Alert archive / North Dakota / Severe Thunderstorm Warnings in 2012

Severe Thunderstorm Warning 92, NWS Grand Forks, ND

July 24, 2012Barnes County, Cass County, Ransom County, North Dakota

NWS Grand Forks, ND issued this severe thunderstorm warning at Jul 24, 2012, 10:20 PM CDT for Barnes County, Cass County, Ransom County, North Dakota. It was in force for 55 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 24, 2012, 10:20 PM CDT (03:20 UTC)
Expired: Jul 24, 2012, 11:15 PM CDT
In force: 55 min
Issued by: NWS Grand Forks, ND
Area: Storm-based polygon
Hail: 1.0 in
Wind: 60.0 mph

Counties Barnes County, ND, Cass County, ND, Ransom County, ND

The radar

The Fargo/Grand Forks radar (KMVX), 103 km from the middle of the area, began a volume at 03:23 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 24, 11:10 PM CDT	HAIL 1.25	3 Sw Kathryn, ND	HAIL FROM PENNY TO WALNUT SIZED FELL ALONG WITH VERY HEAVY RAINS ACROSS SOUTHERN OAK HILL TOWNSHIP. SOME SMALLER HAIL HAD FALLEN ROUGHLY A HALF HOUR EARLIER.

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 24, 9:08 PM CDT	Severe Thunderstorm Watch	SPC	7 hr

The nearest sounding before it

Aberdeen, SD (KABR), launched 00:00Z, 3.3 hours before the alert went out and 203 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: 2782 J/kg
Mixed-layer CIN: -204 J/kg
Mixed-layer LCL: 1161 m above ground
0-6 km bulk shear: 39 kt
0-1 km storm-relative helicity: 293 m²/s²
0-3 km storm-relative helicity: 367 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 5.6

Open this sounding in Storm Lab

The text

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

412 
WUUS53 KFGF 250320
SVRFGF
NDC003-017-073-250415-
/O.NEW.KFGF.SV.W.0092.120725T0320Z-120725T0415Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE EASTERN ND/GRAND FORKS ND
1020 PM CDT TUE JUL 24 2012

THE NATIONAL WEATHER SERVICE IN GRAND FORKS HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  SOUTHEASTERN BARNES COUNTY IN SOUTHEAST NORTH DAKOTA...
  SOUTHWESTERN CASS COUNTY IN SOUTHEAST NORTH DAKOTA...
  NORTHWESTERN RANSOM COUNTY IN SOUTHEAST NORTH DAKOTA...

* UNTIL 1115 PM CDT

* AT 1018 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
  SOUTHWEST OF LITTLE YELLOWSTONE STATE...OR 23 MILES SOUTH OF VALLEY
  CITY...MOVING TO THE NORTHEAST AT 20 MPH.

* THE SEVERE THUNDERSTORM WILL BE NEAR...
  LITTLE YELLOWSTONE STATE AROUND 1035 PM CDT.
  KATHRYN AROUND 1040 PM CDT.
  NOME AROUND 1055 PM CDT.
  VALLEY CITY AND FINGAL AROUND 1105 PM CDT.

THEREAFTER SOME OTHER LOCATIONS IMPACTED BY THE SEVERE THUNDERSTORM
INCLUDE LUCCA AND WHEATLAND.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

LAT...LON 4650 9805 4663 9805 4663 9845 4715 9788
      4700 9709 4646 9791
TIME...MOT...LOC 0321Z 230DEG 19KT 4660 9805
WIND...HAIL 60MPH 1.00IN

$$

TG

1 follow-up statement

381 
WWUS53 KFGF 250345
SVSFGF

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE EASTERN ND/GRAND FORKS ND
1045 PM CDT TUE JUL 24 2012

NDC003-017-073-250415-
/O.CON.KFGF.SV.W.0092.000000T0000Z-120725T0415Z/
BARNES ND-CASS ND-RANSOM ND-
1045 PM CDT TUE JUL 24 2012

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT FOR NORTHWESTERN
RANSOM...SOUTHWESTERN CASS AND SOUTHEASTERN BARNES COUNTIES IN
SOUTHEAST NORTH DAKOTA UNTIL 1115 PM CDT...

AT 1042 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 4 MILES NORTH OF MARION TO 4
MILES WEST OF ENDERLIN...MOVING TO THE NORTHEAST AT 15 MPH.

SEVERE THUNDERSTORMS WILL BE NEAR...
  NOME AND KATHRYN AROUND 1055 PM CDT.
  LUCCA AROUND 1110 PM CDT.
  VALLEY CITY...WHEATLAND AND TOWER CITY AROUND 1115 PM CDT.

THEREAFTER SOME OTHER LOCATIONS IMPACTED BY SEVERE THUNDERSTORMS
INCLUDE ORISKA...FINGAL...EMBDEN...BUFFALO...AYR AND AMENIA.

FOR MOTORISTS ON INTERSTATE 94...SEVERE THUNDERSTORMS WILL BE BETWEEN
NORTH DAKOTA MILE MARKER 286 AND NORTH DAKOTA MILE MARKER 328...

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

LAT...LON 4657 9798 4663 9805 4663 9845 4715 9788
      4700 9709 4652 9782
TIME...MOT...LOC 0346Z 222DEG 13KT 4667 9833 4664 9768
WIND...HAIL 60MPH 1.00IN

$$

TG

The office that day

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

Issued	Product	Office	Counties	Lasted
Jul 24, 8:25 PM CDT	Areal Flood Advisory	FGF	Benson, Ramsey	5 hr
Jul 24, 10:01 PM CDT	Severe Thunderstorm Warning	FGF	Cass, Ransom, Richland	59 min
Jul 24, 10:11 PM CDT	Special Weather Statement	FGF	Grand Forks, Nelson	64 min
Jul 24, 10:28 PM CDT	Severe Thunderstorm Warning	FGF	Grand Forks, Nelson	62 min
Jul 24, 10:59 PM CDT	Severe Thunderstorm Warning	FGF	Barnes, Cass, Ransom, Richland	61 min
Jul 24, 11:28 PM CDT	Severe Thunderstorm Warning	FGF	Grand Forks, Traill	62 min
Jul 25, 12:01 AM CDT	Areal Flood Advisory	FGF	Barnes, Cass, Ransom, Richland	10 hr
Jul 25, 12:20 AM CDT	Areal Flood Advisory	FGF	Grand Forks, Traill	3 hr

Nearby

Severe Thunderstorm Warnings in North Dakota, 2012 Every severe thunderstorm warning in 2012

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.