Alert archive / North Dakota / Severe Thunderstorm Warnings in 2011

Severe Thunderstorm Warning 63, NWS Grand Forks, ND

July 15, 2011Ransom County, Richland County, North Dakota

NWS Grand Forks, ND issued this severe thunderstorm warning at Jul 15, 2011, 3:53 AM CDT for Ransom County, Richland County, North Dakota. It was in force for 52 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 15, 2011, 3:53 AM CDT (08:53 UTC)
Expired: Jul 15, 2011, 4:45 AM CDT
In force: 52 min
Issued by: NWS Grand Forks, ND
Area: Storm-based polygon
Hail: 1.0 in
Wind: 60.0 mph

Counties Ransom County, ND, Richland County, ND

The radar

The Fargo/Grand Forks radar (KMVX), 117 km from the middle of the area, began a volume at 08:55 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 15, 4:05 AM CDT	HAIL 1	Mcleod, ND	NICKEL TO QUARTER SIZED HAIL WAS REPORTED BY MULTIPLE SOURCES AND OCCURRED MAINLY BETWEEN 405 AND 410 AM CDT.

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 15, 2:56 AM CDT	Severe Thunderstorm Watch	SPC	7 hr

The nearest sounding before it

Aberdeen, SD (KABR), launched 00:00Z, 8.9 hours before the alert went out and 197 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: 4277 J/kg
Mixed-layer CIN: -5 J/kg
Mixed-layer LCL: 763 m above ground
0-6 km bulk shear: 46 kt
0-1 km storm-relative helicity: 180 m²/s²
0-3 km storm-relative helicity: 197 m²/s²
Significant tornado parameter: 4.1
Supercell composite: 19.7

Open this sounding in Storm Lab

The text

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

842 
WUUS53 KFGF 150853
SVRFGF
NDC073-077-150945-
/O.NEW.KFGF.SV.W.0063.110715T0853Z-110715T0945Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE EASTERN ND/GRAND FORKS ND
353 AM CDT FRI JUL 15 2011

THE NATIONAL WEATHER SERVICE IN GRAND FORKS HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  SOUTHEASTERN RANSOM COUNTY IN SOUTHEAST NORTH DAKOTA...
  NORTHWESTERN RICHLAND COUNTY IN SOUTHEAST NORTH DAKOTA...

* UNTIL 445 AM CDT

* AT 350 AM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
  SEVERE THUNDERSTORM CAPABLE OF PRODUCING QUARTER SIZE HAIL...AND
  DAMAGING WINDS IN EXCESS OF 60 MPH. THE STORM WAS LOCATED 6 MILES
  SOUTH OF VENLO...OR 42 MILES WEST OF WAHPETON...MOVING TO THE
  NORTHEAST AT 30 MPH.

* THE SEVERE THUNDERSTORM WILL BE NEAR...
  MCLEOD AROUND 405 AM CDT.
  BARRIE AROUND 425 AM CDT.
  WALCOTT AND COLFAX AROUND 440 AM CDT.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

LAT...LON 4644 9762 4662 9712 4663 9687 4648 9674
      4628 9751
TIME...MOT...LOC 0852Z 245DEG 28KT 4640 9744
WIND...HAIL 60MPH 1.00IN

$$

HOPPES

The office that day

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

Issued	Product	Office	Counties	Lasted
Jul 15, 2:11 AM CDT	Severe Thunderstorm Warning	FGF	Griggs	64 min
Jul 15, 2:41 AM CDT	Severe Thunderstorm Warning	FGF	Barnes	64 min
Jul 15, 3:25 AM CDT	Tornado Warning	FGF	Barnes	50 min
Jul 15, 4:03 AM CDT	Excessive Heat Watch	FGF	Barnes, Benson, Cass, Eddy, Grand Forks, Griggs and 9 more	24 hr
Jul 15, 4:04 AM CDT	Severe Thunderstorm Warning	FGF	Barnes, Cass	56 min
Jul 15, 4:18 AM CDT	Tornado Warning	FGF	Ransom, Richland	42 min
Jul 15, 4:50 AM CDT	Severe Thunderstorm Warning	FGF	Richland	55 min
Jul 15, 5:00 AM CDT	Severe Thunderstorm Warning	FGF	Cass, Traill	43 min
Jul 15, 5:11 AM CDT	Areal Flood Advisory	FGF	Barnes	9 hr
Jul 15, 5:12 AM CDT	Tornado Warning	FGF	Richland	39 min
Jul 15, 5:47 AM CDT	Severe Thunderstorm Warning	FGF	Richland	58 min
Jul 15, 3:15 PM CDT	Excessive Heat Warning	FGF	Barnes, Cass, Eddy, Grand Forks, Griggs, Nelson and 5 more	5 days

Nearby

Severe Thunderstorm Warnings in North Dakota, 2011 Every severe thunderstorm warning in 2011

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.