Alert archive / Minnesota / Severe Thunderstorm Warnings in 2015

Severe Thunderstorm Warning 128, NWS Twin Cities, MN

August 22, 20154 counties in Minnesota

NWS Twin Cities, MN issued this severe thunderstorm warning at Aug 22, 2015, 5:11 PM CDT for 4 counties in Minnesota. It was in force for 34 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: Aug 22, 2015, 5:11 PM CDT (22:11 UTC)
Expired: Aug 22, 2015, 5:45 PM CDT
In force: 34 min
Issued by: NWS Twin Cities, MN
Area: Storm-based polygon
Hail: 1.0 in
Wind: 50.0 mph

Counties Benton County, MN, Kanabec County, MN, Mille Lacs County, MN, Morrison County, MN

The radar

The Minneapolis radar (KMPX), 111 km from the middle of the area, began a volume at 22:14 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.

Issued	Product	Office	Lasted
Aug 22, 2:35 PM CDT	Tornado Watch	SPC	7 hr

The nearest sounding before it

Minneapolis, MN (KMPX), launched 12:00Z, 10.2 hours before the alert went out and 111 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: 445 J/kg
Mixed-layer CIN: -348 J/kg
Mixed-layer LCL: 1017 m above ground
0-6 km bulk shear: 17 kt
0-1 km storm-relative helicity: -7 m²/s²
0-3 km storm-relative helicity: 65 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

Open this sounding in Storm Lab

The text

As transmitted, in the capitals the NWS used until 2016.

761 
WUUS53 KMPX 222211
SVRMPX
MNC009-065-095-097-222245-
/O.NEW.KMPX.SV.W.0128.150822T2211Z-150822T2245Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE TWIN CITIES/CHANHASSEN MN
511 PM CDT SAT AUG 22 2015

THE NATIONAL WEATHER SERVICE IN THE TWIN CITIES HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  NORTHERN MILLE LACS COUNTY IN EAST CENTRAL MINNESOTA...
  SOUTHEASTERN MORRISON COUNTY IN CENTRAL MINNESOTA...
  WEST CENTRAL KANABEC COUNTY IN EAST CENTRAL MINNESOTA...
  NORTHEASTERN BENTON COUNTY IN CENTRAL MINNESOTA...

* UNTIL 545 PM CDT

* AT 510 PM CDT...A SEVERE THUNDERSTORM WAS LOCATED NEAR GRANITE
  LEDGE...OR 21 MILES NORTHEAST OF ST. CLOUD...MOVING NORTHEAST AT 55
  MPH.

  HAZARD...QUARTER SIZE HAIL. 

  SOURCE...RADAR INDICATED. 

  IMPACT...DAMAGE TO VEHICLES IS EXPECTED. 

* THIS SEVERE THUNDERSTORM WILL BE NEAR...
  MILACA AROUND 515 PM CDT.
  ONAMIA AROUND 535 PM CDT.

OTHER LOCATIONS IMPACTED BY THIS SEVERE THUNDERSTORM INCLUDE OAK
PARK...GRANITE LEDGE...RUM RIVER AND GILMAN.

THIS INCLUDES U.S. HIGHWAY 169 BETWEEN MILE MARKERS 193 AND 215.
 
PRECAUTIONARY/PREPAREDNESS ACTIONS...

FOR YOUR PROTECTION MOVE TO AN INTERIOR ROOM ON THE LOWEST FLOOR OF A
BUILDING.

&&

A TORNADO WATCH REMAINS IN EFFECT UNTIL 1100 PM CDT FOR EAST CENTRAL
MINNESOTA.

LAT...LON 4566 9380 4576 9398 4616 9378 4597 9334
TIME...MOT...LOC 2210Z 217DEG 48KT 4576 9383 

HAIL...1.00IN
WIND...<50MPH
 
$$

CLF

2 follow-up statements

257 
WWUS53 KMPX 222227
SVSMPX

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE TWIN CITIES/CHANHASSEN MN
527 PM CDT SAT AUG 22 2015

MNC009-097-222236-
/O.CAN.KMPX.SV.W.0128.000000T0000Z-150822T2245Z/
MORRISON MN-BENTON MN-
527 PM CDT SAT AUG 22 2015

...THE SEVERE THUNDERSTORM WARNING FOR SOUTHEASTERN MORRISON AND
NORTHEASTERN BENTON COUNTIES IS CANCELLED...
    
THE SEVERE THUNDERSTORM WHICH PROMPTED THE WARNING HAS MOVED OUT OF 
THE WARNED AREA. THEREFORE THE WARNING HAS BEEN CANCELLED.

A TORNADO WATCH REMAINS IN EFFECT UNTIL 1100 PM CDT FOR EAST CENTRAL
MINNESOTA.

LAT...LON 4583 9358 4587 9375 4616 9378 4597 9334
TIME...MOT...LOC 2226Z 217DEG 48KT 4594 9364 

$$

MNC065-095-222245-
/O.CON.KMPX.SV.W.0128.000000T0000Z-150822T2245Z/
MILLE LACS MN-KANABEC MN-
527 PM CDT SAT AUG 22 2015

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 545 PM CDT
FOR NORTHERN MILLE LACS AND WEST CENTRAL KANABEC COUNTIES...

AT 526 PM CDT...A SEVERE THUNDERSTORM WAS LOCATED 9 MILES SOUTH OF
ONAMIA...OR 33 MILES NORTHWEST OF CAMBRIDGE...MOVING NORTHEAST AT 55
MPH.

HAZARD...QUARTER SIZE HAIL. 

SOURCE...RADAR INDICATED. 

IMPACT...DAMAGE TO VEHICLES IS EXPECTED. 

THIS SEVERE STORM WILL BE NEAR...
  ONAMIA AROUND 535 PM CDT.

THIS INCLUDES U.S. HIGHWAY 169 BETWEEN MILE MARKERS 199 AND 215.
 
PRECAUTIONARY/PREPAREDNESS ACTIONS...

FOR YOUR PROTECTION MOVE TO AN INTERIOR ROOM ON THE LOWEST FLOOR OF A
BUILDING.

&&

A TORNADO WATCH REMAINS IN EFFECT UNTIL 1100 PM CDT FOR EAST CENTRAL
MINNESOTA.

LAT...LON 4583 9358 4587 9375 4616 9378 4597 9334
TIME...MOT...LOC 2226Z 217DEG 48KT 4594 9364 

HAIL...1.00IN
WIND...<50MPH
 
$$

CLF

508 
WWUS53 KMPX 222235
SVSMPX

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE TWIN CITIES/CHANHASSEN MN
535 PM CDT SAT AUG 22 2015

MNC065-095-222245-
/O.EXP.KMPX.SV.W.0128.000000T0000Z-150822T2245Z/
MILLE LACS MN-KANABEC MN-
535 PM CDT SAT AUG 22 2015

...THE SEVERE THUNDERSTORM WARNING FOR NORTHERN MILLE LACS AND WEST
CENTRAL KANABEC COUNTIES WILL EXPIRE AT 545 PM CDT...
                
THE STORM WHICH PROMPTED THE WARNING HAS WEAKENED BELOW SEVERE
LIMITS...AND NO LONGER POSE AN IMMEDIATE THREAT TO LIFE OR PROPERTY.
THEREFORE THE WARNING WILL BE ALLOWED TO EXPIRE.

A TORNADO WATCH REMAINS IN EFFECT UNTIL 1100 PM CDT FOR EAST CENTRAL
MINNESOTA.

LAT...LON 4583 9358 4587 9375 4616 9378 4597 9334
TIME...MOT...LOC 2232Z 217DEG 48KT 4594 9364 

$$

CLF

The office that day

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

Issued	Product	Office	Counties	Lasted
Aug 22, 4:59 PM CDT	Special Weather Statement	MPX	Benton	46 min
Aug 22, 5:18 PM CDT	Special Weather Statement	MPX	Mille Lacs	27 min
Aug 22, 5:56 PM CDT	Special Weather Statement	MPX	Anoka	19 min
Aug 22, 6:01 PM CDT	Special Weather Statement	MPX	Waseca	29 min

Nearby

Severe Thunderstorm Warnings in Minnesota, 2015 Every severe thunderstorm warning in 2015

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.