Alert archive / Minnesota / Severe Thunderstorm Warnings in 2018

Severe Thunderstorm Warning 118, NWS Twin Cities, MN

August 3, 20184 counties in Minnesota

NWS Twin Cities, MN issued this severe thunderstorm warning at Aug 3, 2018, 7:33 PM CDT for 4 counties in Minnesota. It was in force for 27 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
Aug 3, 2018, 7:33 PM CDT (00:33 UTC)
Expired
Aug 3, 2018, 8:00 PM CDT
In force
27 min
Issued by
NWS Twin Cities, MN
Area
Storm-based polygon
Hail
0.75 in
Wind
60.0 mph

Counties Benton County, MN, Mille Lacs County, MN, Sherburne County, MN, Wright County, MN

The radar

The Minneapolis radar (KMPX), 66 km from the middle of the area, began a volume at 00:37 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.

What was reported inside it

TimeReportWhereRemark
Aug 3, 7:51 PM CDTTSTM WND GST 43St. Cloud Ap, MNASOS STATION STC, ST. CLOUD AP.

Local storm reports filed while the alert was in force, from inside its polygon or its counties.

The nearest sounding before it

Minneapolis, MN (KMPX), launched 00:00Z, 0.6 hours before the alert went out and 65 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 2018-08-04Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 3195 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 2018-08-04The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 164 square meters per square second.193958Sfc1 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
3195 J/kg
Mixed-layer CIN
-10 J/kg
Mixed-layer LCL
1086 m above ground
0-6 km bulk shear
23 kt
0-1 km storm-relative helicity
164 m²/s²
0-3 km storm-relative helicity
230 m²/s²
Significant tornado parameter
3.0
Supercell composite
17.5

Open this sounding in Storm Lab

The text

As transmitted.

391 
WUUS53 KMPX 040033
SVRMPX
MNC009-095-141-171-040100-
/O.NEW.KMPX.SV.W.0118.180804T0033Z-180804T0100Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service Twin Cities/Chanhassen MN
733 PM CDT FRI AUG 3 2018

The National Weather Service in The Twin Cities has issued a

* Severe Thunderstorm Warning for...
  Eastern Wright County in central Minnesota...
  South central Mille Lacs County in east central Minnesota...
  Southeastern Benton County in central Minnesota...
  Sherburne County in central Minnesota...

* Until 800 PM CDT.

* At 732 PM CDT, severe thunderstorms were located along a line
  extending from near St Cloud Airport to Becker to near Buffalo,
  moving northeast at 55 mph.

  HAZARD...60 mph wind gusts.

  SOURCE...Radar indicated.

  IMPACT...Expect damage to roofs, siding, and trees.

* Severe thunderstorms will be near...
  St. Michael, Big Lake, Albertville, Zimmerman and Foley around 745 
  PM CDT.
  Elk River and Otsego around 750 PM CDT.
  Princeton around 755 PM CDT.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

For your protection move to an interior room on the lowest floor of a
building.

&&

LAT...LON 4556 9351 4524 9352 4519 9366 4517 9364
      4505 9386 4533 9390 4545 9410 4546 9410
      4551 9415 4551 9414 4557 9416 4568 9392
TIME...MOT...LOC 0032Z 237DEG 46KT 4550 9407 4540 9390 4521 9384 

HAIL...<.75IN
WIND...60MPH
 
$$

BORGHOFF
2 follow-up statements
485 
WWUS53 KMPX 040047
SVSMPX

Severe Weather Statement
National Weather Service Twin Cities/Chanhassen MN
747 PM CDT FRI AUG 3 2018

MNC009-095-141-171-040100-
/O.CON.KMPX.SV.W.0118.000000T0000Z-180804T0100Z/
Wright MN-Mille Lacs MN-Benton MN-Sherburne MN-
747 PM CDT FRI AUG 3 2018

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 800 PM CDT
FOR EASTERN WRIGHT...SOUTH CENTRAL MILLE LACS...SOUTHEASTERN BENTON
AND SHERBURNE COUNTIES...

At 747 PM CDT, severe thunderstorms were located along a line
extending from near Duelm to Sherburne National Wildlife Refuge to
near Otsego, moving northeast at 45 mph.

HAZARD...60 mph wind gusts.

SOURCE...Radar indicated.

IMPACT...Expect damage to roofs, siding, and trees.

These severe storms will be near...
  Elk River and Zimmerman around 755 PM CDT.
  Princeton around 800 PM CDT.

Other locations impacted by these severe thunderstorms include
Sherburne National Wildlife Refuge, Duelm, Buffalo Airport, Orrock,
Santiago, Glendorado, Parent, St Cloud Airport, Princeton Airport and
Hanover.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

For your protection move to an interior room on the lowest floor of a
building.

&&

LAT...LON 4556 9351 4524 9352 4519 9366 4517 9364
      4505 9386 4538 9381 4548 9399 4557 9416
      4568 9392
TIME...MOT...LOC 0047Z 235DEG 41KT 4557 9399 4548 9374 4529 9368 

HAIL...<.75IN
WIND...60MPH
 
$$

BORGHOFF
939 
WWUS53 KMPX 040100
SVSMPX

Severe Weather Statement
National Weather Service Twin Cities/Chanhassen MN
800 PM CDT FRI AUG 3 2018

MNC009-095-141-171-040109-
/O.EXP.KMPX.SV.W.0118.000000T0000Z-180804T0100Z/
Wright MN-Mille Lacs MN-Benton MN-Sherburne MN-
800 PM CDT FRI AUG 3 2018

...THE SEVERE THUNDERSTORM WARNING FOR EASTERN WRIGHT...SOUTH CENTRAL
MILLE LACS...SOUTHEASTERN BENTON AND SHERBURNE COUNTIES WILL EXPIRE
AT 800 PM CDT...
            
The storms which prompted the warning have weakened below severe
limits, and no longer pose an immediate threat to life or property.
Therefore, the warning will be allowed to expire.

To report severe weather, contact your nearest law enforcement
agency. They will relay your report to the National Weather Service
The Twin Cities.

LAT...LON 4556 9351 4524 9352 4519 9366 4517 9364
      4505 9386 4538 9381 4548 9399 4557 9416
      4568 9392
TIME...MOT...LOC 0059Z 237DEG 46KT 4565 9381 4556 9356 4537 9350 

$$

BORGHOFF

The office that day

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

IssuedProductOfficeCountiesLasted
Aug 3, 7:02 PM CDTSevere Thunderstorm WarningMPXStearns, Wright43 min
Aug 3, 7:41 PM CDTSpecial Weather StatementMPXRenville49 min
Aug 3, 10:19 PM CDTFlash Flood WarningMPXBenton, Sherburne, Stearns3 hr
Aug 4, 12:05 AM CDTSpecial Weather StatementMPXIsanti25 min
Aug 4, 12:17 AM CDTSevere Thunderstorm WarningMPXChisago, Washington28 min
Aug 4, 12:41 AM CDTSpecial Weather StatementMPXMille Lacs34 min
Aug 4, 12:43 AM CDTSpecial Weather StatementMPXIsanti32 min
Aug 4, 1:15 AM CDTSpecial Weather StatementMPXKanabec30 min

Nearby

Severe Thunderstorm Warnings in Minnesota, 2018Every severe thunderstorm warning in 2018

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.