Alert archive / Minnesota / Severe Thunderstorm Warnings in 2013

Severe Thunderstorm Warning 20, NWS Twin Cities, MN

May 31, 2013Anoka County, Ramsey County, Washington County, Minnesota

NWS Twin Cities, MN issued this severe thunderstorm warning at May 31, 2013, 2:10 PM CDT for Anoka County, Ramsey County, Washington County, Minnesota. It was in force for 35 min. 6 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 31, 2013, 2:10 PM CDT (19:10 UTC)
Expired: May 31, 2013, 2:45 PM CDT
In force: 35 min
Issued by: NWS Twin Cities, MN
Area: Storm-based polygon
Hail: 1.0 in
Wind: 60.0 mph

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

The radar

The Minneapolis radar (KMPX), 50 km from the middle of the area, began a volume at 19:13 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 31, 2:10 PM CDT	HAIL 1	Arden Hills, MN	QUARTER SIZED HAIL COVERING THE GROUND.
May 31, 2:10 PM CDT	HAIL 1.25	Roseville, MN
May 31, 2:14 PM CDT	HAIL 1	Shoreview, MN	NICKEL TO QUARTER SIZED HAIL
May 31, 2:15 PM CDT	HAIL 0.75	2 Wnw Vadnais Heights, MN	DIME SIZED HAIL. TIME ESTIMATED. REPORT FROM NOAA SHAVE PROJECT.
May 31, 2:15 PM CDT	HAIL 0.88	1 S Shoreview, MN	0.9 INCH HAIL. TIME ESTIMATED. FROM NOAA SHAVE PROJECT.
May 31, 2:15 PM CDT	HAIL 1	1 Nne Shoreview, MN	TIME ESTIMATED. FROM NOAA SHAVE PROJECT.

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, 7.2 hours before the alert went out and 52 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: 60 J/kg
Mixed-layer CIN: -221 J/kg
Mixed-layer LCL: 1191 m above ground
0-6 km bulk shear: 22 kt
0-1 km storm-relative helicity: 256 m²/s²
0-3 km storm-relative helicity: 269 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.1

Open this sounding in Storm Lab

The text

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

294 
WUUS53 KMPX 311910
SVRMPX
MNC003-123-163-311945-
/O.NEW.KMPX.SV.W.0020.130531T1910Z-130531T1945Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE TWIN CITIES/CHANHASSEN MN
210 PM CDT FRI MAY 31 2013

THE NATIONAL WEATHER SERVICE IN THE TWIN CITIES HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  SOUTHEASTERN ANOKA COUNTY IN EAST CENTRAL MINNESOTA...
  NORTHERN RAMSEY COUNTY IN EAST CENTRAL MINNESOTA...
  NORTHWESTERN WASHINGTON COUNTY IN EAST CENTRAL MINNESOTA...

* UNTIL 245 PM CDT

* AT 209 PM CDT...A SEVERE THUNDERSTORM WAS LOCATED NEAR ROSEVILLE...
  AND MOVING NORTH AT 30 MPH.

  HAZARD...QUARTER SIZE HAIL AND 60 MPH WIND GUSTS.

  SOURCE...RADAR INDICATED.

  IMPACT...HAIL DAMAGE TO VEHICLES AND CROPS IS EXPECTED. EXPECT WIND
           DAMAGE TO ROOFS...SIDING AND TREES.

* LOCATIONS IMPACTED INCLUDE...
  VADNAIS HEIGHTS...SHOREVIEW...NORTH OAKS...CIRCLE PINES...
  LEXINGTON...LINO LAKES AND CENTERVILLE.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

LAT...LON 4528 9317 4525 9295 4501 9307 4502 9321
TIME...MOT...LOC 1911Z 197DEG 27KT 4506 9314

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

$$

CLF

3 follow-up statements

032 
WWUS53 KMPX 311916
SVSMPX

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE TWIN CITIES/CHANHASSEN MN
216 PM CDT FRI MAY 31 2013

MNC003-123-163-311945-
/O.CON.KMPX.SV.W.0020.000000T0000Z-130531T1945Z/
ANOKA MN-RAMSEY MN-WASHINGTON MN-
216 PM CDT FRI MAY 31 2013

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT FOR NORTHWESTERN
WASHINGTON...NORTH CENTRAL RAMSEY AND SOUTHEASTERN ANOKA COUNTIES
UNTIL 245 PM CDT...

AT 213 PM CDT...A SEVERE THUNDERSTORM WAS LOCATED NEAR ROSEVILLE...
AND MOVING NORTH AT 30 MPH.

HAZARD...HALF DOLLAR SIZE HAIL AND 60 MPH WIND GUSTS.

SOURCE...TRAINED WEATHER SPOTTERS. HALF DOLLAR HAIL WAS REPORTED IN  
         ROSEVILLE.

IMPACT...HAIL DAMAGE TO VEHICLES AND CROPS IS EXPECTED. EXPECT WIND
         DAMAGE TO ROOFS...SIDING AND TREES.

LOCATIONS IMPACTED INCLUDE...
NORTH OAKS...CIRCLE PINES...LEXINGTON...LINO LAKES AND CENTERVILLE.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

LAT...LON 4528 9317 4525 9295 4505 9306 4506 9319
TIME...MOT...LOC 1916Z 197DEG 27KT 4510 9312

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

$$

CLF

158 
WWUS53 KMPX 311926
SVSMPX

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE TWIN CITIES/CHANHASSEN MN
226 PM CDT FRI MAY 31 2013

MNC123-311935-
/O.CAN.KMPX.SV.W.0020.000000T0000Z-130531T1945Z/
RAMSEY MN-
226 PM CDT FRI MAY 31 2013

...THE SEVERE THUNDERSTORM WARNING FOR NORTH CENTRAL RAMSEY COUNTY IS
CANCELLED...

THE STORM WHICH PROMPTED THE WARNING HAS MOVED OUT OF THE WARNED 
AREA.

LAT...LON 4525 9295 4512 9302 4512 9305 4513 9313
      4527 9309
TIME...MOT...LOC 1925Z 197DEG 27KT 4516 9309

$$

MNC003-163-311945-
/O.CON.KMPX.SV.W.0020.000000T0000Z-130531T1945Z/
ANOKA MN-WASHINGTON MN-
226 PM CDT FRI MAY 31 2013

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT FOR NORTHWESTERN
WASHINGTON AND SOUTHEASTERN ANOKA COUNTIES UNTIL 245 PM CDT...

AT 223 PM CDT...A SEVERE THUNDERSTORM WAS LOCATED 5 MILES EAST OF
BLAINE...AND MOVING NORTH AT 30 MPH.

HAZARD...QUARTER SIZE HAIL.

SOURCE...TRAINED WEATHER SPOTTERS.

IMPACT...DAMAGE TO VEHICLES AND CROPS IS EXPECTED.

LOCATIONS IMPACTED INCLUDE...
CENTERVILLE.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

LAT...LON 4525 9295 4512 9302 4512 9305 4513 9313
      4527 9309
TIME...MOT...LOC 1925Z 197DEG 27KT 4516 9309

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

$$

CLF

653 
WWUS53 KMPX 311939
SVSMPX

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE TWIN CITIES/CHANHASSEN MN
239 PM CDT FRI MAY 31 2013

MNC003-163-311949-
/O.EXP.KMPX.SV.W.0020.000000T0000Z-130531T1945Z/
ANOKA MN-WASHINGTON MN-
239 PM CDT FRI MAY 31 2013

...THE SEVERE THUNDERSTORM WARNING FOR NORTHWESTERN WASHINGTON AND
SOUTHEASTERN ANOKA COUNTIES WILL EXPIRE AT 245 PM CDT...

THE STORM WHICH PROMPTED THE WARNING HAS WEAKENED AND MOVED OUT OF
THE WARNED AREA.

ADDITIONAL STRONG THUNDERSTORMS ARE STILL POSSIBLE...AND A SEVERE 
THUNDERSTORM WATCH REMAINS IN EFFECT UNTIL 10 PM CDT.

LAT...LON 4525 9295 4512 9302 4512 9305 4513 9313
      4527 9309
TIME...MOT...LOC 1939Z 197DEG 27KT 4526 9305

$$

SPD

The office that day

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

Issued	Product	Office	Counties	Lasted
May 30, 11:45 PM CDT	Special Weather Statement	MPX	Brown, Watonwan	60 min
May 31, 2:06 PM CDT	Special Weather Statement	MPX	Chisago, Ramsey	39 min
May 31, 2:38 PM CDT	Special Weather Statement	MPX	Chisago	52 min
May 31, 2:52 PM CDT	Special Weather Statement	MPX	Ramsey	23 min
May 31, 3:13 PM CDT	Special Weather Statement	MPX	Ramsey	32 min
May 31, 6:19 PM CDT	Special Weather Statement	MPX	Waseca	26 min
May 31, 6:36 PM CDT	Special Weather Statement	MPX	Dakota	24 min

Nearby

Severe Thunderstorm Warnings in Minnesota, 2013 Every severe thunderstorm warning in 2013

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.