Alert archive / Minnesota / Severe Thunderstorm Warnings in 2020

Severe Thunderstorm Warning 37, NWS Twin Cities, MN

July 9, 20204 counties in Minnesota

NWS Twin Cities, MN issued this severe thunderstorm warning at Jul 9, 2020, 4:49 AM CDT for 4 counties in Minnesota. It was in force for 26 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 9, 2020, 4:49 AM CDT (09:49 UTC)
Expired: Jul 9, 2020, 5:15 AM CDT
In force: 26 min
Issued by: NWS Twin Cities, MN
Area: Storm-based polygon
Hail: 1.25 in
Wind: 60.0 mph

Counties Anoka County, MN, Hennepin County, MN, Ramsey County, MN, Washington County, MN

The radar

The Minneapolis radar (KMPX), 39 km from the middle of the area, began a volume at 09:48 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, 9.8 hours before the alert went out and 42 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: 2332 J/kg
Mixed-layer CIN: -31 J/kg
Mixed-layer LCL: 1764 m above ground
0-6 km bulk shear: 14 kt
0-1 km storm-relative helicity: 34 m²/s²
0-3 km storm-relative helicity: 131 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

Open this sounding in Storm Lab

The text

As transmitted.

623 
WUUS53 KMPX 090949
SVRMPX
MNC003-053-123-163-091015-
/O.NEW.KMPX.SV.W.0037.200709T0949Z-200709T1015Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service Twin Cities/Chanhassen MN
449 AM CDT Thu Jul 9 2020

The National Weather Service in The Twin Cities has issued a

* Severe Thunderstorm Warning for...
  Southeastern Hennepin County in east central Minnesota...
  Southeastern Anoka County in east central Minnesota...
  Central Washington County in east central Minnesota...
  Ramsey County in east central Minnesota...

* Until 515 AM CDT.

* At 448 AM CDT, a severe thunderstorm was located over Richfield, or
  near Minneapolis, moving northeast at 40 mph.

  HAZARD...60 mph wind gusts and half dollar size hail.

  SOURCE...Radar indicated.

  IMPACT...Hail damage to vehicles is expected. Expect wind damage 
           to roofs, siding, and trees.

* Locations impacted include...
  Minneapolis, St. Paul, Bloomington, Woodbury, Edina, St. Louis
  Park, Maplewood, Richfield, Roseville, Oakdale, Shoreview and White
  Bear Lake.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

LAT...LON 4495 9278 4490 9304 4492 9305 4492 9313
      4491 9313 4487 9319 4485 9329 4492 9338
      4519 9307
TIME...MOT...LOC 0948Z 232DEG 36KT 4491 9327 

HAIL...1.25IN
WIND...60MPH
 
$$

TDH

2 follow-up statements

836 
WWUS53 KMPX 091002
SVSMPX

Severe Weather Statement
National Weather Service Twin Cities/Chanhassen MN
502 AM CDT Thu Jul 9 2020

MNC003-053-163-091011-
/O.CAN.KMPX.SV.W.0037.000000T0000Z-200709T1015Z/
Hennepin MN-Anoka MN-Washington MN-
502 AM CDT Thu Jul 9 2020

...THE SEVERE THUNDERSTORM WARNING FOR SOUTHEASTERN HENNEPIN...
SOUTHEASTERN ANOKA AND CENTRAL WASHINGTON COUNTIES IS CANCELLED...
    
The severe thunderstorm which prompted the warning has moved out of 
the warned area. Therefore, the warning has been cancelled.

LAT...LON 4507 9298 4491 9299 4490 9304 4492 9305
      4492 9313 4489 9318 4491 9320 4499 9321
      4513 9306
TIME...MOT...LOC 1001Z 232DEG 36KT 4499 9312 

$$

MNC123-091015-
/O.CON.KMPX.SV.W.0037.000000T0000Z-200709T1015Z/
Ramsey MN-
502 AM CDT Thu Jul 9 2020

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 515 AM CDT
FOR RAMSEY COUNTY...

At 501 AM CDT, a severe thunderstorm was located over Roseville, or
near St. Paul, moving northeast at 40 mph.

HAZARD...60 mph wind gusts and quarter size hail.

SOURCE...Radar indicated.

IMPACT...Hail damage to vehicles is expected. Expect wind damage to 
         roofs, siding, and trees.

Locations impacted include...
St. Paul, Maplewood, Roseville, Oakdale, Shoreview, White Bear Lake,
West St. Paul, Vadnais Heights, Arden Hills, Mahtomedi, North St.
Paul and Little Canada.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

LAT...LON 4507 9298 4491 9299 4490 9304 4492 9305
      4492 9313 4489 9318 4491 9320 4499 9321
      4513 9306
TIME...MOT...LOC 1001Z 232DEG 36KT 4499 9312 

HAIL...1.00IN
WIND...60MPH
 
$$

TDH

425 
WWUS53 KMPX 091007
SVSMPX

Severe Weather Statement
National Weather Service Twin Cities/Chanhassen MN
507 AM CDT Thu Jul 9 2020

MNC123-091017-
/O.EXP.KMPX.SV.W.0037.000000T0000Z-200709T1015Z/
Ramsey MN-
507 AM CDT Thu Jul 9 2020

...THE SEVERE THUNDERSTORM WARNING FOR RAMSEY COUNTY WILL EXPIRE AT
515 AM CDT...
                
The storm which prompted the warning has weakened below severe
limits, and no longer poses an immediate threat to life or property.
Therefore, the warning will be allowed to expire.  However small hail
and gusty winds are still possible with this thunderstorm.

LAT...LON 4507 9298 4491 9299 4490 9304 4492 9305
      4492 9313 4489 9318 4491 9320 4499 9321
      4513 9306
TIME...MOT...LOC 1007Z 232DEG 36KT 4503 9305 

$$

TDH

The office that day

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

Issued	Product	Office	Counties	Lasted
Jul 8, 7:15 PM CDT	Special Weather Statement	MPX	Todd	30 min
Jul 8, 7:33 PM CDT	Special Weather Statement	MPX	Todd	27 min
Jul 8, 7:44 PM CDT	Special Weather Statement	MPX	Todd	31 min
Jul 8, 8:24 PM CDT	Severe Thunderstorm Warning	MPX	Mille Lacs	24 min
Jul 8, 8:35 PM CDT	Special Weather Statement	MPX	Kanabec	25 min
Jul 8, 9:28 PM CDT	Special Weather Statement	MPX	Kanabec	32 min
Jul 9, 12:57 AM CDT	Special Weather Statement	MPX	Swift	48 min
Jul 9, 1:56 AM CDT	Special Weather Statement	MPX	Stearns	49 min
Jul 9, 2:44 AM CDT	Special Weather Statement	MPX	Mille Lacs, Morrison	46 min
Jul 9, 3:55 AM CDT	Special Weather Statement	MPX	Carver	35 min
Jul 9, 4:05 AM CDT	Special Weather Statement	MPX	Isanti	25 min
Jul 9, 4:12 AM CDT	Severe Thunderstorm Warning	MPX	Carver, Scott, Sibley	33 min
Jul 9, 4:36 AM CDT	Severe Thunderstorm Warning	MPX	Hennepin, Scott	24 min
Jul 9, 4:39 AM CDT	Special Weather Statement	MPX	Chisago	51 min
Jul 9, 4:47 AM CDT	Severe Thunderstorm Warning	MPX	Blue Earth, Watonwan	23 min
Jul 9, 4:58 AM CDT	Severe Thunderstorm Warning	MPX	Dakota, Scott	14 min
Jul 9, 5:18 AM CDT	Special Weather Statement	MPX	Rice	27 min
Jul 9, 5:20 AM CDT	Special Weather Statement	MPX	Washington	25 min
Jul 9, 5:38 AM CDT	Severe Thunderstorm Warning	MPX	Dakota, Washington	24 min
Jul 9, 7:44 AM CDT	Special Weather Statement	MPX	Steele	16 min
Jul 9, 9:55 AM CDT	Special Weather Statement	MPX	Steele	35 min
Jul 9, 11:45 AM CDT	Special Weather Statement	MPX	Freeborn	30 min

Nearby

Severe Thunderstorm Warnings in Minnesota, 2020 Every 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.