Alert archive / North Dakota / Severe Thunderstorm Warnings in 2012

Severe Thunderstorm Warning 78, NWS Grand Forks, ND

July 19, 2012Nelson County, Ramsey County, Walsh County, North Dakota

NWS Grand Forks, ND issued this severe thunderstorm warning at Jul 19, 2012, 3:49 PM CDT for Nelson County, Ramsey County, Walsh County, North Dakota. It was in force for 27 min. 2 reports 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 19, 2012, 3:49 PM CDT (20:49 UTC)
Expired: Jul 19, 2012, 4:16 PM CDT
In force: 27 min
Issued by: NWS Grand Forks, ND
Area: Storm-based polygon
Hail: 1.0 in
Wind: 60.0 mph

Counties Nelson County, ND, Ramsey County, ND, Walsh County, ND

The radar

The Fargo/Grand Forks radar (KMVX), 141 km from the middle of the area, began a volume at 20:49 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 19, 3:55 PM CDT	TSTM WND DMG	Starkweather, ND	SEVERAL LARGE TREES...UP TO 2FT DIASMETER...WERE BROKEN DOWN. WIDESPREAD TREE AND ROOF DAMAGE.
Jul 19, 4:10 PM CDT	TSTM WND DMG	5 Se Starkweather, ND	VERY STRONG WINDS OCCURRED BETWEEN 400 AND 410 PM CDT ACROSS CENTRAL SULLIVAN TOWNSHIP... ACCOMPANIED WITH PEA SIZED HAIL AND 0.40 INCHES OF RAIN. SOME AREA CROPS WERE FLATTENED.

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 19, 3:48 PM CDT	Severe Thunderstorm Watch	SPC	7 hr

The nearest sounding before it

Bismarck Municip, ND (KBIS), launched 12:00Z, 8.8 hours before the alert went out and 234 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: 1864 J/kg
Mixed-layer CIN: -264 J/kg
Mixed-layer LCL: 1973 m above ground
0-6 km bulk shear: 26 kt
0-1 km storm-relative helicity: 129 m²/s²
0-3 km storm-relative helicity: 114 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

Open this sounding in Storm Lab

The text

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

523 
WUUS53 KFGF 192049
SVRFGF
NDC063-071-099-192145-
/O.NEW.KFGF.SV.W.0078.120719T2049Z-120719T2145Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE EASTERN ND/GRAND FORKS ND
349 PM CDT THU JUL 19 2012

THE NATIONAL WEATHER SERVICE IN GRAND FORKS HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  NORTHWESTERN NELSON COUNTY IN NORTHEAST NORTH DAKOTA...
  RAMSEY COUNTY IN NORTHEAST NORTH DAKOTA...
  SOUTHWESTERN WALSH COUNTY IN NORTHEAST NORTH DAKOTA...

* UNTIL 445 PM CDT

* AT 344 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 3 MILES
  NORTHEAST OF STARKWEATHER...OR 25 MILES NORTH OF DEVILS LAKE...
  MOVING TO THE SOUTHEAST AT 30 MPH.

* THE SEVERE THUNDERSTORM WILL BE NEAR...
  DERRICK AROUND 400 PM CDT.
  EDMORE AROUND 415 PM CDT.
  SOUTHAM AND LAWTON AROUND 430 PM CDT.
  BROCKET AROUND 440 PM CDT.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

LAT...LON 4854 9885 4854 9866 4825 9817 4804 9850
      4839 9897 4844 9897
TIME...MOT...LOC 2049Z 310DEG 26KT 4845 9877
WIND...HAIL 60MPH 1.00IN

$$
SPEICHER

1 follow-up statement

316 
WWUS53 KFGF 192116
SVSFGF

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE EASTERN ND/GRAND FORKS ND
416 PM CDT THU JUL 19 2012

NDC063-071-099-192126-
/O.CAN.KFGF.SV.W.0078.000000T0000Z-120719T2145Z/
NELSON ND-RAMSEY ND-WALSH ND-
416 PM CDT THU JUL 19 2012

...THE SEVERE THUNDERSTORM WARNING FOR SOUTHWESTERN WALSH...RAMSEY
AND NORTHWESTERN NELSON COUNTIES IN NORTHEAST NORTH DAKOTA IS
CANCELLED...

THE STORM WHICH PROMPTED THE WARNING HAS WEAKENED BELOW SEVERE
LIMITS...AND NO LONGER POSES AN IMMEDIATE THREAT TO LIFE OR PROPERTY.

LAT...LON 4854 9885 4854 9866 4825 9817 4804 9850
      4839 9897 4844 9897
TIME...MOT...LOC 2116Z 310DEG 26KT 4831 9856

$$
SPEICHER

The office that day

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

Issued	Product	Office	Counties	Lasted
Jul 19, 2:26 PM CDT	Special Weather Statement	FGF	Cavalier, Towner	64 min
Jul 19, 5:25 PM CDT	Special Weather Statement	FGF	Grand Forks	65 min
Jul 19, 5:43 PM CDT	Severe Thunderstorm Warning	FGF	Grand Forks	62 min
Jul 19, 6:23 PM CDT	Severe Thunderstorm Warning	FGF	Grand Forks, Steele, Traill	52 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.