Alert archive / North Dakota / Severe Thunderstorm Warnings in 2011

Severe Thunderstorm Warning 3, NWS Grand Forks, ND

May 10, 2011Ransom County, Sargent County, North Dakota

NWS Grand Forks, ND issued this severe thunderstorm warning at May 10, 2011, 12:44 AM CDT for Ransom County, Sargent County, North Dakota. It was in force for 61 min. No storm report in the archive falls inside the area while it was in force.

The area

The outline as issued.

The facts

Issued: May 10, 2011, 12:44 AM CDT (05:44 UTC)
Expired: May 10, 2011, 1:45 AM CDT
In force: 61 min
Issued by: NWS Grand Forks, ND
Area: Storm-based polygon
Hail: 1.0 in
Wind: 60.0 mph

Counties Ransom County, ND, Sargent County, ND

The radar

The Aberdeen radar (KABR), 103 km from the middle of the area, began a volume at 05:47 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.

The nearest sounding before it

Aberdeen, SD (KABR), launched 00:00Z, 5.7 hours before the alert went out and 161 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: 706 J/kg
Mixed-layer CIN: -236 J/kg
Mixed-layer LCL: 724 m above ground
0-6 km bulk shear: 33 kt
0-1 km storm-relative helicity: 82 m²/s²
0-3 km storm-relative helicity: 81 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.1

Open this sounding in Storm Lab

The text

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

471 
WUUS53 KFGF 100544
SVRFGF
NDC073-081-100645-
/O.NEW.KFGF.SV.W.0003.110510T0544Z-110510T0645Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE EASTERN ND/GRAND FORKS ND
1244 AM CDT TUE MAY 10 2011

THE NATIONAL WEATHER SERVICE IN GRAND FORKS HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  RANSOM COUNTY IN SOUTHEAST NORTH DAKOTA...
  NORTHERN SARGENT COUNTY IN SOUTHEAST NORTH DAKOTA...

* UNTIL 145 AM CDT

* AT 1243 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
  SOUTHEAST OF CRETE...OR 54 MILES SOUTH OF VALLEY CITY...MOVING TO
  THE NORTH AT 30 MPH.

* THE SEVERE THUNDERSTORM WILL BE NEAR...
  CRETE AROUND 1250 AM CDT.
  STIRUM AROUND 1255 AM CDT.
  GWINNER AROUND 100 AM CDT.
  MILNOR AROUND 105 AM CDT.

THEREAFTER SOME OTHER LOCATIONS IMPACTED BY THE SEVERE THUNDERSTORM
INCLUDE ENGLEVALE...LISBON...FORT RANSOM AND ENDERLIN.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

LAT...LON 4627 9802 4628 9804 4662 9804 4663 9747
      4603 9744 4602 9802
TIME...MOT...LOC 0544Z 189DEG 25KT 4616 9791
WIND...HAIL 60MPH 1.00IN

$$

BRAMER

4 follow-up statements

487 
WWUS53 KFGF 100559
SVSFGF

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE EASTERN ND/GRAND FORKS ND
1259 AM CDT TUE MAY 10 2011

NDC073-081-100645-
/O.CON.KFGF.SV.W.0003.000000T0000Z-110510T0645Z/
RANSOM ND-SARGENT ND-
1259 AM CDT TUE MAY 10 2011

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT FOR NORTHERN
SARGENT AND RANSOM COUNTIES IN SOUTHEAST NORTH DAKOTA UNTIL 145 AM
CDT...

AT 1257 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
NORTHWEST OF STIRUM...OR 48 MILES SOUTH OF VALLEY CITY...MOVING TO
THE NORTH AT 35 MPH.

THE SEVERE THUNDERSTORM WILL BE NEAR...
  MILNOR AROUND 110 AM CDT.
  ENGLEVALE AROUND 115 AM CDT.
  ELLIOTT AROUND 120 AM CDT.
  LISBON AROUND 125 AM CDT.

THEREAFTER SOME OTHER LOCATIONS IMPACTED BY THE SEVERE THUNDERSTORM
INCLUDE FORT RANSOM...ANSELM...ENDERLIN AND SHELDON.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

LAT...LON 4627 9802 4628 9804 4662 9804 4663 9747
      4603 9744 4602 9802
TIME...MOT...LOC 0559Z 197DEG 30KT 4625 9787

$$

BRAMER

513 
WWUS53 KFGF 100615
SVSFGF

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE EASTERN ND/GRAND FORKS ND
115 AM CDT TUE MAY 10 2011

NDC073-081-100645-
/O.CON.KFGF.SV.W.0003.000000T0000Z-110510T0645Z/
RANSOM ND-SARGENT ND-
115 AM CDT TUE MAY 10 2011

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT FOR NORTHWESTERN
SARGENT AND RANSOM COUNTIES IN SOUTHEAST NORTH DAKOTA UNTIL 145 AM
CDT...

AT 111 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 5 MILES
SOUTH OF ELLIOTT...OR 42 MILES SOUTH OF VALLEY CITY...MOVING TO THE
NORTHEAST AT 35 MPH.

THE SEVERE THUNDERSTORM WILL BE NEAR...
  ELLIOTT AROUND 120 AM CDT.
  LISBON AND FORT RANSOM AROUND 130 AM CDT.
  ENDERLIN...SHELDON AND ANSELM AROUND 145 AM CDT.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

LAT...LON 4623 9746 4622 9801 4627 9802 4628 9804
      4662 9804 4663 9747
TIME...MOT...LOC 0615Z 203DEG 29KT 4635 9781

$$

BRAMER

924 
WWUS53 KFGF 100631
SVSFGF

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE EASTERN ND/GRAND FORKS ND
131 AM CDT TUE MAY 10 2011

NDC081-100641-
/O.CAN.KFGF.SV.W.0003.000000T0000Z-110510T0645Z/
SARGENT ND-
131 AM CDT TUE MAY 10 2011

...THE SEVERE THUNDERSTORM WARNING FOR NORTHWESTERN SARGENT COUNTY IN
SOUTHEAST NORTH DAKOTA IS CANCELLED...

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

LAT...LON 4634 9747 4634 9800 4635 9804 4662 9804
      4663 9747
TIME...MOT...LOC 0631Z 203DEG 29KT 4647 9774

$$

NDC073-100645-
/O.CON.KFGF.SV.W.0003.000000T0000Z-110510T0645Z/
RANSOM ND-
131 AM CDT TUE MAY 10 2011

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT FOR RANSOM COUNTY
IN SOUTHEAST NORTH DAKOTA UNTIL 145 AM CDT...

AT 130 AM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
SEVERE THUNDERSTORM CAPABLE OF PRODUCING QUARTER SIZE HAIL.  THE
STORM WAS LOCATED 3 MILES NORTHWEST OF LISBON...OR 34 MILES SOUTH OF
VALLEY CITY...MOVING TO THE NORTHEAST AT 35 MPH.

THE SEVERE THUNDERSTORM WILL BE NEAR...
  ENDERLIN...SHELDON AND ANSELM AROUND 145 AM CDT.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

LAT...LON 4634 9747 4634 9800 4635 9804 4662 9804
      4663 9747
TIME...MOT...LOC 0631Z 203DEG 29KT 4647 9774

$$

BRAMER

391 
WWUS53 KFGF 100645
SVSFGF

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE EASTERN ND/GRAND FORKS ND
145 AM CDT TUE MAY 10 2011

NDC073-100654-
/O.CAN.KFGF.SV.W.0003.000000T0000Z-110510T0645Z/
RANSOM ND-
145 AM CDT TUE MAY 10 2011

...THE SEVERE THUNDERSTORM WARNING FOR RANSOM COUNTY IN SOUTHEAST
NORTH DAKOTA IS CANCELLED...

THE STORM WHICH PROMPTED THE WARNING HAS WEAKENED ACROSS THE WARNED 
AREA. HAIL TO NICKEL SIZE IS STILL POSSIBLE WITH THIS THUNDERSTORM.

LAT...LON 4634 9747 4634 9800 4635 9804 4662 9804
      4663 9747
TIME...MOT...LOC 0644Z 203DEG 29KT 4657 9768

$$

BRAMER

The office that day

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

Issued	Product	Office	Counties	Lasted
May 10, 12:01 AM CDT	Severe Thunderstorm Warning	FGF	Ransom, Sargent	44 min
May 10, 2:25 AM CDT	Severe Thunderstorm Warning	FGF	Cass	48 min
May 10, 2:43 AM CDT	Severe Thunderstorm Warning	FGF	Cass	62 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; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.