Alert archive / North Dakota / Tornado Warnings in 2007

Tornado Warning 29, NWS Grand Forks, ND

July 15, 2007Ransom County, Richland County, Sargent County, North Dakota

NWS Grand Forks, ND issued this tornado warning at Jul 15, 2007, 10:12 PM CDT for Ransom County, Richland County, Sargent County, North Dakota. It was in force for 48 min. 3 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 15, 2007, 10:12 PM CDT (03:12 UTC)
Expired
Jul 15, 2007, 11:00 PM CDT
In force
48 min
Issued by
NWS Grand Forks, ND
Area
Counties, with a storm outline in the text

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

The radar

The Aberdeen radar (KABR), 120 km from the middle of the area, began a volume at 03:12 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

TimeReportWhereRemark
Jul 15, 10:15 PM CDTTSTM WND DMG14 Se Lisbon, NDLARGE TREE LIMBS BROKEN DOWN IN SHELTER BELTS. A FEW MARBLE TO NICKEL SIZED HAIL.
Jul 15, 10:20 PM CDTTSTM WND DMGMilnor, NDNUMEROUS LARGE BRANCHES BROKEN DOWN.
Jul 15, 10:36 PM CDTTSTM WND DMGCayuga, ND8 INCH BRANCHES DOWN.

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.

IssuedProductOfficeLasted
Jul 15, 5:49 PM CDTSevere Thunderstorm WatchSPC6 hr

The nearest sounding before it

Aberdeen, SD (KABR), launched 00:00Z, 3.2 hours before the alert went out and 170 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 2007-07-16Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 0 joules per kilogram.LCL10008507005003002001001 km2 km3 km6 km9 km12 km15 km-30°-20°-10°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Aberdeen, SD at 00:00Z on 2007-07-16The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 30 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
0 J/kg
Mixed-layer CIN
No buoyant parcel
Mixed-layer LCL
2083 m above ground
0-6 km bulk shear
45 kt
0-1 km storm-relative helicity
30 m²/s²
0-3 km storm-relative helicity
160 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.

000 
WFUS53 KFGF 160312
TORFGF
NDC073-077-081-160400-
/O.NEW.KFGF.TO.W.0029.070716T0312Z-070716T0400Z/

BULLETIN - EAS ACTIVATION REQUESTED
TORNADO WARNING
NATIONAL WEATHER SERVICE EASTERN ND/GRAND FORKS ND
1012 PM CDT SUN JUL 15 2007

THE NATIONAL WEATHER SERVICE IN GRAND FORKS HAS ISSUED A

* TORNADO WARNING FOR...
  SOUTHEASTERN RANSOM COUNTY IN SOUTHEAST NORTH DAKOTA...
  SOUTHWESTERN RICHLAND COUNTY IN SOUTHEAST NORTH DAKOTA...
  EASTERN SARGENT COUNTY IN SOUTHEAST NORTH DAKOTA...

* UNTIL 1100 PM CDT

* AT 1004 PM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
  SEVERE THUNDERSTORM CAPABLE OF PRODUCING A TORNADO 5 MILES
  NORTHWEST OF DE LAMERE...OR 37 MILES WEST OF WAHPETON...MOVING TO
  THE SOUTH AT 50 MPH.

* THE TORNADO WILL BE NEAR...
  HAMLIN AT 1020 PM CDT...
  GENESEO AT 1025 PM CDT...

IF YOU ARE IN THE PATH OF THIS TORNADO ABANDON CARS AND MOBILE HOMES
FOR A STURDY BUILDING.

A SEVERE THUNDERSTORM WATCH REMAINS IN EFFECT UNTIL 100 AM CDT MONDAY
MORNING FOR NORTHWESTERN MINNESOTA.

LAT...LON 4645 9730 4635 9752 4595 9744 4595 9711

$$

JK
2 follow-up statements
000 
WWUS53 KFGF 160335
SVSFGF

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE EASTERN ND/GRAND FORKS ND
1035 PM CDT SUN JUL 15 2007

NDC073-077-081-160400-
/O.CON.KFGF.TO.W.0029.000000T0000Z-070716T0400Z/
RANSOM ND-RICHLAND ND-SARGENT ND-
1035 PM CDT SUN JUL 15 2007

...A TORNADO WARNING REMAINS IN EFFECT UNTIL 1100 PM CDT FOR EXTREME
SOUTHEASTERN RANSOM...SOUTHWESTERN RICHLAND AND EASTERN SARGENT
COUNTIES...

AT 1029 PM CDT...WEATHER SERVICE DOPPLER RADAR INDICATED A SEVERE
THUNDERSTORM CAPABLE OF PRODUCING A TORNADO. THE TORNADO WAS LOCATED
NEAR GENESEO...OR 36 MILES SOUTHWEST OF WAHPETON...MOVING TO THE
SOUTH AT 50 MPH.

IF YOU ARE IN THE PATH OF THIS TORNADO ABANDON CARS AND MOBILE HOMES
FOR A STURDY BUILDING.

A SEVERE THUNDERSTORM WATCH REMAINS IN EFFECT UNTIL 100 AM CDT MONDAY
MORNING FOR NORTHWESTERN MINNESOTA.

LAT...LON 4629 9729 4631 9748 4595 9744 4595 9711

$$

JK
000 
WWUS53 KFGF 160354
SVSFGF

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE EASTERN ND/GRAND FORKS ND
1054 PM CDT SUN JUL 15 2007

NDC073-077-081-160404-
/O.EXP.KFGF.TO.W.0029.000000T0000Z-070716T0400Z/
RANSOM ND-RICHLAND ND-SARGENT ND-
1054 PM CDT SUN JUL 15 2007

...THE TORNADO WARNING FOR EXTREME SOUTHEASTERN RANSOM...SOUTHWESTERN
RICHLAND AND EASTERN SARGENT COUNTIES WILL EXPIRE AT 1100 PM CDT...

AT 1054 PM CDT...THE THUNDERSTORM CAPABLE OF PRODUCING A TORNADO HAS 
MOVED OUT OF EXTREME SOUTHEASTERN RANSOM...SOUTHWESTERN RICHLAND AND 
EASTERN SARGENT COUNTIES. SO THE WARNING WILL BE ALLOWED TO EXPIRE 
AT 1100 PM CDT.

A SEVERE THUNDERSTORM WATCH REMAINS IN EFFECT UNTIL 100 AM CDT MONDAY
MORNING FOR NORTHWESTERN MINNESOTA.

LAT...LON 4629 9729 4631 9748 4595 9744 4595 9711

$$

JK

The office that day

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

IssuedProductOfficeCountiesLasted
Jul 15, 7:20 PM CDTTornado WarningFGFCass, Ransom40 min
Jul 15, 7:29 PM CDTSevere Thunderstorm WarningFGFRamsey, Towner61 min
Jul 15, 7:58 PM CDTTornado WarningFGFRansom, Richland23 min
Jul 15, 8:26 PM CDTSevere Thunderstorm WarningFGFBenson, Eddy49 min
Jul 15, 8:40 PM CDTSevere Thunderstorm WarningFGFBarnes, Cass, Steele65 min
Jul 15, 8:45 PM CDTSevere Thunderstorm WarningFGFCass, Traill60 min
Jul 15, 9:29 PM CDTTornado WarningFGFCass31 min
Jul 15, 9:49 PM CDTTornado WarningFGFRansom26 min

Nearby

Tornado Warnings in North Dakota, 2007Every tornado warning in 2007Tornadoes in 2007

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.