Alert archive / Minnesota / Severe Thunderstorm Warnings in 2017

Severe Thunderstorm Warning 21, NWS Twin Cities, MN

May 15, 2017Blue Earth County, Waseca County, Minnesota

NWS Twin Cities, MN issued this severe thunderstorm warning at May 15, 2017, 9:55 PM CDT for Blue Earth County, Waseca County, Minnesota. It was in force for 35 min. 1 report 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 15, 2017, 9:55 PM CDT (02:55 UTC)
Expired: May 15, 2017, 10:30 PM CDT
In force: 35 min
Issued by: NWS Twin Cities, MN
Area: Storm-based polygon
Hail: 1.0 in
Wind: 50.0 mph

Counties Blue Earth County, MN, Waseca County, MN

The radar

The Minneapolis radar (KMPX), 106 km from the middle of the area, began a volume at 02:57 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 15, 10:13 PM CDT	HAIL 0.75	3 S Pemberton, 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.

Issued	Product	Office	Lasted
May 15, 9:48 PM CDT	Severe Thunderstorm Watch	SPC	5 hr

The nearest sounding before it

Minneapolis, MN (KMPX), launched 00:00Z, 2.9 hours before the alert went out and 106 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: 0 J/kg
Mixed-layer CIN: No buoyant parcel
Mixed-layer LCL: 1282 m above ground
0-6 km bulk shear: 46 kt
0-1 km storm-relative helicity: 21 m²/s²
0-3 km storm-relative helicity: 111 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

Open this sounding in Storm Lab

The text

As transmitted.

424 
WUUS53 KMPX 160255
SVRMPX
MNC013-161-160330-
/O.NEW.KMPX.SV.W.0021.170516T0255Z-170516T0330Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service Twin Cities/Chanhassen MN
955 PM CDT MON MAY 15 2017

The National Weather Service in The Twin Cities has issued a

* Severe Thunderstorm Warning for...
  Southeastern Blue Earth County in south central Minnesota...
  Southwestern Waseca County in south central Minnesota...

* Until 1030 PM CDT

* At 955 PM CDT, a severe thunderstorm was located near Mapleton, or
  19 miles south of Mankato, moving northeast at 45 mph.

  HAZARD...Quarter size hail. 

  SOURCE...Radar indicated. 

  IMPACT...Damage to vehicles is expected. 

* This severe thunderstorm will be near,
  Mapleton around 1000 PM CDT. 
  Pemberton and Waldorf around 1015 PM CDT. 
  Janesville around 1025 PM CDT. 

Other locations impacted by this severe thunderstorm include Alma
City.

This includes the following highways...
 U.S. Highway 14 between mile markers 146 and 147.
 U.S. Highway 169 near mile marker 27.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

LAT...LON 4386 9419 4413 9373 4394 9357 4384 9391
TIME...MOT...LOC 0255Z 240DEG 38KT 4388 9400 

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

BORGHOFF

2 follow-up statements

156 
WWUS53 KMPX 160306
SVSMPX

Severe Weather Statement
National Weather Service Twin Cities/Chanhassen MN
1006 PM CDT MON MAY 15 2017

MNC013-161-160330-
/O.CON.KMPX.SV.W.0021.000000T0000Z-170516T0330Z/
Blue Earth MN-Waseca MN-
1006 PM CDT MON MAY 15 2017

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 1030 PM CDT
FOR SOUTHEASTERN BLUE EARTH AND SOUTHWESTERN WASECA COUNTIES...

At 1006 PM CDT, a severe thunderstorm was located near Mapleton, or
17 miles southeast of Mankato, moving northeast at 45 mph.

HAZARD...Half dollar size hail. 

SOURCE...Radar indicated. 

IMPACT...Damage to vehicles is expected. 

This severe storm will be near...
  Pemberton and Waldorf around 1015 PM CDT. 
  Janesville around 1025 PM CDT. 

Other locations impacted by this severe thunderstorm include Alma
City.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

LAT...LON 4393 9403 4413 9373 4394 9357 4384 9392
      4385 9393
TIME...MOT...LOC 0306Z 240DEG 38KT 4394 9385 

HAIL...1.25IN
WIND...<50MPH
 
$$

BORGHOFF

074 
WWUS53 KMPX 160321
SVSMPX

Severe Weather Statement
National Weather Service Twin Cities/Chanhassen MN
1021 PM CDT MON MAY 15 2017

MNC013-160331-
/O.CAN.KMPX.SV.W.0021.000000T0000Z-170516T0330Z/
Blue Earth MN-
1021 PM CDT MON MAY 15 2017

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

A severe thunderstorm watch remains in effect until 300 AM CDT for
south central Minnesota.

LAT...LON 4405 9377 4406 9367 4394 9357 4390 9377
TIME...MOT...LOC 0321Z 248DEG 24KT 4399 9368 

$$

MNC161-160330-
/O.CON.KMPX.SV.W.0021.000000T0000Z-170516T0330Z/
Waseca MN-
1021 PM CDT MON MAY 15 2017

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 1030 PM CDT
FOR SOUTHWESTERN WASECA COUNTY...

At 1021 PM CDT, a severe thunderstorm was located near Alma City, or
19 miles southeast of Mankato, moving east at 30 mph.

HAZARD...Quarter size hail. 

SOURCE...Radar indicated. 

IMPACT...Damage to vehicles is expected. 

this severe thunderstorm will remain over mainly rural areas of
southwestern Waseca County, including the following locations: Alma
City.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

LAT...LON 4405 9377 4406 9367 4394 9357 4390 9377
TIME...MOT...LOC 0321Z 248DEG 24KT 4399 9368 

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

BORGHOFF

The office that day

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

Issued	Product	Office	Counties	Lasted
May 15, 8:53 PM CDT	Special Weather Statement	MPX	Faribault	37 min
May 15, 9:32 PM CDT	Severe Thunderstorm Warning	MPX	Waseca	43 min
May 15, 10:04 PM CDT	Severe Thunderstorm Warning	MPX	Steele	56 min
May 15, 10:25 PM CDT	Severe Thunderstorm Warning	MPX	Goodhue	26 min
May 15, 11:11 PM CDT	Special Weather Statement	MPX	Waseca	34 min
May 15, 11:39 PM CDT	Special Weather Statement	MPX	Rice	36 min
May 16, 1:18 AM CDT	Special Weather Statement	MPX	Rice	42 min
May 16, 3:05 AM CDT	Special Weather Statement	MPX	Lac qui Parle, Yellow Medicine	55 min
May 16, 3:47 AM CDT	Special Weather Statement	MPX	Chippewa, Kandiyohi, Stevens, Swift	28 min
May 16, 4:20 AM CDT	Special Weather Statement	MPX	Kandiyohi, Stearns	55 min
May 16, 5:06 AM CDT	Special Weather Statement	MPX	Brown, Martin, Redwood, Watonwan	84 min
May 16, 2:54 PM CDT	Flash Flood Watch	MPX	Faribault, Freeborn, Goodhue, Rice, Steele, Waseca	12 hr
May 16, 3:04 PM CDT	Special Weather Statement	MPX	Rice	26 min
May 16, 3:27 PM CDT	Severe Thunderstorm Warning	MPX	Dakota, Goodhue, Rice	48 min
May 16, 4:06 PM CDT	Severe Thunderstorm Warning	MPX	Dakota, Washington	39 min
May 16, 4:38 PM CDT	Severe Thunderstorm Warning	MPX	Washington	52 min
May 16, 5:32 PM CDT	Severe Thunderstorm Warning	MPX	Dakota, Goodhue, Rice	43 min
May 16, 5:42 PM CDT	Severe Thunderstorm Warning	MPX	Rice	33 min
May 16, 6:16 PM CDT	Severe Thunderstorm Warning	MPX	Dakota, Goodhue	44 min
May 16, 6:58 PM CDT	Severe Thunderstorm Warning	MPX	Goodhue	47 min

Nearby

Severe Thunderstorm Warnings in Minnesota, 2017 Every severe thunderstorm warning in 2017

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.