Alert archive / Minnesota / Severe Thunderstorm Warnings in 2020

Severe Thunderstorm Warning 68, NWS Twin Cities, MN

July 17, 20204 counties in Minnesota

NWS Twin Cities, MN issued this severe thunderstorm warning at Jul 17, 2020, 10:58 PM CDT for 4 counties in Minnesota. It was in force for 77 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
Jul 17, 2020, 10:58 PM CDT (03:58 UTC)
Expired
Jul 18, 2020, 12:15 AM CDT
In force
77 min
Issued by
NWS Twin Cities, MN
Area
Storm-based polygon
Hail
0.75 in
Wind
60.0 mph

Counties Mille Lacs County, MN, Morrison County, MN, Stearns County, MN, Todd County, MN

The radar

The Minneapolis radar (KMPX), 134 km from the middle of the area, began a volume at 04:01 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 watch it was issued in

The SPC watch in force over the same counties when this warning went out.

IssuedProductOfficeLasted
Jul 17, 5:39 PM CDTSevere Thunderstorm Watch PDSSPC8 hr

The nearest sounding before it

Minneapolis, MN (KMPX), launched 00:00Z, 4.0 hours before the alert went out and 133 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 2020-07-18Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 1995 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 2020-07-18The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 35 square meters per square second.1939Sfc1 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
1995 J/kg
Mixed-layer CIN
-87 J/kg
Mixed-layer LCL
1267 m above ground
0-6 km bulk shear
22 kt
0-1 km storm-relative helicity
35 m²/s²
0-3 km storm-relative helicity
218 m²/s²
Significant tornado parameter
0.0
Supercell composite
5.8

Open this sounding in Storm Lab

The text

As transmitted.

789 
WUUS53 KMPX 180358
SVRMPX
MNC095-097-145-153-180515-
/O.NEW.KMPX.SV.W.0068.200718T0358Z-200718T0515Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service Twin Cities/Chanhassen MN
1058 PM CDT Fri Jul 17 2020

The National Weather Service in The Twin Cities has issued a

* Severe Thunderstorm Warning for...
  Northern Mille Lacs County in east central Minnesota...
  Southern Todd County in central Minnesota...
  Northwestern Stearns County in central Minnesota...
  Morrison County in central Minnesota...

* Until 1215 AM CDT.

* At 1057 PM CDT, severe thunderstorms were located along a line
  extending from 6 miles northwest of Mille Lacs Lake to near Randall
  to near Alexandria, moving southeast at 25 mph.

  HAZARD...60 mph wind gusts.

  SOURCE...Radar indicated.

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

* Severe thunderstorms will be near...
  Camp Ripley around 1110 PM CDT.
  Little Falls and Mille Lacs Lake around 1120 PM CDT.
  Sauk Centre around 1140 PM CDT.
  Lastrup around 1145 PM CDT.
  Pierz and Isle around 1150 PM CDT.
  Melrose around 1200 AM CDT.

Other locations impacted by these severe thunderstorms include St.
Rosa, Round Prairie, Camp Ripley Junction, Sobieski, Burtrum, Lake
Mille Lacs, Harding, Hillman, Pleasant Beach and Long Prairie
Airport. This also includes Grand Casino Mille Lacs.
 
PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

LAT...LON 4625 9343 4609 9343 4598 9370 4582 9416
      4582 9435 4578 9429 4577 9431 4556 9513
      4598 9515 4616 9438 4616 9381 4624 9381
TIME...MOT...LOC 0357Z 307DEG 21KT 4640 9376 4613 9446 4589 9525 

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

BORGHOFF
2 follow-up statements
561 
WWUS53 KMPX 180418
SVSMPX

Severe Weather Statement
National Weather Service Twin Cities/Chanhassen MN
1118 PM CDT Fri Jul 17 2020

MNC095-097-145-153-180515-
/O.CON.KMPX.SV.W.0068.000000T0000Z-200718T0515Z/
Mille Lacs MN-Todd MN-Stearns MN-Morrison MN-
1118 PM CDT Fri Jul 17 2020

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 1215 AM CDT
FOR NORTHERN MILLE LACS...SOUTHERN TODD...NORTHWESTERN STEARNS AND
MORRISON COUNTIES...

At 1118 PM CDT, severe thunderstorms were located along a line
extending from near Mille Lacs Lake to near Camp Ripley to near Lake
Osakis, moving southeast at 25 mph.

HAZARD...60 mph wind gusts.

SOURCE...Radar indicated.

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

These severe storms will be near...
  Little Falls and Mille Lacs Lake around 1125 PM CDT.
  Lastrup around 1145 PM CDT.
  Pierz and Isle around 1150 PM CDT.
  Melrose around 1200 AM CDT.
  St. Anthony around 1220 AM CDT.

Other locations impacted by these severe thunderstorms include St.
Rosa, Round Prairie, Camp Ripley Junction, Sobieski, Burtrum, Lake
Mille Lacs, Harding, Hillman, Pleasant Beach and Long Prairie
Airport.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

LAT...LON 4625 9343 4609 9343 4598 9370 4582 9416
      4582 9435 4578 9429 4577 9431 4556 9513
      4598 9515 4616 9438 4616 9381 4624 9381
TIME...MOT...LOC 0418Z 307DEG 21KT 4633 9363 4606 9433 4582 9512 

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

BORGHOFF
041 
WWUS53 KMPX 180441
SVSMPX

Severe Weather Statement
National Weather Service Twin Cities/Chanhassen MN
1141 PM CDT Fri Jul 17 2020

MNC095-097-145-153-180515-
/O.CON.KMPX.SV.W.0068.000000T0000Z-200718T0515Z/
Mille Lacs MN-Todd MN-Stearns MN-Morrison MN-
1141 PM CDT Fri Jul 17 2020

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 1215 AM CDT
FOR NORTHERN MILLE LACS...SOUTHERN TODD...NORTHWESTERN STEARNS AND
MORRISON COUNTIES...

At 1141 PM CDT, severe thunderstorms were located along a line
extending from 6 miles southeast of Malmo to near Little Falls to
Sauk Centre, moving southeast at 20 mph.

HAZARD...60 mph wind gusts.

SOURCE...Radar indicated.

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

These severe storms will be near...
  Isle around 1155 PM CDT.
  Royalton around 1205 AM CDT.
  St. Anthony around 1225 AM CDT.

Other locations impacted by these severe thunderstorms include St.
Rosa, Round Prairie, Camp Ripley Junction, Sobieski, Burtrum, Lake
Mille Lacs, Harding, Hillman, Pleasant Beach and Long Prairie
Airport.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

LAT...LON 4625 9343 4609 9343 4598 9370 4582 9416
      4582 9435 4578 9429 4577 9431 4556 9513
      4584 9514 4616 9412 4616 9381 4624 9381
TIME...MOT...LOC 0441Z 309DEG 18KT 4625 9346 4596 9433 4574 9495 

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

BORGHOFF

The office that day

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

IssuedProductOfficeCountiesLasted
Jul 17, 9:08 PM CDTSpecial Weather StatementMPXDouglas67 min
Jul 17, 9:22 PM CDTSevere Thunderstorm WarningMPXTodd53 min
Jul 17, 10:13 PM CDTSevere Thunderstorm WarningMPXMorrison, Todd62 min
Jul 17, 10:16 PM CDTTornado WarningMPXMorrison, Todd44 min
Jul 17, 10:20 PM CDTSevere Thunderstorm WarningMPXDouglas55 min
Jul 17, 10:54 PM CDTSevere Thunderstorm WarningMPXDouglas, Pope, Stevens66 min
Jul 17, 11:51 PM CDTTornado WarningMPXPope, Stearns, Swift28 min
Jul 17, 11:58 PM CDTSevere Thunderstorm WarningMPXBenton, Kandiyohi, Morrison, Stearns77 min
Jul 18, 12:13 AM CDTSpecial Weather StatementMPXKanabec, Mille Lacs62 min
Jul 18, 12:26 AM CDTSevere Thunderstorm WarningMPXBenton, Isanti, Meeker, Mille Lacs, Sherburne, Stearns and 1 more49 min
Jul 18, 12:32 AM CDTSpecial Weather StatementMPXLac qui Parle, Swift43 min
Jul 18, 12:44 AM CDTSevere Thunderstorm WarningMPXChippewa, Kandiyohi, Lac qui Parle, Renville, Swift, Yellow Medicine61 min
Jul 18, 1:03 AM CDTTornado WarningMPXChisago, Isanti, Kanabec27 min
Jul 18, 1:16 AM CDTSevere Thunderstorm WarningMPXKandiyohi, Meeker, Stearns44 min
Jul 18, 1:19 AM CDTSpecial Weather StatementMPXAnoka, Chisago, Hennepin, Isanti, Wright56 min
Jul 18, 1:38 AM CDTSpecial Weather StatementMPXMcLeod, Meeker, Redwood, Renville52 min
Jul 18, 3:03 AM CDTSevere Thunderstorm WarningMPXCarver, Dakota, Hennepin, Scott, Washington42 min
Jul 18, 3:43 AM CDTSpecial Weather StatementMPXGoodhue, Rice32 min
Jul 18, 4:06 AM CDTSpecial Weather StatementMPXWatonwan39 min
Jul 18, 5:09 AM CDTSpecial Weather StatementMPXFreeborn, Steele, Waseca66 min
Jul 18, 5:00 PM CDTSpecial Weather StatementMPXAnoka30 min
Jul 18, 5:23 PM CDTSevere Thunderstorm WarningMPXAnoka52 min
Jul 18, 5:48 PM CDTTornado WarningMPXAnoka42 min
Jul 18, 6:07 PM CDTTornado WarningMPXWashington38 min

Nearby

Severe Thunderstorm Warnings in Minnesota, 2020Every severe thunderstorm warning in 2020

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.