Alert archive / Minnesota / Severe Thunderstorm Warnings in 2012

Severe Thunderstorm Warning 82, NWS Grand Forks, ND

July 22, 2012Lake of the Woods County, Minnesota

NWS Grand Forks, ND issued this severe thunderstorm warning at Jul 22, 2012, 12:19 PM CDT for Lake of the Woods County, Minnesota. It was in force for 41 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
Jul 22, 2012, 12:19 PM CDT (17:19 UTC)
Expired
Jul 22, 2012, 1:00 PM CDT
In force
41 min
Issued by
NWS Grand Forks, ND
Area
Storm-based polygon
Hail
1.0 in
Wind
60.0 mph

County Lake of the Woods County, MN

The nearest sounding before it

International Fa, MN (KINL), launched 12:00Z, 5.3 hours before the alert went out and 133 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-pSkew-T log-p diagram, International Fa, MN at 12:00Z on 2012-07-22Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 0 joules per kilogram.LCLLFCEL10008507005003002001001 km2 km3 km6 km9 km12 km15 km-30°-20°-10°0°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, International Fa, MN at 12:00Z on 2012-07-22The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 76 square meters per square second.19395878Sfc1 km3 km6 km9 kmRMLM
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
1489 m above ground
0-6 km bulk shear
38 kt
0-1 km storm-relative helicity
76 m²/s²
0-3 km storm-relative helicity
93 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.

556 
WUUS53 KFGF 221719
SVRFGF
MNC077-221800-
/O.NEW.KFGF.SV.W.0082.120722T1719Z-120722T1800Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE EASTERN ND/GRAND FORKS ND
1219 PM CDT SUN JUL 22 2012

THE NATIONAL WEATHER SERVICE IN GRAND FORKS HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  NORTH CENTRAL LAKE OF THE WOODS COUNTY IN NORTH CENTRAL
  MINNESOTA...

* UNTIL 100 PM CDT

* AT 1215 PM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
  SEVERE THUNDERSTORM CAPABLE OF PRODUCING QUARTER SIZE HAIL...AND
  DAMAGING WINDS IN EXCESS OF 60 MPH. THE STORM WAS LOCATED 16 MILES
  SOUTHWEST OF ANGLE INLET...OR 31 MILES NORTHEAST OF ROSEAU...MOVING
  TO THE EAST AT 30 MPH.

* THE SEVERE THUNDERSTORM WILL AFFECT MAINLY RURAL AREAS OF NORTH
  CENTRAL LAKE OF THE WOODS COUNTY.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

REMEMBER SEVERE THUNDERSTORMS CAN AND OCCASIONALLY DO PRODUCE
TORNADOES WITH LITTLE OR NO ADVANCE WARNING.

&&

LAT...LON 4921 9478 4914 9477 4910 9474 4907 9474
      4908 9517 4928 9515 4929 9482
TIME...MOT...LOC 1719Z 269DEG 27KT 4918 9526
WIND...HAIL 60MPH 1.00IN

$$

HOPPES
2 follow-up statements
659 
WWUS53 KFGF 221739
SVSFGF

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE EASTERN ND/GRAND FORKS ND
1239 PM CDT SUN JUL 22 2012

MNC077-221800-
/O.CON.KFGF.SV.W.0082.000000T0000Z-120722T1800Z/
LAKE OF THE WOODS MN-
1239 PM CDT SUN JUL 22 2012

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT FOR NORTH CENTRAL
LAKE OF THE WOODS COUNTY IN NORTH CENTRAL MINNESOTA UNTIL 100 PM
CDT...

AT 1236 PM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
SEVERE THUNDERSTORM CAPABLE OF PRODUCING QUARTER SIZE HAIL...AND
DAMAGING WINDS IN EXCESS OF 60 MPH.  THE STORM WAS LOCATED 12 MILES
NORTH OF ARNESEN...OR 34 MILES NORTHEAST OF ROSEAU...MOVING TO THE
EAST AT 30 MPH.

LOCATIONS IMPACTED INCLUDE...
  MAINLY RURAL AREAS OF NORTHERN LAKE OF THE WOODS.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

DURING THUNDERSTORMS YOU SHOULD MOVE INSIDE A STRONG BUILDING. DO NOT
STAND BY WINDOWS. DO NOT USE TELEPHONES OR ELECTRICAL APPLIANCES.

&&

LAT...LON 4921 9478 4914 9477 4910 9474 4907 9474
      4908 9517 4928 9515 4929 9482
TIME...MOT...LOC 1738Z 269DEG 27KT 4912 9508
WIND...HAIL 60MPH 1.00IN

$$

HOPPES
055 
WWUS53 KFGF 221801
SVSFGF

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE EASTERN ND/GRAND FORKS ND
101 PM CDT SUN JUL 22 2012

MNC077-221811-
/O.EXP.KFGF.SV.W.0082.000000T0000Z-120722T1800Z/
LAKE OF THE WOODS MN-
101 PM CDT SUN JUL 22 2012

...THE SEVERE THUNDERSTORM WARNING FOR NORTH CENTRAL LAKE OF THE
WOODS COUNTY IN NORTH CENTRAL MINNESOTA HAS EXPIRED...

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

LAT...LON 4921 9478 4914 9477 4910 9474 4907 9474
      4908 9517 4928 9515 4929 9482
TIME...MOT...LOC 1739Z 269DEG 27KT 4907 9510

$$

HOPPES

The office that day

Everything else NWS Grand Forks, ND issued on the same UTC day.

IssuedProductOfficeCountiesLasted
Jul 22, 1:23 PM CDTSpecial Weather StatementFGFLake of the Woods67 min
Jul 22, 1:44 PM CDTSevere Thunderstorm WarningFGFLake of the Woods46 min
Jul 22, 2:17 PM CDTSevere Thunderstorm WarningFGFLake of the Woods36 min
Jul 22, 6:42 PM CDTSevere Thunderstorm WarningFGFClay, Wilkin34 min

Nearby

Severe Thunderstorm Warnings in Minnesota, 2012Every severe thunderstorm warning in 2012

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.