Alert archive / Minnesota / Severe Thunderstorm Warnings in 2015

Severe Thunderstorm Warning 77, NWS Twin Cities, MN

July 12, 2015Hennepin County, Wright County, Minnesota

NWS Twin Cities, MN issued this severe thunderstorm warning at Jul 12, 2015, 9:48 PM CDT for Hennepin County, Wright County, Minnesota. It was in force for 57 min. 2 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 12, 2015, 9:48 PM CDT (02:48 UTC)
Expired
Jul 12, 2015, 10:45 PM CDT
In force
57 min
Issued by
NWS Twin Cities, MN
Area
Storm-based polygon
Hail
1.0 in
Wind
60.0 mph

Counties Hennepin County, MN, Wright County, MN

The radar

The Minneapolis radar (KMPX), 23 km from the middle of the area, began a volume at 02:49 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 12, 10:40 PM CDTHAIL 0.75Delano, MN
Jul 12, 10:40 PM CDTHAIL 0.75Delano, 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 12, 5:28 PM CDTTornado WatchSPC5 hr

The nearest sounding before it

Minneapolis, MN (KMPX), launched 00:00Z, 2.8 hours before the alert went out and 24 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 2015-07-13Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 3598 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 2015-07-13The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 124 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
3598 J/kg
Mixed-layer CIN
-75 J/kg
Mixed-layer LCL
1040 m above ground
0-6 km bulk shear
35 kt
0-1 km storm-relative helicity
124 m²/s²
0-3 km storm-relative helicity
116 m²/s²
Significant tornado parameter
1.4
Supercell composite
12.7

Open this sounding in Storm Lab

The text

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

710 
WUUS53 KMPX 130248
SVRMPX
MNC053-171-130345-
/O.NEW.KMPX.SV.W.0077.150713T0248Z-150713T0345Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE TWIN CITIES/CHANHASSEN MN
948 PM CDT SUN JUL 12 2015

THE NATIONAL WEATHER SERVICE IN THE TWIN CITIES HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  HENNEPIN COUNTY IN EAST CENTRAL MINNESOTA...
  SOUTHEASTERN WRIGHT COUNTY IN CENTRAL MINNESOTA...

* UNTIL 1045 PM CDT

* AT 946 PM CDT...SEVERE THUNDERSTORMS WERE LOCATED ALONG A LINE
  EXTENDING FROM NEAR RAMSEY TO NEAR RASSAT...MOVING SOUTHEAST AT 30
  MPH.

  HAZARD...60 MPH WIND GUSTS AND QUARTER SIZE HAIL. 

  SOURCE...RADAR INDICATED. 

  IMPACT...HAIL DAMAGE TO VEHICLES IS EXPECTED. EXPECT WIND DAMAGE 
           TO ROOFS...SIDING AND TREES. 

* SEVERE THUNDERSTORMS WILL BE NEAR...
  RAMSEY...ST. MICHAEL...OTSEGO...ROGERS AND ALBERTVILLE AROUND 950
  PM CDT.
  MAPLE GROVE...CHAMPLIN...ANOKA AND CORCORAN AROUND 955 PM CDT.
  BROOKLYN PARK AROUND 1005 PM CDT.
  PLYMOUTH AROUND 1010 PM CDT.
  BROOKLYN CENTER...FRIDLEY...DELANO AND ROCKFORD AROUND 1015 PM CDT.
  MINNEAPOLIS...GOLDEN VALLEY AND COLUMBIA HEIGHTS AROUND 1020 PM
  CDT.
  MAPLE PLAIN AROUND 1025 PM CDT.
  ROSEVILLE...ORONO...MINNETRISTA AND ST. BONIFACIUS AROUND 1030 PM
  CDT.

OTHER LOCATIONS IMPACTED BY THESE SEVERE THUNDERSTORMS INCLUDE
WOODLAND...NORTH MINNEAPOLIS...OSSEO...GREENFIELD...NEW HOPE...COMO
PARK...CRYSTAL AIRPORT...DAYTON...HAMEL AND HANOVER.

THIS INCLUDES INTERSTATE 94 IN MINNESOTA BETWEEN MILE MARKERS 202 AND
236.
 
PRECAUTIONARY/PREPAREDNESS ACTIONS...

FOR YOUR PROTECTION MOVE TO AN INTERIOR ROOM ON THE LOWEST FLOOR OF A
BUILDING.

&&

A TORNADO WATCH REMAINS IN EFFECT UNTIL 100 AM CDT FOR EAST CENTRAL
MINNESOTA.

LAT...LON 4524 9352 4521 9342 4510 9327 4504 9328
      4503 9321 4494 9320 4488 9352 4489 9352
      4489 9376 4497 9377 4498 9384 4511 9395
      4528 9356
TIME...MOT...LOC 0246Z 314DEG 28KT 4525 9351 4517 9404 

HAIL...1.00IN
WIND...60MPH
 
$$

JRB
2 follow-up statements
696 
WWUS53 KMPX 130318
SVSMPX

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE TWIN CITIES/CHANHASSEN MN
1018 PM CDT SUN JUL 12 2015

MNC053-171-130345-
/O.CON.KMPX.SV.W.0077.000000T0000Z-150713T0345Z/
HENNEPIN MN-WRIGHT MN-
1018 PM CDT SUN JUL 12 2015

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 1045 PM CDT
FOR HENNEPIN AND SOUTHEASTERN WRIGHT COUNTIES...

AT 1017 PM CDT...SEVERE THUNDERSTORMS WERE LOCATED ALONG A LINE
EXTENDING FROM NEAR BROOKLYN PARK TO NEAR MONTROSE...MOVING SOUTHEAST
AT 30 MPH.

HAZARD...60 MPH WIND GUSTS AND PENNY SIZE HAIL. 

SOURCE...PUBLIC MEASURED A 58 MPH WIND GUST NEAR CLEAR LAKE EARLIER 
WITH THIS STORM. 

IMPACT...EXPECT DAMAGE TO ROOFS...SIDING AND TREES. 

THESE SEVERE STORMS WILL BE NEAR...
  BROOKLYN PARK...PLYMOUTH...BROOKLYN CENTER AND FRIDLEY AROUND 1025
PM CDT.
  MINNEAPOLIS...GOLDEN VALLEY AND COLUMBIA HEIGHTS AROUND 1030 PM
CDT.
  MAPLE PLAIN AROUND 1035 PM CDT.
  ROSEVILLE...ORONO...MINNETRISTA AND ST. BONIFACIUS AROUND 1040 PM
CDT.
  ST. PAUL...CHANHASSEN...MOUND...VICTORIA AND EXCELSIOR AROUND 1045
PM CDT.

OTHER LOCATIONS IMPACTED BY THESE SEVERE THUNDERSTORMS INCLUDE
WOODLAND...NORTH MINNEAPOLIS...OSSEO...GREENFIELD...NEW HOPE...COMO
PARK...CRYSTAL AIRPORT...DAYTON...HAMEL AND HANOVER.

THIS INCLUDES INTERSTATE 94 IN MINNESOTA BETWEEN MILE MARKERS 202 AND
236.
 
PRECAUTIONARY/PREPAREDNESS ACTIONS...

FOR YOUR PROTECTION MOVE TO AN INTERIOR ROOM ON THE LOWEST FLOOR OF A
BUILDING.

&&

LAT...LON 4524 9352 4521 9342 4510 9327 4504 9328
      4503 9321 4494 9320 4488 9352 4489 9352
      4489 9376 4497 9377 4498 9384 4511 9395
      4528 9356
TIME...MOT...LOC 0317Z 321DEG 26KT 4514 9334 4506 9387 

HAIL...0.75IN
WIND...60MPH
 
$$

JRB
864 
WWUS53 KMPX 130336
SVSMPX

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE TWIN CITIES/CHANHASSEN MN
1036 PM CDT SUN JUL 12 2015

MNC053-171-130345-
/O.EXP.KMPX.SV.W.0077.000000T0000Z-150713T0345Z/
HENNEPIN MN-WRIGHT MN-
1036 PM CDT SUN JUL 12 2015

...THE SEVERE THUNDERSTORM WARNING FOR HENNEPIN AND SOUTHEASTERN
WRIGHT COUNTIES WILL EXPIRE AT 1045 PM CDT...
            
THE STORMS WHICH PROMPTED THE WARNING HAVE WEAKENED BELOW SEVERE
LIMITS...AND NO LONGER POSE AN IMMEDIATE THREAT TO LIFE OR PROPERTY.
THEREFORE THE WARNING WILL BE ALLOWED TO EXPIRE.

A SEVERE THUNDERSTORM WATCH REMAINS IN EFFECT UNTIL 400 AM CDT FOR
EAST CENTRAL MINNESOTA.

REMEMBER...A SEVERE THUNDERSTORM WARNING STILL REMAINS IN EFFECT FOR
WESTERN WRIGHT COUNTY.

LAT...LON 4524 9352 4521 9342 4510 9327 4504 9328
      4503 9321 4494 9320 4488 9352 4489 9352
      4489 9376 4497 9377 4498 9384 4511 9395
      4528 9356
TIME...MOT...LOC 0333Z 314DEG 28KT 4514 9334 4506 9387 

$$

JRB

The office that day

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

IssuedProductOfficeCountiesLasted
Jul 12, 7:00 PM CDTTornado WarningMPXMorrison, Todd45 min
Jul 12, 7:09 PM CDTTornado WarningMPXPope, Stevens36 min
Jul 12, 7:18 PM CDTTornado WarningMPXMorrison, Todd42 min
Jul 12, 7:20 PM CDTSevere Thunderstorm WarningMPXDouglas, Pope, Stearns, Todd70 min
Jul 12, 7:30 PM CDTSpecial Weather StatementMPXDouglas3 hr
Jul 12, 7:39 PM CDTTornado WarningMPXDouglas30 min
Jul 12, 7:40 PM CDTSevere Thunderstorm WarningMPXBenton, Morrison, Stearns50 min
Jul 12, 7:42 PM CDTTornado WarningMPXPope48 min
Jul 12, 8:16 PM CDTSevere Thunderstorm WarningMPXStearns44 min
Jul 12, 8:24 PM CDTSevere Thunderstorm WarningMPXBenton, Morrison, Sherburne51 min
Jul 12, 8:27 PM CDTSevere Thunderstorm WarningMPXPope33 min
Jul 12, 8:32 PM CDTSevere Thunderstorm WarningMPXKanabec, Mille Lacs28 min
Jul 12, 8:40 PM CDTSpecial Weather StatementMPXDouglas35 min
Jul 12, 8:54 PM CDTSevere Thunderstorm WarningMPXIsanti, Kanabec, Mille Lacs51 min
Jul 12, 8:54 PM CDTSevere Thunderstorm WarningMPXMeeker, Stearns, Wright81 min
Jul 12, 8:59 PM CDTSevere Thunderstorm WarningMPXKandiyohi, Pope, Stearns46 min
Jul 12, 8:59 PM CDTSevere Thunderstorm WarningMPXAnoka, Benton, Isanti, Sherburne61 min
Jul 12, 9:03 PM CDTSpecial Weather StatementMPXChippewa27 min
Jul 12, 9:24 PM CDTSevere Thunderstorm WarningMPXChisago, Isanti51 min
Jul 12, 9:31 PM CDTSpecial Weather StatementMPXKandiyohi29 min
Jul 12, 9:48 PM CDTSevere Thunderstorm WarningMPXAnoka, Isanti, Ramsey, Washington57 min
Jul 12, 10:32 PM CDTSevere Thunderstorm WarningMPXMeeker, Stearns, Wright26 min
Jul 12, 10:45 PM CDTSpecial Weather StatementMPXCarver, Hennepin, McLeod, Ramsey, Washington, Wright60 min
Jul 12, 10:55 PM CDTSevere Thunderstorm WarningMPXCarver, Hennepin, Wright35 min
Jul 12, 11:18 PM CDTSpecial Weather StatementMPXDouglas57 min
Jul 12, 11:18 PM CDTSevere Thunderstorm WarningMPXDakota, Scott19 min
Jul 12, 11:40 PM CDTSpecial Weather StatementMPXDakota, Goodhue, Le Sueur, Rice, Scott50 min
Jul 13, 12:29 AM CDTSpecial Weather StatementMPXTodd46 min
Jul 13, 12:41 AM CDTSpecial Weather StatementMPXGoodhue64 min
Jul 13, 1:23 AM CDTSpecial Weather StatementMPXSherburne52 min
Jul 13, 2:47 AM CDTSpecial Weather StatementMPXWashington58 min

Nearby

Severe Thunderstorm Warnings in Minnesota, 2015Every 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.