Alert archive / North Dakota / Severe Thunderstorm Warnings in 2012

Severe Thunderstorm Warning 95, NWS Grand Forks, ND

July 24, 2012Polk County, Minnesota; Grand Forks County, Traill County, North Dakota

NWS Grand Forks, ND issued this severe thunderstorm warning at Jul 24, 2012, 11:28 PM CDT for Polk County, Minnesota; Grand Forks County, Traill County, North Dakota. It was in force for 62 min. 1 report 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 24, 2012, 11:28 PM CDT (04:28 UTC)
Expired: Jul 25, 2012, 12:30 AM CDT
In force: 62 min
Issued by: NWS Grand Forks, ND
Area: Storm-based polygon
Hail: 0.75 in
Wind: 60.0 mph

Counties Polk County, MN, Grand Forks County, ND, Traill County, ND

The radar

The Fargo/Grand Forks radar (KMVX), 29 km from the middle of the area, began a volume at 04:28 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 24, 11:50 PM CDT	TSTM WND DMG	2 Ne Thompson, ND	NUMEROUS 8 INCH DIAMETER TREES DOWN FROM CENTRAL ALLENDALE INTO CENTRAL WALLE TOWNSHIP NORTH OF THOMPSON

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 24, 9:08 PM CDT	Severe Thunderstorm Watch	SPC	7 hr

The nearest sounding before it

Bismarck Municip, ND (KBIS), launched 00:00Z, 4.5 hours before the alert went out and 288 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: 2307 J/kg
Mixed-layer CIN: -32 J/kg
Mixed-layer LCL: 899 m above ground
0-6 km bulk shear: 46 kt
0-1 km storm-relative helicity: 102 m²/s²
0-3 km storm-relative helicity: 186 m²/s²
Significant tornado parameter: 0.8
Supercell composite: 3.8

Open this sounding in Storm Lab

The text

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

274 
WUUS53 KFGF 250428
SVRFGF
MNC119-NDC035-097-250530-
/O.NEW.KFGF.SV.W.0095.120725T0428Z-120725T0530Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE EASTERN ND/GRAND FORKS ND
1128 PM CDT TUE JUL 24 2012

THE NATIONAL WEATHER SERVICE IN GRAND FORKS HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  WESTERN POLK COUNTY IN NORTHWEST MINNESOTA...
  EASTERN GRAND FORKS COUNTY IN NORTHEAST NORTH DAKOTA...
  NORTHERN TRAILL COUNTY IN SOUTHEAST NORTH DAKOTA...

* UNTIL 1230 AM CDT

* AT 1124 PM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
  LINE OF SEVERE THUNDERSTORMS CAPABLE OF PRODUCING DAMAGING WINDS IN
  EXCESS OF 60 MPH. THE STORMS WERE LOCATED ALONG A LINE EXTENDING
  FROM NEAR GRAND FORKS AFB TO NEAR HATTON...MOVING TO THE EAST AT 40
  MPH. ALSO PENNY SIZE HAIL MAY ACCOMPANY THE DAMAGING WINDS.

* SEVERE THUNDERSTORMS WILL BE NEAR...
  HOLMES AROUND 1135 PM CDT.
  GRAND FORKS...THOMPSON AND REYNOLDS AROUND 1145 PM CDT.
  EAST GRAND FORKS AND BUXTON AROUND 1150 PM CDT.
  BYGLAND AND MALLORY AROUND MIDNIGHT CDT.

THEREAFTER SOME OTHER LOCATIONS IMPACTED BY THE SEVERE THUNDERSTORMS
INCLUDE SHERACK...FISHER...EUCLID...CROOKSTON...GREENVIEW AND HAROLD.

FOR MOTORISTS ON INTERSTATE 29...SEVERE THUNDERSTORMS WILL BE
BETWEEN...MILE MARKERS 114 AND 150...

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

LAT...LON 4804 9651 4753 9648 4754 9733 4761 9748
      4767 9747 4767 9759 4768 9761 4807 9752
TIME...MOT...LOC 0428Z 269DEG 34KT 4795 9731 4764 9738
WIND...HAIL 60MPH 0.75IN

$$

TG

3 follow-up statements

461 
WWUS53 KFGF 250441
SVSFGF

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE EASTERN ND/GRAND FORKS ND
1141 PM CDT TUE JUL 24 2012

MNC119-NDC035-097-250530-
/O.CON.KFGF.SV.W.0095.000000T0000Z-120725T0530Z/
GRAND FORKS ND-TRAILL ND-POLK MN-
1141 PM CDT TUE JUL 24 2012

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT FOR WESTERN POLK
COUNTY IN NORTHWEST MINNESOTA...AND EASTERN GRAND FORKS COUNTY IN
NORTHEAST NORTH DAKOTA...AND NORTHERN TRAILL COUNTY IN SOUTHEAST
NORTH DAKOTA UNTIL 1230 AM CDT...

AT 1138 PM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
LINE OF SEVERE THUNDERSTORMS CAPABLE OF PRODUCING DAMAGING WINDS IN
EXCESS OF 60 MPH.  THE STORMS WERE LOCATED ALONG A LINE EXTENDING
FROM 5 MILES EAST OF EMERADO TO 6 MILES NORTHWEST OF THOMPSON TO 2
MILES NORTHEAST OF HOLMES...MOVING TO THE EAST AT 40 MPH. PENNY SIZE
HAIL MAY ALSO ACCOMPANY THESE DAMAGING WINDS.

SEVERE THUNDERSTORMS WILL BE NEAR...
  GRAND FORKS...THOMPSON AND REYNOLDS AROUND 1150 PM CDT.
  EAST GRAND FORKS AROUND 1155 PM CDT.
  MALLORY AND BYGLAND AROUND MIDNIGHT CDT.
  DAVIDSON AROUND 1205 AM CDT.

THEREAFTER SOME OTHER LOCATIONS IMPACTED BY SEVERE THUNDERSTORMS
INCLUDE BUXTON...SHERACK...KEY WEST...FISHER...ELDRED AND CLIMAX.

FOR MOTORISTS ON INTERSTATE 29...SEVERE THUNDERSTORMS WILL BE
BETWEEN...MILE MARKERS 114 AND 150...

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

LAT...LON 4804 9651 4753 9648 4754 9733 4761 9748
      4767 9747 4767 9759 4768 9761 4807 9752
TIME...MOT...LOC 0441Z 269DEG 34KT 4793 9721 4783 9716
          4774 9722
WIND...HAIL 60MPH 0.75IN

$$

DK

221 
WWUS53 KFGF 250509
SVSFGF

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE EASTERN ND/GRAND FORKS ND
1209 AM CDT WED JUL 25 2012

MNC119-NDC035-097-250530-
/O.CON.KFGF.SV.W.0095.000000T0000Z-120725T0530Z/
GRAND FORKS ND-TRAILL ND-POLK MN-
1209 AM CDT WED JUL 25 2012

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT FOR WESTERN POLK
COUNTY IN NORTHWEST MINNESOTA...AND SOUTHEASTERN GRAND FORKS COUNTY
IN NORTHEAST NORTH DAKOTA...AND NORTHEASTERN TRAILL COUNTY IN
SOUTHEAST NORTH DAKOTA UNTIL 1230 AM CDT...

AT 1205 AM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
LINE OF SEVERE THUNDERSTORMS CAPABLE OF PRODUCING DAMAGING WINDS IN
EXCESS OF 60 MPH.  THE STORMS WERE LOCATED ALONG A LINE EXTENDING
FROM 4 MILES NORTH OF DAVIDSON TO 3 MILES WEST OF FISHER TO 6 MILES
EAST OF BUXTON...MOVING TO THE EAST AT 40 MPH.

SEVERE THUNDERSTORMS WILL BE NEAR...
  ELDRED AND CLIMAX AROUND 1215 AM CDT.
  EUCLID AROUND 1220 AM CDT.
  CROOKSTON AROUND 1225 AM CDT.
  HAROLD...GREENVIEW AND BELTRAMI AROUND 1230 AM CDT.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

LAT...LON 4757 9728 4774 9729 4805 9724 4804 9651
      4753 9648
TIME...MOT...LOC 0509Z 269DEG 34KT 4793 9681 4781 9681
          4758 9692
WIND...HAIL 60MPH <.75IN

$$

DK

109 
WWUS53 KFGF 250529
SVSFGF

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE EASTERN ND/GRAND FORKS ND
1229 AM CDT WED JUL 25 2012

MNC119-NDC035-097-250539-
/O.EXP.KFGF.SV.W.0095.000000T0000Z-120725T0530Z/
GRAND FORKS ND-TRAILL ND-POLK MN-
1229 AM CDT WED JUL 25 2012

...THE SEVERE THUNDERSTORM WARNING FOR WESTERN POLK COUNTY IN
NORTHWEST MINNESOTA...AND SOUTHEASTERN GRAND FORKS COUNTY IN
NORTHEAST NORTH DAKOTA...AND NORTHEASTERN TRAILL COUNTY IN SOUTHEAST
NORTH DAKOTA WILL EXPIRE AT 1230 AM CDT...

THE LINE OF STORMS WHICH PROMPTED THE WARNING HAVE WEAKENED BELOW
SEVERE LIMITS...AND NO LONGER POSES AN IMMEDIATE THREAT TO LIFE OR
PROPERTY.

LAT...LON 4757 9728 4774 9729 4805 9724 4804 9651
      4753 9648
TIME...MOT...LOC 0529Z 269DEG 34KT 4793 9653 4781 9653
          4758 9664

$$

DK

The office that day

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

Issued	Product	Office	Counties	Lasted
Jul 24, 10:01 PM CDT	Severe Thunderstorm Warning	FGF	Clay, Wilkin	59 min
Jul 24, 10:59 PM CDT	Severe Thunderstorm Warning	FGF	Becker, Clay, Wilkin	61 min
Jul 25, 12:01 AM CDT	Areal Flood Advisory	FGF	Clay, Wilkin	10 hr
Jul 25, 12:20 AM CDT	Areal Flood Advisory	FGF	Polk	3 hr
Jul 25, 12:28 AM CDT	Severe Thunderstorm Warning	FGF	Becker, Clay, Otter Tail, Wilkin	62 min
Jul 25, 1:08 AM CDT	Severe Thunderstorm Warning	FGF	Becker, Hubbard, Otter Tail, Wadena	67 min
Jul 25, 3:18 AM CDT	Areal Flood Advisory	FGF	Becker, Clay, Hubbard, Otter Tail, Wadena, Wilkin	7 hr
Jul 25, 5:42 PM CDT	Severe Thunderstorm Warning	FGF	Beltrami	63 min
Jul 25, 6:02 PM CDT	Special Weather Statement	FGF	Becker, Clearwater, Hubbard, Mahnomen, Otter Tail, Wadena and 1 more	58 min
Jul 25, 6:13 PM CDT	Special Weather Statement	FGF	Lake of the Woods	62 min
Jul 24, 8:25 PM CDT	Areal Flood Advisory	FGF	Benson, Ramsey	5 hr
Jul 24, 10:11 PM CDT	Special Weather Statement	FGF	Grand Forks, Nelson	64 min
Jul 24, 10:20 PM CDT	Severe Thunderstorm Warning	FGF	Barnes, Cass, Ransom	55 min
Jul 24, 10:28 PM CDT	Severe Thunderstorm Warning	FGF	Grand Forks, Nelson	62 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.