Alert archive / Minnesota / Severe Thunderstorm Warnings in 2004

Severe Thunderstorm Warning 92, NWS Twin Cities, MN

May 9, 2004Ramsey County, Washington County, Minnesota

NWS Twin Cities, MN issued this severe thunderstorm warning at May 9, 2004, 5:47 PM CDT for Ramsey County, Washington County, Minnesota. It was in force for 58 min. 5 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
May 9, 2004, 5:47 PM CDT (22:47 UTC)
Expired
May 9, 2004, 6:45 PM CDT
In force
58 min
Issued by
NWS Twin Cities, MN
Area
Counties, with a storm outline in the text

Counties Ramsey County, MN, Washington County, MN

The radar

The Minneapolis radar (KMPX), 54 km from the middle of the area, began a volume at 22:46 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
May 9, 5:50 PM CDTTSTM WND DMGSt Paul, MNSEVERAL TREES WERE DOWNED IN THE COMO PARK AREA
May 9, 5:54 PM CDTTSTM WND GST 72St Paul, MNMEASURED AT HOLMAN FIELD.
May 9, 5:59 PM CDTHAIL 0.75Woodbury, MN
May 9, 6:02 PM CDTHAIL 0.751 Ne Maplewood, MNREPORTED IN NORTH ST. PAUL AT INTERSECTION OF ROUTE 36 AND 120.
May 9, 6:15 PM CDTHAIL 1North St Paul, MN

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
May 9, 3:55 PM CDTTornado WatchSPC5 hr

The nearest sounding before it

Minneapolis, MN (KMPX), launched 12:00Z, 10.8 hours before the alert went out and 56 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 12:00Z on 2004-05-09Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 8 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 12:00Z on 2004-05-09The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 207 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
8 J/kg
Mixed-layer CIN
-483 J/kg
Mixed-layer LCL
802 m above ground
0-6 km bulk shear
26 kt
0-1 km storm-relative helicity
207 m²/s²
0-3 km storm-relative helicity
170 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 
WUUS53 KMPX 092247
SVRMPX
MNC123-163-092345-

BULLETIN - EAS ACTIVATION REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE TWIN CITIES/CHANHASSEN MN
545 PM CDT SUN MAY 9 2004

THE NATIONAL WEATHER SERVICE IN THE TWIN CITIES HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  RAMSEY COUNTY IN EAST CENTRAL MINNESOTA
  WASHINGTON COUNTY IN EAST CENTRAL MINNESOTA

* UNTIL 645 PM CDT

* AT 542 PM CDT...DOPPLER RADAR INDICATED A LINE OF SEVERE
  THUNDERSTORMS...CAPABLE OF PRODUCING LARGE HAIL. THESE STORMS WERE
  LOCATED ALONG A LINE EXTENDING FROM 17 MILES NORTHWEST OF          
  STILLWATER TO...10 MILES SOUTHWEST OF MAPLEWOOD...OR ALONG A       
  LINE EXTENDING FROM 23 MILES NORTHWEST OF NEW RICHMOND...TO        
  ST PAUL...AND MOVING EAST AT 55 MPH.

AT 545 PM...NICKEL SIZE HAIL WAS REPORTED IN ST. PAUL. 

* LOCATIONS IMPACTED INCLUDE...
  MAPLEWOOD.
  STILLWATER.
  ST PAUL.

LAT...LON 4528 9298 4513 9301 4496 9319 4492 9298
          4480 9285 4527 9279

$$

The office that day

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

IssuedProductOfficeCountiesLasted
May 9, 11:04 AM CDTSevere Thunderstorm WarningMPXYellow Medicine56 min
May 9, 1:53 PM CDTSevere Thunderstorm WarningMPXPope, Stevens67 min
May 9, 2:31 PM CDTSevere Thunderstorm WarningMPXSwift59 min
May 9, 2:59 PM CDTSevere Thunderstorm WarningMPXPope31 min
May 9, 3:21 PM CDTSevere Thunderstorm WarningMPXKandiyohi, Stearns54 min
May 9, 3:29 PM CDTSevere Thunderstorm WarningMPXSwift31 min
May 9, 3:31 PM CDTTornado WarningMPXKandiyohi29 min
May 9, 3:51 PM CDTSevere Thunderstorm WarningMPXSherburne, Wright54 min
May 9, 3:59 PM CDTTornado WarningMPXKandiyohi31 min
May 9, 4:05 PM CDTSevere Thunderstorm WarningMPXMeeker, Stearns55 min
May 9, 4:13 PM CDTTornado WarningMPXMeeker, Stearns47 min
May 9, 4:40 PM CDTSevere Thunderstorm WarningMPXCarver, Hennepin, Wright65 min
May 9, 4:49 PM CDTTornado WarningMPXAnoka, Sherburne, Wright26 min
May 9, 4:58 PM CDTSevere Thunderstorm WarningMPXMcLeod47 min
May 9, 5:11 PM CDTTornado WarningMPXCarver, Hennepin49 min
May 9, 5:18 PM CDTSevere Thunderstorm WarningMPXAnoka42 min
May 9, 5:26 PM CDTSevere Thunderstorm WarningMPXChisago, Isanti64 min
May 9, 5:46 PM CDTSevere Thunderstorm WarningMPXSibley44 min
May 9, 5:48 PM CDTSevere Thunderstorm WarningMPXMcLeod42 min
May 9, 6:18 PM CDTSevere Thunderstorm WarningMPXDakota, Scott57 min
May 9, 6:32 PM CDTSevere Thunderstorm WarningMPXSibley58 min

Nearby

Severe Thunderstorm Warnings in Minnesota, 2004Every severe thunderstorm warning in 2004

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.