Alert archive / Minnesota / Special Weather Statements in 2021

Special Weather Statement, NWS Twin Cities, MN

April 5, 2021Dakota County, Washington County, Minnesota; Pierce County, Saint Croix County, Wisconsin

NWS Twin Cities, MN issued this special weather statement at Apr 5, 2021, 11:49 PM CDT for Dakota County, Washington County, Minnesota; Pierce County, Saint Croix County, Wisconsin. It was in force for 41 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
Apr 5, 2021, 11:49 PM CDT (04:49 UTC)
Expired
Apr 6, 2021, 12:30 AM CDT
In force
41 min
Issued by
NWS Twin Cities, MN

Counties Dakota County, MN, Washington County, MN, Pierce County, WI, Saint Croix County, WI

The radar

The Minneapolis radar (KMPX), 91 km from the middle of the area, began a volume at 04:53 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 00:00Z, 4.8 hours before the alert went out and 93 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-pSkew-T log-p diagram, Minneapolis, MN at 00:00Z on 2021-04-06Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 1134 joules per kilogram.LCLLFCEL10008507005003002001001 km2 km3 km6 km9 km12 km15 km-30°-20°-10°0°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Minneapolis, MN at 00:00Z on 2021-04-06The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 128 square meters per square second.19395878Sfc1 km3 km6 km9 kmRMLM
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
1134 J/kg
Mixed-layer CIN
-84 J/kg
Mixed-layer LCL
2481 m above ground
0-6 km bulk shear
34 kt
0-1 km storm-relative helicity
128 m²/s²
0-3 km storm-relative helicity
256 m²/s²
Significant tornado parameter
0.0
Supercell composite
2.2

Open this sounding in Storm Lab

The text

As transmitted.

349 
WWUS83 KMPX 060449
SPSMPX

Special Weather Statement
National Weather Service Twin Cities/Chanhassen MN
1149 PM CDT Mon Apr 5 2021

MNZ062-063-070-078-WIZ014-015-023>026-060530-
Washington-Dakota-Goodhue-Ramsey-Polk-Barron-Pierce-St.
Croix-Dunn-Pepin-
1149 PM CDT Mon Apr 5 2021

...A LINE OF STORMS WILL AFFECT EASTERN DAKOTA...NORTHWESTERN
GOODHUE...WASHINGTON...EASTERN RAMSEY...NORTH CENTRAL PEPIN...
PIERCE...WESTERN DUNN...ST. CROIX...SOUTHWESTERN BARRON AND
SOUTHEASTERN POLK COUNTIES...

At 1149 PM CDT, radar indicated strong thunderstorms were located
along a line extending from 5 miles north of Stillwater to 5 miles
northeast of Cannon Falls. Movement was east at 55 mph.

Winds in excess of 40 mph and pea size hail are possible with these
storms.

Locations impacted include...
St. Paul, Red Wing, River Falls, Woodbury, Maplewood, Cottage Grove,
Inver Grove Heights, Oakdale, White Bear Lake, Hastings, Rosemount
and South St. Paul.

Frequent cloud to ground lightning is occurring with this storm.
Lightning can strike 10 miles away from a thunderstorm. Seek a safe
shelter inside a building or vehicle.

LAT...LON 4461 9198 4449 9309 4509 9307 4545 9195
TIME...MOT...LOC 0449Z 253DEG 48KT 4513 9279 4458 9283 

$$

TDH

The office that day

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

IssuedProductOfficeCountiesLasted
Apr 5, 7:37 PM CDTSpecial Weather StatementMPXRenville38 min
Apr 5, 7:40 PM CDTSevere Thunderstorm WarningMPXMeeker, Wright50 min
Apr 5, 8:19 PM CDTSpecial Weather StatementMPXKandiyohi, Meeker41 min
Apr 5, 8:26 PM CDTSevere Thunderstorm WarningMPXAnoka, Isanti, Sherburne, Wright49 min
Apr 5, 8:59 PM CDTSpecial Weather StatementMPXRedwood46 min
Apr 5, 9:00 PM CDTSpecial Weather StatementMPXMeeker45 min
Apr 5, 9:10 PM CDTSpecial Weather StatementMPXSherburne35 min
Apr 5, 9:16 PM CDTSevere Thunderstorm WarningMPXSherburne, Stearns, Wright29 min
Apr 5, 9:20 PM CDTSevere Thunderstorm WarningMPXKandiyohi, Meeker25 min
Apr 5, 9:30 PM CDTSpecial Weather StatementMPXRenville30 min
Apr 5, 9:45 PM CDTSevere Thunderstorm WarningMPXMeeker, Wright45 min
Apr 5, 9:48 PM CDTSevere Thunderstorm WarningMPXBenton, Mille Lacs31 min
Apr 5, 9:54 PM CDTSevere Thunderstorm WarningMPXCarver, McLeod, Meeker, Wright36 min
Apr 5, 10:07 PM CDTSpecial Weather StatementMPXKanabec8 min
Apr 5, 10:10 PM CDTSevere Thunderstorm WarningMPXKanabec20 min
Apr 5, 10:27 PM CDTSevere Thunderstorm WarningMPXCarver, Hennepin, McLeod, Wright33 min
Apr 5, 10:34 PM CDTSpecial Weather StatementMPXKanabec26 min
Apr 5, 10:37 PM CDTSpecial Weather StatementMPXWright23 min
Apr 5, 10:59 PM CDTSevere Thunderstorm WarningMPXAnoka, Hennepin, Wright46 min
Apr 5, 11:03 PM CDTSpecial Weather StatementMPXHennepin, Ramsey, Scott42 min
Apr 5, 11:36 PM CDTSpecial Weather StatementMPXAnoka39 min
Apr 5, 11:45 PM CDTSpecial Weather StatementMPXAnoka45 min

Nearby

Special Weather Statements in Minnesota, 2021Special Weather Statements in Wisconsin, 2021Every special weather statement in 2021

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.