Alert archive / Minnesota / Severe Thunderstorm Warnings in 2009

Severe Thunderstorm Warning 35, NWS Twin Cities, MN

July 14, 2009Douglas County, Minnesota

NWS Twin Cities, MN issued this severe thunderstorm warning at Jul 14, 2009, 4:55 PM CDT for Douglas County, Minnesota. It was in force for 50 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: Jul 14, 2009, 4:55 PM CDT (21:55 UTC)
Expired: Jul 14, 2009, 5:45 PM CDT
In force: 50 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 21:56 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
Jul 14, 5:08 PM CDT	HAIL 0.88	5 Sw Evansville, MN

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
Jul 14, 2:40 PM CDT	Severe Thunderstorm Watch	SPC	6 hr

The nearest sounding before it

Minneapolis, MN (KMPX), launched 12:00Z, 9.9 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: 35 J/kg
Mixed-layer CIN: -90 J/kg
Mixed-layer LCL: 1035 m above ground
0-6 km bulk shear: 23 kt
0-1 km storm-relative helicity: 108 m²/s²
0-3 km storm-relative helicity: 178 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.6

Open this sounding in Storm Lab

The text

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

000 
WUUS53 KMPX 142155
SVRMPX
MNC041-142245-
/O.NEW.KMPX.SV.W.0035.090714T2155Z-090714T2245Z/

BULLETIN - EAS ACTIVATION REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE TWIN CITIES/CHANHASSEN MN
455 PM CDT TUE JUL 14 2009

THE NATIONAL WEATHER SERVICE IN THE TWIN CITIES HAS ISSUED A

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

* UNTIL 545 PM CDT

* AT 453 PM CDT...RADAR INDICATED A SEVERE THUNDERSTORM...CAPABLE OF
  PRODUCING QUARTER SIZE HAIL AND DAMAGING WINDS IN EXCESS OF 60 MPH.
  THIS STORM WAS LOCATED 9 MILES SOUTHWEST OF EVANSVILLE...OR ABOUT
  23 MILES WEST OF ALEXANDRIA...AND MOVING NORTHEAST AT 40 MPH.

* LOCATIONS IN THE WARNING INCLUDE...
  MELBY...
  EVANSVILLE...
  BRANDON...
  GARFIELD...
  MILLERVILLE...
  ALEXANDRIA...
  CARLOS...
  MILTONA...
  OSAKIS...
  ROSE CITY...

AN ADDITIONAL STRONG THUNDERSTORM WAS LOCATED JUST NORTH OF 
GARFIELD. THIS STORM COULD STRENGTHEN AND BECOME SEVERE... AND WOULD 
IMPACT NORTHEAST DOUGLAS COUNTY.

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.

SEVERE THUNDERSTORMS CAN PRODUCE TORNADOES WITH LITTLE OR NO ADVANCE
WARNING. PREPARE TO MOVE TO A PLACE OF SAFETY IN A STURDY STRUCTURE
SUCH AS A BASEMENT OR SMALL INTERIOR ROOM IF A TORNADO IS SPOTTED.

A SEVERE THUNDERSTORM WATCH REMAINS IN EFFECT UNTIL 900 PM CDT
TUESDAY EVENING FOR SOUTHERN MINNESOTA.

&&

LAT...LON 4611 9557 4611 9515 4583 9514 4581 9576
      4612 9576 4612 9557
TIME...MOT...LOC 2155Z 246DEG 34KT 4595 9581

$$

LS

The office that day

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

Issued	Product	Office	Counties	Lasted
Jul 14, 1:42 PM CDT	Special Weather Statement	MPX	Todd	78 min
Jul 14, 2:19 PM CDT	Special Weather Statement	MPX	Stearns	41 min
Jul 14, 2:26 PM CDT	Special Weather Statement	MPX	Morrison	49 min
Jul 14, 3:06 PM CDT	Special Weather Statement	MPX	Pope	39 min
Jul 14, 3:22 PM CDT	Special Weather Statement	MPX	Todd	38 min
Jul 14, 3:36 PM CDT	Special Weather Statement	MPX	Kandiyohi	39 min
Jul 14, 3:47 PM CDT	Severe Thunderstorm Warning	MPX	Kandiyohi	28 min
Jul 14, 3:49 PM CDT	Severe Thunderstorm Warning	MPX	Morrison, Todd	43 min
Jul 14, 4:11 PM CDT	Special Weather Statement	MPX	Pope	49 min
Jul 14, 4:23 PM CDT	Tornado Warning	MPX	Pope, Swift	37 min
Jul 14, 4:36 PM CDT	Severe Thunderstorm Warning	MPX	Kandiyohi, Meeker, Stearns	39 min
Jul 14, 4:44 PM CDT	Tornado Warning	MPX	Kandiyohi, Meeker, Stearns	46 min
Jul 14, 4:48 PM CDT	Tornado Warning	MPX	Pope, Stearns	42 min
Jul 14, 5:00 PM CDT	Tornado Warning	MPX	Kandiyohi, Meeker, Stearns	45 min
Jul 14, 5:13 PM CDT	Tornado Warning	MPX	Douglas	47 min
Jul 14, 5:32 PM CDT	Tornado Warning	MPX	Stearns	28 min
Jul 14, 5:38 PM CDT	Special Weather Statement	MPX	Todd	37 min
Jul 14, 5:48 PM CDT	Flash Flood Warning	MPX	Morrison, Todd	2 hr
Jul 14, 5:50 PM CDT	Special Weather Statement	MPX	Benton	25 min
Jul 14, 5:54 PM CDT	Special Weather Statement	MPX	Todd	66 min
Jul 14, 6:04 PM CDT	Special Weather Statement	MPX	Benton	26 min
Jul 14, 6:07 PM CDT	Special Weather Statement	MPX	Sherburne	23 min
Jul 14, 6:11 PM CDT	Severe Thunderstorm Warning	MPX	Benton, Sherburne, Stearns	52 min
Jul 14, 6:18 PM CDT	Tornado Warning	MPX	Benton, Sherburne, Stearns	42 min
Jul 14, 6:39 PM CDT	Special Weather Statement	MPX	Morrison	51 min
Jul 14, 6:41 PM CDT	Areal Flood Warning	MPX	Benton, Stearns	4 hr
Jul 14, 6:57 PM CDT	Special Weather Statement	MPX	Sherburne	48 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.