Alert archive / North Dakota / Severe Thunderstorm Warnings in 2011

Severe Thunderstorm Warning 52, NWS Grand Forks, ND

July 4, 20114 counties in North Dakota

NWS Grand Forks, ND issued this severe thunderstorm warning at Jul 4, 2011, 10:26 PM CDT for 4 counties in North Dakota. It was in force for 64 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 4, 2011, 10:26 PM CDT (03:26 UTC)
Expired: Jul 4, 2011, 11:30 PM CDT
In force: 64 min
Issued by: NWS Grand Forks, ND
Area: Storm-based polygon
Hail: 1.0 in
Wind: 60.0 mph

Counties Cass County, ND, Ransom County, ND, Richland County, ND, Sargent County, ND

The radar

The Aberdeen radar (KABR), 115 km from the middle of the area, began a volume at 03:28 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 4, 10:30 PM CDT	HAIL 1	2 Ne Leonard, ND	A FEW DIME TO QUARTER SIZED HAIL IN BRIEF HEAVY RAIN.

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 4, 7:14 PM CDT	Severe Thunderstorm Watch	SPC	9 hr

The nearest sounding before it

Aberdeen, SD (KABR), launched 00:00Z, 3.4 hours before the alert went out and 167 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: 3256 J/kg
Mixed-layer CIN: -52 J/kg
Mixed-layer LCL: 1088 m above ground
0-6 km bulk shear: 30 kt
0-1 km storm-relative helicity: 94 m²/s²
0-3 km storm-relative helicity: 150 m²/s²
Significant tornado parameter: 1.3
Supercell composite: 9.4

Open this sounding in Storm Lab

The text

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

187 
WUUS53 KFGF 050326
SVRFGF
NDC017-073-077-081-050430-
/O.NEW.KFGF.SV.W.0052.110705T0326Z-110705T0430Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE EASTERN ND/GRAND FORKS ND
1026 PM CDT MON JUL 4 2011

THE NATIONAL WEATHER SERVICE IN GRAND FORKS HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  SOUTH CENTRAL CASS COUNTY IN SOUTHEAST NORTH DAKOTA...
  RANSOM COUNTY IN SOUTHEAST NORTH DAKOTA...
  RICHLAND COUNTY IN SOUTHEAST NORTH DAKOTA...
  SARGENT COUNTY IN SOUTHEAST NORTH DAKOTA...

* UNTIL 1130 PM CDT

* AT 1018 PM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
  LINE OF SEVERE THUNDERSTORMS CAPABLE OF PRODUCING QUARTER SIZE
  HAIL...AND DAMAGING WINDS IN EXCESS OF 60 MPH. THE STORMS WERE
  LOCATED ALONG A LINE EXTENDING FROM 2 MILES WEST OF DAVENPORT TO 3
  MILES WEST OF ENGLEVALE...MOVING TO THE SOUTHEAST AT 40 MPH.

* SEVERE THUNDERSTORMS WILL BE NEAR...
  CRETE AROUND 1035 PM CDT.
  WALCOTT AND STIRUM AROUND 1040 PM CDT.
  GWINNER AND MCLEOD AROUND 1045 PM CDT.
  MILNOR...COLFAX AND COGSWELL AROUND 1050 PM CDT.

THEREAFTER SOME OTHER LOCATIONS IMPACTED BY THE SEVERE THUNDERSTORMS
INCLUDE STRAUBVILLE...WYNDMERE...HAMLIN...RUTLAND...MANTADOR AND
WAHPETON.

FOR MOTORISTS ON INTERSTATE 29...SEVERE THUNDERSTORMS WILL BE
BETWEEN...MILE MARKERS 15 AND 42...

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

LAT...LON 4594 9797 4628 9803 4650 9803 4683 9707
      4630 9660 4625 9658 4594 9739
TIME...MOT...LOC 0326Z 323DEG 33KT 4666 9706 4634 9792
WIND...HAIL 60MPH 1.00IN

$$

HOPPES/EWENS

2 follow-up statements

745 
WWUS53 KFGF 050402
SVSFGF

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE EASTERN ND/GRAND FORKS ND
1102 PM CDT MON JUL 4 2011

NDC017-073-077-081-050430-
/O.CON.KFGF.SV.W.0052.000000T0000Z-110705T0430Z/
CASS ND-RANSOM ND-SARGENT ND-RICHLAND ND-
1102 PM CDT MON JUL 4 2011

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT FOR RICHLAND...
SARGENT...RANSOM AND SOUTHEASTERN CASS COUNTIES IN SOUTHEAST NORTH
DAKOTA UNTIL 1130 PM CDT...

AT 1059 PM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
LINE OF SEVERE THUNDERSTORMS CAPABLE OF PRODUCING QUARTER SIZE
HAIL...AND DAMAGING WINDS IN EXCESS OF 60 MPH.  THE STORMS WERE
LOCATED ALONG A LINE EXTENDING FROM 3 MILES WEST OF ABERCROMBIE TO 2
MILES SOUTH OF GWINNER TO NEAR CRETE...MOVING TO THE SOUTHEAST AT 30
MPH.

SEVERE THUNDERSTORMS WILL BE NEAR...
  WYNDMERE AND GALCHUTT AROUND 1110 PM CDT.
  FORMAN...COGSWELL AND BARNEY AROUND 1115 PM CDT.
  STRAUBVILLE...MOORETON AND HAMLIN AROUND 1120 PM CDT.
  RUTLAND...DWIGHT AND CAYUGA AROUND 1125 PM CDT.

THEREAFTER SOME OTHER LOCATIONS IMPACTED BY SEVERE THUNDERSTORMS
INCLUDE WAHPETON...LIDGERWOOD...STILES...MANTADOR...HAVANA AND
GENESEO.

FOR MOTORISTS ON INTERSTATE 29...SEVERE THUNDERSTORMS WILL BE
BETWEEN...MILE MARKERS 15 AND 33...

PRECAUTIONARY/PREPAREDNESS ACTIONS...

DAMAGING WINDS...LARGE HAIL...DEADLY LIGHTNING AND TORNADOES ARE ALL
POSSIBLE IN SEVERE THUNDERSTORMS. SEEK SHELTER IN A REINFORCED
BUILDING IMMEDIATELY.

&&

LAT...LON 4594 9797 4628 9803 4650 9803 4683 9707
      4630 9660 4625 9658 4594 9739
TIME...MOT...LOC 0402Z 321DEG 25KT 4645 9677 4618 9763
          4617 9793

$$

HOPPES/EWENS

927 
WWUS53 KFGF 050428
SVSFGF

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE EASTERN ND/GRAND FORKS ND
1128 PM CDT MON JUL 4 2011

NDC017-073-077-081-050438-
/O.EXP.KFGF.SV.W.0052.000000T0000Z-110705T0430Z/
CASS ND-RANSOM ND-SARGENT ND-RICHLAND ND-
1128 PM CDT MON JUL 4 2011

...THE SEVERE THUNDERSTORM WARNING FOR RICHLAND...SARGENT...RANSOM
AND SOUTHEASTERN CASS COUNTIES IN SOUTHEAST NORTH DAKOTA WILL EXPIRE
AT 1130 PM CDT...

THE LINE OF STORMS WHICH PROMPTED THE WARNING HAVE WEAKENED BELOW
SEVERE LIMITS...AND NO LONGER POSES AN IMMEDIATE THREAT TO LIFE OR
PROPERTY.

LAT...LON 4594 9797 4628 9803 4650 9803 4683 9707
      4630 9660 4625 9658 4594 9739
TIME...MOT...LOC 0428Z 321DEG 25KT 4631 9661 4604 9747
          4603 9777

$$

HOPPES/EWENS

The office that day

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

Issued	Product	Office	Counties	Lasted
Jul 4, 8:17 PM CDT	Severe Thunderstorm Warning	FGF	Traill	58 min
Jul 4, 9:12 PM CDT	Severe Thunderstorm Warning	FGF	Cass, Traill	63 min
Jul 4, 9:21 PM CDT	Tornado Warning	FGF	Cass, Traill	39 min
Jul 4, 9:40 PM CDT	Severe Thunderstorm Warning	FGF	Cass	65 min
Jul 4, 9:51 PM CDT	Tornado Warning	FGF	Cass	39 min
Jul 5, 4:06 AM CDT	Areal Flood Advisory	FGF	Richland, Sargent	8 hr
Jul 5, 4:24 AM CDT	Severe Thunderstorm Warning	FGF	Richland	22 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.