Alert archive / Minnesota / Severe Thunderstorm Warnings in 2012

Severe Thunderstorm Warning 88, NWS Grand Forks, ND

July 22, 2012Becker County, Clay County, Otter Tail County, Minnesota

NWS Grand Forks, ND issued this severe thunderstorm warning at Jul 22, 2012, 7:31 PM CDT for Becker County, Clay County, Otter Tail County, Minnesota. It was in force for 29 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 22, 2012, 7:31 PM CDT (00:31 UTC)
Expired
Jul 22, 2012, 8:00 PM CDT
In force
29 min
Issued by
NWS Grand Forks, ND
Area
Storm-based polygon
Hail
1.0 in
Wind
50.0 mph

Counties Becker County, MN, Clay County, MN, Otter Tail County, MN

The radar

The Fargo/Grand Forks radar (KMVX), 146 km from the middle of the area, began a volume at 00:30 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 22, 7:35 PM CDTHAIL 14 Se Rollag, MN
Jul 22, 7:45 PM CDTTSTM WND DMG2 Wnw Cormorant, MNSEVERAL LARGE TREES WERE EITHER SNAPPED OR UPROOTED ALONG THE NORTH SHORE OF LAKE IDA. TREES VARIED FROM 1 TO 2.5 FOOT IN DIAMETER.

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 22, 3:25 PM CDTSevere Thunderstorm WatchSPC6 hr

The nearest sounding before it

Minneapolis, MN (KMPX), launched 00:00Z, 0.5 hours before the alert went out and 268 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, Minneapolis, MN at 00:00Z on 2012-07-23Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 1224 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, Minneapolis, MN at 00:00Z on 2012-07-23The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 23 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
1224 J/kg
Mixed-layer CIN
-280 J/kg
Mixed-layer LCL
1320 m above ground
0-6 km bulk shear
35 kt
0-1 km storm-relative helicity
23 m²/s²
0-3 km storm-relative helicity
44 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.

418 
WUUS53 KFGF 230031
SVRFGF
MNC005-027-111-230100-
/O.NEW.KFGF.SV.W.0088.120723T0031Z-120723T0100Z/

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

THE NATIONAL WEATHER SERVICE IN GRAND FORKS HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  SOUTHWESTERN BECKER COUNTY IN NORTHWEST MINNESOTA...
  SOUTHEASTERN CLAY COUNTY IN NORTHWEST MINNESOTA...
  NORTHWESTERN OTTER TAIL COUNTY IN WEST CENTRAL MINNESOTA...

* UNTIL 800 PM CDT

* AT 726 PM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
  SEVERE THUNDERSTORM CAPABLE OF PRODUCING QUARTER SIZE HAIL. THE
  STORM WAS LOCATED 5 MILES SOUTHWEST OF CORMORANT...OR 17 MILES
  SOUTHWEST OF DETROIT LAKES...MOVING TO THE EAST AT 25 MPH.

* THE SEVERE THUNDERSTORM WILL BE NEAR...
  DUNVILLA AROUND 740 PM CDT.
  SHOREHAM AND LAKE LIDA AROUND 745 PM CDT.
  VERGAS AROUND 755 PM CDT.
  FRAZEE...DENT AND BIG MCDONALD LAKE AROUND 800 PM CDT.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

LAT...LON 4672 9559 4650 9566 4662 9626 4679 9621
TIME...MOT...LOC 0031Z 282DEG 27KT 4668 9610
WIND...HAIL <50MPH 1.00IN

$$

VG
2 follow-up statements
825 
WWUS53 KFGF 230044
SVSFGF

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

MNC027-230054-
/O.CAN.KFGF.SV.W.0088.000000T0000Z-120723T0100Z/
CLAY MN-
744 PM CDT SUN JUL 22 2012

...THE SEVERE THUNDERSTORM WARNING FOR SOUTHEASTERN CLAY COUNTY IN
NORTHWEST MINNESOTA IS CANCELLED...

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

LAT...LON 4677 9613 4672 9559 4650 9566 4660 9618
TIME...MOT...LOC 0044Z 285DEG 20KT 4666 9602

$$

MNC005-111-230100-
/O.CON.KFGF.SV.W.0088.000000T0000Z-120723T0100Z/
OTTER TAIL MN-BECKER MN-
744 PM CDT SUN JUL 22 2012

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT FOR SOUTHWESTERN
BECKER COUNTY IN NORTHWEST MINNESOTA...AND NORTH CENTRAL OTTER TAIL
COUNTY IN WEST CENTRAL MINNESOTA UNTIL 800 PM CDT...

AT 740 PM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
SEVERE THUNDERSTORM CAPABLE OF PRODUCING QUARTER SIZE HAIL.  THE
STORM WAS LOCATED NEAR DUNVILLA...OR 14 MILES SOUTHWEST OF DETROIT
LAKES...MOVING TO THE EAST AT 25 MPH.

THE SEVERE THUNDERSTORM WILL BE NEAR...
  LAKE LIDA AROUND 755 PM CDT.
  FRAZEE...VERGAS AND STAR LAKE AROUND 800 PM CDT.

THEREAFTER SOME OTHER LOCATIONS IMPACTED BY THE SEVERE THUNDERSTORM
INCLUDE DENT AND BIG MCDONALD LAKE.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

LAT...LON 4677 9613 4672 9559 4650 9566 4660 9618
TIME...MOT...LOC 0044Z 285DEG 20KT 4666 9602
WIND...HAIL <50MPH 1.00IN

$$

VG
197 
WWUS53 KFGF 230058
SVSFGF

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

MNC005-111-230108-
/O.EXP.KFGF.SV.W.0088.000000T0000Z-120723T0100Z/
OTTER TAIL MN-BECKER MN-
758 PM CDT SUN JUL 22 2012

...THE SEVERE THUNDERSTORM WARNING FOR SOUTHWESTERN BECKER COUNTY IN
NORTHWEST MINNESOTA...AND NORTH CENTRAL OTTER TAIL COUNTY IN WEST
CENTRAL MINNESOTA WILL EXPIRE AT 800 PM CDT...

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

LAT...LON 4677 9613 4672 9559 4650 9566 4660 9618
TIME...MOT...LOC 0058Z 285DEG 20KT 4664 9591

$$

VG

The office that day

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

IssuedProductOfficeCountiesLasted
Jul 22, 7:21 PM CDTSpecial Weather StatementFGFBecker24 min
Jul 22, 8:08 PM CDTSpecial Weather StatementFGFBecker67 min
Jul 22, 8:15 PM CDTSevere Thunderstorm WarningFGFBecker, Otter Tail18 min
Jul 22, 8:19 PM CDTSevere Thunderstorm WarningFGFBecker, Hubbard, Wadena37 min

Nearby

Severe Thunderstorm Warnings in Minnesota, 2012Every 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.