Alert archive / North Dakota / Severe Thunderstorm Warnings in 2012

Severe Thunderstorm Warning 37, NWS Grand Forks, ND

June 21, 2012Pembina County, North Dakota; Kittson County, Minnesota

NWS Grand Forks, ND issued this severe thunderstorm warning at Jun 21, 2012, 4:23 PM CDT for Pembina County, North Dakota; Kittson County, Minnesota. It was in force for 42 min. 2 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: Jun 21, 2012, 4:23 PM CDT (21:23 UTC)
Expired: Jun 21, 2012, 5:05 PM CDT
In force: 42 min
Issued by: NWS Grand Forks, ND
Area: Storm-based polygon
Hail: 1.0 in
Wind: 60.0 mph

Counties Kittson County, MN, Pembina County, ND

The radar

The Fargo/Grand Forks radar (KMVX), 148 km from the middle of the area, began a volume at 21:25 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
Jun 21, 4:30 PM CDT	HAIL 1	6 Sw Pembina, ND	VERY STRONG WINDS ALSO REPORTED WITH SOME TREE BRANCHES DOWN IN YARD.
Jun 21, 4:55 PM CDT	TSTM WND GST 60	3 Nnw Mattson, MN	SEVERAL LARGE 4-6 INCH BRANCHES BROKEN DOWN IN FARM YARD. WIND REMAINED QUITE STRONG FOR ABOUT 10 MINUTES.

Local storm reports filed while the alert was in force, from inside its polygon or its counties.

The nearest sounding before it

International Fa, MN (KINL), launched 12:00Z, 9.4 hours before the alert went out and 289 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: 13 J/kg
Mixed-layer CIN: -14 J/kg
Mixed-layer LCL: 592 m above ground
0-6 km bulk shear: 36 kt
0-1 km storm-relative helicity: 23 m²/s²
0-3 km storm-relative helicity: 59 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.

708 
WUUS53 KFGF 212123
SVRFGF
MNC069-NDC067-212230-
/O.NEW.KFGF.SV.W.0037.120621T2123Z-120621T2230Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE EASTERN ND/GRAND FORKS ND
423 PM CDT THU JUN 21 2012

THE NATIONAL WEATHER SERVICE IN GRAND FORKS HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  NORTHWESTERN KITTSON COUNTY IN NORTHWEST MINNESOTA...
  NORTHEASTERN PEMBINA COUNTY IN NORTHEAST NORTH DAKOTA...

* UNTIL 530 PM CDT

* AT 420 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 4 MILES
  WEST OF PEMBINA...OR 38 MILES NORTH OF GRAFTON...MOVING TO THE
  SOUTHEAST AT 20 MPH.

* THE SEVERE THUNDERSTORM WILL BE NEAR...
  ST. VINCENT AROUND 430 PM CDT.
  HAMILTON AROUND 435 PM CDT.
  HUMBOLDT AROUND 445 PM CDT.
  JOLIETTE AND GLASSTON AROUND 450 PM CDT.

THEREAFTER SOME OTHER LOCATIONS IMPACTED BY THE SEVERE THUNDERSTORM
INCLUDE NORTHCOTE AND HALLOCK.

FOR MOTORISTS ON INTERSTATE 29...THE SEVERE THUNDERSTORM WILL BE
BETWEEN...MILE MARKER 215 AROUND 425 PM CDT...AND MILE MARKER 205
AROUND 445 PM CDT...

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

LAT...LON 4873 9676 4868 9754 4899 9755 4901 9751
      4901 9718
TIME...MOT...LOC 2123Z 319DEG 19KT 4895 9731
WIND...HAIL 60MPH 1.00IN

$$

JAR

1 follow-up statement

462 
WWUS53 KFGF 212205
SVSFGF

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE EASTERN ND/GRAND FORKS ND
505 PM CDT THU JUN 21 2012

MNC069-NDC067-212216-
/O.CAN.KFGF.SV.W.0037.000000T0000Z-120621T2230Z/
KITTSON MN-PEMBINA ND-
505 PM CDT THU JUN 21 2012

...THE SEVERE THUNDERSTORM WARNING FOR NORTHWESTERN KITTSON COUNTY IN
NORTHWEST MINNESOTA...AND NORTHEASTERN PEMBINA COUNTY IN NORTHEAST
NORTH DAKOTA IS CANCELLED...

THE STORM WHICH PROMPTED THE WARNING HAS WEAKENED BELOW SEVERE
LIMITS...AND NO LONGER POSES AN IMMEDIATE THREAT TO LIFE OR PROPERTY.
 HOWEVER SMALL HAIL AND HEAVY RAIN ARE STILL POSSIBLE WITH THIS
THUNDERSTORM.

LAT...LON 4873 9676 4868 9754 4899 9755 4901 9751
      4901 9718
TIME...MOT...LOC 2206Z 319DEG 19KT 4878 9708

$$

JAR

The office that day

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

Issued	Product	Office	Counties	Lasted
Jun 20, 7:14 PM CDT	Special Weather Statement	FGF	Marshall	31 min
Jun 20, 9:30 PM CDT	Special Weather Statement	FGF	Mahnomen	30 min
Jun 21, 4:15 PM CDT	Special Weather Statement	FGF	Kittson	60 min
Jun 21, 5:05 PM CDT	Special Weather Statement	FGF	Marshall	55 min
Jun 21, 5:37 PM CDT	Special Weather Statement	FGF	Marshall	68 min
Jun 21, 5:57 PM CDT	Severe Thunderstorm Warning	FGF	Marshall	30 min

Nearby

Severe Thunderstorm Warnings in North Dakota, 2012 Severe Thunderstorm Warnings in Minnesota, 2012 Every 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; local storm reports from the same archive; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.