Alert archive / Minnesota / Severe Thunderstorm Warnings in 2018

Severe Thunderstorm Warning 20, NWS Twin Cities, MN

May 25, 2018Hennepin County, Wright County, Minnesota

NWS Twin Cities, MN issued this severe thunderstorm warning at May 25, 2018, 4:32 PM CDT for Hennepin County, Wright County, Minnesota. It was in force for 43 min. 3 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: May 25, 2018, 4:32 PM CDT (21:32 UTC)
Expired: May 25, 2018, 5:15 PM CDT
In force: 43 min
Issued by: NWS Twin Cities, MN
Area: Storm-based polygon
Hail: 1.25 in
Wind: 60.0 mph

Counties Hennepin County, MN, Wright County, MN

The radar

The Minneapolis radar (KMPX), 41 km from the middle of the area, began a volume at 21:33 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

Time	Report	Where	Remark
May 25, 4:45 PM CDT	HAIL 1	2 Sse Rogers, MN
May 25, 4:45 PM CDT	HAIL 1	Fletcher, MN	CORRECTS PREVIOUS HAIL REPORT FROM ST. MICHAEL.
May 25, 4:45 PM CDT	HAIL 1	St. Michael, MN

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 12:00Z, 9.5 hours before the alert went out and 40 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: 543 J/kg
Mixed-layer CIN: -136 J/kg
Mixed-layer LCL: 1022 m above ground
0-6 km bulk shear: 33 kt
0-1 km storm-relative helicity: 245 m²/s²
0-3 km storm-relative helicity: 234 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 1.1

Open this sounding in Storm Lab

The text

As transmitted.

725 
WUUS53 KMPX 252132
SVRMPX
MNC053-171-252215-
/O.NEW.KMPX.SV.W.0020.180525T2132Z-180525T2215Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service Twin Cities/Chanhassen MN
432 PM CDT FRI MAY 25 2018

The National Weather Service in The Twin Cities has issued a

* Severe Thunderstorm Warning for...
  Central Wright County in central Minnesota...
  Northwestern Hennepin County in east central Minnesota...

* Until 515 PM CDT

* At 431 PM CDT, a severe thunderstorm was located over Buffalo,
  moving east at 30 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. 

* This severe thunderstorm will be near,
  Albertville and Rockford around 450 PM CDT. 
  St. Michael, Otsego, Rogers, Medina and Independence around 500 PM 
  CDT. 
  Maple Grove and Corcoran around 505 PM CDT. 

This includes the following highways...
 Interstate 94 in Minnesota between mile markers 193 and 205.
 U.S. Highway 12 near mile marker 137.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

LAT...LON 4527 9355 4521 9342 4498 9362 4517 9407
      4532 9392
TIME...MOT...LOC 2131Z 285DEG 26KT 4521 9386 

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

BORGHOFF

3 follow-up statements

813 
WWUS53 KMPX 252144
SVSMPX

Severe Weather Statement
National Weather Service Twin Cities/Chanhassen MN
444 PM CDT FRI MAY 25 2018

MNC053-171-252215-
/O.CON.KMPX.SV.W.0020.000000T0000Z-180525T2215Z/
Wright MN-Hennepin MN-
444 PM CDT FRI MAY 25 2018

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 515 PM CDT
FOR SOUTHEASTERN WRIGHT AND NORTHWESTERN HENNEPIN COUNTIES...

At 444 PM CDT, a severe thunderstorm was located over St. Michael, or
8 miles east of Buffalo, moving east at 35 mph.

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

SOURCE...Trained weather spotters. 

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

This severe storm will be near...
  Rogers around 455 PM CDT. 
  Maple Grove and Corcoran around 500 PM CDT. 

Other locations impacted by this severe thunderstorm include Loretto,
Hanover, Greenfield, Buffalo Airport, Dayton and Hamel.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

LAT...LON 4527 9355 4521 9342 4498 9362 4518 9393
      4530 9380
TIME...MOT...LOC 2144Z 280DEG 29KT 4520 9369 

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

BORGHOFF

183 
WWUS53 KMPX 252156
SVSMPX

Severe Weather Statement
National Weather Service Twin Cities/Chanhassen MN
456 PM CDT FRI MAY 25 2018

MNC171-252206-
/O.CAN.KMPX.SV.W.0020.000000T0000Z-180525T2215Z/
Wright MN-
456 PM CDT FRI MAY 25 2018

...THE SEVERE THUNDERSTORM WARNING FOR SOUTHEASTERN WRIGHT COUNTY IS
CANCELLED...
    
The severe thunderstorm which prompted the warning has moved out of 
the warned area. Therefore, the warning has been cancelled.

LAT...LON 4523 9349 4521 9342 4498 9362 4510 9373
      4516 9367 4516 9364 4521 9361 4521 9360
      4523 9356 4522 9353 4524 9350
TIME...MOT...LOC 2156Z 283DEG 19KT 4518 9355 

$$

MNC053-252215-
/O.CON.KMPX.SV.W.0020.000000T0000Z-180525T2215Z/
Hennepin MN-
456 PM CDT FRI MAY 25 2018

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 515 PM CDT
FOR NORTHWESTERN HENNEPIN COUNTY...

At 456 PM CDT, a severe thunderstorm was located over Rogers, or 15
miles east of Buffalo, moving east at 20 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. 

This severe storm will be near...
  Maple Grove around 500 PM CDT. 

Other locations impacted by this severe thunderstorm include Loretto,
Hanover, Greenfield, Dayton and Hamel.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

LAT...LON 4523 9349 4521 9342 4498 9362 4510 9373
      4516 9367 4516 9364 4521 9361 4521 9360
      4523 9356 4522 9353 4524 9350
TIME...MOT...LOC 2156Z 283DEG 19KT 4518 9355 

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

BORGHOFF

443 
WWUS53 KMPX 252207
SVSMPX

Severe Weather Statement
National Weather Service Twin Cities/Chanhassen MN
507 PM CDT FRI MAY 25 2018

MNC053-252216-
/O.EXP.KMPX.SV.W.0020.000000T0000Z-180525T2215Z/
Hennepin MN-
507 PM CDT FRI MAY 25 2018

...THE SEVERE THUNDERSTORM WARNING FOR NORTHWESTERN HENNEPIN COUNTY
WILL EXPIRE AT 515 PM 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 gusty winds
are still possible with this thunderstorm.

LAT...LON 4523 9349 4521 9342 4498 9362 4510 9373
      4516 9367 4516 9364 4521 9361 4521 9360
      4523 9356 4522 9353 4524 9350
TIME...MOT...LOC 2206Z 285DEG 26KT 4516 9345 

$$

BORGHOFF

The office that day

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

Issued	Product	Office	Counties	Lasted
May 24, 7:06 PM CDT	Special Weather Statement	MPX	Pope	39 min
May 24, 7:10 PM CDT	Severe Thunderstorm Warning	MPX	Anoka, Dakota, Hennepin, Ramsey, Scott	50 min
May 24, 7:27 PM CDT	Severe Thunderstorm Warning	MPX	Pope, Stevens	33 min
May 24, 7:43 PM CDT	Severe Thunderstorm Warning	MPX	Dakota, Washington	47 min
May 24, 7:48 PM CDT	Severe Thunderstorm Warning	MPX	Rice	42 min
May 24, 8:31 PM CDT	Special Weather Statement	MPX	Goodhue	29 min
May 24, 8:33 PM CDT	Severe Thunderstorm Warning	MPX	Douglas, Pope, Stearns, Todd	33 min
May 24, 9:03 PM CDT	Severe Thunderstorm Warning	MPX	Dakota, Goodhue	28 min
May 25, 1:15 AM CDT	Special Weather Statement	MPX	Sibley	30 min
May 25, 2:06 AM CDT	Special Weather Statement	MPX	Hennepin	24 min
May 25, 2:13 AM CDT	Special Weather Statement	MPX	Sibley	32 min
May 25, 7:07 AM CDT	Special Weather Statement	MPX	Goodhue	23 min
May 25, 1:53 PM CDT	Severe Thunderstorm Warning	MPX	Pope	37 min
May 25, 2:55 PM CDT	Severe Thunderstorm Warning	MPX	Freeborn	50 min
May 25, 3:12 PM CDT	Severe Thunderstorm Warning	MPX	Freeborn	48 min
May 25, 3:33 PM CDT	Special Weather Statement	MPX	Steele	42 min
May 25, 3:38 PM CDT	Special Weather Statement	MPX	Freeborn	37 min
May 25, 3:47 PM CDT	Special Weather Statement	MPX	Lac qui Parle	28 min
May 25, 4:03 PM CDT	Special Weather Statement	MPX	Freeborn	42 min
May 25, 4:09 PM CDT	Special Weather Statement	MPX	Freeborn	36 min
May 25, 4:24 PM CDT	Severe Thunderstorm Warning	MPX	Faribault, Freeborn	36 min
May 25, 5:03 PM CDT	Severe Thunderstorm Warning	MPX	Washington	57 min
May 25, 5:17 PM CDT	Special Weather Statement	MPX	Ramsey, Washington	43 min
May 25, 5:35 PM CDT	Special Weather Statement	MPX	Scott	25 min

Nearby

Severe Thunderstorm Warnings in Minnesota, 2018 Every 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.