Alert archive / North Dakota / Tornado Warnings in 2013

Tornado Warning 18, NWS Grand Forks, ND

October 11, 2013Griggs County, Nelson County, Steele County, North Dakota

NWS Grand Forks, ND issued this tornado warning at Oct 11, 2013, 5:35 PM CDT for Griggs County, Nelson County, Steele County, North Dakota. It was in force for 25 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
Oct 11, 2013, 5:35 PM CDT (22:35 UTC)
Expired
Oct 11, 2013, 6:00 PM CDT
In force
25 min
Issued by
NWS Grand Forks, ND
Area
Storm-based polygon
Tornado
Radar indicated
Hail
0.0 in

Counties Griggs County, ND, Nelson County, ND, Steele County, ND

The radar

The Fargo/Grand Forks radar (KMVX), 61 km from the middle of the area, began a volume at 22:36 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
Oct 11, 5:40 PM CDTFUNNEL CLOUD3 Ne Cooperstown, NDBRIEF FUNNEL OBSERVED.

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
Oct 11, 12:16 PM CDTTornado WatchSPC8 hr

The nearest sounding before it

Bismarck Municip, ND (KBIS), launched 12:00Z, 10.6 hours before the alert went out and 222 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, Bismarck Municip, ND at 12:00Z on 2013-10-11Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 209 joules per kilogram.LCLLFCEL10008507005003002001001 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, Bismarck Municip, ND at 12:00Z on 2013-10-11The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 132 square meters per square second.1939587897Sfc1 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
209 J/kg
Mixed-layer CIN
-107 J/kg
Mixed-layer LCL
671 m above ground
0-6 km bulk shear
56 kt
0-1 km storm-relative helicity
132 m²/s²
0-3 km storm-relative helicity
134 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.

580 
WFUS53 KFGF 112235
TORFGF
NDC039-063-091-112300-
/O.NEW.KFGF.TO.W.0018.131011T2235Z-131011T2300Z/

BULLETIN - EAS ACTIVATION REQUESTED
TORNADO WARNING
NATIONAL WEATHER SERVICE EASTERN ND/GRAND FORKS ND
535 PM CDT FRI OCT 11 2013

THE NATIONAL WEATHER SERVICE IN GRAND FORKS HAS ISSUED A

* TORNADO WARNING FOR...
  NORTHEASTERN GRIGGS COUNTY IN SOUTHEAST NORTH DAKOTA...
  SOUTHEASTERN NELSON COUNTY IN NORTHEAST NORTH DAKOTA...
  NORTHWESTERN STEELE COUNTY IN SOUTHEAST NORTH DAKOTA...

* UNTIL 600 PM CDT

* AT 532 PM CDT...A SEVERE THUNDERSTORM CAPABLE OF PRODUCING A
  TORNADO WAS LOCATED NEAR COOPERSTOWN...AND MOVING NORTH AT 35 MPH.

  HAZARD...TORNADO.

  SOURCE...RADAR INDICATED ROTATION.

  IMPACT...SPORADIC DAMAGE TO MOBILE HOMES...ROOFS AND VEHICLES.

* THIS DANGEROUS STORM WILL BE NEAR...
  ANETA AROUND 555 PM CDT.
  KLOTEN AND MCVILLE AROUND 600 PM CDT.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

TO REPORT SEVERE WEATHER CONTACT YOUR NEAREST LAW ENFORCEMENT AGENCY.
THEY WILL SEND YOUR REPORT TO THE NATIONAL WEATHER SERVICE IN GRAND
FORKS.

&&

LAT...LON 4791 9824 4791 9790 4740 9792 4739 9820
TIME...MOT...LOC 2235Z 180DEG 44KT 4744 9807

TORNADO...RADAR INDICATED
HAIL...0.00IN

$$

VOELKER
2 follow-up statements
762 
WWUS53 KFGF 112249
SVSFGF

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE EASTERN ND/GRAND FORKS ND
549 PM CDT FRI OCT 11 2013

NDC039-063-091-112300-
/O.CON.KFGF.TO.W.0018.000000T0000Z-131011T2300Z/
GRIGGS ND-NELSON ND-STEELE ND-
549 PM CDT FRI OCT 11 2013

...A TORNADO WARNING REMAINS IN EFFECT FOR NORTHWESTERN STEELE...
SOUTHEASTERN NELSON AND NORTHEASTERN GRIGGS COUNTIES UNTIL 600 PM
CDT...

AT 546 PM CDT...A SEVERE THUNDERSTORM CAPABLE OF PRODUCING A TORNADO 
WAS LOCATED 8 MILES WEST OF SHARON...AND MOVING NORTH AT 40 MPH.

HAZARD...TORNADO.

SOURCE...RADAR INDICATED ROTATION.

IMPACT...SPORADIC DAMAGE TO MOBILE HOMES...ROOFS AND VEHICLES.

THIS DANGEROUS STORM WILL BE NEAR...
  ANETA AROUND 555 PM CDT.
  KLOTEN AND MCVILLE AROUND 600 PM CDT.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

TO REPORT SEVERE WEATHER CONTACT YOUR NEAREST LAW ENFORCEMENT AGENCY.
THEY WILL SEND YOUR REPORT TO THE NATIONAL WEATHER SERVICE IN GRAND
FORKS.

&&

LAT...LON 4791 9824 4791 9790 4750 9792 4750 9821
TIME...MOT...LOC 2248Z 180DEG 44KT 4760 9807

TORNADO...RADAR INDICATED
HAIL...0.00IN

$$

VOELKER
961 
WWUS53 KFGF 112300
SVSFGF

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE EASTERN ND/GRAND FORKS ND
600 PM CDT FRI OCT 11 2013

NDC039-063-091-112310-
/O.EXP.KFGF.TO.W.0018.000000T0000Z-131011T2300Z/
GRIGGS ND-NELSON ND-STEELE ND-
600 PM CDT FRI OCT 11 2013

...THE TORNADO WARNING FOR NORTHWESTERN STEELE...SOUTHEASTERN NELSON
AND NORTHEASTERN GRIGGS COUNTIES HAS EXPIRED...

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

LAT...LON 4791 9824 4791 9790 4750 9792 4750 9821
TIME...MOT...LOC 2249Z 180DEG 44KT 4761 9807

$$

VOELKER

The office that day

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

IssuedProductOfficeCountiesLasted
Oct 11, 4:01 AM CDTWind AdvisoryFGFRansom, Richland, Sargent15 hr
Oct 11, 4:23 PM CDTSpecial Weather StatementFGFBarnes, Griggs67 min
Oct 11, 6:04 PM CDTTornado WarningFGFCass, Traill41 min

Nearby

Tornado Warnings in North Dakota, 2013Every tornado warning in 2013Tornadoes in 2013

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.