Alert archive / North Dakota / Severe Thunderstorm Warnings in 2007

Severe Thunderstorm Warning 13, NWS Grand Forks, ND

May 18, 2007Barnes County, North Dakota

NWS Grand Forks, ND issued this severe thunderstorm warning at May 18, 2007, 8:11 PM CDT for Barnes County, North Dakota. It was in force for 64 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: May 18, 2007, 8:11 PM CDT (01:11 UTC)
Expired: May 18, 2007, 9:15 PM CDT
In force: 64 min
Issued by: NWS Grand Forks, ND
Area: Counties, with a storm outline in the text

County Barnes County, ND

The radar

The Fargo/Grand Forks radar (KMVX), 60 km from the middle of the area, began a volume at 01:11 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
May 18, 8:20 PM CDT	HAIL 1.75	2 E Sibley, ND
May 18, 9:14 PM CDT	HAIL 1	2 E Oriska, ND

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
May 18, 3:43 PM CDT	Severe Thunderstorm Watch	SPC	7 hr

The nearest sounding before it

Bismarck Municip, ND (KBIS), launched 00:00Z, 1.2 hours before the alert went out and 218 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: 858 J/kg
Mixed-layer CIN: -72 J/kg
Mixed-layer LCL: 2820 m above ground
0-6 km bulk shear: 24 kt
0-1 km storm-relative helicity: 46 m²/s²
0-3 km storm-relative helicity: 72 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.7

Open this sounding in Storm Lab

The text

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

000 
WUUS53 KFGF 190111
SVRFGF
NDC003-190215-
/O.NEW.KFGF.SV.W.0013.070519T0111Z-070519T0215Z/

BULLETIN - EAS ACTIVATION REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE EASTERN ND/GRAND FORKS
811 PM CDT FRI MAY 18 2007

THE NATIONAL WEATHER SERVICE IN GRAND FORKS HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  NORTHEASTERN BARNES COUNTY IN SOUTHEAST NORTH DAKOTA...

* UNTIL 915 PM CDT

* AT 807 PM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
  SEVERE THUNDERSTORM CAPABLE OF PRODUCING PENNY SIZE HAIL. THE STORM
  WAS LOCATED 4 MILES SOUTH OF SIBLEY...OR 16 MILES NORTH OF VALLEY
  CITY...MOVING TO THE SOUTHEAST AT 15 MPH.

* THE SEVERE THUNDERSTORM WILL BE NEAR...
  RURAL NORTHEASTERN BARNES COUNTY AT 830 PM CDT...
  RURAL EASTERN BARNES COUNTY AT 840 PM CDT...

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

LAT...LON 4724 9787 4714 9814 4689 9774 4714 9773

$$
DK

The office that day

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

Issued	Product	Office	Counties	Lasted
May 18, 8:02 PM CDT	Severe Thunderstorm Warning	FGF	Benson, Ramsey	58 min
May 18, 8:07 PM CDT	Severe Thunderstorm Warning	FGF	Cass	53 min
May 18, 8:20 PM CDT	Tornado Warning	FGF	Barnes	55 min
May 18, 9:01 PM CDT	Severe Thunderstorm Warning	FGF	Cass	59 min
May 18, 9:08 PM CDT	Flash Flood Warning	FGF	Cass	12 hr
May 18, 9:16 PM CDT	Severe Thunderstorm Warning	FGF	Barnes	43 min
May 18, 10:17 PM CDT	Severe Thunderstorm Warning	FGF	Cass	58 min
May 18, 11:25 PM CDT	Severe Thunderstorm Warning	FGF	Cass, Traill	65 min
May 18, 11:53 PM CDT	Severe Thunderstorm Warning	FGF	Barnes	52 min

Nearby

Severe Thunderstorm Warnings in North Dakota, 2007 Every severe thunderstorm warning in 2007

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.