Alert archive / Minnesota / Severe Thunderstorm Warnings in 2014

Severe Thunderstorm Warning 65, NWS Twin Cities, MN

July 7, 2014Martin County, Minnesota

NWS Twin Cities, MN issued this severe thunderstorm warning at Jul 7, 2014, 7:13 PM CDT for Martin County, Minnesota. It was in force for 20 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: Jul 7, 2014, 7:13 PM CDT (00:13 UTC)
Expired: Jul 7, 2014, 7:33 PM CDT
In force: 20 min
Issued by: NWS Twin Cities, MN
Area: Storm-based polygon
Hail: 1.5 in
Wind: 50.0 mph

County Martin County, MN

The radar

The Minneapolis radar (KMPX), 164 km from the middle of the area, began a volume at 00:16 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
Jul 7, 7:20 PM CDT	TSTM WND DMG	4 Ssw Fairmont, MN	3 TO 4 FOOT DIAMETER OAK TREE BLOWN OVER. ALSO REPORTED 100 ACRES OF CORN AND BEANS DESTROYED.
Jul 7, 7:20 PM CDT	HAIL 0.5	4 Ssw Fairmont, MN
Jul 7, 7:40 PM CDT	HAIL 0.5	1 Nne Ceylon, 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 00:00Z, 0.2 hours before the alert went out and 163 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: 2 J/kg
Mixed-layer CIN: -362 J/kg
Mixed-layer LCL: 1253 m above ground
0-6 km bulk shear: 51 kt
0-1 km storm-relative helicity: -121 m²/s²
0-3 km storm-relative helicity: 1 m²/s²
Significant tornado parameter: 0.0
Supercell composite: -0.4

Open this sounding in Storm Lab

The text

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

567 
WUUS53 KMPX 080013
SVRMPX
MNC091-080045-
/O.NEW.KMPX.SV.W.0065.140708T0013Z-140708T0045Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE TWIN CITIES/CHANHASSEN MN
713 PM CDT MON JUL 7 2014

THE NATIONAL WEATHER SERVICE IN THE TWIN CITIES HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  SOUTHERN MARTIN COUNTY IN SOUTH CENTRAL MINNESOTA...

* UNTIL 745 PM CDT

* AT 712 PM CDT...A SEVERE THUNDERSTORM WAS LOCATED 11 MILES
  SOUTHWEST OF FAIRMONT...AND MOVING SOUTHEAST AT 50 MPH.

  HAZARD...PING PONG BALL SIZE HAIL.

  SOURCE...RADAR INDICATED.

  IMPACT...PEOPLE AND ANIMALS OUTDOORS WILL BE INJURED. EXPECT DAMAGE
           TO ROOFS...SIDING...WINDOWS AND VEHICLES.

* LOCATIONS IMPACTED INCLUDE...
  CEYLON AND WILBERT.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

LAT...LON 4358 9476 4368 9469 4351 9425 4349 9425
      4349 9457
TIME...MOT...LOC 0013Z 297DEG 42KT 4358 9464

HAIL...1.50IN
WIND...<50MPH

$$

SPD

2 follow-up statements

488 
WWUS53 KMPX 080026
SVSMPX

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE TWIN CITIES/CHANHASSEN MN
726 PM CDT MON JUL 7 2014

MNC091-080045-
/O.CON.KMPX.SV.W.0065.000000T0000Z-140708T0045Z/
MARTIN MN-
726 PM CDT MON JUL 7 2014

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT FOR SOUTHEASTERN
MARTIN COUNTY UNTIL 745 PM CDT...

AT 725 PM CDT...A SEVERE THUNDERSTORM WAS LOCATED 9 MILES SOUTH OF
FAIRMONT...AND MOVING SOUTHEAST AT 50 MPH.

HAZARD...PING PONG BALL SIZE HAIL.

SOURCE...RADAR INDICATED.

IMPACT...PEOPLE AND ANIMALS OUTDOORS WILL BE INJURED. EXPECT DAMAGE
         TO ROOFS...SIDING...WINDOWS AND VEHICLES.

LOCATIONS IMPACTED INCLUDE...
  MAINLY RURAL AREAS OF SOUTHEASTERN MARTIN COUNTY.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

LAT...LON 4351 9448 4352 9456 4362 9453 4351 9425
      4349 9425
TIME...MOT...LOC 0026Z 297DEG 42KT 4351 9445

HAIL...1.50IN
WIND...<50MPH

$$

141 
WWUS53 KMPX 080033
SVSMPX

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE TWIN CITIES/CHANHASSEN MN
733 PM CDT MON JUL 7 2014

MNC091-080043-
/O.CAN.KMPX.SV.W.0065.000000T0000Z-140708T0045Z/
MARTIN MN-
733 PM CDT MON JUL 7 2014

...THE SEVERE THUNDERSTORM WARNING FOR SOUTHEASTERN MARTIN COUNTY IS
CANCELLED...

THE STORM WHICH PROMPTED THE WARNING HAS WEAKENED BELOW SEVERE
LIMITS...AND NO LONGER POSES AN IMMEDIATE THREAT TO LIFE OR PROPERTY.

LAT...LON 4351 9448 4352 9456 4362 9453 4351 9425
      4349 9425
TIME...MOT...LOC 0033Z 297DEG 42KT 4347 9435

$$

SPD

The office that day

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

Issued	Product	Office	Counties	Lasted
Jul 7, 7:00 PM CDT	Special Weather Statement	MPX	Steele, Waseca	45 min
Jul 7, 7:01 PM CDT	Special Weather Statement	MPX	Martin	29 min

Nearby

Severe Thunderstorm Warnings in Minnesota, 2014 Every severe thunderstorm warning in 2014

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.