Alert archive / Minnesota / Severe Thunderstorm Warnings in 2016

Severe Thunderstorm Warning 214, NWS Twin Cities, MN

August 18, 2016Freeborn County, Minnesota

NWS Twin Cities, MN issued this severe thunderstorm warning at Aug 18, 2016, 4:45 PM CDT for Freeborn County, Minnesota. It was in force for 30 min. No storm report in the archive falls inside the area while it was in force.

The area

The outline as issued.

The facts

Issued: Aug 18, 2016, 4:45 PM CDT (21:45 UTC)
Expired: Aug 18, 2016, 5:15 PM CDT
In force: 30 min
Issued by: NWS Twin Cities, MN
Area: Storm-based polygon
Hail: 0.75 in
Wind: 60.0 mph

County Freeborn County, MN

The radar

The Minneapolis radar (KMPX), 142 km from the middle of the area, began a volume at 21:45 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.

The watch it was issued in

The SPC watch in force over the same counties when this warning went out.

Issued	Product	Office	Lasted
Aug 18, 2:46 PM CDT	Severe Thunderstorm Watch	SPC	6 hr

The nearest sounding before it

Minneapolis, MN (KMPX), launched 12:00Z, 9.8 hours before the alert went out and 142 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-p

Temperature in red, dew point in green, the mixed-layer parcel dashed.

Hodograph

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.

098 
WUUS53 KMPX 182145
SVRMPX
MNC047-182215-
/O.NEW.KMPX.SV.W.0214.160818T2145Z-160818T2215Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE TWIN CITIES/CHANHASSEN MN
445 PM CDT THU AUG 18 2016

THE NATIONAL WEATHER SERVICE IN THE TWIN CITIES HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  SOUTHERN FREEBORN COUNTY IN SOUTH CENTRAL MINNESOTA...

* UNTIL 515 PM CDT

* AT 444 PM CDT...A SEVERE THUNDERSTORM WAS LOCATED OVER
  GLENVILLE...OR NEAR ALBERT LEA...MOVING SOUTHEAST AT 40 MPH.

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

  SOURCE...RADAR INDICATED. 

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

* LOCATIONS IMPACTED INCLUDE...
  ALBERT LEA...GLENVILLE...EMMONS...LONDON...TWIN LAKES...CONGER AND
  MYRTLE.

THIS INCLUDES INTERSTATE 35 BETWEEN MILE MARKERS 1 AND 9.
 
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 4366 9359 4359 9305 4350 9305 4350 9351
TIME...MOT...LOC 2144Z 297DEG 33KT 4361 9328 

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

1 follow-up statement

845 
WWUS53 KMPX 182212
SVSMPX

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

MNC047-182222-
/O.EXP.KMPX.SV.W.0214.000000T0000Z-160818T2215Z/
FREEBORN MN-
512 PM CDT THU AUG 18 2016

...THE SEVERE THUNDERSTORM WARNING FOR SOUTHERN FREEBORN COUNTY WILL
EXPIRE AT 515 PM CDT...
        
THE STORM WHICH PROMPTED THE WARNING HAS MOVED OUT OF THE AREA.
THEREFORE THE WARNING WILL BE ALLOWED TO EXPIRE.

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 4366 9359 4359 9305 4350 9305 4350 9351
TIME...MOT...LOC 2211Z 297DEG 33KT 4361 9328 

$$

BORGHOFF

The office that day

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

Issued	Product	Office	Counties	Lasted
Aug 18, 10:25 AM CDT	River Flood Warning	MPX	Hennepin, Wright	7 days
Aug 18, 1:18 PM CDT	Special Weather Statement	MPX	Redwood	57 min
Aug 18, 1:43 PM CDT	Severe Thunderstorm Warning	MPX	Redwood	47 min
Aug 18, 1:56 PM CDT	Severe Thunderstorm Warning	MPX	Brown, Redwood	34 min
Aug 18, 2:06 PM CDT	Special Weather Statement	MPX	Renville	39 min
Aug 18, 2:18 PM CDT	Severe Thunderstorm Warning	MPX	Brown, Nicollet, Redwood	57 min
Aug 18, 2:26 PM CDT	Special Weather Statement	MPX	Brown	49 min
Aug 18, 2:59 PM CDT	Severe Thunderstorm Warning	MPX	Blue Earth, Le Sueur, Nicollet	61 min
Aug 18, 3:02 PM CDT	Special Weather Statement	MPX	Rice	58 min
Aug 18, 3:41 PM CDT	Special Weather Statement	MPX	Steele, Waseca	64 min
Aug 18, 3:47 PM CDT	Special Weather Statement	MPX	Freeborn	58 min
Aug 18, 3:57 PM CDT	Severe Thunderstorm Warning	MPX	Faribault, Freeborn, Steele, Waseca	63 min
Aug 18, 4:09 PM CDT	Severe Thunderstorm Warning	MPX	Steele, Waseca	36 min

Nearby

Severe Thunderstorm Warnings in Minnesota, 2016 Every 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; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.