Alert archive / Indiana / Severe Thunderstorm Warnings in 2011

Severe Thunderstorm Warning 23, NWS Northern Indiana

May 10, 20114 counties in Indiana

NWS Northern Indiana issued this severe thunderstorm warning at May 10, 2011, 2:46 PM EDT for 4 counties in Indiana. It was in force for 44 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: May 10, 2011, 2:46 PM EDT (18:46 UTC)
Expired: May 10, 2011, 3:30 PM EDT
In force: 44 min
Issued by: NWS Northern Indiana
Area: Storm-based polygon
Hail: 1.5 in
Wind: 50.0 mph

Counties Adams County, IN, Blackford County, IN, Jay County, IN, Wells County, IN

The radar

The Northern Indiana radar (KIWX), 95 km from the middle of the area, began a volume at 18:46 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.

Did it verify

Not verified. The Iowa Environmental Mesonet's Cow found no qualifying storm report inside this severe thunderstorm warning while it was in force. That is not proof nothing happened: reports are thin where few people live.

Cow counts a report within 15 km of the polygon while the warning was in force: a tornado for a tornado warning; hail of 1 inch or more, a gust of 58 mph or more or wind damage for a severe thunderstorm warning; a flash flood report for a flash flood warning.

The nearest sounding before it

Cncnati-Daytn, OH (KILN), launched 12:00Z, 6.8 hours before the alert went out and 174 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: 9 J/kg
Mixed-layer CIN: -487 J/kg
Mixed-layer LCL: 1473 m above ground
0-6 km bulk shear: 46 kt
0-1 km storm-relative helicity: 194 m²/s²
0-3 km storm-relative helicity: 252 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 4.2

Open this sounding in Storm Lab

The text

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

675 
WUUS53 KIWX 101846
SVRIWX
INC001-009-075-179-101930-
/O.NEW.KIWX.SV.W.0023.110510T1846Z-110510T1930Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE NORTHERN INDIANA
ISSUED BY NATIONAL WEATHER SERVICE INDIANAPOLIS IN
246 PM EDT TUE MAY 10 2011

THE NATIONAL WEATHER SERVICE IN NORTHERN INDIANA HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  SOUTHERN ADAMS COUNTY IN NORTHEAST INDIANA...
  NORTHEASTERN BLACKFORD COUNTY IN EAST CENTRAL INDIANA...
  NORTHERN JAY COUNTY IN EAST CENTRAL INDIANA...
  SOUTHERN WELLS COUNTY IN NORTHEAST INDIANA...

* UNTIL 330 PM EDT

* AT 242 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
  SEVERE THUNDERSTORM CAPABLE OF PRODUCING PING PONG BALL SIZE HAIL. 
  THIS STORM WAS LOCATED 6 MILES NORTHEAST OF MONTPELIER...OR 8 MILES
  SOUTHWEST OF BLUFFTON...AND MOVING SOUTHEAST AT 20 MPH.

* THE SEVERE THUNDERSTORM WILL BE NEAR...
  REIFFSBURG AROUND 250 PM EDT...
  PETROLEUM AND VERA CRUZ AROUND 255 PM EDT...
  NOTTINGHAM AND FIAT AROUND 300 PM EDT...
  DOMESTIC AND BALBEC AROUND 305 PM EDT...
  LINN GROVE AND PENNVILLE AROUND 310 PM EDT...
  BERNE AROUND 320 PM EDT...
  GENEVA AND CEYLON AROUND 325 PM EDT...
  BRYANT...WESTCHESTER AND PORTLAND AROUND 330 PM EDT...

PRECAUTIONARY/PREPAREDNESS ACTIONS...

SEVERE THUNDERSTORMS PRODUCE DAMAGING WIND IN EXCESS OF 60 MILES PER
HOUR...DESTRUCTIVE HAIL...DEADLY LIGHTNING...AND VERY HEAVY RAIN. FOR
YOUR PROTECTION MOVE TO AN INTERIOR ROOM ON THE LOWEST FLOOR OF YOUR
HOME OR BUSINESS. HEAVY RAINS FLOOD ROADS QUICKLY SO DO NOT DRIVE
INTO AREAS WHERE WATER COVERS THE ROAD.

&&

LAT...LON 4039 8495 4063 8541 4067 8538 4067 8534
      4074 8534 4081 8529 4070 8480 4056 8479
TIME...MOT...LOC 1844Z 301DEG 17KT 4063 8522
WIND...HAIL <50MPH 1.50IN

$$

77/TDUD

What forecasters said that day

The local office's own words before this severe thunderstorm warning went out, as it sent them, from the Iowa Environmental Mesonet's archive of National Weather Service text.

NWS Northern Indiana wrote its last area forecast discussion before this severe thunderstorm warning went out at May 10, 2:35 PM EDT, 11 minutes earlier.

Area forecast discussion, May 10, 2:35 PM EDT, 11 minutes before

AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE NORTHERN INDIANA
ISSUED BY NWS INDIANAPOLIS IN
235 PM EDT TUE MAY 10 2011

.SHORT TERM /TONIGHT THROUGH THURSDAY NIGHT/...

FOR TONIGHT...UPPER LEVEL IMPULSE CURRENTLY BRUSHING THE SOUTHERN
PARTS OF THE FORECAST AREA MAY SPARK OFF SOME CONVECTION FOR THE
REST OF THE AFTERNOON BEFORE IMPULSE DRIFTS OFF TO THE SOUTHEAST.
OTHERWISE...CREST OF UPPER RIDGE EXPECTED TO PASS ACROSS THE LOCAL
AREA TONIGHT. AS A RESULT...NOT SEEING TOO MUCH IN THE WAY OF UPPER
SUPPORT FOR PRECIPITATION TONIGHT. HOWEVER...GIVEN THE PRESENCE OF
THE FRONTAL SYSTEM OVER THE SOUTHERN ZONES AND STEEP MID LEVEL LAPSE
RATES...CAN/T RULE OUT SOMETHING DEVELOPING TONIGHT. WILL CONTINUE
WITH SMALL CHANCE POPS FOR TONIGHT.

LOW LEVEL THICKNESSES SUGGEST THE GFS MOS LOWS TONIGHT MAY BE A
LITTLE ON THE COOL SIDE...ESPECIALLY IN THE SOUTH. WILL NUDGE UP THE
LOWS A FEW DEGREES TONIGHT.

IN THE LATER PERIODS...RATHER UNSETTLED WEATHER EXPECTED FOR THE
NEXT COUPLE OF DAYS AS UPPER RIDGE SLOWLY DRIFTS OFF TO THE EAST AND
DEEP UPPER TROUGH APPROACHES FROM THE WEST. AS A RESULT...EXPECTING
PRECIPITATION CHANCES TO SLOWLY INCREASE WITH TIME. AT THE
SURFACE...SHORT TERM MODELS SUGGEST A FRONTAL SYSTEM WILL MEANDER
ACROSS THE AREA THROUGH MUCH OF THE SHORT TERM...ALLOWING FOR A LOW
LEVEL FOCUS FOR PRECIPITATION AS WELL. WILL CONTINUE WITH CHANCE
POPS THROUGH THURSDAY NIGHT.

PROGGED LOW LEVEL THICKNESSES SUGGEST THE GFS MOS GUIDANCE
TEMPERATURES LOOK REASONABLE FOR THE MOST PART. THE ONLY EXCEPTION
IS WITH THE LOWS THURSDAY NIGHT...WHERE THE GUIDANCE LOOKS A LITTLE
COOL. WILL NUDGE THE LOWS UP A FEW DEGREES DURING THAT PERIOD.

&&

.LONG TERM /FRIDAY THROUGH NEXT TUESDAY/...

ENSEMBLE DATA SUGGEST A SLOWLY PROGRESSIVE PATTERN WITH RESPECT TO
THE UPPER FEATURES IS EXPECTED THROUGH THIS PERIOD. LONG WAVE TROUGH
CURRENTLY OVER THE ROCKIES SHOULD DRIFT EAST INTO THE MIDWEST BY
FRIDAY AND LINGER OVER THE GREAT LAKES INTO EARLY NEXT WEEK. THE
PRESENCE OF THE UPPER TROUGH IN THE VICINITY SUGGESTS CHANCE POPS
ARE IN ORDER FOR THE ENTIRE LONG TERM PERIOD. TEMPERATURES ARE
EXPECTED TO AVERAGE BELOW NORMAL.

&&

.AVIATION...

18Z TAFS...MAIN CONCERN FOR TAF PERIOD IS AFTERNOON CONVECTION.  CAP
IS BEGINNING TO BREAK ACROSS MOST OF CENTRAL INDIANA.  AS A
RESULT...INCLUDED VCTS FOR KFWA THROUGH LATE AFTERNOON.
CURRENTLY...MOST STORMS ARE PULSING.  NOT CONFIDENT THAT KSBN WILL
SEE ANY STORMS...SO LEFT OUT FOR NOW.

&&

.IWX WATCHES/WARNINGS/ADVISORIES...
IN...NONE.
MI...NONE.
OH...NONE.
LM...NONE.
&&

SHORT TERM...JAS
LONG TERM...JAS
AVIATION...TDUD

Hazardous weather outlook, May 10, 7:08 AM EDT, 7 hours 38 minutes before

HAZARDOUS WEATHER OUTLOOK...UPDATED
NATIONAL WEATHER SERVICE NORTHERN INDIANA
708 AM EDT TUE MAY 10 2011

INZ003>009-012>018-020-022>027-032>034-MIZ077>081-OHZ001-002-004-005-
015-016-024-025-111115-
LA PORTE-ST. JOSEPH IN-ELKHART-LAGRANGE-STEUBEN-NOBLE-DE KALB-STARKE-
PULASKI-MARSHALL-FULTON IN-KOSCIUSKO-WHITLEY-ALLEN IN-WHITE-CASS IN-
MIAMI-WABASH-HUNTINGTON-WELLS-ADAMS-GRANT-BLACKFORD-JAY-BERRIEN-
CASS MI-ST. JOSEPH MI-BRANCH-HILLSDALE-WILLIAMS-FULTON OH-DEFIANCE-
HENRY-PAULDING-PUTNAM-VAN WERT-ALLEN OH-
INCLUDING THE CITIES OF...MICHIGAN CITY...LA PORTE...SOUTH BEND...
MISHAWAKA...ELKHART...GOSHEN...LAGRANGE...TOPEKA...ANGOLA...
KENDALLVILLE...LIGONIER...AUBURN...GARRETT...KNOX...NORTH JUDSON...
WINAMAC...FRANCESVILLE...PLYMOUTH...BREMEN...ROCHESTER...WARSAW...
WINONA LAKE...COLUMBIA CITY...SOUTH WHITLEY...FORT WAYNE...
MONTICELLO...BROOKSTON...LOGANSPORT...PERU...WABASH...
NORTH MANCHESTER...HUNTINGTON...BLUFFTON...OSSIAN...DECATUR...
BERNE...MARION...HARTFORD CITY...MONTPELIER...PORTLAND...NILES...
BENTON HARBOR...ST. JOSEPH...BUCHANAN...DOWAGIAC...CASSOPOLIS...
STURGIS...THREE RIVERS...COLDWATER...HILLSDALE...BRYAN...WAUSEON...
ARCHBOLD...DEFIANCE...NAPOLEON...PAULDING...ANTWERP...OTTAWA...
PANDORA...VAN WERT...DELPHOS...LIMA
708 AM EDT TUE MAY 10 2011 /608 AM CDT TUE MAY 10 2011/

THIS HAZARDOUS WEATHER OUTLOOK IS FOR PORTIONS OF NORTHWEST OHIO...
NORTHERN INDIANA AND SOUTHWEST LOWER MICHIGAN.

.DAY ONE...TODAY AND TONIGHT

SCATTERED THUNDERSTORMS MAY PRODUCE SOME SMALL HAIL ACROSS
NORTHWEST OHIO EARLY THIS MORNING.

THERE IS ANOTHER CHANCE OF THUNDERSTORMS THIS AFTERNOON AND
TONIGHT. WHILE WIDESPREAD SEVERE WEATHER IS NOT EXPECTED...AN
ISOLATED SEVERE THUNDERSTORM IS POSSIBLE FROM MID AFTERNOON INTO
TONIGHT WITH THE MAIN THREATS BEING LARGE HAIL AND DAMAGING WIND
GUSTS.

.DAYS TWO THROUGH SEVEN...WEDNESDAY THROUGH MONDAY

THERE ARE PERIODIC CHANCES OF THUNDERSTORMS WEDNESDAY THROUGH
SATURDAY. WHILE CONDITIONS WILL BE UNSTABLE...WEAK WIND SHEAR WILL
LIKELY LIMIT THE THREAT FOR WIDESPREAD SEVERE WEATHER.

.SPOTTER INFORMATION STATEMENT...

SPOTTER ACTIVATION IS NOT ANTICIPATED TODAY OR TONIGHT AS
WIDESPREAD SEVERE WEATHER IS NOT EXPECTED. HOWEVER...AN ISOLATED
SEVERE STORM CANNOT BE RULED OUT LATE THIS AFTERNOON INTO TONIGHT.

&&

STAY TUNED TO NOAA WEATHER RADIO FOR FURTHER DETAILS OR UPDATES...OR
CHECK OUR WEB SITE AT WEATHER.GOV/IWX

LMZ043-046-111115-
NEW BUFFALO MI TO ST JOSEPH MI-MICHIGAN CITY IN TO NEW BUFFALO MI-
708 AM EDT TUE MAY 10 2011

THIS HAZARDOUS WEATHER OUTLOOK IS FOR THE NEARSHORE WATERS OF
SOUTHEASTERN LAKE MICHIGAN.

.DAY ONE...TODAY AND TONIGHT

THERE IS A SLIGHT CHANCE OF THUNDERSTORMS TODAY AND TONIGHT.

.DAYS TWO THROUGH SEVEN...WEDNESDAY THROUGH MONDAY

THERE ARE PERIODIC CHANCES OF THUNDERSTORMS WEDNESDAY THROUGH SATURDAY.

&&

STAY TUNED TO NOAA WEATHER RADIO FOR FURTHER DETAILS OR UPDATES...OR
CHECK OUR WEB SITE AT WEATHER.GOV/IWX

The office that day

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

Issued	Product	Office	Counties	Lasted
May 10, 2:46 PM EDT	Severe Thunderstorm Warning	IWX	Blackford, Grant	33 min
May 10, 2:48 PM EDT	Severe Thunderstorm Warning	IWX	Cass, Fulton, Pulaski, White	42 min
May 10, 3:13 PM EDT	Severe Thunderstorm Warning	IWX	Jay	4 min
May 10, 3:22 PM EDT	Severe Thunderstorm Warning	IWX	Blackford, Grant, Jay	38 min
May 10, 3:50 PM EDT	Areal Flood Warning	IWX	Blackford, Jay	2 hr
May 10, 3:56 PM EDT	Severe Thunderstorm Warning	IWX	Blackford, Jay	41 min
May 10, 4:15 PM EDT	Severe Thunderstorm Warning	IWX	Adams, Wells	45 min
May 10, 4:25 PM EDT	Severe Thunderstorm Warning	IWX	Allen	65 min
May 10, 5:00 PM EDT	Areal Flood Warning	IWX	Adams, Allen	101 min
May 10, 5:04 PM EDT	Severe Thunderstorm Warning	IWX	Adams	32 min

Nearby

Severe Thunderstorm Warnings in Indiana, 2011 Every severe thunderstorm warning in 2011

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.