Alert archive / Michigan / Severe Thunderstorm Warnings in 2007

Severe Thunderstorm Warning 13, NWS Northern Indiana

May 1, 2007Branch County, Michigan

NWS Northern Indiana issued this severe thunderstorm warning at May 1, 2007, 4:09 PM EDT for Branch County, Michigan. It was in force for 66 min. 4 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 1, 2007, 4:09 PM EDT (20:09 UTC)
Expired: May 1, 2007, 5:15 PM EDT
In force: 66 min
Issued by: NWS Northern Indiana
Area: Counties, with a storm outline in the text

County Branch County, MI

The radar

The Northern Indiana radar (KIWX), 87 km from the middle of the area, began a volume at 20:10 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 1, 4:20 PM EDT	HAIL 0.88	2 Sw Coldwater, MI
May 1, 4:25 PM EDT	HAIL 1	1 W Coldwater, MI	QUARTER SIZE HAIL AT BRANCH COUNTY AIRPORT
May 1, 4:32 PM EDT	HAIL 0.88	Coldwater, MI
May 1, 4:41 PM EDT	HAIL 0.75	1 Sw Coldwater, MI

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.

Issued	Product	Office	Lasted
May 1, 2:01 PM EDT	Severe Thunderstorm Watch	SPC	6 hr

The nearest sounding before it

Detroit, MI (KDTX), launched 12:00Z, 8.2 hours before the alert went out and 156 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: 0 J/kg
Mixed-layer CIN: No buoyant parcel
Mixed-layer LCL: 927 m above ground
0-6 km bulk shear: 63 kt
0-1 km storm-relative helicity: 241 m²/s²
0-3 km storm-relative helicity: 284 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 KIWX 012009
SVRIWX
MIC023-012115-
/O.NEW.KIWX.SV.W.0013.070501T2009Z-070501T2115Z/

BULLETIN - EAS ACTIVATION REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE NORTHERN INDIANA
409 PM EDT TUE MAY 1 2007

THE NATIONAL WEATHER SERVICE IN NORTHERN INDIANA HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  NORTHERN BRANCH COUNTY IN SOUTHWEST MICHIGAN

* UNTIL 515 PM EDT

* AT 406 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
  SEVERE THUNDERSTORM CAPABLE OF PRODUCING QUARTER SIZE HAIL.  THIS
  SEVERE STORM WAS LOCATED 4 MILES WEST OF HODUNK...OR ABOUT 8 MILES
  NORTHWEST OF COLDWATER...AND MOVING EAST AT 40 MPH.

* LOCATIONS IN THE PATH OF THE SEVERE THUNDERSTORM INCLUDE...
  GIRARD AND COLDWATER...
  SOUTH BUTLER...QUINCY AND MARBLE LAKE...

IN ADDITION TO QUARTER SIZE HAIL...CONTINUOUS CLOUD TO GROUND 
LIGHTNING IS OCCURRING WITH THIS SEVERE THUNDERSTORM. MOVE INDOORS 
IMMEDIATELY LIGHTNING IS ONE OF NATURES NUMBER ONE KILLERS. 
REMEMBER...IF YOU CAN HEAR THUNDER...YOU ARE CLOSE ENOUGH TO BE 
STRUCK BY LIGHTNING.

LAT...LON 4186 8483 4188 8529 4207 8528 4207 8484

$$

JC

The office that day

Everything else NWS Northern Indiana issued on the same UTC day.

Issued	Product	Office	Counties	Lasted
May 1, 1:47 PM EDT	Severe Thunderstorm Warning	IWX	Hillsdale	30 min
May 1, 3:31 PM EDT	Severe Thunderstorm Warning	IWX	Branch, Hillsdale	59 min
May 1, 4:39 PM EDT	Tornado Warning	IWX	Branch	18 min
May 1, 4:48 PM EDT	Tornado Warning	IWX	Hillsdale	42 min

Nearby

Severe Thunderstorm Warnings in Michigan, 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.