Alert archive / North Dakota / Severe Thunderstorm Warnings in 2015

Severe Thunderstorm Warning 49, NWS Grand Forks, ND

July 8, 2015Walsh County, North Dakota; Marshall County, Minnesota

NWS Grand Forks, ND issued this severe thunderstorm warning at Jul 8, 2015, 5:30 PM CDT for Walsh County, North Dakota; Marshall County, Minnesota. It was in force for 41 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 8, 2015, 5:30 PM CDT (22:30 UTC)
Expired: Jul 8, 2015, 6:11 PM CDT
In force: 41 min
Issued by: NWS Grand Forks, ND
Area: Storm-based polygon
Hail: 1.0 in
Wind: 50.0 mph

Counties Marshall County, MN, Walsh County, ND

The radar

The Fargo/Grand Forks radar (KMVX), 96 km from the middle of the area, began a volume at 22:31 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 8, 5:40 PM CDT	HAIL 1	1 E Grafton, ND	VIA SOCIAL MEDIA

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, 10.5 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: 0 J/kg
Mixed-layer CIN: No buoyant parcel
Mixed-layer LCL: 1395 m above ground
0-6 km bulk shear: 53 kt
0-1 km storm-relative helicity: 85 m²/s²
0-3 km storm-relative helicity: 100 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.

183 
WUUS53 KFGF 082230
SVRFGF
MNC089-NDC099-082330-
/O.NEW.KFGF.SV.W.0049.150708T2230Z-150708T2330Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE EASTERN ND/GRAND FORKS ND
530 PM CDT WED JUL 8 2015

THE NATIONAL WEATHER SERVICE IN GRAND FORKS HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  WEST CENTRAL MARSHALL COUNTY IN NORTHWESTERN MINNESOTA...
  EASTERN WALSH COUNTY IN NORTHEASTERN NORTH DAKOTA...

* UNTIL 630 PM CDT

* AT 530 PM CDT...A SEVERE THUNDERSTORM WAS LOCATED OVER OAKWOOD...OR
  NEAR GRAFTON...MOVING SOUTHEAST AT 15 MPH.

  HAZARD...QUARTER SIZE HAIL. 

  SOURCE...RADAR INDICATED. 

  IMPACT...DAMAGE TO VEHICLES IS EXPECTED. 

* THIS SEVERE THUNDERSTORM WILL BE NEAR...
  OAKWOOD AROUND 540 PM CDT.
  WARSAW AROUND 615 PM CDT.
  BIG WOODS AROUND 630 PM CDT.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

FOR YOUR PROTECTION MOVE TO AN INTERIOR ROOM ON THE LOWEST FLOOR OF A
BUILDING.

&&

LAT...LON 4831 9696 4820 9717 4844 9747 4854 9733
      4854 9731
TIME...MOT...LOC 2230Z 315DEG 12KT 4844 9734 

HAIL...1.00IN
WIND...<50MPH
 
$$

DTR

1 follow-up statement

027 
WWUS53 KFGF 082311
SVSFGF

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE EASTERN ND/GRAND FORKS ND
611 PM CDT WED JUL 8 2015

MNC089-NDC099-082320-
/O.CAN.KFGF.SV.W.0049.000000T0000Z-150708T2330Z/
MARSHALL MN-WALSH ND-
611 PM CDT WED JUL 8 2015

...THE SEVERE THUNDERSTORM WARNING FOR WEST CENTRAL MARSHALL AND
EXTREME EASTERN WALSH COUNTIES IS CANCELLED...
    
THE SEVERE THUNDERSTORM WHICH PROMPTED THE WARNING HAS HAS MOVED OUT 
OF THE WARNING AREA, THEREFORE THE WARNING HAS BEEN CANCELLED.  THE 
IS THE WARNING THAT WAS FOR WARSAW AND OAKWOOD.  

THE SEVERES THUNDERSTORM WARNING FOR THE STORM NEAR MINTO IS STILL 
IN EFFECT UNTIL 7 PM.  


LAT...LON 4831 9696 4820 9717 4844 9747 4854 9733
      4854 9731
TIME...MOT...LOC 2308Z 315DEG 12KT 4829 9723 

$$

DTR

The office that day

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

Issued	Product	Office	Counties	Lasted
Jul 8, 3:43 PM CDT	Special Weather Statement	FGF	Walsh	32 min
Jul 8, 4:51 PM CDT	Severe Thunderstorm Warning	FGF	Pembina, Walsh	39 min
Jul 8, 6:00 PM CDT	Severe Thunderstorm Warning	FGF	Walsh	44 min
Jul 8, 6:41 PM CDT	Special Weather Statement	FGF	Grand Forks	34 min

Nearby

Severe Thunderstorm Warnings in North Dakota, 2015 Severe Thunderstorm Warnings in Minnesota, 2015 Every severe thunderstorm warning in 2015

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.