Alert archive / North Dakota / Severe Thunderstorm Warnings in 2011

Severe Thunderstorm Warning 2, 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, 12:01 AM CDT for Ransom County, Sargent County, North Dakota. It was in force for 44 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, 12:01 AM CDT (05:01 UTC)
Expired
May 10, 2011, 12:45 AM CDT
In force
44 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), 96 km from the middle of the area, began a volume at 05:02 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, 5.0 hours before the alert went out and 153 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-pSkew-T log-p diagram, Aberdeen, SD at 00:00Z on 2011-05-10Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 706 joules per kilogram.LCLLFCEL10008507005003002001001 km2 km3 km6 km9 km12 km15 km-30°-20°-10°0°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Aberdeen, SD at 00:00Z on 2011-05-10The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 82 square meters per square second.193958Sfc1 km3 km6 km9 kmRMLM
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.

792 
WUUS53 KFGF 100501
SVRFGF
NDC073-081-100545-
/O.NEW.KFGF.SV.W.0002.110510T0501Z-110510T0545Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE EASTERN ND/GRAND FORKS ND
1201 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...
  SARGENT COUNTY IN SOUTHEAST NORTH DAKOTA...

* UNTIL 1245 AM CDT

* AT 1157 PM 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
  SOUTHEAST OF HECLA...OR 75 MILES EAST OF EUREKA...MOVING TO THE
  NORTH AT 35 MPH.

* THE SEVERE THUNDERSTORM WILL BE NEAR...
  HAVANA AND BRAMPTON AROUND 1220 AM CDT.
  STRAUBVILLE AROUND 1225 AM CDT.
  FORMAN...RUTLAND AND COGSWELL AROUND 1235 AM CDT.
  CRETE AROUND 1240 AM CDT.

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

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

LAT...LON 4593 9802 4627 9802 4628 9804 4662 9804
      4663 9747 4592 9745
TIME...MOT...LOC 0501Z 189DEG 30KT 4584 9806
WIND...HAIL 60MPH 1.00IN

$$

BRAMER
1 follow-up statement
419 
WWUS53 KFGF 100522
SVSFGF

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE EASTERN ND/GRAND FORKS ND
1222 AM CDT TUE MAY 10 2011

NDC073-081-100545-
/O.CON.KFGF.SV.W.0002.000000T0000Z-110510T0545Z/
RANSOM ND-SARGENT ND-
1222 AM CDT TUE MAY 10 2011

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT FOR SARGENT AND
RANSOM COUNTIES IN SOUTHEAST NORTH DAKOTA UNTIL 1245 AM CDT...

AT 1220 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 3 MILES
SOUTHEAST OF STRAUBVILLE...OR 62 MILES WEST OF WAHPETON...MOVING TO
THE NORTH AT 35 MPH.

THE SEVERE THUNDERSTORM WILL BE NEAR...
  RUTLAND AND COGSWELL AROUND 1230 AM CDT.
  FORMAN AROUND 1235 AM CDT.
  STIRUM AND CRETE AROUND 1240 AM CDT.
  LISBON...GWINNER AND ENDERLIN AROUND 1245 AM CDT.

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

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

LAT...LON 4593 9802 4627 9802 4628 9804 4662 9804
      4663 9747 4592 9745
TIME...MOT...LOC 0522Z 189DEG 30KT 4603 9785

$$

BRAMER

The office that day

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

IssuedProductOfficeCountiesLasted
May 10, 12:44 AM CDTSevere Thunderstorm WarningFGFRansom, Sargent61 min
May 10, 2:25 AM CDTSevere Thunderstorm WarningFGFCass48 min
May 10, 2:43 AM CDTSevere Thunderstorm WarningFGFCass62 min

Nearby

Severe Thunderstorm Warnings in North Dakota, 2011Every 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.