Alert archive / Minnesota / Severe Thunderstorm Warnings in 2012

Severe Thunderstorm Warning 89, NWS Grand Forks, ND

July 22, 2012Becker County, Otter Tail County, Minnesota

NWS Grand Forks, ND issued this severe thunderstorm warning at Jul 22, 2012, 8:15 PM CDT for Becker County, Otter Tail County, Minnesota. It was in force for 18 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: Jul 22, 2012, 8:15 PM CDT (01:15 UTC)
Expired: Jul 22, 2012, 8:33 PM CDT
In force: 18 min
Issued by: NWS Grand Forks, ND
Area: Storm-based polygon
Hail: 1.0 in
Wind: 50.0 mph

Counties Becker County, MN, Otter Tail County, MN

The radar

The Fargo/Grand Forks radar (KMVX), 162 km from the middle of the area, began a volume at 01:17 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 22, 8:25 PM CDT	HAIL 1	2 S Osage, MN
Jul 22, 8:30 PM CDT	HAIL 1	Wolf Lake, MN	PHOTOS POSTED TO FACEBOOK. TIME ESTIMATED FROM RADAR IMAGERY.

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
Jul 22, 3:25 PM CDT	Severe Thunderstorm Watch	SPC	6 hr

The nearest sounding before it

International Fa, MN (KINL), launched 00:00Z, 1.3 hours before the alert went out and 256 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: 1588 J/kg
Mixed-layer CIN: -62 J/kg
Mixed-layer LCL: 1243 m above ground
0-6 km bulk shear: 52 kt
0-1 km storm-relative helicity: 19 m²/s²
0-3 km storm-relative helicity: 218 m²/s²
Significant tornado parameter: 0.8
Supercell composite: 5.6

Open this sounding in Storm Lab

The text

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

340 
WUUS53 KFGF 230115
SVRFGF
MNC005-111-230215-
/O.NEW.KFGF.SV.W.0089.120723T0115Z-120723T0215Z/

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

THE NATIONAL WEATHER SERVICE IN GRAND FORKS HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  SOUTHEASTERN BECKER COUNTY IN NORTHWEST MINNESOTA...
  NORTHEASTERN OTTER TAIL COUNTY IN WEST CENTRAL MINNESOTA...

* UNTIL 915 PM CDT

* AT 812 PM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
  SEVERE THUNDERSTORM CAPABLE OF PRODUCING QUARTER SIZE HAIL. THE
  STORM WAS LOCATED 4 MILES SOUTH OF DETROIT LAKES...MOVING TO THE
  EAST AT 30 MPH.

* THE SEVERE THUNDERSTORM WILL BE NEAR...
  FRAZEE AND ROCHERT AROUND 825 PM CDT.
  HEIGHT OF LAND LAKE AROUND 830 PM CDT.
  TOAD LAKE AROUND 840 PM CDT.
  EVERGREEN AROUND 845 PM CDT.

THEREAFTER SOME OTHER LOCATIONS IMPACTED BY THE SEVERE THUNDERSTORM
INCLUDE SNELLMAN...WOLF LAKE AND MIDWAY.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

LAT...LON 4690 9519 4656 9517 4668 9595 4691 9588
TIME...MOT...LOC 0115Z 278DEG 26KT 4676 9579
WIND...HAIL <50MPH 1.00IN

$$

HOPKINS

1 follow-up statement

830 
WWUS53 KFGF 230133
SVSFGF

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

MNC005-111-230142-
/O.CAN.KFGF.SV.W.0089.000000T0000Z-120723T0215Z/
OTTER TAIL MN-BECKER MN-
833 PM CDT SUN JUL 22 2012

...THE SEVERE THUNDERSTORM WARNING FOR SOUTHEASTERN BECKER COUNTY IN
NORTHWEST MINNESOTA...AND NORTHEASTERN OTTER TAIL COUNTY IN WEST
CENTRAL MINNESOTA 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 IS STILL POSSIBLE WITH THIS THUNDERSTORM.

IN ADDITION...STRONG THUNDERSTORMS MAY REDEVELOP...AND A SEVERE 
THUNDERSTORM WATCH REMAINS IN EFFECT UNTIL 1000 PM CDT.

LAT...LON 4690 9519 4656 9517 4668 9595 4691 9588
TIME...MOT...LOC 0132Z 278DEG 26KT 4674 9561

$$

HOPKINS

The office that day

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

Issued	Product	Office	Counties	Lasted
Jul 22, 7:21 PM CDT	Special Weather Statement	FGF	Becker	24 min
Jul 22, 7:31 PM CDT	Severe Thunderstorm Warning	FGF	Becker, Clay, Otter Tail	29 min
Jul 22, 8:08 PM CDT	Special Weather Statement	FGF	Becker	67 min
Jul 22, 8:19 PM CDT	Severe Thunderstorm Warning	FGF	Becker, Hubbard, Wadena	37 min

Nearby

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.