Alert archive / Minnesota / Severe Thunderstorm Warnings in 2009

Severe Thunderstorm Warning 16, NWS Twin Cities, MN

June 18, 2009Douglas County, Minnesota

NWS Twin Cities, MN issued this severe thunderstorm warning at Jun 18, 2009, 1:50 PM CDT for Douglas County, Minnesota. It was in force for 55 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: Jun 18, 2009, 1:50 PM CDT (18:50 UTC)
Expired: Jun 18, 2009, 2:45 PM CDT
In force: 55 min
Issued by: NWS Twin Cities, MN
Area: Storm-based polygon

County Douglas County, MN

The radar

The Minneapolis radar (KMPX), 200 km from the middle of the area, began a volume at 18:50 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
Jun 18, 2:28 PM CDT	HAIL 0.5	Carlos, MN
Jun 18, 2:32 PM CDT	HAIL 1.75	2 N Alexandria, MN	LARGE HAIL ACROSS NORTHERN PART OF CITY.
Jun 18, 2:35 PM CDT	TSTM WND DMG	3 Nne Alexandria, MN	TREE DOWN

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.

Issued	Product	Office	Lasted
Jun 18, 1:50 PM CDT	Severe Thunderstorm Watch	SPC	7 hr

The nearest sounding before it

Minneapolis, MN (KMPX), launched 12:00Z, 6.8 hours before the alert went out and 198 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: 1400 J/kg
Mixed-layer CIN: -119 J/kg
Mixed-layer LCL: 669 m above ground
0-6 km bulk shear: 37 kt
0-1 km storm-relative helicity: 165 m²/s²
0-3 km storm-relative helicity: 165 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 2.4

Open this sounding in Storm Lab

The text

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

000 
WUUS53 KMPX 181850
SVRMPX
MNC041-181945-
/O.NEW.KMPX.SV.W.0016.090618T1850Z-090618T1945Z/

BULLETIN - EAS ACTIVATION REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE TWIN CITIES/CHANHASSEN MN
150 PM CDT THU JUN 18 2009

THE NATIONAL WEATHER SERVICE IN THE TWIN CITIES HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  DOUGLAS COUNTY IN WEST CENTRAL MINNESOTA...

* UNTIL 245 PM CDT

* AT 148 PM CDT...RADAR INDICATED A SEVERE THUNDERSTORM...CAPABLE OF
  PRODUCING DAMAGING WINDS IN EXCESS OF 60 MPH. THIS STORM WAS
  LOCATED NEAR BRANDON...OR ABOUT 12 MILES NORTHWEST OF ALEXANDRIA...
  AND MOVING NORTHEAST AT 15 MPH.

* LOCATIONS IN THE WARNING INCLUDE...
  MILLERVILLE...
  CARLOS...
  MILTONA...
  ROSE CITY...

PRECAUTIONARY/PREPAREDNESS ACTIONS...

IF YOU ARE IN THE PATH OF THIS STORM...PREPARE IMMEDIATELY FOR
DAMAGING WINDS. SEEK SHELTER NOW INSIDE A STURDY STRUCTURE AND STAY
AWAY FROM WINDOWS.

A SEVERE THUNDERSTORM WATCH REMAINS IN EFFECT UNTIL 900 PM CDT
THURSDAY EVENING FOR WEST CENTRAL MINNESOTA.

&&

LAT...LON 4611 9557 4612 9520 4611 9514 4595 9515
      4582 9556 4609 9574 4612 9568 4612 9558
TIME...MOT...LOC 1850Z 232DEG 13KT 4600 9556

$$

TRH

1 follow-up statement

000 
WWUS53 KMPX 181905
SVSMPX

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE TWIN CITIES/CHANHASSEN MN
205 PM CDT THU JUN 18 2009

MNC041-181945-
/O.CON.KMPX.SV.W.0016.000000T0000Z-090618T1945Z/
DOUGLAS MN-
205 PM CDT THU JUN 18 2009

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 245 PM CDT
FOR DOUGLAS COUNTY...

AT 205 PM CDT...RADAR CONTINUED TO INDICATE A SEVERE THUNDERSTORM...
CAPABLE OF PRODUCING QUARTER SIZE HAIL AND DAMAGING WINDS IN EXCESS
OF 60 MPH. THE SEVERE STORM WAS LOCATED 4 MILES EAST OF GARFIELD...
AND MOVING NORTHEAST AT 25 MPH.

OTHER LOCATIONS IN THE WARNING INCLUDE...LEAF VALLEY...CARLOS...BELLE
RIVER...MILTONA AND ROSE CITY.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

IF YOU ARE IN THE PATH OF THIS STORM...PREPARE IMMEDIATELY FOR
DAMAGING WINDS AND LARGE HAIL. SEEK SHELTER NOW INSIDE A STURDY
STRUCTURE AND STAY AWAY FROM WINDOWS.

A SEVERE THUNDERSTORM WATCH REMAINS IN EFFECT UNTIL 900 PM CDT
THURSDAY EVENING FOR WEST CENTRAL MINNESOTA.

&&

LAT...LON 4611 9557 4612 9520 4611 9515 4595 9515
      4584 9549 4609 9574 4612 9568 4612 9558
TIME...MOT...LOC 1905Z 228DEG 20KT 4596 9542

$$

TRH

The office that day

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

Issued	Product	Office	Counties	Lasted
Jun 17, 7:12 PM CDT	Tornado Warning	MPX	Blue Earth, Faribault, Martin, Waseca, Watonwan	33 min
Jun 17, 7:14 PM CDT	Tornado Warning	MPX	Le Sueur, Rice	31 min
Jun 17, 7:16 PM CDT	Tornado Warning	MPX	Freeborn, Steele	44 min
Jun 17, 7:49 PM CDT	Severe Thunderstorm Warning	MPX	Le Sueur, Rice, Steele, Waseca	56 min
Jun 17, 8:04 PM CDT	Tornado Warning	MPX	Rice, Steele, Waseca	26 min
Jun 17, 8:24 PM CDT	Tornado Warning	MPX	Steele	33 min
Jun 17, 9:22 PM CDT	Special Weather Statement	MPX	Goodhue	113 min
Jun 17, 9:53 PM CDT	Special Weather Statement	MPX	Chisago, Dakota, Goodhue, Ramsey, Washington	97 min
Jun 17, 10:48 PM CDT	Severe Thunderstorm Warning	MPX	Dakota, Goodhue, Washington	42 min
Jun 17, 11:08 PM CDT	Special Weather Statement	MPX	Dakota	52 min
Jun 17, 11:20 PM CDT	Severe Thunderstorm Warning	MPX	Goodhue	40 min
Jun 18, 12:55 PM CDT	Severe Thunderstorm Warning	MPX	Douglas	50 min
Jun 18, 2:27 PM CDT	Tornado Warning	MPX	Douglas	48 min
Jun 18, 2:37 PM CDT	Severe Thunderstorm Warning	MPX	Douglas, Todd	53 min
Jun 18, 2:54 PM CDT	Tornado Warning	MPX	Todd	51 min
Jun 18, 3:33 PM CDT	Special Weather Statement	MPX	Stearns	57 min
Jun 18, 3:41 PM CDT	Severe Thunderstorm Warning	MPX	Stearns	64 min
Jun 18, 3:48 PM CDT	Special Weather Statement	MPX	Todd	57 min
Jun 18, 4:16 PM CDT	Special Weather Statement	MPX	Morrison	59 min
Jun 18, 4:47 PM CDT	Severe Thunderstorm Warning	MPX	Morrison, Stearns	43 min
Jun 18, 5:13 PM CDT	Severe Thunderstorm Warning	MPX	Benton, Morrison, Stearns	62 min
Jun 18, 6:04 PM CDT	Severe Thunderstorm Warning	MPX	Benton, Mille Lacs, Morrison	56 min
Jun 18, 6:32 PM CDT	Severe Thunderstorm Warning	MPX	Kanabec	58 min
Jun 18, 6:44 PM CDT	Severe Thunderstorm Warning	MPX	Stevens	61 min

Nearby

Severe Thunderstorm Warnings in Minnesota, 2009 Every severe thunderstorm warning in 2009

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.