Alert archive / Minnesota / Severe Thunderstorm Warnings in 2012

Severe Thunderstorm Warning 46, NWS Grand Forks, ND

July 2, 2012Norman County, Minnesota

NWS Grand Forks, ND issued this severe thunderstorm warning at Jul 2, 2012, 5:22 PM CDT for Norman County, Minnesota. It was in force for 53 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 2, 2012, 5:22 PM CDT (22:22 UTC)
Expired: Jul 2, 2012, 6:15 PM CDT
In force: 53 min
Issued by: NWS Grand Forks, ND
Area: Storm-based polygon
Hail: 1.0 in
Wind: 50.0 mph

County Norman County, MN

The radar

The Fargo/Grand Forks radar (KMVX), 76 km from the middle of the area, began a volume at 22:25 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
Jul 2, 5:35 PM CDT	HAIL 1	3 E Ada, MN
Jul 2, 5:53 PM CDT	HAIL 1	7 E Ada, MN

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 2, 11:43 AM CDT	Severe Thunderstorm Watch	SPC	7 hr

The nearest sounding before it

International Fa, MN (KINL), launched 12:00Z, 10.4 hours before the alert went out and 264 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: 3219 J/kg
Mixed-layer CIN: -31 J/kg
Mixed-layer LCL: 897 m above ground
0-6 km bulk shear: 29 kt
0-1 km storm-relative helicity: 22 m²/s²
0-3 km storm-relative helicity: 88 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 4.5

Open this sounding in Storm Lab

The text

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

429 
WUUS53 KFGF 022222
SVRFGF
MNC107-022315-
/O.NEW.KFGF.SV.W.0046.120702T2222Z-120702T2315Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE EASTERN ND/GRAND FORKS ND
522 PM CDT MON JUL 2 2012

THE NATIONAL WEATHER SERVICE IN GRAND FORKS HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  NORMAN COUNTY IN NORTHWEST MINNESOTA...

* UNTIL 615 PM CDT

* AT 520 PM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
  SEVERE THUNDERSTORM CAPABLE OF PRODUCING QUARTER SIZE HAIL. THE
  STORM WAS LOCATED 4 MILES WEST OF ADA...OR 31 MILES NORTH OF
  FARGO...MOVING TO THE EAST AT 25 MPH.

* THE SEVERE THUNDERSTORM WILL BE NEAR...
  ADA AND HADLER AROUND 530 PM CDT.
  TWIN VALLEY AND GARY AROUND 555 PM CDT.
  FLAMING AROUND 600 PM CDT.
  WAUKON AND RANUM AROUND 610 PM CDT.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

TORRENTIAL RAINFALL IS ALSO OCCURRING WITH THE STORM...AND MAY LEAD
TO FLASH FLOODING. DO NOT DRIVE YOUR VEHICLE THROUGH FLOODED
ROADWAYS.

&&

LAT...LON 4749 9611 4724 9610 4719 9668 4740 9674
TIME...MOT...LOC 2222Z 257DEG 23KT 4730 9658
WIND...HAIL <50MPH 1.00IN

$$

HOPKINS

1 follow-up statement

192 
WWUS53 KFGF 022244
SVSFGF

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE EASTERN ND/GRAND FORKS ND
544 PM CDT MON JUL 2 2012

MNC107-022315-
/O.CON.KFGF.SV.W.0046.000000T0000Z-120702T2315Z/
NORMAN MN-
544 PM CDT MON JUL 2 2012

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT FOR EASTERN NORMAN
COUNTY IN NORTHWEST MINNESOTA UNTIL 615 PM CDT...

AT 543 PM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
SEVERE THUNDERSTORM CAPABLE OF PRODUCING QUARTER SIZE HAIL.  THE
STORM WAS LOCATED 6 MILES EAST OF ADA...OR 37 MILES NORTHEAST OF
FARGO...MOVING TO THE EAST AT 25 MPH.

THE SEVERE THUNDERSTORM WILL BE NEAR...
  TWIN VALLEY AND GARY AROUND 555 PM CDT.
  FLAMING AROUND 600 PM CDT.
  WAUKON AROUND 610 PM CDT.
  RANUM AROUND 615 PM CDT.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

TORRENTIAL RAINFALL IS ALSO OCCURRING WITH THIS STORM...AND MAY LEAD
TO FLASH FLOODING. DO NOT DRIVE YOUR VEHICLE THROUGH FLOODED
ROADWAYS.

&&

LAT...LON 4743 9654 4749 9611 4724 9610 4720 9653
TIME...MOT...LOC 2244Z 257DEG 23KT 4733 9638
WIND...HAIL <50MPH 1.00IN

$$

HOPKINS

The office that day

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

Issued	Product	Office	Counties	Lasted
Jul 2, 4:15 AM CDT	Heat Advisory	FGF	Becker, Clay, Clearwater, Grant, Kittson, Mahnomen and 8 more	15 hr
Jul 2, 1:36 PM CDT	Severe Thunderstorm Warning	FGF	Roseau	39 min
Jul 2, 1:40 PM CDT	Severe Thunderstorm Warning	FGF	Kittson	37 min
Jul 2, 2:03 PM CDT	Special Weather Statement	FGF	Lake of the Woods	42 min
Jul 2, 3:10 PM CDT	Severe Thunderstorm Warning	FGF	Beltrami, Lake of the Woods	35 min
Jul 2, 5:36 PM CDT	Severe Thunderstorm Warning	FGF	Clearwater, Mahnomen, Polk	54 min
Jul 2, 5:53 PM CDT	Special Weather Statement	FGF	Becker	67 min
Jul 2, 6:10 PM CDT	Severe Thunderstorm Warning	FGF	Becker, Clearwater, Mahnomen, Norman, Polk	65 min
Jul 2, 6:30 PM CDT	Severe Thunderstorm Warning	FGF	Becker, Beltrami, Clearwater, Hubbard, Wadena	60 min
Jul 2, 6:33 PM CDT	Severe Thunderstorm Warning	FGF	Becker, Hubbard, Otter Tail, Wadena	57 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.