Alert archive / Minnesota / Tornado Warnings in 2020

Tornado Warning 18, NWS Twin Cities, MN

July 18, 2020Washington County, Minnesota

NWS Twin Cities, MN issued this tornado warning at Jul 18, 2020, 6:07 PM CDT for Washington County, Minnesota. It was in force for 38 min. 5 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 18, 2020, 6:07 PM CDT (23:07 UTC)
Expired
Jul 18, 2020, 6:45 PM CDT
In force
38 min
Issued by
NWS Twin Cities, MN
Area
Storm-based polygon
Tornado
Radar indicated
Hail
2.0 in

County Washington County, MN

The radar

The Minneapolis radar (KMPX), 71 km from the middle of the area, began a volume at 23:07 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
Jul 18, 6:12 PM CDTHAIL 1Forest Lake, MN
Jul 18, 6:20 PM CDTHAIL 12 Ssw Forest Lake, MN
Jul 18, 6:23 PM CDTHAIL 2Forest Lake, MNPICTURE ON TWITTER. SEVERAL LARGE STONES.
Jul 18, 6:35 PM CDTHAIL 1.51 S Scandia, MNHAIL WAS PHOTOGRAPHED WITH A RULER.
Jul 18, 6:35 PM CDTHAIL 23 Wsw Scandia, MN

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.

IssuedProductOfficeLasted
Jul 18, 3:53 PM CDTSevere Thunderstorm WatchSPC8 hr

The nearest sounding before it

Minneapolis, MN (KMPX), launched 12:00Z, 11.1 hours before the alert went out and 73 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 12:00Z on 2020-07-18Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 0 joules per kilogram.LCL10008507005003002001001 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 12:00Z on 2020-07-18The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 356 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
0 J/kg
Mixed-layer CIN
No buoyant parcel
Mixed-layer LCL
2513 m above ground
0-6 km bulk shear
47 kt
0-1 km storm-relative helicity
356 m²/s²
0-3 km storm-relative helicity
389 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.0

Open this sounding in Storm Lab

The text

As transmitted.

706 
WFUS53 KMPX 182307
TORMPX
MNC163-182345-
/O.NEW.KMPX.TO.W.0018.200718T2307Z-200718T2345Z/

BULLETIN - EAS ACTIVATION REQUESTED
Tornado Warning
National Weather Service Twin Cities/Chanhassen MN
607 PM CDT Sat Jul 18 2020

The National Weather Service in The Twin Cities has issued a

* Tornado Warning for...
  Northern Washington County in east central Minnesota...

* Until 645 PM CDT.

* At 607 PM CDT, a severe thunderstorm capable of producing a tornado
  was located over Lino Lakes, or 17 miles north of St. Paul, moving
  east at 25 mph.

  HAZARD...Tornado and hail up to two inches in diameter.

  SOURCE...Weather spotters reported funnel cloud.

  IMPACT...Flying debris will be dangerous to those caught without 
           shelter. Mobile homes will be damaged or destroyed. 
           Damage to roofs, windows, and vehicles will occur.  Tree 
           damage is likely.

* This dangerous storm will be near...
  Hugo around 615 PM CDT.
  Scandia around 645 PM CDT.

Other locations impacted by this tornadic thunderstorm include
Otisville, Marine On St Croix, William OBrien State Park and Grant.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

TAKE COVER NOW! Move to a basement or an interior room on the lowest
floor of a sturdy building. Avoid windows. If you are outdoors, in a
mobile home, or in a vehicle, move to the closest substantial shelter
and protect yourself from flying debris.

&&

LAT...LON 4523 9276 4521 9275 4519 9277 4517 9275
      4516 9276 4511 9274 4512 9302 4529 9302
      4530 9275
TIME...MOT...LOC 2307Z 264DEG 20KT 4519 9308 

TORNADO...RADAR INDICATED
HAIL...2.00IN

$$

BORGHOFF
3 follow-up statements
179 
WWUS53 KMPX 182316
SVSMPX

Severe Weather Statement
National Weather Service Twin Cities/Chanhassen MN
616 PM CDT Sat Jul 18 2020

MNC163-182345-
/O.CON.KMPX.TO.W.0018.000000T0000Z-200718T2345Z/
Washington MN-
616 PM CDT Sat Jul 18 2020

...A TORNADO WARNING REMAINS IN EFFECT UNTIL 645 PM CDT FOR NORTHERN
WASHINGTON COUNTY...
        
At 615 PM CDT, a severe thunderstorm capable of producing a tornado
was located over Lino Lakes, or 15 miles north of St. Paul, moving
east at 30 mph.

HAZARD...Tornado and two inch hail.

SOURCE...Weather spotters reported a funnel cloud.

IMPACT...Flying debris will be dangerous to those caught without 
         shelter. Mobile homes will be damaged or destroyed. Damage 
         to roofs, windows, and vehicles will occur.  Tree damage is 
         likely.

This dangerous storm will be near...
  Hugo around 620 PM CDT.
  Scandia around 635 PM CDT.

Other locations impacted by this tornadic thunderstorm include
Otisville, Marine On St Croix, William OBrien State Park and Grant.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

If a tornado or other severe weather is spotted, report it to the
National Weather Service or your local nearest law enforcement agency
who will send your report. This act may save lives of others in the
path of dangerous weather.

&&

LAT...LON 4523 9276 4521 9275 4519 9277 4517 9275
      4516 9276 4511 9274 4512 9302 4529 9302
      4530 9275
TIME...MOT...LOC 2315Z 274DEG 25KT 4516 9303 

TORNADO...RADAR INDICATED
HAIL...2.00IN

$$

BORGHOFF
311 
WWUS53 KMPX 182328
SVSMPX

Severe Weather Statement
National Weather Service Twin Cities/Chanhassen MN
628 PM CDT Sat Jul 18 2020

MNC163-182345-
/O.CON.KMPX.TO.W.0018.000000T0000Z-200718T2345Z/
Washington MN-
628 PM CDT Sat Jul 18 2020

...A TORNADO WARNING REMAINS IN EFFECT UNTIL 645 PM CDT FOR NORTHERN
WASHINGTON COUNTY...
        
At 628 PM CDT, a severe thunderstorm capable of producing a tornado
was located over Hugo, or 16 miles northeast of St. Paul, moving east
at 20 mph.

HAZARD...Tornado and two inch hail.

SOURCE...Weather spotters reported a funnel cloud.

IMPACT...Flying debris will be dangerous to those caught without 
         shelter. Mobile homes will be damaged or destroyed. Damage 
         to roofs, windows, and vehicles will occur.  Tree damage is 
         likely.

This dangerous storm will be near...
  Scandia around 645 PM CDT.

Other locations impacted by this tornadic thunderstorm include
Otisville, Marine On St Croix, William OBrien State Park and Grant.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

If a tornado or other severe weather is spotted, report it to the
National Weather Service or your local nearest law enforcement agency
who will send your report. This act may save lives of others in the
path of dangerous weather.

&&

LAT...LON 4523 9276 4521 9275 4519 9277 4517 9275
      4516 9276 4511 9274 4512 9302 4528 9302
      4530 9275
TIME...MOT...LOC 2328Z 274DEG 17KT 4515 9294 

TORNADO...RADAR INDICATED
HAIL...2.00IN

$$

BORGHOFF
238 
WWUS53 KMPX 182341
SVSMPX

Severe Weather Statement
National Weather Service Twin Cities/Chanhassen MN
641 PM CDT Sat Jul 18 2020

MNC163-182350-
/O.EXP.KMPX.TO.W.0018.000000T0000Z-200718T2345Z/
Washington MN-
641 PM CDT Sat Jul 18 2020

...THE TORNADO WARNING FOR NORTHERN WASHINGTON COUNTY WILL EXPIRE AT
645 PM CDT...
        
The storm which prompted the warning has moved out of the area.
Therefore, the warning will be allowed to expire.

A Severe Thunderstorm Watch remains in effect until 1100 PM CDT for
east central Minnesota...and northwestern and west central Wisconsin.

LAT...LON 4523 9276 4521 9275 4519 9277 4517 9275
      4516 9276 4511 9274 4512 9302 4528 9302
      4530 9275
TIME...MOT...LOC 2340Z 264DEG 20KT 4516 9285 

$$

CEO

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, 10:58 PM CDTSevere Thunderstorm WarningMPXMille Lacs, Morrison, Stearns, Todd77 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

Nearby

Tornado Warnings in Minnesota, 2020Every tornado warning in 2020Tornadoes 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; local storm reports from the same archive; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.