Alert archive / Minnesota / Severe Thunderstorm Warnings in 2013

Severe Thunderstorm Warning 149, NWS Twin Cities, MN

August 31, 2013Swift County, Minnesota

NWS Twin Cities, MN issued this severe thunderstorm warning at Aug 31, 2013, 4:47 PM CDT for Swift County, Minnesota. It was in force for 43 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 31, 2013, 4:47 PM CDT (21:47 UTC)
Expired: Aug 31, 2013, 5:30 PM CDT
In force: 43 min
Issued by: NWS Twin Cities, MN
Area: Storm-based polygon
Hail: 1.25 in
Wind: 60.0 mph

County Swift County, MN

The radar

The Aberdeen radar (KABR), 192 km from the middle of the area, began a volume at 21:47 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 31, 2:49 PM CDT	Severe Thunderstorm Watch	SPC	7 hr

The nearest sounding before it

Minneapolis, MN (KMPX), launched 12:00Z, 9.8 hours before the alert went out and 192 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: 75 J/kg
Mixed-layer CIN: -389 J/kg
Mixed-layer LCL: 782 m above ground
0-6 km bulk shear: 31 kt
0-1 km storm-relative helicity: 23 m²/s²
0-3 km storm-relative helicity: 54 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

Open this sounding in Storm Lab

The text

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

300 
WUUS53 KMPX 312147
SVRMPX
MNC151-312230-
/O.NEW.KMPX.SV.W.0149.130831T2147Z-130831T2230Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE TWIN CITIES/CHANHASSEN MN
447 PM CDT SAT AUG 31 2013

THE NATIONAL WEATHER SERVICE IN THE TWIN CITIES HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  SOUTHWESTERN SWIFT COUNTY IN WEST CENTRAL MINNESOTA...

* UNTIL 530 PM CDT

* AT 445 PM CDT...A SEVERE THUNDERSTORM WAS LOCATED 8 MILES SOUTH OF
  ARTICHOKE...AND MOVING EAST AT 35 MPH.

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

  SOURCE...RADAR INDICATED.

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

* LOCATIONS IMPACTED INCLUDE...
  APPLETON...HOLLOWAY...BIG BEND CITY AND DANVERS.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

LAT...LON 4537 9612 4528 9566 4515 9571 4515 9578
      4519 9611 4525 9613 4536 9613
TIME...MOT...LOC 2147Z 277DEG 30KT 4528 9612

HAIL...1.25IN
WIND...60MPH

$$

The office that day

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

Issued	Product	Office	Counties	Lasted
Aug 31, 4:07 PM CDT	Severe Thunderstorm Warning	MPX	Stevens	38 min
Aug 31, 4:32 PM CDT	Severe Thunderstorm Warning	MPX	Douglas, Pope	43 min
Aug 31, 4:34 PM CDT	Severe Thunderstorm Warning	MPX	Chippewa, Lac qui Parle	41 min
Aug 31, 4:43 PM CDT	Severe Thunderstorm Warning	MPX	Pope, Stevens, Swift	47 min
Aug 31, 4:55 PM CDT	Severe Thunderstorm Warning	MPX	Douglas	35 min
Aug 31, 5:12 PM CDT	Severe Thunderstorm Warning	MPX	Chippewa, Renville, Swift	48 min
Aug 31, 5:20 PM CDT	Severe Thunderstorm Warning	MPX	Pope, Stearns, Todd	55 min
Aug 31, 5:30 PM CDT	Severe Thunderstorm Warning	MPX	Kandiyohi, Pope, Stearns, Swift	45 min
Aug 31, 5:41 PM CDT	Severe Thunderstorm Warning	MPX	Lac qui Parle, Yellow Medicine	19 min
Aug 31, 5:47 PM CDT	Severe Thunderstorm Warning	MPX	Benton, Sherburne, Stearns	28 min
Aug 31, 5:53 PM CDT	Severe Thunderstorm Warning	MPX	Chippewa, Kandiyohi, Redwood, Renville, Yellow Medicine	37 min
Aug 31, 5:58 PM CDT	Severe Thunderstorm Warning	MPX	Morrison	47 min
Aug 31, 6:06 PM CDT	Severe Thunderstorm Warning	MPX	Kandiyohi, Meeker, Renville	39 min
Aug 31, 6:22 PM CDT	Severe Thunderstorm Warning	MPX	Redwood, Renville, Yellow Medicine	38 min
Aug 31, 6:53 PM CDT	Severe Thunderstorm Warning	MPX	Brown, Nicollet, Redwood, Renville	52 min

Nearby

Severe Thunderstorm Warnings in Minnesota, 2013 Every severe thunderstorm warning in 2013

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.