Alert archive / North Dakota / Severe Thunderstorm Warnings in 2012

Severe Thunderstorm Warning 86, NWS Grand Forks, ND

July 22, 2012Ransom County, Sargent County, North Dakota

NWS Grand Forks, ND issued this severe thunderstorm warning at Jul 22, 2012, 6:14 PM CDT for Ransom County, Sargent County, North Dakota. It was in force for 61 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 22, 2012, 6:14 PM CDT (23:14 UTC)
Expired: Jul 22, 2012, 7:15 PM CDT
In force: 61 min
Issued by: NWS Grand Forks, ND
Area: Storm-based polygon
Hail: 1.5 in
Wind: 50.0 mph

Counties Ransom County, ND, Sargent County, ND

The radar

The Aberdeen radar (KABR), 104 km from the middle of the area, began a volume at 23:16 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 22, 6:35 PM CDT	HAIL 1	7 Sw Englevale, ND

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 22, 3:25 PM CDT	Severe Thunderstorm Watch	SPC	6 hr

The nearest sounding before it

Aberdeen, SD (KABR), launched 12:00Z, 11.2 hours before the alert went out and 160 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: 2180 J/kg
Mixed-layer CIN: -207 J/kg
Mixed-layer LCL: 1248 m above ground
0-6 km bulk shear: 31 kt
0-1 km storm-relative helicity: 5 m²/s²
0-3 km storm-relative helicity: 33 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.

922 
WUUS53 KFGF 222314
SVRFGF
NDC073-081-230015-
/O.NEW.KFGF.SV.W.0086.120722T2314Z-120723T0015Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE EASTERN ND/GRAND FORKS ND
614 PM CDT SUN JUL 22 2012

THE NATIONAL WEATHER SERVICE IN GRAND FORKS HAS ISSUED A

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

* UNTIL 715 PM CDT

* AT 612 PM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
  SEVERE THUNDERSTORM CAPABLE OF PRODUCING PING PONG BALL SIZE HAIL.
  THE STORM WAS LOCATED 3 MILES SOUTH OF VERONA...OR 41 MILES SOUTH
  OF VALLEY CITY...MOVING TO THE EAST AT 20 MPH.

* THE SEVERE THUNDERSTORM WILL BE NEAR...
  ENGLEVALE AROUND 630 PM CDT.
  CRETE AROUND 635 PM CDT.
  ELLIOTT AROUND 645 PM CDT.
  STIRUM AROUND 655 PM CDT.

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

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

LAT...LON 4634 9741 4605 9753 4617 9800 4629 9800
      4629 9803 4644 9803
TIME...MOT...LOC 2314Z 285DEG 18KT 4633 9807
WIND...HAIL <50MPH 1.50IN

$$

VG

3 follow-up statements

585 
WWUS53 KFGF 222335
SVSFGF

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE EASTERN ND/GRAND FORKS ND
635 PM CDT SUN JUL 22 2012

NDC073-081-230015-
/O.CON.KFGF.SV.W.0086.000000T0000Z-120723T0015Z/
RANSOM ND-SARGENT ND-
635 PM CDT SUN JUL 22 2012

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT FOR NORTHWESTERN
SARGENT AND SOUTHWESTERN RANSOM COUNTIES IN SOUTHEAST NORTH DAKOTA
UNTIL 715 PM CDT...

AT 630 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
SOUTH OF ENGLEVALE...OR 42 MILES SOUTH OF VALLEY CITY...MOVING TO THE
EAST AT 20 MPH.

THE SEVERE THUNDERSTORM WILL BE NEAR...
  ELLIOTT AROUND 645 PM CDT.
  STIRUM AROUND 655 PM CDT.
  MILNOR...FORMAN AND GWINNER AROUND 715 PM CDT.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

LAT...LON 4634 9741 4605 9753 4617 9800 4629 9800
      4629 9803 4644 9803
TIME...MOT...LOC 2335Z 285DEG 18KT 4630 9792
WIND...HAIL 60MPH 1.00IN

$$

VG

899 
WWUS53 KFGF 222349
SVSFGF

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE EASTERN ND/GRAND FORKS ND
649 PM CDT SUN JUL 22 2012

NDC073-081-230015-
/O.CON.KFGF.SV.W.0086.000000T0000Z-120723T0015Z/
RANSOM ND-SARGENT ND-
649 PM CDT SUN JUL 22 2012

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT FOR NORTHWESTERN
SARGENT AND SOUTH CENTRAL RANSOM COUNTIES IN SOUTHEAST NORTH DAKOTA
UNTIL 715 PM CDT...

AT 644 PM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
SEVERE THUNDERSTORM CAPABLE OF PRODUCING QUARTER SIZE HAIL.  THE
STORM WAS LOCATED 3 MILES SOUTHWEST OF STIRUM...OR 51 MILES SOUTH OF
VALLEY CITY...MOVING TO THE EAST AT 20 MPH.

THE SEVERE THUNDERSTORM WILL BE NEAR...
  GWINNER AROUND 710 PM CDT.
  MILNOR AND FORMAN AROUND 715 PM CDT.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

LAT...LON 4639 9794 4634 9741 4605 9753 4617 9800
      4618 9800
TIME...MOT...LOC 2349Z 285DEG 18KT 4618 9782
WIND...HAIL <50MPH 1.00IN

$$

VG

686 
WWUS53 KFGF 230006
SVSFGF

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE EASTERN ND/GRAND FORKS ND
706 PM CDT SUN JUL 22 2012

NDC073-081-230017-
/O.EXP.KFGF.SV.W.0086.000000T0000Z-120723T0015Z/
RANSOM ND-SARGENT ND-
706 PM CDT SUN JUL 22 2012

...THE SEVERE THUNDERSTORM WARNING FOR NORTHWESTERN SARGENT AND SOUTH
CENTRAL RANSOM COUNTIES IN SOUTHEAST NORTH DAKOTA WILL EXPIRE AT 715
PM CDT...

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

LAT...LON 4639 9794 4634 9741 4605 9753 4617 9800
      4618 9800
TIME...MOT...LOC 0007Z 285DEG 18KT 4616 9769

$$
VG

The office that day

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

Issued	Product	Office	Counties	Lasted
Jul 22, 5:37 PM CDT	Special Weather Statement	FGF	Ransom	38 min
Jul 22, 5:48 PM CDT	Severe Thunderstorm Warning	FGF	Ransom, Richland	42 min
Jul 22, 6:42 PM CDT	Severe Thunderstorm Warning	FGF	Cass, Richland	34 min

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.