Alert archive / Minnesota / Severe Thunderstorm Warnings in 2016

Severe Thunderstorm Warning 210, NWS Twin Cities, MN

August 18, 2016Brown County, Nicollet County, Redwood County, Minnesota

NWS Twin Cities, MN issued this severe thunderstorm warning at Aug 18, 2016, 2:18 PM CDT for Brown County, Nicollet County, Redwood County, Minnesota. It was in force for 57 min. 3 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
Aug 18, 2016, 2:18 PM CDT (19:18 UTC)
Expired
Aug 18, 2016, 3:15 PM CDT
In force
57 min
Issued by
NWS Twin Cities, MN
Area
Storm-based polygon
Tornado
Possible
Hail
2.5 in
Wind
70.0 mph

Counties Brown County, MN, Nicollet County, MN, Redwood County, MN

The radar

The Minneapolis radar (KMPX), 115 km from the middle of the area, began a volume at 19:20 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
Aug 18, 2:30 PM CDTTSTM WND DMG1 Ne Springfield, MNTWO BOX CARS BLOWN OFF TRACK AT THE CO-OP.
Aug 18, 2:43 PM CDTTSTM WND GST 533 Sse Sleepy Eye, MNREPORTED AT 26227 200TH ST, SLEEPY EYE, MN AIRPORT.
Aug 18, 3:05 PM CDTTSTM WND GST 695 Sse Searles, MNHOME WEATHER SENSOR MEASURED WIND GUST. ALSO HAD TREE DAMAGE IN THE AREA, WITH POWER OUT AS WELL. SPOTTER ALSO REPORTED SOME SOYBEANS HAD BEEN FLATTENED IN NEARBY FIELDS.

Local storm reports filed while the alert was in force, from inside its polygon or its counties.

The nearest sounding before it

Minneapolis, MN (KMPX), launched 12:00Z, 7.3 hours before the alert went out and 113 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 2016-08-18Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 133 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 12:00Z on 2016-08-18The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 67 square meters per square second.1939Sfc1 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
133 J/kg
Mixed-layer CIN
-132 J/kg
Mixed-layer LCL
1165 m above ground
0-6 km bulk shear
26 kt
0-1 km storm-relative helicity
67 m²/s²
0-3 km storm-relative helicity
109 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.0

Open this sounding in Storm Lab

The text

As transmitted.

690 
WUUS53 KMPX 181918
SVRMPX
MNC015-103-127-182015-
/O.NEW.KMPX.SV.W.0210.160818T1918Z-160818T2015Z/

BULLETIN - EAS ACTIVATION REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE TWIN CITIES/CHANHASSEN MN
218 PM CDT THU AUG 18 2016

THE NATIONAL WEATHER SERVICE IN THE TWIN CITIES HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  BROWN COUNTY IN SOUTH CENTRAL MINNESOTA...
  EAST CENTRAL REDWOOD COUNTY IN SOUTHWESTERN MINNESOTA...
  CENTRAL NICOLLET COUNTY IN SOUTH CENTRAL MINNESOTA...

* UNTIL 315 PM CDT

* AT 218 PM CDT...A SEVERE THUNDERSTORM WAS LOCATED NEAR COBDEN...OR
  19 MILES SOUTHEAST OF REDWOOD FALLS...MOVING EAST AT 40 MPH.

  HAZARD...TENNIS BALL SIZE HAIL AND 70 MPH WIND GUSTS. 

  SOURCE...RADAR INDICATED. 

  IMPACT...PEOPLE AND ANIMALS OUTDOORS WILL BE INJURED. EXPECT HAIL 
           DAMAGE TO ROOFS...SIDING...WINDOWS...AND VEHICLES. EXPECT 
           CONSIDERABLE TREE DAMAGE. WIND DAMAGE IS ALSO LIKELY TO 
           MOBILE HOMES...ROOFS...AND OUTBUILDINGS. 

* LOCATIONS IMPACTED INCLUDE...
  NEW ULM...SLEEPY EYE...SPRINGFIELD...HANSKA...EVAN...COBDEN...
  NEW ULM AIRPORT...KLOSSNER...SEARLES AND ESSIG.

THIS INCLUDES U.S. HIGHWAY 14 BETWEEN MILE MARKERS 76 AND 109.
 
PRECAUTIONARY/PREPAREDNESS ACTIONS...

PREPARE IMMEDIATELY FOR LARGE HAIL AND DAMAGING WINDS. PEOPLE OUTSIDE
SHOULD MOVE IMMEDIATELY TO SHELTER INSIDE A STRONG BUILDING. STAY
AWAY FROM WINDOWS.

THIS IS A DANGEROUS STORM. PREPARE IMMEDIATELY FOR LARGE DESTRUCTIVE
HAIL CAPABLE OF PRODUCING SIGNIFICANT DAMAGE. PEOPLE OUTSIDE SHOULD
MOVE TO SHELTER INSIDE A STRONG BUILDING... AND STAY AWAY FROM
WINDOWS.

TORRENTIAL RAINFALL IS OCCURRING WITH THIS STORM...AND MAY LEAD TO
FLASH FLOODING. DO NOT DRIVE YOUR VEHICLE THROUGH FLOODED ROADWAYS.

&&

LAT...LON 4411 9486 4414 9497 4440 9496 4438 9436
      4411 9437 4410 9442
TIME...MOT...LOC 1918Z 279DEG 35KT 4430 9492 

TORNADO...POSSIBLE
HAIL...2.50IN
WIND...70MPH
 
$$
3 follow-up statements
929 
WWUS53 KMPX 181943
SVSMPX

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE TWIN CITIES/CHANHASSEN MN
243 PM CDT THU AUG 18 2016

MNC127-181951-
/O.CAN.KMPX.SV.W.0210.000000T0000Z-160818T2015Z/
REDWOOD MN-
243 PM CDT THU AUG 18 2016

...THE SEVERE THUNDERSTORM WARNING FOR EAST CENTRAL REDWOOD COUNTY IS
CANCELLED...
    
THE SEVERE THUNDERSTORM WHICH PROMPTED THE WARNING HAS MOVED OUT OF
THE WARNED AREA... THEREFORE THE WARNING HAS BEEN CANCELLED.

LAT...LON 4411 9458 4411 9486 4414 9497 4428 9492
      4428 9486 4440 9486 4438 9436 4411 9437
      4410 9452
TIME...MOT...LOC 1941Z 286DEG 29KT 4422 9467 

$$

MNC015-103-182015-
/O.CON.KMPX.SV.W.0210.000000T0000Z-160818T2015Z/
BROWN MN-NICOLLET MN-
243 PM CDT THU AUG 18 2016

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 315 PM CDT
FOR BROWN AND CENTRAL NICOLLET COUNTIES...

AT 241 PM CDT...A SEVERE THUNDERSTORM WAS LOCATED NEAR SLEEPY
EYE...OR 12 MILES SOUTHWEST OF NEW ULM...MOVING EAST AT 35 MPH.

HAZARD...70 MPH WIND GUSTS AND PING PONG BALL SIZE HAIL. 

SOURCE...RADAR INDICATED. 

IMPACT...PEOPLE AND ANIMALS OUTDOORS WILL BE INJURED. EXPECT HAIL 
         DAMAGE TO ROOFS...SIDING...WINDOWS...AND VEHICLES. EXPECT 
         CONSIDERABLE TREE DAMAGE. WIND DAMAGE IS ALSO LIKELY TO 
         MOBILE HOMES...ROOFS...AND OUTBUILDINGS. 

LOCATIONS IMPACTED INCLUDE...
NEW ULM...SLEEPY EYE...HANSKA...EVAN...COBDEN...NEW ULM AIRPORT...
KLOSSNER...SEARLES AND ESSIG.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

PREPARE IMMEDIATELY FOR LARGE HAIL AND DAMAGING WINDS. PEOPLE OUTSIDE
SHOULD MOVE TO A SHELTER...INSIDE A STRONG BUILDING AND AWAY FROM
WINDOWS.

TORRENTIAL RAINFALL IS OCCURRING WITH THIS STORM...AND MAY LEAD TO
FLASH FLOODING. DO NOT DRIVE YOUR VEHICLE THROUGH FLOODED ROADWAYS.

&&

LAT...LON 4411 9458 4411 9486 4414 9497 4428 9492
      4428 9486 4440 9486 4438 9436 4411 9437
      4410 9452
TIME...MOT...LOC 1941Z 286DEG 29KT 4422 9467 

HAIL...1.50IN
WIND...70MPH
 
$$
076 
WWUS53 KMPX 181950
SVSMPX

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE TWIN CITIES/CHANHASSEN MN
250 PM CDT THU AUG 18 2016

MNC015-103-182015-
/O.CON.KMPX.SV.W.0210.000000T0000Z-160818T2015Z/
BROWN MN-NICOLLET MN-
250 PM CDT THU AUG 18 2016

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 315 PM CDT
FOR BROWN AND CENTRAL NICOLLET COUNTIES...

AT 250 PM CDT...A SEVERE THUNDERSTORM WAS LOCATED NEAR HANSKA...OR 8
MILES SOUTHWEST OF NEW ULM...MOVING EAST AT 40 MPH.

HAZARD...60 MPH WIND GUSTS AND HALF DOLLAR SIZE HAIL. 

SOURCE...RADAR INDICATED. 

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

LOCATIONS IMPACTED INCLUDE...
NEW ULM...SLEEPY EYE...HANSKA...NEW ULM AIRPORT...KLOSSNER...
SEARLES AND ESSIG.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

TORRENTIAL RAINFALL IS OCCURRING WITH THIS STORM...AND MAY LEAD TO
FLASH FLOODING. DO NOT DRIVE YOUR VEHICLE THROUGH FLOODED ROADWAYS.

&&

LAT...LON 4411 9458 4411 9486 4418 9485 4423 9481
      4431 9480 4440 9480 4438 9436 4411 9437
      4410 9452
TIME...MOT...LOC 1950Z 279DEG 35KT 4421 9455 

HAIL...1.25IN
WIND...60MPH
 
$$
950 
WWUS53 KMPX 182010
SVSMPX

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE TWIN CITIES/CHANHASSEN MN
310 PM CDT THU AUG 18 2016

MNC015-103-182020-
/O.EXP.KMPX.SV.W.0210.000000T0000Z-160818T2015Z/
BROWN MN-NICOLLET MN-
310 PM CDT THU AUG 18 2016

...THE SEVERE THUNDERSTORM WARNING FOR BROWN AND CENTRAL NICOLLET
COUNTIES WILL EXPIRE AT 315 PM CDT...
        
THE STORM WHICH PROMPTED THE WARNING HAS MOVED OUT OF THE AREA.
THEREFORE THE WARNING WILL BE ALLOWED TO EXPIRE.  HOWEVER GUSTY WINDS
AND HEAVY RAIN ARE STILL POSSIBLE WITH THIS THUNDERSTORM.

A SEVERE THUNDERSTORM WATCH REMAINS IN EFFECT UNTIL 900 PM CDT FOR
SOUTH CENTRAL MINNESOTA.

TO REPORT SEVERE WEATHER...CONTACT YOUR NEAREST LAW ENFORCEMENT
AGENCY. THEY WILL RELAY YOUR REPORT TO THE NATIONAL WEATHER SERVICE
IN THE TWIN CITIES.

LAT...LON 4411 9458 4411 9486 4418 9485 4423 9481
      4431 9480 4440 9480 4438 9436 4411 9437
      4410 9452
TIME...MOT...LOC 2009Z 279DEG 35KT 4421 9455 

$$

The office that day

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

IssuedProductOfficeCountiesLasted
Aug 18, 10:25 AM CDTRiver Flood WarningMPXHennepin, Wright7 days
Aug 18, 1:18 PM CDTSpecial Weather StatementMPXRedwood57 min
Aug 18, 1:43 PM CDTSevere Thunderstorm WarningMPXRedwood47 min
Aug 18, 1:56 PM CDTSevere Thunderstorm WarningMPXBrown, Redwood34 min
Aug 18, 2:06 PM CDTSpecial Weather StatementMPXRenville39 min
Aug 18, 2:26 PM CDTSpecial Weather StatementMPXBrown49 min
Aug 18, 2:59 PM CDTSevere Thunderstorm WarningMPXBlue Earth, Le Sueur, Nicollet61 min
Aug 18, 3:02 PM CDTSpecial Weather StatementMPXRice58 min
Aug 18, 3:41 PM CDTSpecial Weather StatementMPXSteele, Waseca64 min
Aug 18, 3:47 PM CDTSpecial Weather StatementMPXFreeborn58 min
Aug 18, 3:57 PM CDTSevere Thunderstorm WarningMPXFaribault, Freeborn, Steele, Waseca63 min
Aug 18, 4:09 PM CDTSevere Thunderstorm WarningMPXSteele, Waseca36 min
Aug 18, 4:45 PM CDTSevere Thunderstorm WarningMPXFreeborn30 min

Nearby

Severe Thunderstorm Warnings in Minnesota, 2016Every severe thunderstorm warning in 2016

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.