Alert archive / Wisconsin / Severe Thunderstorm Warnings in 2008

Severe Thunderstorm Warning 206, NWS Twin Cities, MN

July 16, 2008Washington County, Minnesota; Polk County, Saint Croix County, Wisconsin

NWS Twin Cities, MN issued this severe thunderstorm warning at Jul 16, 2008, 10:47 AM CDT for Washington County, Minnesota; Polk County, Saint Croix County, Wisconsin. It was in force for 58 min. 2 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: Jul 16, 2008, 10:47 AM CDT (15:47 UTC)
Expired: Jul 16, 2008, 11:45 AM CDT
In force: 58 min
Issued by: NWS Twin Cities, MN
Area: Storm-based polygon

Counties Washington County, MN, Polk County, WI, Saint Croix County, WI

The radar

The Minneapolis radar (KMPX), 78 km from the middle of the area, began a volume at 15:50 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
Jul 16, 11:35 AM CDT	HAIL 1	2 N New Richmond, WI
Jul 16, 11:42 AM CDT	HAIL 1	1 N New Richmond, WI

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 16, 9:57 AM CDT	Severe Thunderstorm Watch	SPC	8 hr

The nearest sounding before it

Minneapolis, MN (KMPX), launched 12:00Z, 3.8 hours before the alert went out and 80 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: 2360 J/kg
Mixed-layer CIN: -126 J/kg
Mixed-layer LCL: 971 m above ground
0-6 km bulk shear: 11 kt
0-1 km storm-relative helicity: 72 m²/s²
0-3 km storm-relative helicity: 122 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 9.4

Open this sounding in Storm Lab

The text

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

000 
WUUS53 KMPX 161547
SVRMPX
MNC163-WIC095-109-161645-
/O.NEW.KMPX.SV.W.0206.080716T1547Z-080716T1645Z/

BULLETIN - EAS ACTIVATION REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE TWIN CITIES/CHANHASSEN MN
1047 AM CDT WED JUL 16 2008

THE NATIONAL WEATHER SERVICE IN THE TWIN CITIES HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  NORTHERN WASHINGTON COUNTY IN EAST CENTRAL MINNESOTA...
  SOUTHWESTERN POLK COUNTY IN NORTHWEST WISCONSIN...
  NORTHERN ST. CROIX COUNTY IN WEST CENTRAL WISCONSIN...

* UNTIL 1145 AM CDT

* AT 1045 AM CDT...RADAR INDICATED A SEVERE THUNDERSTORM...CAPABLE OF
  PRODUCING NICKEL SIZE HAIL AND DAMAGING WINDS IN EXCESS OF 60 MPH. 
  THIS STORM WAS LOCATED 5 MILES EAST OF HUGO...OR ABOUT 16 MILES
  WEST OF NEW RICHMOND...AND MOVING EAST AT 23 MPH.

* SOME LOCATIONS INCLUDE...
  STILLWATER...
  SCANDIA...
  MARINE ON ST CROIX...
  SOMERSET...
  NEW RICHMOND...
  STAR PRAIRIE...
  DEER PARK...
  CYLON...
  AMERY...

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 600 PM CDT
WEDNESDAY EVENING FOR SOUTHERN MINNESOTA AND NORTHWESTERN WISCONSIN.

LAT...LON 4532 9231 4505 9230 4505 9296 4512 9298
      4514 9301 4529 9301
TIME...MOT...LOC 1547Z 272DEG 20KT 4517 9285

$$

The office that day

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

Issued	Product	Office	Counties	Lasted
Jul 16, 4:03 AM CDT	Severe Thunderstorm Warning	MPX	Douglas, Todd	42 min
Jul 16, 4:17 AM CDT	Severe Thunderstorm Warning	MPX	Douglas	28 min
Jul 16, 9:26 AM CDT	Severe Thunderstorm Warning	MPX	Meeker, Sherburne, Stearns, Wright	64 min
Jul 16, 9:57 AM CDT	Severe Thunderstorm Warning	MPX	Douglas, Pope, Stearns, Todd	63 min
Jul 16, 9:38 AM CDT	Severe Thunderstorm Warning	MPX	Barron, Dunn, Polk, Saint Croix	67 min
Jul 16, 9:54 AM CDT	Severe Thunderstorm Warning	MPX	Barron, Rusk	66 min
Jul 16, 10:32 AM CDT	Severe Thunderstorm Warning	MPX	Barron, Chippewa, Dunn	58 min
Jul 16, 11:01 AM CDT	Severe Thunderstorm Warning	MPX	Chippewa, Eau Claire	59 min
Jul 16, 11:18 AM CDT	Severe Thunderstorm Warning	MPX	Chippewa	27 min
Jul 16, 11:29 AM CDT	Severe Thunderstorm Warning	MPX	Barron, Dunn, Polk, Saint Croix	61 min
Jul 16, 11:38 AM CDT	Severe Thunderstorm Warning	MPX	Polk, Saint Croix	23 min
Jul 16, 12:53 PM CDT	Severe Thunderstorm Warning	MPX	Chippewa, Dunn, Eau Claire	41 min

Nearby

Severe Thunderstorm Warnings in Wisconsin, 2008 Severe Thunderstorm Warnings in Minnesota, 2008 Every severe thunderstorm warning in 2008

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.