Alert archive / Minnesota / Severe Thunderstorm Warnings in 2011

Severe Thunderstorm Warning 163, NWS Twin Cities, MN

July 19, 2011Anoka County, Hennepin County, Ramsey County, Minnesota

NWS Twin Cities, MN issued this severe thunderstorm warning at Jul 19, 2011, 10:40 AM CDT for Anoka County, Hennepin County, Ramsey County, Minnesota. It was in force for 80 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 19, 2011, 10:40 AM CDT (15:40 UTC)
Expired
Jul 19, 2011, 12:00 PM CDT
In force
80 min
Issued by
NWS Twin Cities, MN
Area
Storm-based polygon
Hail
1.0 in
Wind
70.0 mph

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

The radar

The Minneapolis radar (KMPX), 41 km from the middle of the area, began a volume at 15:40 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 19, 10:57 AM CDTTSTM WND GST 56Ramsey, MNMEASURED AT PACT CHARTER SCHOOL
Jul 19, 11:03 AM CDTTSTM WND GST 592 Nw Anoka, MNMEASURED AT APRSNET SITE.
Jul 19, 11:05 AM CDTTSTM WND DMGAnoka, MNTREES 12 TO 18 INCHES IN DIAMETER TOPPLED. DAMAGE OCCURRED ON WEST SIDE OF CITY.
Jul 19, 11:15 AM CDTHAIL 0.88Brooklyn Park, MNTIME ESTIMATED.
Jul 19, 11:33 AM CDTHAIL 0.88Brooklyn Center, MN
Jul 19, 11:33 AM CDTHAIL 0.88New Brighton, MNOCCURRED NEAR INTERSECTION OF INTERSTATES 694 AND 35W.
Jul 19, 11:33 AM CDTHAIL 12 Wnw Roseville, MN
Jul 19, 11:34 AM CDTHAIL 1New Brighton, MN
Jul 19, 11:35 AM CDTHAIL 1New Brighton, MNOCCURRED NEAR COUNTY ROAD E2 AND 35W.
Jul 19, 11:44 AM CDTHAIL 0.88St Paul, MNSOUTH SIDE OF LAKE COMO
Jul 19, 11:47 AM CDTHAIL 1Roseville, MNOCCURRED NEAR SNELLING AND HIGHWAY 46 AT THE ROSEDALE MALL.
Jul 19, 11:55 AM CDTHAIL 1.25Roseville, MN
Jul 19, 12:06 PM CDTHAIL 1.25St Paul, MN
Jul 19, 12:07 PM CDTHAIL 1St Paul, MN
Jul 19, 12:10 PM CDTHAIL 0.88St Paul, 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
Jul 19, 9:07 AM CDTSevere Thunderstorm WatchSPC6 hr

The nearest sounding before it

Minneapolis, MN (KMPX), launched 12:00Z, 3.7 hours before the alert went out and 43 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 2011-07-19Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 5144 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 2011-07-19The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 53 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
5144 J/kg
Mixed-layer CIN
-30 J/kg
Mixed-layer LCL
830 m above ground
0-6 km bulk shear
29 kt
0-1 km storm-relative helicity
53 m²/s²
0-3 km storm-relative helicity
109 m²/s²
Significant tornado parameter
0.9
Supercell composite
5.2

Open this sounding in Storm Lab

The text

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

616 
WUUS53 KMPX 191540
SVRMPX
MNC003-053-123-191700-
/O.NEW.KMPX.SV.W.0163.110719T1540Z-110719T1700Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE TWIN CITIES/CHANHASSEN MN
1040 AM CDT TUE JUL 19 2011

THE NATIONAL WEATHER SERVICE IN THE TWIN CITIES HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  ANOKA COUNTY IN EAST CENTRAL MINNESOTA...
  NORTHEASTERN HENNEPIN COUNTY IN EAST CENTRAL MINNESOTA...
  RAMSEY COUNTY IN EAST CENTRAL MINNESOTA...

* UNTIL NOON CDT

* AT 1036 AM CDT...RADAR INDICATED A SEVERE THUNDERSTORM...CAPABLE OF
  PRODUCING QUARTER SIZE HAIL AND DESTRUCTIVE WINDS IN EXCESS OF 70
  MPH. THIS STORM WAS LOCATED NEAR RAMSEY...OR ABOUT 19 MILES
  SOUTHWEST OF CAMBRIDGE...AND MOVING SOUTHEAST AT 25 MPH.

LOCATIONS IN THE WARNING INCLUDE...
  MINNEAPOLIS...
  ST PAUL...
  RAMSEY...
  CEDAR...
  EAST BETHEL...
  DAYTON...
  ANDOVER...
  ANOKA...
  CHAMPLIN...
  HAM LAKE...
  COON RAPIDS...
  OSSEO...
  OAK PARK...
  BROOKLYN PARK...

PRECAUTIONARY/PREPAREDNESS ACTIONS...

THIS IS A DANGEROUS SITUATION. IF YOU ARE IN THE PATH OF THIS
STORM...PREPARE IMMEDIATELY FOR DESTRUCTIVE WINDS...WHICH CAN UPROOT
TREES...DOWN POWER LINES...AND CAUSE DAMAGE TO ROOFS AND WINDOWS.
EVACUATE MOBILE HOMES AS THEY MAY BE OVERTURNED. LARGE HAIL IS ALSO
EXPECTED...WHICH CAN CAUSE DAMAGE TO VEHICLES AND WINDOWS. SEEK
SHELTER NOW INSIDE A STURDY STRUCTURE AND STAY AWAY FROM WINDOWS.

SEVERE THUNDERSTORMS CAN PRODUCE TORNADOES WITH LITTLE OR NO ADVANCE
WARNING. PREPARE TO MOVE TO A PLACE OF SAFETY IN A STURDY STRUCTURE
SUCH AS A BASEMENT OR SMALL INTERIOR ROOM IF A TORNADO IS SPOTTED.

WIND DAMAGE WITH THIS STORM MAY OCCUR AHEAD OF ANY RAIN OR 
LIGHTNING. DO NOT WAIT FOR THE SOUND OF THUNDER BEFORE TAKING COVER. 
SEEK SHELTER IMMEDIATELY INSIDE A STURDY STRUCTURE AND STAY AWAY FROM
WINDOWS.

&&

LAT...LON 4523 9303 4513 9302 4512 9298 4490 9299
      4490 9303 4492 9305 4492 9313 4489 9315
      4489 9319 4495 9330 4524 9352 4532 9351
      4538 9312
TIME...MOT...LOC 1541Z 324DEG 24KT 4529 9339
WIND...HAIL 70MPH 1.00IN

$$
3 follow-up statements
179 
WWUS53 KMPX 191603
SVSMPX

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE TWIN CITIES/CHANHASSEN MN
1103 AM CDT TUE JUL 19 2011

MNC003-053-123-191700-
/O.CON.KMPX.SV.W.0163.000000T0000Z-110719T1700Z/
ANOKA MN-HENNEPIN MN-RAMSEY MN-
1103 AM CDT TUE JUL 19 2011

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT FOR RAMSEY...
NORTHEASTERN HENNEPIN AND ANOKA COUNTIES UNTIL NOON CDT...

AT 1059 AM CDT...NATIONAL WEATHER SERVICE RADAR INDICATED A SEVERE
THUNDERSTORM CAPABLE OF PRODUCING QUARTER SIZE HAIL...AND DESTRUCTIVE
WINDS IN EXCESS OF 70 MPH.  THIS STORM WAS LOCATED NEAR COON
RAPIDS...OR 14 MILES NORTHEAST OF PLYMOUTH...MOVING SOUTHEAST AT 30
MPH.

LOCATIONS IMPACTED INCLUDE...
  MINNEAPOLIS...ST PAUL...BROOKLYN PARK...BLAINE...SPRING LAKE
  PARK...BROOKLYN CENTER...LEXINGTON...CRYSTAL...FRIDLEY...CIRCLE
  PINES...MOUNDS VIEW...LINO LAKES...ROBBINSDALE...CENTERVILLE AND
  HILLTOP.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

THIS IS A DANGEROUS SITUATION. IF YOU ARE IN THE PATH OF THIS
STORM...PREPARE IMMEDIATELY FOR DESTRUCTIVE WINDS...WHICH CAN UPROOT
TREES...DOWN POWER LINES...AND CAUSE DAMAGE TO ROOFS AND WINDOWS.
EVACUATE MOBILE HOMES AS THEY MAY BE OVERTURNED. LARGE HAIL IS ALSO
EXPECTED...WHICH CAN CAUSE DAMAGE TO VEHICLES AND WINDOWS. SEEK
SHELTER NOW INSIDE A STURDY STRUCTURE AND STAY AWAY FROM WINDOWS.

THIS STORM HAS EXHIBITED SOME WEAK ROTATION. TORNADOES CAN DEVELOP
QUICKLY FROM SEVERE THUNDERSTORMS. ALTHOUGH ONE IS NOT IMMEDIATELY
LIKELY...IF A TORNADO IS SPOTTED...ACT QUICKLY AND MOVE TO A PLACE OF
SAFETY INSIDE A STURDY STRUCTURE... SUCH AS A BASEMENT OR SMALL
INTERIOR ROOM.

&&

LAT...LON 4538 9312 4523 9303 4513 9302 4512 9298
      4490 9299 4490 9303 4492 9305 4492 9313
      4490 9315 4489 9319 4495 9330 4524 9352
      4533 9343
TIME...MOT...LOC 1603Z 324DEG 24KT 4517 9327
WIND...HAIL 70MPH 1.00IN

$$
926 
WWUS53 KMPX 191631
SVSMPX

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE TWIN CITIES/CHANHASSEN MN
1131 AM CDT TUE JUL 19 2011

MNC003-053-123-191700-
/O.CON.KMPX.SV.W.0163.000000T0000Z-110719T1700Z/
ANOKA MN-HENNEPIN MN-RAMSEY MN-
1131 AM CDT TUE JUL 19 2011

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT FOR RAMSEY...
NORTHEASTERN HENNEPIN AND SOUTHERN ANOKA COUNTIES UNTIL NOON CDT...

AT 1127 AM CDT...NATIONAL WEATHER SERVICE RADAR INDICATED A SEVERE 
THUNDERSTORM CAPABLE OF PRODUCING QUARTER SIZE HAIL...AND DAMAGING 
WINDS IN EXCESS OF 60 MPH.  THIS STORM WAS LOCATED NEAR 
ROSEVILLE...OR 6 MILES NORTHWEST OF ST PAUL...MOVING SOUTHEAST AT 30 
MPH.

LOCATIONS IMPACTED INCLUDE...
  ST PAUL...LITTLE CANADA...NORTH ST PAUL...MAPLEWOOD AND GEM LAKE.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

THIS STORM HAS EXHIBITED SOME WEAK ROTATION. TORNADOES CAN DEVELOP
QUICKLY FROM SEVERE THUNDERSTORMS. ALTHOUGH ONE IS NOT IMMEDIATELY
LIKELY...IF A TORNADO IS SPOTTED...ACT QUICKLY AND MOVE TO A PLACE OF
SAFETY INSIDE A STURDY STRUCTURE... SUCH AS A BASEMENT OR SMALL
INTERIOR ROOM.

&&

LAT...LON 4523 9303 4513 9302 4512 9298 4490 9299
      4490 9303 4492 9305 4492 9313 4489 9319
      4495 9330 4508 9340 4521 9340 4525 9331
TIME...MOT...LOC 1631Z 324DEG 24KT 4501 9313
WIND...HAIL 60MPH 1.00IN

$$
799 
WWUS53 KMPX 191659
SVSMPX

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE TWIN CITIES/CHANHASSEN MN
1159 AM CDT TUE JUL 19 2011

MNC003-053-123-191714-
/O.EXP.KMPX.SV.W.0163.000000T0000Z-110719T1700Z/
ANOKA MN-HENNEPIN MN-RAMSEY MN-
1159 AM CDT TUE JUL 19 2011

...THE SEVERE THUNDERSTORM WARNING FOR RAMSEY...NORTHEASTERN HENNEPIN
AND SOUTHERN ANOKA COUNTIES WILL EXPIRE AT NOON CDT...

THE STORM WHICH PROMPTED THE WARNING HAS MOVED OUT OF THE WARNED 
AREA. HOWEVER... A SEPARATE WARNING REMAINS IN EFFECT FOR SOUTHEAST 
HENNEPIN AND SOUTHERN RAMSEY COUNTIES THROUGH 1230 PM CDT.

ADDITIONAL STRONG THUNDERSTORMS ARE STILL POSSIBLE...AND A SEVERE 
THUNDERSTORM WATCH REMAINS IN EFFECT UNTIL 3 PM CDT.

LAT...LON 4523 9303 4513 9302 4512 9298 4490 9299
      4490 9303 4492 9305 4492 9313 4489 9319
      4495 9330 4508 9340 4521 9340 4525 9331
TIME...MOT...LOC 1659Z 324DEG 24KT 4489 9304

$$

The office that day

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

IssuedProductOfficeCountiesLasted
Jul 19, 6:20 AM CDTSpecial Weather StatementMPXTodd40 min
Jul 19, 6:48 AM CDTSevere Thunderstorm WarningMPXTodd57 min
Jul 19, 7:43 AM CDTSpecial Weather StatementMPXMorrison77 min
Jul 19, 7:46 AM CDTSpecial Weather StatementMPXTodd29 min
Jul 19, 8:19 AM CDTAreal Flood AdvisoryMPXMorrison3 hr
Jul 19, 8:26 AM CDTSpecial Weather StatementMPXKanabec, Mille Lacs79 min
Jul 19, 8:35 AM CDTSevere Thunderstorm WarningMPXMille Lacs, Morrison55 min
Jul 19, 8:53 AM CDTSevere Thunderstorm WarningMPXBenton, Mille Lacs, Morrison82 min
Jul 19, 9:01 AM CDTFlash Flood WarningMPXMille Lacs, Morrison5 hr
Jul 19, 9:30 AM CDTSevere Thunderstorm WarningMPXKanabec, Mille Lacs, Morrison42 min
Jul 19, 9:45 AM CDTSevere Thunderstorm WarningMPXBenton, Isanti, Kanabec, Mille Lacs, Sherburne60 min
Jul 19, 10:09 AM CDTSevere Thunderstorm WarningMPXAnoka, Sherburne36 min
Jul 19, 11:11 AM CDTAreal Flood AdvisoryMPXAnoka, Dakota, Ramsey, Washington3 hr
Jul 19, 11:25 AM CDTSevere Thunderstorm WarningMPXDakota, Hennepin, Ramsey, Washington65 min

Nearby

Severe Thunderstorm Warnings in Minnesota, 2011Every severe thunderstorm warning in 2011

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.