Alert archive / Minnesota / Severe Thunderstorm Warnings in 2011

Severe Thunderstorm Warning 164, NWS Twin Cities, MN

July 19, 20114 counties in Minnesota

NWS Twin Cities, MN issued this severe thunderstorm warning at Jul 19, 2011, 11:25 AM CDT for 4 counties in Minnesota. It was in force for 65 min. 9 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, 11:25 AM CDT (16:25 UTC)
Expired
Jul 19, 2011, 12:30 PM CDT
In force
65 min
Issued by
NWS Twin Cities, MN
Area
Storm-based polygon
Hail
1.0 in
Wind
65.0 mph

Counties Dakota County, MN, Hennepin County, MN, Ramsey County, MN, Washington County, MN

The radar

The Minneapolis radar (KMPX), 51 km from the middle of the area, began a volume at 16:27 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
Jul 19, 11:44 AM CDTHAIL 0.88St Paul, MNSOUTH SIDE OF LAKE COMO
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
Jul 19, 12:18 PM CDTHAIL 0.75Mendota Heights, MNOCCURRED NEAR PILOT ROAD AND I494.
Jul 19, 12:20 PM CDTHAIL 0.75West St Paul, MNOCCURRED NEAR 908 LIVINGSTON AVE.
Jul 19, 12:20 PM CDTHAIL 1Mendota Heights, MN
Jul 19, 12:27 PM CDTHAIL 1Mendota Heights, MN
Jul 19, 12:28 PM CDTHAIL 0.75West St Paul, MNOCCURRED NEAR 908 LIVINGSTON AVE.

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, 4.4 hours before the alert went out and 54 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.

296 
WUUS53 KMPX 191625
SVRMPX
MNC037-053-123-163-191730-
/O.NEW.KMPX.SV.W.0164.110719T1625Z-110719T1730Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE TWIN CITIES/CHANHASSEN MN
1125 AM CDT TUE JUL 19 2011

THE NATIONAL WEATHER SERVICE IN THE TWIN CITIES HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  DAKOTA COUNTY IN EAST CENTRAL MINNESOTA...
  SOUTHEASTERN HENNEPIN COUNTY IN EAST CENTRAL MINNESOTA...
  SOUTHERN RAMSEY COUNTY IN EAST CENTRAL MINNESOTA...
  SOUTHWESTERN WASHINGTON COUNTY IN EAST CENTRAL MINNESOTA...

* UNTIL 1230 PM CDT

* AT 1123 AM CDT...RADAR INDICATED A SEVERE THUNDERSTORM...CAPABLE OF
  PRODUCING QUARTER SIZE HAIL AND DAMAGING WINDS IN EXCESS OF 65 MPH.
  THIS STORM WAS LOCATED NEAR COLUMBIA HEIGHTS...OR ABOUT 5 MILES
  NORTHEAST OF MINNEAPOLIS...AND MOVING SOUTHEAST AT 35 MPH.

LOCATIONS IN THE WARNING INCLUDE...
  ST PAUL...
  LILYDALE...
  MENDOTA...
  MENDOTA HEIGHTS...
  WEST ST PAUL...
  SOUTH ST PAUL...
  EAGAN...
  NEWPORT...
  WOODBURY...
  INVER GROVE HEIGHTS...
  ST PAUL PARK...
  COTTAGE GROVE...
  ROSEMOUNT...
  COATES...

PRECAUTIONARY/PREPAREDNESS ACTIONS...

IF YOU ARE IN THE PATH OF THIS STORM...PREPARE IMMEDIATELY FOR
DAMAGING WINDS IN EXCESS OF 60 MPH AND LARGE HAIL. 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.

&&

LAT...LON 4496 9331 4498 9299 4490 9289 4478 9280
      4475 9280 4470 9273 4463 9273 4463 9280
      4455 9280 4454 9304
TIME...MOT...LOC 1625Z 327DEG 30KT 4502 9321
WIND...HAIL 65MPH 1.00IN

$$
2 follow-up statements
610 
WWUS53 KMPX 191723
SVSMPX

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE TWIN CITIES/CHANHASSEN MN
1223 PM CDT TUE JUL 19 2011

MNC053-123-191738-
/O.CAN.KMPX.SV.W.0164.000000T0000Z-110719T1730Z/
HENNEPIN MN-RAMSEY MN-
1223 PM CDT TUE JUL 19 2011

...THE SEVERE THUNDERSTORM WARNING FOR SOUTHERN RAMSEY AND
SOUTHEASTERN HENNEPIN COUNTIES IS CANCELLED...

THE STORM WHICH PROMPTED THE WARNING HAS MOVED OUT OF THE WARNED 
AREA.

LAT...LON 4468 9313 4483 9323 4489 9318 4492 9313
      4492 9305 4489 9302 4489 9298 4492 9298
      4491 9292 4478 9280 4470 9281 4468 9283
      4466 9291
TIME...MOT...LOC 1723Z 332DEG 16KT 4478 9303

$$

MNC037-163-191730-
/O.CON.KMPX.SV.W.0164.000000T0000Z-110719T1730Z/
DAKOTA MN-WASHINGTON MN-
1223 PM CDT TUE JUL 19 2011

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT FOR SOUTHWESTERN
WASHINGTON AND NORTHERN DAKOTA COUNTIES UNTIL 1230 PM CDT...

AT 1222 PM CDT...NATIONAL WEATHER SERVICE RADAR INDICATED A SEVERE
THUNDERSTORM CAPABLE OF PRODUCING DAMAGING WINDS IN EXCESS OF 60 MPH.
 THIS STORM WAS LOCATED NEAR INVER GROVE HEIGHTS...OR 12 MILES SOUTH
OF ST PAUL...MOVING SOUTHEAST AT 20 MPH. NICKEL SIZE HAIL MAY ALSO
ACCOMPANY THESE DAMAGING WINDS.

LOCATIONS IMPACTED INCLUDE...
  ROSEMOUNT...COATES...VERMILLION AND HASTINGS.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

SEVERE THUNDERSTORMS PRODUCE DAMAGING WIND IN EXCESS OF 60 MILES PER
HOUR...HAIL...AND DEADLY LIGHTNING. FOR YOUR PROTECTION MOVE TO AN
INTERIOR ROOM ON THE LOWEST FLOOR OF YOUR HOME OR BUSINESS.

&&

LAT...LON 4468 9313 4483 9323 4489 9318 4492 9313
      4492 9305 4489 9302 4489 9298 4492 9298
      4491 9292 4478 9280 4470 9281 4468 9283
      4466 9291
TIME...MOT...LOC 1723Z 332DEG 16KT 4478 9303
WIND...HAIL 60MPH 0.88IN

$$
854 
WWUS53 KMPX 191727
SVSMPX

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE TWIN CITIES/CHANHASSEN MN
1227 PM CDT TUE JUL 19 2011

MNC037-163-191743-
/O.EXP.KMPX.SV.W.0164.000000T0000Z-110719T1730Z/
DAKOTA MN-WASHINGTON MN-
1227 PM CDT TUE JUL 19 2011

...THE SEVERE THUNDERSTORM WARNING FOR SOUTHWESTERN WASHINGTON AND
NORTHERN DAKOTA COUNTIES WILL EXPIRE AT 1230 PM CDT...

THE STORM WHICH PROMPTED THE WARNING HAS WEAKENED BELOW SEVERE
LIMITS...AND NO LONGER POSES AN IMMEDIATE THREAT TO LIFE OR
PROPERTY...HOWEVER SMALL HAIL AND GUSTY WINDS ARE STILL POSSIBLE WITH
THIS THUNDERSTORM.

IN ADDITION...STRONG THUNDERSTORMS MAY REDEVELOP...AND A SEVERE 
THUNDERSTORM WATCH REMAINS IN EFFECT UNTIL 3 PM CDT.

LAT...LON 4468 9313 4483 9323 4489 9318 4492 9313
      4492 9305 4489 9302 4489 9298 4492 9298
      4491 9292 4478 9280 4470 9281 4468 9283
      4466 9291
TIME...MOT...LOC 1728Z 332DEG 16KT 4476 9302

$$

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, 10:40 AM CDTSevere Thunderstorm WarningMPXAnoka, Hennepin, Ramsey80 min
Jul 19, 11:11 AM CDTAreal Flood AdvisoryMPXAnoka, Dakota, Ramsey, Washington3 hr

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.