Alert archive / Minnesota / Tornado Warnings in 2014

Tornado Warning 19, NWS Grand Forks, ND

July 21, 2014Norman County, Polk County, Minnesota

NWS Grand Forks, ND issued this tornado warning at Jul 21, 2014, 9:08 PM CDT for Norman County, Polk County, Minnesota. It was in force for 33 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 21, 2014, 9:08 PM CDT (02:08 UTC)
Expired: Jul 21, 2014, 9:41 PM CDT
In force: 33 min
Issued by: NWS Grand Forks, ND
Area: Storm-based polygon
Tornado: Radar indicated
Hail: 0.75 in

Counties Norman County, MN, Polk County, MN

The radar

The Fargo/Grand Forks radar (KMVX), 74 km from the middle of the area, began a volume at 02:10 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 21, 9:15 PM CDT	TSTM WND DMG	Lockhart, MN	SEVERAL LARGE TREE BRANCHESAND LIMBS WERE BROKEN DOWN ACROSS GOODHOPE AND LOCKHART TOWNSHIPS.
Jul 21, 9:32 PM CDT	TSTM WND DMG	Maple Bay, MN	NUMEROUS LARGE TREE BRANCHES AND LIMBS WERE BROKEN DOWN ACROSS MAPLE LAKE AND MENTOR.

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 21, 5:07 PM CDT	Severe Thunderstorm Watch	SPC	6 hr

The nearest sounding before it

International Fa, MN (KINL), launched 00:00Z, 2.1 hours before the alert went out and 253 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: 3234 J/kg
Mixed-layer CIN: -14 J/kg
Mixed-layer LCL: 1331 m above ground
0-6 km bulk shear: 32 kt
0-1 km storm-relative helicity: 22 m²/s²
0-3 km storm-relative helicity: 98 m²/s²
Significant tornado parameter: 0.3
Supercell composite: 3.2

Open this sounding in Storm Lab

The text

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

960 
WFUS53 KFGF 220208
TORFGF
MNC107-119-220300-
/O.NEW.KFGF.TO.W.0019.140722T0208Z-140722T0300Z/

BULLETIN - EAS ACTIVATION REQUESTED
TORNADO WARNING
NATIONAL WEATHER SERVICE EASTERN ND/GRAND FORKS ND
908 PM CDT MON JUL 21 2014

THE NATIONAL WEATHER SERVICE IN GRAND FORKS HAS ISSUED A

* TORNADO WARNING FOR...
  NORTHEASTERN NORMAN COUNTY IN NORTHWEST MINNESOTA...
  SOUTH CENTRAL POLK COUNTY IN NORTHWEST MINNESOTA...

* UNTIL 1000 PM CDT

* AT 905 PM CDT...A SEVERE SQUALL LINE CAPABLE OF PRODUCING TORNADOES
  THAT MAY NOT BE VISIBLE DUE TO HEAVY RAIN WAS LOCATED NEAR
  LOCKHART...AND MOVING NORTHEAST AT 20 MPH.

  HAZARD...TORNADO.

  SOURCE...RADAR INDICATED ROTATION.

  IMPACT...EXPECT DAMAGE TO MOBILE HOMES...ROOFS AND VEHICLES.

* THIS DANGEROUS STORM WILL BE NEAR...
  BELTRAMI AROUND 920 PM CDT.
  FLAMING AROUND 940 PM CDT.
  FERTILE AROUND 945 PM CDT.
  MAPLE BAY AROUND 1000 PM CDT.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

TO REPORT SEVERE WEATHER CONTACT YOUR NEAREST LAW ENFORCEMENT AGENCY.
THEY WILL SEND YOUR REPORT TO THE NATIONAL WEATHER SERVICE IN GRAND
FORKS.

&&

LAT...LON 4773 9619 4738 9608 4735 9657 4750 9667
TIME...MOT...LOC 0208Z 241DEG 19KT 4745 9656

TORNADO...RADAR INDICATED
HAIL...<.75IN

$$

JR

2 follow-up statements

535 
WWUS53 KFGF 220223
SVSFGF

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE EASTERN ND/GRAND FORKS ND
923 PM CDT MON JUL 21 2014

MNC107-119-220300-
/O.CON.KFGF.TO.W.0019.000000T0000Z-140722T0300Z/
NORMAN MN-POLK MN-
923 PM CDT MON JUL 21 2014

...A TORNADO WARNING REMAINS IN EFFECT FOR SOUTH CENTRAL POLK AND
NORTHEASTERN NORMAN COUNTIES UNTIL 1000 PM CDT...

AT 921 PM CDT...A SEVERE SQUALL LINE CAPABLE OF PRODUCING TORNADOES
THAT MAY NOT BE VISIBLE DUE TO HEAVY RAIN WAS LOCATED NEAR FLAMING...
AND MOVING EAST AT 50 MPH.

HAZARD...TORNADO.

SOURCE...RADAR INDICATED ROTATION.

IMPACT...EXPECT DAMAGE TO MOBILE HOMES...ROOFS AND VEHICLES.

THE DANGEROUS STORM WILL BE NEAR...
  RANUM AND RINDAL AROUND 930 PM CDT.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

TO REPORT SEVERE WEATHER CONTACT YOUR NEAREST LAW ENFORCEMENT AGENCY.
THEY WILL SEND YOUR REPORT TO THE NATIONAL WEATHER SERVICE IN GRAND
FORKS.

&&

LAT...LON 4737 9632 4761 9644 4773 9619 4738 9608
TIME...MOT...LOC 0223Z 262DEG 44KT 4746 9627

TORNADO...RADAR INDICATED
HAIL...<.75IN

$$

JR

594 
WWUS53 KFGF 220241 RRA
SVSFGF

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE EASTERN ND/GRAND FORKS ND
941 PM CDT MON JUL 21 2014

MNC107-119-220251-
/O.CAN.KFGF.TO.W.0019.000000T0000Z-140722T0300Z/
NORMAN MN-POLK MN-
941 PM CDT MON JUL 21 2014

...THE TORNADO WARNING FOR SOUTH CENTRAL POLK AND NORTHEASTERN NORMAN
COUNTIES IS CANCELLED...

THE STORM WHICH PROMPTED THE WARNING HAS WEAKENED AND MOVED OUT OF
THE WARNED AREA.  HOWEVER...GUSTY WINDS AND HEAVY RAIN ARE STILL
POSSIBLE WITH THIS THUNDERSTORM.

LAT...LON 4737 9632 4761 9644 4773 9619 4738 9608
TIME...MOT...LOC 0241Z 262DEG 44KT 4749 9595

$$

JR

The office that day

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

Issued	Product	Office	Counties	Lasted
Jul 21, 7:48 PM CDT	Severe Thunderstorm Warning	FGF	Polk	57 min
Jul 21, 8:26 PM CDT	Flash Flood Warning	FGF	Polk	6 hr
Jul 21, 8:43 PM CDT	Severe Thunderstorm Warning	FGF	Clay, Norman, Polk	46 min
Jul 21, 8:58 PM CDT	Tornado Warning	FGF	Pennington, Polk, Red Lake	47 min
Jul 21, 9:15 PM CDT	Severe Thunderstorm Warning	FGF	Becker, Beltrami, Clay, Clearwater, Mahnomen, Marshall and 4 more	60 min
Jul 21, 10:01 PM CDT	Severe Thunderstorm Warning	FGF	Becker, Beltrami, Clearwater, Hubbard, Lake of the Woods, Mahnomen and 3 more	59 min
Jul 21, 10:14 PM CDT	Special Weather Statement	FGF	Grant	46 min
Jul 21, 10:32 PM CDT	Flash Flood Warning	FGF	Marshall, Pennington, Polk, Red Lake	8 hr
Jul 21, 11:01 PM CDT	Special Weather Statement	FGF	Wadena	29 min
Jul 21, 11:10 PM CDT	High Wind Warning	FGF	Mahnomen, Norman, Pennington, Polk, Red Lake	5 hr
Jul 22, 12:08 AM CDT	Areal Flood Advisory	FGF	Beltrami, Lake of the Woods, Roseau	7 hr
Jul 22, 6:28 AM CDT	River Flood Warning	FGF	Marshall	42 hr
Jul 22, 6:28 AM CDT	River Flood Warning	FGF	Marshall	3 days

Nearby

Tornado Warnings in Minnesota, 2014 Every tornado warning in 2014 Tornadoes in 2014

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.