Alert archive / Minnesota / Severe Thunderstorm Warnings in 2005

Severe Thunderstorm Warning 375, NWS Twin Cities, MN

September 12, 2005Morrison County, Minnesota

NWS Twin Cities, MN issued this severe thunderstorm warning at Sep 12, 2005, 7:09 AM CDT for Morrison County, Minnesota. It was in force for 66 min. 1 report 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: Sep 12, 2005, 7:09 AM CDT (12:09 UTC)
Expired: Sep 12, 2005, 8:15 AM CDT
In force: 66 min
Issued by: NWS Twin Cities, MN
Area: Counties, with a storm outline in the text

County Morrison County, MN

The radar

The Minneapolis radar (KMPX), 132 km from the middle of the area, began a volume at 12:11 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

Time	Report	Where	Remark
Sep 12, 8:10 AM CDT	TSTM WND DMG	Pierz, MN	TREE LIMBS DOWN.

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, 0.2 hours before the alert went out and 131 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: 858 J/kg
Mixed-layer CIN: -143 J/kg
Mixed-layer LCL: 1027 m above ground
0-6 km bulk shear: 36 kt
0-1 km storm-relative helicity: 107 m²/s²
0-3 km storm-relative helicity: 96 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.

000 
WUUS53 KMPX 121210
SVRMPX
MNC097-121315-
/O.NEW.KMPX.SV.W.0375.050912T1209Z-050912T1315Z/

BULLETIN - EAS ACTIVATION REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE TWIN CITIES/CHANHASSEN MN
709 AM CDT MON SEP 12 2005

THE NATIONAL WEATHER SERVICE IN THE TWIN CITIES HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  MORRISON COUNTY IN CENTRAL MINNESOTA

* UNTIL 815 AM CDT

* AT 707 AM CDT...DOPPLER RADAR INDICATED A SEVERE THUNDERSTORM...
  CAPABLE OF PRODUCING LARGE HAIL. THIS STORM WAS LOCATED 18 MILES
  SOUTHWEST OF LITTLE FALLS...AND MOVING NORTHEAST AT 20 MPH.

* LOCATIONS IMPACTED INCLUDE...
  LITTLE FALLS...
  UPSALA...
  BOWLUS...
  PIERZ...

THIS IS A DANGEROUS STORM. IF YOU ARE IN ITS PATH...PREPARE
IMMEDIATELY FOR DAMAGING WINDS...DESTRUCTIVE HAIL...AND DEADLY CLOUD
TO GROUND LIGHTNING. PEOPLE OUTSIDE SHOULD MOVE TO A SHELTER...
PREFERABLY INSIDE A STRONG BUILDING BUT AWAY FROM WINDOWS.

LAT...LON 4579 9463 4579 9434 4583 9435 4584 9412
      4614 9392 4615 9441

$$

RAH

1 follow-up statement

000 
WWUS53 KMPX 121322
SVSMPX

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE TWIN CITIES/CHANHASSEN MN
819 AM CDT MON SEP 12 2005

MNC097-121329-
/O.EXP.KMPX.SV.W.0375.000000T0000Z-050912T1315Z/
MORRISON MN-
819 AM CDT MON SEP 12 2005

...THE SEVERE THUNDERSTORM WARNING FOR MORRISON COUNTY EXPIRED AT 
815 AM CDT...

AT 812 AM...THREE QUARTER INCH DIAMETER HAIL WAS REPORTED AT 
HILLMAN.

THE SEVERE THUNDERSTORMS HAVE MOVED OUT OF THE NORTHEAST CORNER OF 
MORRISON COUNTY. NO ADDITIONAL WARNINGS ARE ANTICIPATED. 

LAT...LON 4579 9463 4579 9434 4583 9435 4584 9412
      4614 9392 4615 9441

$$
JPR

The office that day

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

Issued	Product	Office	Counties	Lasted
Sep 12, 6:16 AM CDT	Severe Thunderstorm Warning	MPX	Stearns	59 min
Sep 12, 7:14 AM CDT	Severe Thunderstorm Warning	MPX	Kandiyohi	31 min
Sep 12, 8:14 AM CDT	Severe Thunderstorm Warning	MPX	Mille Lacs	31 min
Sep 12, 6:08 PM CDT	Severe Thunderstorm Warning	MPX	Yellow Medicine	67 min
Sep 12, 6:16 PM CDT	Tornado Warning	MPX	Lac qui Parle, Yellow Medicine	59 min

Nearby

Severe Thunderstorm Warnings in Minnesota, 2005 Every severe thunderstorm warning in 2005

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.