Alert archive / Minnesota / Severe Thunderstorm Warnings in 2011

Severe Thunderstorm Warning 71, NWS Grand Forks, ND

July 16, 2011Kittson County, Marshall County, Roseau County, Minnesota

NWS Grand Forks, ND issued this severe thunderstorm warning at Jul 16, 2011, 9:44 PM CDT for Kittson County, Marshall County, Roseau County, Minnesota. 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 16, 2011, 9:44 PM CDT (02:44 UTC)
Expired
Jul 16, 2011, 10:45 PM CDT
In force
61 min
Issued by
NWS Grand Forks, ND
Area
Storm-based polygon
Hail
1.0 in
Wind
50.0 mph

Counties Kittson County, MN, Marshall County, MN, Roseau County, MN

The radar

The Fargo/Grand Forks radar (KMVX), 146 km from the middle of the area, began a volume at 02:44 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 16, 10:28 PM CDTHAIL 11 E Strathcona, MNDECK COVERED WITH QUARTER SIZED HAIL...SOME BIGGER BUT NOT AS LARGE AS HALF DOLLARS

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 16, 4:57 PM CDTTornado WatchSPC7 hr

The nearest sounding before it

International Fa, MN (KINL), launched 00:00Z, 2.7 hours before the alert went out and 209 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, International Fa, MN at 00:00Z on 2011-07-17Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 1181 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, International Fa, MN at 00:00Z on 2011-07-17The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 121 square meters per square second.19395878Sfc1 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
1181 J/kg
Mixed-layer CIN
-107 J/kg
Mixed-layer LCL
1398 m above ground
0-6 km bulk shear
38 kt
0-1 km storm-relative helicity
121 m²/s²
0-3 km storm-relative helicity
115 m²/s²
Significant tornado parameter
0.2
Supercell composite
4.9

Open this sounding in Storm Lab

The text

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

651 
WUUS53 KFGF 170244
SVRFGF
MNC069-089-135-170345-
/O.NEW.KFGF.SV.W.0071.110717T0244Z-110717T0345Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE EASTERN ND/GRAND FORKS ND
944 PM CDT SAT JUL 16 2011

THE NATIONAL WEATHER SERVICE IN GRAND FORKS HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  SOUTHEASTERN KITTSON COUNTY IN NORTHWEST MINNESOTA...
  NORTH CENTRAL MARSHALL COUNTY IN NORTHWEST MINNESOTA...
  SOUTHWESTERN ROSEAU COUNTY IN NORTHWEST MINNESOTA...

* UNTIL 1045 PM CDT

* AT 940 PM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
  LINE OF SEVERE THUNDERSTORMS CAPABLE OF PRODUCING QUARTER SIZE
  HAIL. THE STORMS WERE LOCATED ALONG A LINE EXTENDING FROM 6 MILES
  NORTHEAST OF STRATHCONA TO 6 MILES WEST OF KARLSTAD...MOVING TO THE
  EAST AT 20 MPH.

* SEVERE THUNDERSTORMS WILL BE NEAR...
  HALMA AROUND 950 PM CDT.
  GREENBUSH AROUND 1045 PM CDT.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

LAT...LON 4848 9579 4850 9674 4873 9665 4870 9576
TIME...MOT...LOC 0245Z 266DEG 18KT 4859 9601 4858 9661
WIND...HAIL <50MPH 1.00IN

$$
DK
1 follow-up statement
624 
WWUS53 KFGF 170305
SVSFGF

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE EASTERN ND/GRAND FORKS ND
1005 PM CDT SAT JUL 16 2011

MNC069-089-135-170345-
/O.CON.KFGF.SV.W.0071.000000T0000Z-110717T0345Z/
KITTSON MN-ROSEAU MN-MARSHALL MN-
1005 PM CDT SAT JUL 16 2011

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT FOR NORTH CENTRAL
MARSHALL...SOUTHWESTERN ROSEAU AND SOUTHEASTERN KITTSON COUNTIES IN
NORTHWEST MINNESOTA UNTIL 1045 PM CDT...

AT 1003 PM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
LINE OF SEVERE THUNDERSTORMS CAPABLE OF PRODUCING QUARTER SIZE HAIL. 
THE STORMS WERE LOCATED ALONG A LINE EXTENDING FROM 6 MILES WEST OF
TORFIN TO 2 MILES EAST OF KARLSTAD...MOVING TO THE EAST AT 20 MPH.

SEVERE THUNDERSTORMS WILL BE NEAR...
  GREENBUSH AROUND 1045 PM CDT.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

LAT...LON 4848 9579 4850 9674 4873 9665 4870 9576
TIME...MOT...LOC 0305Z 266DEG 18KT 4860 9586 4859 9646

$$
DK

The office that day

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

IssuedProductOfficeCountiesLasted
Jul 16, 7:54 PM CDTTornado WarningFGFKittson, Marshall51 min
Jul 16, 8:42 PM CDTTornado WarningFGFKittson, Marshall, Roseau48 min
Jul 16, 9:34 PM CDTFlash Flood WarningFGFKittson, Roseau9 hr
Jul 16, 10:38 PM CDTSevere Thunderstorm WarningFGFBeltrami, Marshall, Roseau37 min
Jul 16, 10:41 PM CDTAreal Flood AdvisoryFGFKittson, Marshall8 hr
Jul 16, 11:08 PM CDTSevere Thunderstorm WarningFGFMarshall52 min
Jul 16, 11:20 PM CDTSevere Thunderstorm WarningFGFKittson, Roseau40 min
Jul 17, 12:56 AM CDTSevere Thunderstorm WarningFGFBeltrami, Clearwater, Lake of the Woods, Marshall, Pennington64 min
Jul 17, 1:53 AM CDTSevere Thunderstorm WarningFGFBeltrami37 min
Jul 17, 2:25 AM CDTSevere Thunderstorm WarningFGFBeltrami25 min
Jul 17, 3:01 AM CDTSevere Thunderstorm WarningFGFBeltrami59 min

Nearby

Severe Thunderstorm Warnings in Minnesota, 2011Every severe thunderstorm warning in 2011

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.