Alert archive / North Dakota / Severe Thunderstorm Warnings in 2011

Severe Thunderstorm Warning 69, NWS Grand Forks, ND

July 16, 20115 counties in North Dakota

NWS Grand Forks, ND issued this severe thunderstorm warning at Jul 16, 2011, 11:01 AM CDT for 5 counties in North Dakota. It was in force for 59 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 16, 2011, 11:01 AM CDT (16:01 UTC)
Expired: Jul 16, 2011, 12:00 PM CDT
In force: 59 min
Issued by: NWS Grand Forks, ND
Area: Storm-based polygon
Hail: 1.0 in
Wind: 60.0 mph

Counties Grand Forks County, ND, Griggs County, ND, Nelson County, ND, Steele County, ND, Traill County, ND

The radar

The Fargo/Grand Forks radar (KMVX), 21 km from the middle of the area, began a volume at 16:01 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 16, 11:30 AM CDT	TSTM WND DMG	Northwood, ND	TREES BLOWN DOWN.
Jul 16, 12:00 PM CDT	TSTM WND DMG	2 S Thompson, ND	SEVERAL LARGE 3 TO 5 INCH DIAMETER TREE BRANCHES WERE BROKEN DOWN. LARGE PORTIONS OF SMALL GRAIN AND CORN CROPS WERE LODGED BY THE WINDS ACROSS NORTHEAST MICHIGAN AND NORTHERN AMERICUS TOWNSHIPS.

Local storm reports filed while the alert was in force, from inside its polygon or its counties.

The nearest sounding before it

Bismarck Municip, ND (KBIS), launched 12:00Z, 4.0 hours before the alert went out and 265 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: 894 J/kg
Mixed-layer CIN: -182 J/kg
Mixed-layer LCL: 764 m above ground
0-6 km bulk shear: 42 kt
0-1 km storm-relative helicity: 171 m²/s²
0-3 km storm-relative helicity: 261 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 13.2

Open this sounding in Storm Lab

The text

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

992 
WUUS53 KFGF 161601
SVRFGF
NDC035-039-063-091-097-161700-
/O.NEW.KFGF.SV.W.0069.110716T1601Z-110716T1700Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE EASTERN ND/GRAND FORKS ND
1101 AM CDT SAT JUL 16 2011

THE NATIONAL WEATHER SERVICE IN GRAND FORKS HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  SOUTHERN GRAND FORKS COUNTY IN NORTHEAST NORTH DAKOTA...
  NORTHEASTERN GRIGGS COUNTY IN SOUTHEAST NORTH DAKOTA...
  SOUTHEASTERN NELSON COUNTY IN NORTHEAST NORTH DAKOTA...
  NORTHERN STEELE COUNTY IN SOUTHEAST NORTH DAKOTA...
  NORTHERN TRAILL COUNTY IN SOUTHEAST NORTH DAKOTA...

* UNTIL NOON CDT

* AT 1056 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 4 MILES
  SOUTHWEST OF ANETA...OR 49 MILES SOUTHWEST OF GRAND FORKS...MOVING
  TO THE EAST AT 35 MPH.

* THE SEVERE THUNDERSTORM WILL BE NEAR...
  FINLEY AROUND 1105 AM CDT.
  LOGAN CENTER AROUND 1110 AM CDT.
  SHERBROOKE AROUND 1115 AM CDT.
  GOLDEN LAKE AROUND 1120 AM CDT.

THEREAFTER SOME OTHER LOCATIONS IMPACTED BY THE SEVERE THUNDERSTORM
INCLUDE NORTHWOOD...PORTLAND...MAYVILLE...HOLMES AND THOMPSON.

FOR MOTORISTS ON INTERSTATE 29...THE SEVERE THUNDERSTORM WILL BE
BETWEEN...MILE MARKERS 116 AND 134 AROUND 1155 AM CDT...

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

LAT...LON 4790 9704 4744 9689 4745 9817 4776 9814
TIME...MOT...LOC 1601Z 264DEG 38KT 4764 9796
WIND...HAIL 60MPH 1.00IN

$$

JK

2 follow-up statements

836 
WWUS53 KFGF 161622
SVSFGF

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE EASTERN ND/GRAND FORKS ND
1122 AM CDT SAT JUL 16 2011

NDC039-063-161631-
/O.CAN.KFGF.SV.W.0069.000000T0000Z-110716T1700Z/
GRIGGS ND-NELSON ND-
1122 AM CDT SAT JUL 16 2011

...THE SEVERE THUNDERSTORM WARNING FOR SOUTHEASTERN NELSON COUNTY IN
NORTHEAST NORTH DAKOTA...AND NORTHEASTERN GRIGGS COUNTY IN SOUTHEAST
NORTH DAKOTA IS CANCELLED...

THE STORM WHICH PROMPTED THE WARNING HAS MOVED OUT OF THE WARNED 
AREA.

LAT...LON 4767 9788 4779 9788 4787 9703 4744 9689
      4746 9788 4767 9789
TIME...MOT...LOC 1621Z 267DEG 42KT 4765 9761

$$

NDC035-091-097-161700-
/O.CON.KFGF.SV.W.0069.000000T0000Z-110716T1700Z/
GRAND FORKS ND-STEELE ND-TRAILL ND-
1122 AM CDT SAT JUL 16 2011

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT FOR SOUTHERN GRAND
FORKS COUNTY IN NORTHEAST NORTH DAKOTA...AND NORTHERN TRAILL AND
NORTHERN STEELE COUNTIES IN SOUTHEAST NORTH DAKOTA UNTIL NOON CDT...

AT 1119 AM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
SEVERE THUNDERSTORM CAPABLE OF PRODUCING DAMAGING WINDS IN EXCESS OF
70 MPH.  THE STORM WAS LOCATED 5 MILES NORTH OF GOLDEN LAKE...OR 32
MILES SOUTHWEST OF GRAND FORKS...MOVING TO THE EAST AT 50 MPH. PENNY
SIZE HAIL MAY ALSO ACCOMPANY THESE DAMAGING WINDS.

THE SEVERE THUNDERSTORM WILL BE NEAR...
  HATTON AROUND 1130 AM CDT.
  PORTLAND AND MAYVILLE AROUND 1135 AM CDT.
  HOLMES AROUND 1140 AM CDT.
  THOMPSON...REYNOLDS AND CUMMINGS AROUND 1150 AM CDT.

THEREAFTER SOME OTHER LOCATIONS IMPACTED BY THE SEVERE THUNDERSTORM
INCLUDE BUXTON.

FOR MOTORISTS ON INTERSTATE 29...THE SEVERE THUNDERSTORM WILL BE
BETWEEN...MILE MARKER 113 AROUND 1150 AM CDT...AND MILE MARKER 131
AROUND 1155 AM CDT...

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

LAT...LON 4767 9788 4779 9788 4787 9703 4744 9689
      4746 9788 4767 9789
TIME...MOT...LOC 1621Z 267DEG 42KT 4765 9761

$$

JK

117 
WWUS53 KFGF 161644
SVSFGF

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE EASTERN ND/GRAND FORKS ND
1144 AM CDT SAT JUL 16 2011

NDC035-091-097-161700-
/O.CON.KFGF.SV.W.0069.000000T0000Z-110716T1700Z/
GRAND FORKS ND-STEELE ND-TRAILL ND-
1144 AM CDT SAT JUL 16 2011

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT FOR SOUTHEASTERN
GRAND FORKS COUNTY IN NORTHEAST NORTH DAKOTA...AND NORTHERN TRAILL
AND NORTHEASTERN STEELE COUNTIES IN SOUTHEAST NORTH DAKOTA UNTIL NOON
CDT...

AT 1142 AM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
SEVERE THUNDERSTORM CAPABLE OF PRODUCING DAMAGING WINDS IN EXCESS OF
70 MPH.  THE STORM WAS LOCATED 3 MILES NORTH OF HATTON...OR 24 MILES
SOUTHWEST OF GRAND FORKS...MOVING TO THE EAST AT 30 MPH. PENNY SIZE
HAIL MAY ALSO ACCOMPANY THESE DAMAGING WINDS.

THE SEVERE THUNDERSTORM WILL BE NEAR...
  HOLMES AROUND 1150 AM CDT.
  THOMPSON...REYNOLDS AND CUMMINGS AROUND NOON CDT.

THEREAFTER SOME OTHER LOCATIONS IMPACTED BY THE SEVERE THUNDERSTORM
INCLUDE BUXTON.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

LAT...LON 4746 9746 4768 9760 4781 9765 4787 9703
      4744 9689
TIME...MOT...LOC 1643Z 265DEG 28KT 4768 9738

$$

JK

The office that day

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

Issued	Product	Office	Counties	Lasted
Jul 16, 4:11 AM CDT	Heat Advisory	FGF	Benson, Cavalier, Pembina, Ramsey, Towner, Walsh	4 days
Jul 16, 6:49 AM CDT	Dense Fog Advisory	FGF	Barnes, Cass, Grand Forks, Griggs, Pembina, Ransom and 5 more	3 hr
Jul 16, 11:56 AM CDT	Severe Thunderstorm Warning	FGF	Grand Forks, Traill	39 min

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.