Alert archive / Minnesota / Severe Thunderstorm Warnings in 2007

Severe Thunderstorm Warning 30, NWS Twin Cities, MN

May 23, 2007Ramsey County, Washington County, Minnesota

NWS Twin Cities, MN issued this severe thunderstorm warning at May 23, 2007, 2:39 PM CDT for Ramsey County, Washington County, Minnesota. It was in force for 51 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: May 23, 2007, 2:39 PM CDT (19:39 UTC)
Expired: May 23, 2007, 3:30 PM CDT
In force: 51 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), 47 km from the middle of the area, began a volume at 19:42 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

Time	Report	Where	Remark
May 23, 3:10 PM CDT	HAIL 0.75	2 E Forest Lake, MN	AT MANNING AVENUE AND HIGHWAY 97

Local storm reports filed while the alert was in force, from inside its polygon or its counties.

The nearest sounding before it

Minneapolis, MN (KMPX), launched 12:00Z, 7.7 hours before the alert went out and 49 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-p

Temperature in red, dew point in green, the mixed-layer parcel dashed.

Hodograph

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: 84 J/kg
Mixed-layer CIN: -48 J/kg
Mixed-layer LCL: 811 m above ground
0-6 km bulk shear: 40 kt
0-1 km storm-relative helicity: 141 m²/s²
0-3 km storm-relative helicity: 164 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 231940
SVRMPX
MNC123-163-232030-
/O.NEW.KMPX.SV.W.0030.070523T1939Z-070523T2030Z/

BULLETIN - EAS ACTIVATION REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE TWIN CITIES/CHANHASSEN MN
239 PM CDT WED MAY 23 2007

THE NATIONAL WEATHER SERVICE IN THE TWIN CITIES HAS ISSUED A

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

* UNTIL 330 PM CDT

* AT 239 PM CDT...DOPPLER RADAR INDICATED A SEVERE THUNDERSTORM...
  CAPABLE OF PRODUCING LARGE HAIL.DAMAGING WINDS IN EXCESS OF 60 MPH.
  THIS STORM WAS LOCATED JUST WEST OF NEW BRIGHTON...OR ABOUT 10 
  MILES NORTH OF MINNEAPOLIS...AND MOVING NORTHEAST AT 35 MPH.

* LOCATIONS IMPACTED INCLUDE...
  WHITE BEAR LAKE...
  FOREST LAKE...
  SHOREVIEW...
  HUGO...

SEVERE THUNDERSTORMS CAN PRODUCE TORNADOES WITH LITTLE OR NO ADVANCE
WARNING. PREPARE TO MOVE TO A PLACE OF SAFETY IN A STURDY STRUCTURE
SUCH AS A BASEMENT OR SMALL INTERIOR ROOM IF A TORNADO IS SPOTTED.

LAT...LON 4496 9316 4497 9318 4503 9318 4511 9321
      4513 9302 4514 9300 4526 9300 4530 9292
      4500 9292

$$
DWE/TDK

The office that day

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

Issued	Product	Office	Counties	Lasted
May 23, 2:06 PM CDT	Severe Thunderstorm Warning	MPX	Hennepin	39 min
May 23, 2:25 PM CDT	Tornado Warning	MPX	Anoka, Hennepin	35 min
May 23, 2:43 PM CDT	Severe Thunderstorm Warning	MPX	Blue Earth, Faribault	62 min
May 23, 3:12 PM CDT	Severe Thunderstorm Warning	MPX	Waseca	46 min
May 23, 3:18 PM CDT	Severe Thunderstorm Warning	MPX	Dakota	42 min
May 23, 3:22 PM CDT	Severe Thunderstorm Warning	MPX	Chisago	53 min
May 23, 3:29 PM CDT	Severe Thunderstorm Warning	MPX	Ramsey, Washington	61 min
May 23, 3:42 PM CDT	Severe Thunderstorm Warning	MPX	Rice	46 min
May 23, 4:07 PM CDT	Tornado Warning	MPX	Goodhue	53 min
May 23, 4:18 PM CDT	Tornado Warning	MPX	Dakota	20 min
May 23, 5:01 PM CDT	Severe Thunderstorm Warning	MPX	Goodhue	44 min
May 23, 6:49 PM CDT	Severe Thunderstorm Warning	MPX	Faribault	41 min
May 23, 6:57 PM CDT	Flash Flood Warning	MPX	Faribault, Freeborn	3 hr

Nearby

Severe Thunderstorm Warnings in Minnesota, 2007 Every severe thunderstorm warning in 2007

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.