Alert archive / Minnesota / Tornado Warnings in 2010

Tornado Warning 71, NWS Twin Cities, MN

July 17, 2010Benton County, Mille Lacs County, Morrison County, Minnesota

NWS Twin Cities, MN issued this tornado warning at Jul 17, 2010, 6:54 PM CDT for Benton County, Mille Lacs County, Morrison County, Minnesota. It was in force for 51 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 17, 2010, 6:54 PM CDT (23:54 UTC)
Expired
Jul 17, 2010, 7:45 PM CDT
In force
51 min
Issued by
NWS Twin Cities, MN
Area
Storm-based polygon

Counties Benton County, MN, Mille Lacs County, MN, Morrison County, MN

The radar

The Minneapolis radar (KMPX), 104 km from the middle of the area, began a volume at 23:56 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, 7:25 PM CDTTORNADO3 E Foreston, MNROPE TORNADO TOUCHED GROUND BRIEFLY THEN WENT BACK UP

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 12:00Z, 11.9 hours before the alert went out and 103 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 2010-07-17Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 368 joules per kilogram.LCLLFCEL10008507005003002001001 km2 km3 km6 km9 km12 km15 km-30°-20°-10°0°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Minneapolis, MN at 12:00Z on 2010-07-17The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 119 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
368 J/kg
Mixed-layer CIN
-101 J/kg
Mixed-layer LCL
1285 m above ground
0-6 km bulk shear
31 kt
0-1 km storm-relative helicity
119 m²/s²
0-3 km storm-relative helicity
226 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.9

Open this sounding in Storm Lab

The text

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

357 
WFUS53 KMPX 172354
TORMPX
MNC009-095-097-180045-
/O.NEW.KMPX.TO.W.0071.100717T2354Z-100718T0045Z/

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

THE NATIONAL WEATHER SERVICE IN THE TWIN CITIES HAS ISSUED A

* TORNADO WARNING FOR...
  SOUTHEASTERN MORRISON COUNTY IN CENTRAL MINNESOTA...
  SOUTHERN MILLE LACS COUNTY IN EAST CENTRAL MINNESOTA...
  BENTON COUNTY IN CENTRAL MINNESOTA...

* UNTIL 745 PM CDT

* AT 651 PM CDT...RADAR WAS TRACKING A SEVERE STORM WITH STRONG
  ROTATION. THE MOST DANGEROUS PART OF THE STORM WAS 4 MILES NORTH OF
  LITTLE ROCK...OR ABOUT OVER BUCKMAN...AND MOVING SOUTHEAST AT 40
  MPH.

* LOCATIONS IN THE WARNING INCLUDE...
  MILACA...
  PRINCETON...
  MAYHEW...
  GILMAN...
  PARENT...
  RUM RIVER...
  FOLEY...
  RONNEBY...
  FORESTON...
  GLENDORADO...
  PEASE...
  BOCK...

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 800 PM CDT SATURDAY EVENING
FOR SOUTHERN MINNESOTA AND NORTHWESTERN WISCONSIN.

&&

LAT...LON 4582 9391 4583 9351 4556 9352 4557 9392
      4581 9433 4588 9415
TIME...MOT...LOC 2354Z 297DEG 35KT 4586 9404

$$

JLT
4 follow-up statements
927 
WWUS53 KMPX 172359
SVSMPX

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

MNC009-095-097-180045-
/O.CON.KMPX.TO.W.0071.000000T0000Z-100718T0045Z/
MORRISON MN-MILLE LACS MN-BENTON MN-
659 PM CDT SAT JUL 17 2010

...A TORNADO WARNING REMAINS IN EFFECT FOR BENTON...SOUTHERN MILLE
LACS AND SOUTH CENTRAL MORRISON COUNTIES UNTIL 745 PM CDT...

AT 656 PM CDT...NATIONAL WEATHER SERVICE RADAR INDICATED A SEVERE
SQUALL LINE CAPABLE OF PRODUCING DAMAGING STRAIGHT LINE WINDS AND
BRIEF RAIN-WRAPPED TORNADOES.  THIS DANGEROUS STORM WAS LOCATED NEAR
LITTLE ROCK...OR 19 MILES NORTH OF ST CLOUD...MOVING SOUTHEAST AT 40
MPH.

LOCATIONS IMPACTED INCLUDE...
  MILACA...PRINCETON...MAYHEW...GILMAN...RUM RIVER...PARENT...
  FOLEY...RONNEBY...FORESTON...PEASE...GLENDORADO AND BOCK.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

MOTORISTS SHOULD NOT TAKE SHELTER UNDER HIGHWAY OVERPASSES. AS A LAST
RESORT... EITHER PARK YOUR VEHICLE AND STAY PUT...OR ABANDON YOUR
VEHICLE AND LIE DOWN IN A LOW LYING AREA.

&&

LAT...LON 4582 9391 4583 9351 4556 9352 4557 9392
      4581 9433 4588 9415
TIME...MOT...LOC 2359Z 314DEG 37KT 4579 9401

$$

JLT
551 
WWUS53 KMPX 180004
SVSMPX

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

MNC009-095-097-180045-
/O.CON.KMPX.TO.W.0071.000000T0000Z-100718T0045Z/
MORRISON MN-MILLE LACS MN-BENTON MN-
704 PM CDT SAT JUL 17 2010

...A TORNADO WARNING REMAINS IN EFFECT FOR BENTON...SOUTHERN MILLE
LACS AND SOUTH CENTRAL MORRISON COUNTIES UNTIL 745 PM CDT...

AT 700 PM CDT...NATIONAL WEATHER SERVICE RADAR INDICATED A SEVERE
SQUALL LINE CAPABLE OF PRODUCING DAMAGING STRAIGHT LINE WINDS AND
BRIEF RAIN-WRAPPED TORNADOES.  THIS DANGEROUS STORM WAS LOCATED NEAR
GILMAN...OR 17 MILES WEST OF MILACA...MOVING EAST AT 50 MPH.

IN ADDITION...AT 656 PM 81 MPH WINDS WERE REPORTED 2 MILES SOUTH OF 
BUCKMAN.

LOCATIONS IMPACTED INCLUDE...
  MILACA...PRINCETON...FOLEY...RUM RIVER...RONNEBY...FORESTON...
  GLENDORADO...PEASE AND BOCK.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

MOTORISTS SHOULD NOT TAKE SHELTER UNDER HIGHWAY OVERPASSES. AS A LAST
RESORT... EITHER PARK YOUR VEHICLE AND STAY PUT...OR ABANDON YOUR
VEHICLE AND LIE DOWN IN A LOW LYING AREA.

&&

LAT...LON 4582 9391 4583 9351 4556 9352 4557 9392
      4581 9433 4588 9415
TIME...MOT...LOC 0004Z 291DEG 42KT 4576 9393

$$

JLT
507 
WWUS53 KMPX 180016
SVSMPX

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

MNC009-095-097-180045-
/O.CON.KMPX.TO.W.0071.000000T0000Z-100718T0045Z/
MORRISON MN-MILLE LACS MN-BENTON MN-
716 PM CDT SAT JUL 17 2010

...A TORNADO WARNING REMAINS IN EFFECT FOR BENTON...SOUTHERN MILLE
LACS AND SOUTH CENTRAL MORRISON COUNTIES UNTIL 745 PM CDT...

AT 714 PM CDT...NATIONAL WEATHER SERVICE RADAR INDICATED A SEVERE
SQUALL LINE CAPABLE OF PRODUCING DAMAGING STRAIGHT LINE WINDS AND
BRIEF RAIN-WRAPPED TORNADOES.  THIS DANGEROUS STORM WAS LOCATED NEAR
RONNEBY...OR 9 MILES WEST OF MILACA...MOVING EAST AT 35 MPH.

LOCATIONS IMPACTED INCLUDE...
  MILACA...PRINCETON...FORESTON...GLENDORADO...PEASE AND BOCK.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

MOTORISTS SHOULD NOT TAKE SHELTER UNDER HIGHWAY OVERPASSES. AS A LAST
RESORT... EITHER PARK YOUR VEHICLE AND STAY PUT...OR ABANDON YOUR
VEHICLE AND LIE DOWN IN A LOW LYING AREA.

&&

LAT...LON 4582 9391 4583 9351 4556 9352 4557 9392
      4581 9433 4588 9415
TIME...MOT...LOC 0016Z 291DEG 32KT 4573 9382

$$

JLT
887 
WWUS53 KMPX 180029
SVSMPX

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

MNC009-095-097-180045-
/O.CON.KMPX.TO.W.0071.000000T0000Z-100718T0045Z/
MORRISON MN-MILLE LACS MN-BENTON MN-
729 PM CDT SAT JUL 17 2010

...A TORNADO WARNING REMAINS IN EFFECT FOR BENTON...SOUTHERN MILLE
LACS AND SOUTH CENTRAL MORRISON COUNTIES UNTIL 745 PM CDT...

AT 723 PM CDT...TRAINED WEATHER SPOTTERS REPORTED A TORNADO.  THIS
TORNADO WAS LOCATED NEAR FORESTON...OR 5 MILES SOUTHWEST OF MILACA...
MOVING EAST AT 35 MPH.

LOCATIONS IMPACTED INCLUDE...
  PRINCETON...PEASE AND BOCK.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

MOTORISTS SHOULD NOT TAKE SHELTER UNDER HIGHWAY OVERPASSES. AS A LAST
RESORT... EITHER PARK YOUR VEHICLE AND STAY PUT...OR ABANDON YOUR
VEHICLE AND LIE DOWN IN A LOW LYING AREA.

&&

LAT...LON 4582 9391 4583 9351 4556 9352 4557 9392
      4581 9433 4588 9415
TIME...MOT...LOC 0029Z 291DEG 32KT 4571 9368

$$

JLT

The office that day

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

IssuedProductOfficeCountiesLasted
Jul 17, 12:15 PM CDTSpecial Weather StatementMPXKandiyohi, Swift60 min
Jul 17, 1:08 PM CDTSpecial Weather StatementMPXSwift52 min
Jul 17, 1:16 PM CDTSpecial Weather StatementMPXTodd44 min
Jul 17, 1:39 PM CDTTornado WarningMPXStearns, Todd51 min
Jul 17, 1:49 PM CDTSevere Thunderstorm WarningMPXDouglas, Todd56 min
Jul 17, 1:58 PM CDTTornado WarningMPXDouglas, Todd47 min
Jul 17, 2:20 PM CDTSevere Thunderstorm WarningMPXStearns, Todd40 min
Jul 17, 2:48 PM CDTSpecial Weather StatementMPXBenton42 min
Jul 17, 2:56 PM CDTTornado WarningMPXStearns34 min
Jul 17, 3:28 PM CDTSevere Thunderstorm WarningMPXMeeker, Stearns, Wright62 min
Jul 17, 3:58 PM CDTSevere Thunderstorm WarningMPXMeeker, Stearns, Wright62 min
Jul 17, 4:19 PM CDTTornado WarningMPXCarver, Hennepin, Meeker, Wright26 min
Jul 17, 4:45 PM CDTSevere Thunderstorm WarningMPXCarver, Hennepin, McLeod, Wright60 min
Jul 17, 4:58 PM CDTTornado WarningMPXCarver, Hennepin, Wright47 min
Jul 17, 5:10 PM CDTTornado WarningMPXMorrison, Todd65 min
Jul 17, 5:44 PM CDTSpecial Weather StatementMPXHennepin46 min
Jul 17, 5:49 PM CDTTornado WarningMPXMorrison41 min
Jul 17, 6:12 PM CDTSevere Thunderstorm WarningMPXChippewa, Lac qui Parle, Swift, Yellow Medicine63 min
Jul 17, 6:25 PM CDTTornado WarningMPXMille Lacs, Morrison50 min
Jul 17, 6:28 PM CDTSevere Thunderstorm WarningMPXChippewa, Kandiyohi, Renville, Swift, Yellow Medicine62 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.