Alert archive / Wisconsin / Special Weather Statements in 2009

Special Weather Statement, NWS Twin Cities, MN

August 8, 2009Saint Croix County, Wisconsin

NWS Twin Cities, MN issued this special weather statement at Aug 8, 2009, 10:33 AM CDT for Saint Croix County, Wisconsin. It was in force for 57 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 8, 2009, 10:33 AM CDT (15:33 UTC)
Expired: Aug 8, 2009, 11:30 AM CDT
In force: 57 min
Issued by: NWS Twin Cities, MN

County Saint Croix County, WI

The radar

The Minneapolis radar (KMPX), 87 km from the middle of the area, began a volume at 15:37 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 nearest sounding before it

Minneapolis, MN (KMPX), launched 12:00Z, 3.6 hours before the alert went out and 89 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: 368 J/kg
Mixed-layer CIN: -296 J/kg
Mixed-layer LCL: 896 m above ground
0-6 km bulk shear: 40 kt
0-1 km storm-relative helicity: 237 m²/s²
0-3 km storm-relative helicity: 260 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 2.2

Open this sounding in Storm Lab

The text

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

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What forecasters said that day

The local office's own words before this special weather statement went out, as it sent them, from the Iowa Environmental Mesonet's archive of National Weather Service text.

NWS Twin Cities, MN wrote its last area forecast discussion before this special weather statement went out at Aug 8, 6:57 AM CDT, 3 hours 36 minutes earlier.

Area forecast discussion, Aug 8, 6:57 AM CDT, 3 hours 36 minutes before

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Hazardous weather outlook, Aug 8, 5:05 AM CDT, 5 hours 28 minutes before

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In the hours before

Local storm report, Aug 8, 9:22 AM CDT, 1 hour 11 minutes before

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Special weather statement, Aug 8, 9:32 AM CDT, 1 hour 1 minute before

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Local storm report, Aug 8, 9:33 AM CDT, 1 hour before

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Local storm report, Aug 8, 9:58 AM CDT, 35 minutes before

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Special weather statement, Aug 8, 10:18 AM CDT, 15 minutes before

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Special weather statement, Aug 8, 10:33 AM CDT, 0 minutes before

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The office that day

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

Issued	Product	Office	Counties	Lasted
Aug 7, 10:39 PM CDT	Special Weather Statement	MPX	Sibley	51 min
Aug 7, 11:04 PM CDT	Special Weather Statement	MPX	Renville	26 min
Aug 8, 12:24 AM CDT	Areal Flood Advisory	MPX	Anoka, Carver, Dakota, Hennepin, McLeod, Ramsey and 3 more	3 hr
Aug 8, 12:28 AM CDT	Areal Flood Advisory	MPX	Anoka, Carver, Dakota, Hennepin, McLeod, Ramsey and 3 more	3 hr
Aug 8, 1:01 AM CDT	Flash Flood Warning	MPX	Carver, Dakota, Hennepin, Ramsey, Washington	4 hr
Aug 8, 1:48 AM CDT	Flash Flood Warning	MPX	Carver, Dakota, Scott, Washington	4 hr
Aug 8, 4:06 AM CDT	Flash Flood Watch	MPX	Anoka, Carver, Chippewa, Dakota, Goodhue, Hennepin and 14 more	19 hr
Aug 8, 4:11 AM CDT	Severe Thunderstorm Warning	MPX	Meeker, Sherburne, Stearns, Wright	38 min
Aug 8, 4:19 AM CDT	Heat Advisory	MPX	Blue Earth, Brown, Carver, Dakota, Faribault, Freeborn and 14 more	14 hr
Aug 8, 5:02 AM CDT	Areal Flood Advisory	MPX	Benton, Mille Lacs, Sherburne, Stearns, Wright	3 hr
Aug 8, 5:29 AM CDT	Special Weather Statement	MPX	Benton	61 min
Aug 8, 8:06 AM CDT	Severe Thunderstorm Warning	MPX	Renville	39 min
Aug 8, 9:32 AM CDT	Special Weather Statement	MPX	Hennepin, Ramsey	43 min
Aug 8, 9:43 AM CDT	Flash Flood Warning	MPX	Anoka, Hennepin, Wright	3 hr
Aug 8, 3:46 PM CDT	Severe Thunderstorm Warning	MPX	Brown, Redwood	28 min
Aug 8, 2:03 AM CDT	Flash Flood Warning	MPX	Dunn, Eau Claire, Pepin, Pierce	4 hr
Aug 8, 8:11 AM CDT	Special Weather Statement	MPX	Polk	49 min
Aug 8, 8:37 AM CDT	Severe Thunderstorm Warning	MPX	Polk, Saint Croix	38 min
Aug 8, 9:05 AM CDT	Special Weather Statement	MPX	Barron	40 min
Aug 8, 10:18 AM CDT	Special Weather Statement	MPX	Chippewa	42 min
Aug 8, 10:59 AM CDT	Severe Thunderstorm Warning	MPX	Dunn, Saint Croix	46 min
Aug 8, 11:58 AM CDT	Special Weather Statement	MPX	Chippewa	47 min

Nearby

Special Weather Statements in Wisconsin, 2009 Every special weather statement 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; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.