND DMG5 N Roseville, MN8 INCH TREES DOWN
Jul 17, 8:48 PM CDTTSTM WND DMGBlaine, MN20 TO 24 INCH TREE DOWN AT 242 AND HWY 65
Jul 17, 8:52 PM CDTTSTM WND DMGBlaine, MN5 INCH TREE LIMBS DOWN
Jul 17, 8:52 PM CDTTSTM WND DMGChamplin, MN8 INCH PINE TREE LIMB DOWN

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
Jul 17, 12:28 PM CDTTornado WatchSPC11 hr

The nearest sounding before it

Minneapolis, MN (KMPX), launched 00:00Z, 1.2 hours before the alert went out and 50 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 00:00Z on 2010-07-18Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 1779 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 00:00Z on 2010-07-18The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 268 square meters per square second.19395878Sfc1 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
1779 J/kg
Mixed-layer CIN
-139 J/kg
Mixed-layer LCL
1367 m above ground
0-6 km bulk shear
51 kt
0-1 km storm-relative helicity
268 m²/s²
0-3 km storm-relative helicity
618 m²/s²
Significant tornado parameter
1.1
Supercell composite
4.3

Open this sounding in Storm Lab

The text

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

914 
WFUS53 KMPX 180110
TORMPX
MNC003-053-123-163-180145-
/O.NEW.KMPX.TO.W.0074.100718T0110Z-100718T0145Z/

BULLETIN - EAS ACTIVATION REQUESTED
TORNADO WARNING
NATIONAL WEATHER SERVICE TWIN CITIES/CHANHASSEN MN
810 PM CDT SAT JUL 17 2010

THE NATIONAL WEATHER SERVICE IN THE TWIN CITIES HAS ISSUED A

* TORNADO WARNING FOR...
  SOUTHERN ANOKA COUNTY IN EAST CENTRAL MINNESOTA...
  NORTHWESTERN WASHINGTON COUNTY IN EAST CENTRAL MINNESOTA...
  NORTHERN HENNEPIN COUNTY IN EAST CENTRAL MINNESOTA...
  NORTHERN RAMSEY COUNTY IN EAST CENTRAL MINNESOTA...

* UNTIL 845 PM CDT

* AT 806 PM CDT...LAW ENFORCEMENT REPORTED A TORNADO 2 MILES WEST OF
  ROGERS. RADAR SHOWED THE TORNADIC STORM MOVING EAST AT 40 MPH.

* LOCATIONS IN THE WARNING INCLUDE...
  DAYTON...
  MAPLE GROVE...
  OSSEO...
  ANOKA...
  CHAMPLIN...
  BROOKLYN PARK...
  ANDOVER...
  COON RAPIDS...
  OAK PARK...
  SPRING LAKE PARK...
  HAM LAKE...
  BLAINE...

PRECAUTIONARY/PREPAREDNESS ACTIONS...

WHEN A TORNADO WARNING IS ISSUED BASED ON RADAR...IT MEANS THAT
STRONG ROTATION HAS BEEN DETECTED IN THE STORM. A TORNADO MAY ALREADY
BE ON THE GROUND...OR IS EXPECTED TO DEVELOP SHORTLY.

A TORNADO WATCH REMAINS IN EFFECT UNTIL 900 PM CDT SATURDAY EVENING
FOR SOUTHERN MINNESOTA AND NORTHWESTERN WISCONSIN.

&&

LAT...LON 4529 9296 4507 9298 4511 9366 4526 9350
TIME...MOT...LOC 0111Z 273DEG 36KT 4519 9352

$$

JLT
2 follow-up statements
668 
WWUS53 KMPX 180119
SVSMPX

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE TWIN CITIES/CHANHASSEN MN
819 PM CDT SAT JUL 17 2010

MNC003-053-123-163-180145-
/O.CON.KMPX.TO.W.0074.000000T0000Z-100718T0145Z/
ANOKA MN-WASHINGTON MN-HENNEPIN MN-RAMSEY MN-
819 PM CDT SAT JUL 17 2010

...A TORNADO WARNING REMAINS IN EFFECT FOR NORTHERN RAMSEY...NORTHERN
HENNEPIN...NORTHWESTERN WASHINGTON AND SOUTHERN ANOKA COUNTIES UNTIL
845 PM CDT...

AT 815 PM CDT...NATIONAL WEATHER SERVICE RADAR WAS TRACKING A 
CONFIRMED TORNADO.  THIS TORNADO WAS LOCATED IN DAYTON...OR 18 MILES 
NORTHWEST OF MINNEAPOLIS...MOVING EAST AT 40 MPH.



LOCATIONS IMPACTED INCLUDE...
  ANOKA...CHAMPLIN...BROOKLYN PARK...ANDOVER...COON RAPIDS...OAK
  PARK...SPRING LAKE PARK...HAM LAKE...BLAINE...MOUNDS VIEW...
  LEXINGTON...CIRCLE PINES...SHOREVIEW...NORTH OAKS...LINO LAKES...
  CENTERVILLE AND FOREST LAKE.

LAT...LON 4529 9296 4507 9298 4511 9366 4526 9350
TIME...MOT...LOC 0119Z 273DEG 36KT 4519 9341

$$

JLT
781 
WWUS53 KMPX 180127
SVSMPX

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE TWIN CITIES/CHANHASSEN MN
827 PM CDT SAT JUL 17 2010

MNC003-053-123-163-180145-
/O.CON.KMPX.TO.W.0074.000000T0000Z-100718T0145Z/
ANOKA MN-WASHINGTON MN-HENNEPIN MN-RAMSEY MN-
827 PM CDT SAT JUL 17 2010

...A TORNADO WARNING REMAINS IN EFFECT FOR NORTHERN RAMSEY...NORTHERN
HENNEPIN...NORTHWESTERN WASHINGTON AND SOUTHERN ANOKA COUNTIES UNTIL
845 PM CDT...

AT 824 PM CDT...THE PUBLIC REPORTED A TORNADO.  THIS TORNADO WAS
LOCATED NEAR ANOKA...OR 15 MILES NORTH OF MINNEAPOLIS...MOVING
EAST AT 55 MPH.

LOCATIONS IMPACTED INCLUDE...
  BLAINE...MOUNDS VIEW...LEXINGTON...CIRCLE PINES...SHOREVIEW...LINO
  LAKES...NORTH OAKS...CENTERVILLE AND FOREST LAKE.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

HEAVY RAINFALL MAY HIDE THIS TORNADO. DO NOT WAIT TO SEE OR HEAR THE
TORNADO. TAKE COVER NOW.

&&

LAT...LON 4529 9296 4507 9298 4511 9366 4526 9350
TIME...MOT...LOC 0127Z 279DEG 48KT 4517 9324

$$

JLT

The office that day

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

IssuedProductOfficeCountiesLasted
Jul 17, 7:13 PM CDTTornado WarningMPXMille Lacs, Morrison62 min
Jul 17, 7:15 PM CDTSevere Thunderstorm WarningMPXMcLeod, Meeker, Renville, Stearns60 min
Jul 17, 7:27 PM CDTTornado WarningMPXBenton, Mille Lacs, Sherburne, Stearns48 min
Jul 17, 7:33 PM CDTSevere Thunderstorm WarningMPXHennepin, Sherburne, Stearns, Wright57 min
Jul 17, 7:34 PM CDTSevere Thunderstorm WarningMPXMcLeod, Renville, Sibley41 min
Jul 17, 7:38 PM CDTSevere Thunderstorm WarningMPXChisago, Isanti, Kanabec52 min
Jul 17, 8:00 PM CDTSevere Thunderstorm WarningMPXAnoka, Chisago, Hennepin, Ramsey, Sherburne, Washington and 1 more60 min
Jul 17, 8:21 PM CDTSevere Thunderstorm WarningMPXCarver, Dakota, Hennepin, Ramsey, Scott, Washington54 min
Jul 17, 8:34 PM CDTTornado WarningMPXAnoka, Chisago, Ramsey, Washington26 min
Jul 17, 8:51 PM CDTTornado WarningMPXChisago, Washington24 min
Jul 17, 9:08 PM CDTAreal Flood AdvisoryMPXAnoka, Dakota, Hennepin, Ramsey, Washington6 hr
Jul 17, 9:26 PM CDTSevere Thunderstorm WarningMPXKandiyohi, Meeker, Pope, Stearns51 min
Jul 17, 9:40 PM CDTSpecial Weather StatementMPXDakota50 min
Jul 17, 9:53 PM CDTSevere Thunderstorm WarningMPXDakota, Ramsey, Washington23 min
Jul 17, 10:11 PM CDTSevere Thunderstorm WarningMPXBlue Earth, Faribault, Martin, Watonwan64 min
Jul 17, 10:43 PM CDTSpecial Weather StatementMPXFreeborn62 min

Nearby

Tornado Warnings in Minnesota, 2010Every tornado warning in 2010Tornadoes in 2010

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.