Alert archive / Minnesota / Severe Thunderstorm Warnings in 2005

Severe Thunderstorm Warning 406, NWS Twin Cities, MN

September 21, 2005Chisago County, Minnesota

NWS Twin Cities, MN issued this severe thunderstorm warning at Sep 21, 2005, 7:32 PM CDT for Chisago County, Minnesota. It was in force for 58 min. No storm report in the archive falls inside the area while it was in force.

The area

The outline as issued.

The facts

Issued
Sep 21, 2005, 7:32 PM CDT (00:32 UTC)
Expired
Sep 21, 2005, 8:30 PM CDT
In force
58 min
Issued by
NWS Twin Cities, MN
Area
Counties, with a storm outline in the text

County Chisago County, MN

The radar

The Minneapolis radar (KMPX), 90 km from the middle of the area, began a volume at 00:33 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.

The watch it was issued in

The SPC watch in force over the same counties when this warning went out.

IssuedProductOfficeLasted
Sep 21, 4:00 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 92 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 2005-09-22Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 2043 joules per kilogram.LCLLFCEL10008507005003002001001 km2 km3 km6 km9 km12 km15 km-30°-20°-10°0°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Minneapolis, MN at 00:00Z on 2005-09-22The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 274 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
2043 J/kg
Mixed-layer CIN
-38 J/kg
Mixed-layer LCL
1714 m above ground
0-6 km bulk shear
56 kt
0-1 km storm-relative helicity
274 m²/s²
0-3 km storm-relative helicity
406 m²/s²
Significant tornado parameter
1.2
Supercell composite
9.6

Open this sounding in Storm Lab

The text

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

000 
WUUS53 KMPX 220032
SVRMPX
MNC025-220130-
/O.NEW.KMPX.SV.W.0406.050922T0032Z-050922T0130Z/

BULLETIN - EAS ACTIVATION REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE TWIN CITIES/CHANHASSEN MN
732 PM CDT WED SEP 21 2005

THE NATIONAL WEATHER SERVICE IN THE TWIN CITIES HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  CHISAGO COUNTY IN EAST CENTRAL MINNESOTA

* UNTIL 830 PM CDT

* AT 729 PM CDT...DOPPLER RADAR INDICATED A LINE OF SEVERE           
  THUNDERSTORMS...CAPABLE OF PRODUCING LARGE HAIL AND DAMAGING WINDS 
  UP TO 65 MPH...THESE STORMS WERE LOCATED ALONG A LINE EXTENDING    
  FROM NORTH BRANCH TO 8 MILES SOUTH OF STACY...AND MOVING EAST AT   
  35 MPH.

* LOCATIONS IMPACTED INCLUDE...
  CHISAGO CITY...
  LINDSTROM...
  CENTER CITY...
  SHAFER...

LAT...LON 4561 9302 4531 9300 4531 9272 4542 9267
      4554 9275 4555 9285 4562 9291

$$

RJN

The office that day

Everything else NWS Twin Cities, MN issued on the same UTC day.

IssuedProductOfficeCountiesLasted
Sep 21, 7:07 PM CDTSevere Thunderstorm WarningMPXRamsey53 min
Sep 21, 7:08 PM CDTTornado WarningMPXAnoka, Hennepin52 min
Sep 21, 7:16 PM CDTTornado WarningMPXRamsey44 min
Sep 21, 7:22 PM CDTSevere Thunderstorm WarningMPXDakota, Washington53 min
Sep 21, 7:33 PM CDTTornado WarningMPXWashington27 min
Sep 21, 7:42 PM CDTFlash Flood WarningMPXRamsey, Washington3 hr
Sep 21, 7:48 PM CDTFlash Flood WarningMPXHennepin3 hr
Sep 21, 7:54 PM CDTFlash Flood WarningMPXAnoka3 hr
Sep 21, 7:57 PM CDTSevere Thunderstorm WarningMPXAnoka, Hennepin, Ramsey63 min
Sep 21, 8:08 PM CDTSevere Thunderstorm WarningMPXSherburne, Wright67 min
Sep 21, 8:11 PM CDTSevere Thunderstorm WarningMPXDakota, Washington64 min
Sep 21, 8:37 PM CDTFlash Flood WarningMPXSherburne3 hr
Sep 21, 8:38 PM CDTSevere Thunderstorm WarningMPXHennepin22 min
Sep 21, 8:49 PM CDTFlash Flood WarningMPXWright3 hr
Sep 21, 9:21 PM CDTSevere Thunderstorm WarningMPXHennepin39 min
Sep 21, 9:27 PM CDTSevere Thunderstorm WarningMPXKandiyohi, Meeker63 min
Sep 21, 10:25 PM CDTSevere Thunderstorm WarningMPXMcLeod35 min
Sep 21, 10:43 PM CDTSevere Thunderstorm WarningMPXCarver33 min
Sep 21, 11:23 PM CDTSevere Thunderstorm WarningMPXScott25 min
Sep 21, 11:34 PM CDTSevere Thunderstorm WarningMPXDakota41 min
Sep 21, 11:37 PM CDTSevere Thunderstorm WarningMPXRice38 min

Nearby

Severe Thunderstorm Warnings in Minnesota, 2005Every severe thunderstorm warning in 2005

Sources

The product and its follow-ups from the Iowa Environmental Mesonet's archive of National Weather Service and Storm Prediction Center text; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.