Several showers developed across northern Indiana on April 1st. Strong winds aloft were brought down during collapse of the showers, with a report of damage in Kosciusko county being received.
Deaths and injuries are direct and indirect together, as the offices filed them. Damage is property and crops in the dollars of the year, not adjusted for inflation, and only where an office estimated it.
The episode as NWS IWX wrote it up.
Several showers developed across northern Indiana on April 1st. Strong winds aloft were brought down during collapse of the showers, with a report of damage in Kosciusko county being received.
The local office's own words before the first event, 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 the first event at Apr 1, 2:51 PM EST, 39 minutes earlier.
AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE NORTHERN INDIANA
351 PM EDT SUN APR 1 2007
.SHORT TERM...
TONIGHT AND MONDAY.
A VERTICALLY STACKED AREA OF LOW PRESSURE WAS LOCATED OVER NW
WISCONSIN THIS AFTN. THE AREA OF LOW PRESSURE WILL MOVE ACRS THE
WRN GREAT LAKES TONIGHT...THEN INTO S CNTRL ONTARIO ON MONDAY. A
TIGHT SFC PRESSURE GRADIENT ACROSS THE REGION...COMBINED WITH AN
ADIABATICALLY MIXED ATMOSPHERE UP TO 7 KFT HAVE RESULTED IN WINDY
CONDITIONS. WINDY CONDITIONS WILL CONTINUE THROUGH AT LEAST 8 PM
EDT...WITH WIND GUSTS IN THE 45 MPH TO 55 MPH RANGE. THUS...THE
WIND ADVISORY WILL REMAIN IN EFFECT UNTIL THEN. WINDS WILL SLOWLY
DIMINISH OVERNIGHT AS THE LOW PRESSURE MOVES AWAY AND THE BOUNDARY
LAYER COOLS. LIMITED INSTABILITY ALONG WITH A FEW VORT LOBES
ROTATING AROUND THE AREA OF LOW PRESSURE WILL BRING SCATTERED
SHOWERS...ISOLATED THUNDERSTORMS TO THE REGION THROUGH THE REMAINDER
OF THE AFTN...WITH A CHANCE OF LIGHT SHOWERS ACRS THE NRN TWO THIRDS
OF THE CWFA THIS EVENING. WITH STRONG WINDS ALOFT...I.E. 50 KNOTS
NEAR 6000 FEET...ANY THUNDERSTORM HAS THE POTENTIAL TO BRING THESE
WINDS TO THE SFC...SO WILL HAVE TO WATCH RADAR TRENDS FOR POTENTIAL
WARNINGS. OTHERWISE...COLD POOL OF AIR AT 850 MB WILL DRIFT ACRS
THE FCST AREA OVERNIGHT...PROVIDING FOR MOSTLY CLOUDY CONDITIONS.
SKIES WILL CLEAR LATE TONIGHT FROM SW TO NE AS WEAK HIGH PRESSURE
BUILDS INTO THE REGION. OVERNIGHT LOWS WILL RANGE FROM THE MID TO
UPPER 40S.
WEAK HIGH PRESSURE WILL DRIFT ACRS THE REGION ON MONDAY. SKIES WILL
BEGIN MOSTLY SUNNY...THEN THEY WILL BECOME PARTLY CLOUDY AS MID LVL
MOISTURE STREAMS ACRS THE FCST AREA IN THE AFTERNOON. TEMPS WILL
CONTINUE ABOVE NORMAL...RANGING FROM THE LOWER 60S NORTH TO THE
LOWER 70S SOUTH. WITH A WEST/SOUTHWEST SFC WIND FLOW...TEMPERATURES
WILL BE COOLER NEAR LAKE MICHIGAN WITH HIGHS IN THE UPPER 50S
EXPECTED.
&&
.LONG TERM...
MONDAY NIGHT THROUGH SUNDAY.
INITIAL FOCUS REMAINS ON CONVECTIVE POTENTIAL BOTH WITH WARM FRONT
MONDAY NIGHT AND STRONG COLD FRONT TUES/TUES EVE.
STRONG ISENTROPIC LIFT WILL BE UNDERWAY MONDAY NIGHT BUT SOME
INDICATIONS ARE BEST MAY QUICKLY SHIFT INTO FAR NORTHERN PARTS OF
THE AREA OR INTO MI BEFORE WE COULD SEE MUCH ALONG THE WARM FRONT.
12Z GUIDANCE REFLECTING THIS WITH HIGH CHC/LOW LIKELY POPS ACROSS
FAR NORTH AND THEN TAPERING TO LITTLE OR NOTHING FURTHER SOUTH. WILL
GO AHEAD AND ADD A 30 POP AFTER MIDNIGHT IN NORTH TO COVER POTENTIAL
AND ALSO BLEND FOR COLLABORATION.
POTENTIAL FOR SEVERE WEATHER STILL IN PLACE TUES INTO EARLY TUESDAY
EVENING. NAM SHOWING PREFNTL TROUGH TO MOVE THROUGH DURING THE
MORNING WITH STRONG LIFT AND HIGHEST DEWPTS ASSOCIATED WITH IT. THE
SCENARIO FOR THIS TO OCCUR IS VERY PLAUSIBLE GIVEN DYNAMICS OF THE
SYSTEM. QUESTION IS WILL THE MSTR RETURN QUICK ENOUGH AHEAD OF THIS
FEATURE AND THEN WHAT WILL MSTR PROFILES/INSTABILITY BEHIND IT FOR
POTENTIAL 2ND ROUND. LI/S CLIMB TO -4 TO - 7 C AND CAPES AOA 1000
J/KG WITH PRE FRONTAL TROUGH AS SFC DEWPTS CLIMB INTO THE LOW 60S.
HINTS AT MAIN LINE TO FORM IN ILLINOIS ON FRONT BY LATE AM/EARLY
AFTN AND RACE EAST. BEST UPPER LEVEL DYNAMICS WILL BE WITH THIS
FRONT WITH A DISTINCT TEMP GRADIENT WITH TEMPS STILL LIKELY IN THE
60S AHEAD TO FALLING INTO THE 40S BEHIND DURING TUES EVE. HAVE
INCREASED POPS TO HIGH CHC IN NW FOR TUES AM TO COVER POTENTIAL FOR
PRE FRONTAL TROUGH AND THEN WENT LIKELY ALL AREAS IN THE AFTN. WILL
HOLD ONTO LIKELY POPS IN THE EAST TUES EVE TO COVER ANYTHING
LINGERING AS MAIN FRONT MOVES THROUGH. FOR NOW WILL KEEP SVR MENTION
OUT OF ZONES AS IS HANDLED WELL IN HWO.
COLD AIR COMES POURING IN BEHIND THE FRONT BUT 1000-850 MB THICKNESS
VALUES DONT DROP BELOW 1300 M UNTIL RIGHT TOWARDS 12Z WEDS IN THE
FAR WEST BUT RAPIDLY SPREAD ACROSS DURING THE AM. AS A RESULT OF
THIS...WILL EXTEND MIX RA/SN INTO WEDS AND CONTINUE THROUGH
THURSDAY. THURS NGT/FRI AM ANOTHER FRONT WILL DROP RAPIDLY SOUTH
FROM THE PLAINS WITH A SHOT OF EVEN COLDER AIR /850 MB TEMPS
DROPPING TO -14 TO -16 C/. ALL PRECIP SHOULD SWITCH TO ALL SNOW AT
THAT POINT BUT STILL COULD BE A MIX. FOR NOW WILL KEEP CHC SNOW
ONLY. IF SFC TEMPS GET COLD ENOUGH AND RATE OF SNOW IS GOOD ENOUGH
WITH ANY SNOWSHOWERS...COULD SEE SOME LIGHT ACCUMS. PLENTY OF TIME
TO DEAL WITH THAT LATER. WITH TREND CONTINUING TOWARDS COLDER HAVE
CHOPPED HIGHS ON THURS THROUGH SAT WITH LARGEST DROP SAT. AFTER THAT
SOME QUESTIONS STILL REMAIN AS TO HOW LONG COLD AIR STICK AROUND.
UPPER LOW CONTINUES TO MEANDER AROUND INTO SUNDAY BUT HOW FAR NORTH
IT DRIFTS REMAINS TO BE SEEN. REGARDLESS...THE UNSEASONABLY WARM
TEMPS WILL BE REPLACED BY UNSEASONABLE COOL TEMPS FOR THE REMAINDER
OF THE PERIOD. WILL HAVE TO WATCH SEVERAL RECORDS THAT MAY BE IN
JEOPARDY DEPENDING ON HOW COLD WE GET. ALSO BUSINESSES WITH INTEREST
IN TEMPS SHOULD MONITOR LATER FORECASTS.
&&
.PREV DISCUSSION...
/ISSUED 104 PM EDT SUN APR 1 2007/
AVIATION...
A NEARLY VERTICALLY STACKED LOW PRESSURE SYSTEM OVER NORTHWEST WI
THIS AFTN WILL ROTATE NE INTO THE WRN GREAT LAKES TONIGHT...THEN
TO A POSITION NORTH OF LAKE HURON BY 18Z TUESDAY. A TANDEM OF WEAK
VORTICITY LOBES WILL ROTATE FROM THIS LOW INTO THE FCST AREA LATE
THIS AFTN AND EVENING. HOWEVER...DEEP MOISTURE WILL BE
LIMITED...SO AM EXPECTING SHOWERS TO BE SCATTERED IN NATURE AS
THEY DEVELOP THIS AFTERNOON. INSTABILITY WILL BE WEAK...BETWEEN
200 AND 500 J/KG...SO ONLY ISOLATED THUNDERSTORMS ARE EXPECTED.
WILL CONTINUE WITH A LOW VFR FCST FOR CIGS AND VSBYS ASSOCD WITH
ANY SHOWERS THROUGH EARLY EVENING. OF MOST CONCERN WILL BE THE
STRONG SYNOPTIC SCALE WIND FLOW. A TIGHT SFC PRESSURE
GRADIENT...COMBINED WITH DEEP BOUNDARY LAYER MIXING...WILL RESULT
IN WINDY CONDITIONS AT BOTH KSBN AND KFWA THROUGH EARLY EVENING.
WINDS WILL SLOWLY DIMINISH OVERNIGHT AS THE BOUNDARY LAYER COOLS
/CUTS OFF DEEP MIXING...AND A THE SFC PRESSURE GRADIENT GRADUALLY
RELAXES. WIND GUSTS BETWEEN 40 AND 45 KNOTS CAN BE EXPECTED THROUGH
EARLY EVENING.
WEAK HIGH PRESSURE IS FCST TO BUILD INTO THE REGION ON MONDAY.
SKIES WILL START OUT MOSTLY CLEAR...THEN AN INCREASE IN MID LVL
CLOUDINESS IS EXPECTED. VFR CONDITIONS ARE FORECAST.
&&
.IWX WATCHES/WARNINGS/ADVISORIES...
IN...WIND ADVISORY UNTIL 8 PM EDT /7 PM CDT/ THIS EVENING FOR
INZ003>009-012>018-020-022>027-032>034.
MI...WIND ADVISORY UNTIL 8 PM EDT THIS EVENING FOR MIZ077>081.
OH...WIND ADVISORY UNTIL 8 PM EDT THIS EVENING FOR OHZ001-002-004-005-
015-016-024-025.
LM...SMALL CRAFT ADVISORY FROM 11 PM THIS EVENING TO 8 AM EDT MONDAY
FOR LMZ043-046.
GALE WARNING UNTIL 11 PM EDT THIS EVENING FOR LMZ043-046.
&&
SHORT TERM/AVIATION...HICKMAN
LONG TERM...FISHERHAZARDOUS WEATHER OUTLOOK...UPDATED NATIONAL WEATHER SERVICE NORTHERN INDIANA 418 PM EDT SUN APR 1 2007 INZ003>009-012>018-020-022>027-032>034-MIZ077>081-OHZ001-002-004-005- 015-016-024-025-021315- 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 418 PM EDT SUN APR 1 2007 /318 PM CDT SUN APR 1 2007/ THIS HAZARDOUS WEATHER OUTLOOK IS FOR PORTIONS OF NORTHWEST OHIO... SOUTHWEST LOWER MICHIGAN AND NORTHERN INDIANA. .DAY ONE...TODAY AND TONIGHT STRONG SOUTHWEST WINDS OF 20 TO 35 MPH WITH GUSTS APPROACHING 50 MPH CAN BE EXPECTED INTO EARLY THIS EVENING. A WIND ADVISORY REMAINS IN EFFECT. SCATTERED SHOWERS WILL CONTINUE TO DEVELOP AND MOVE RAPIDLY EAST ACROSS NORTHEASTERN INDIANA...FAR SOUTHERN LOWER MICHIGAN AND NORTHWESTERN OHIO. A FEW RUMBLES OF THUNDER ARE POSSIBLE. LOCAL WIND GUSTS WITH THESE SHOWERS MAY ALSO APPROACH 50 TO 55 MPH...ALONG WITH A BRIEF PERIOD OF SMALL HAIL. THE OVERALL THREAT FOR SEVERE WEATHER HAS DIMINISHED...BUT AN ISOLATED SEVERE WIND GUST CANNOT BE RULED OUT WITH THE STRONGEST ACTIVITY. .DAYS TWO THROUGH SEVEN...MONDAY THROUGH SATURDAY THUNDERSTORMS ARE EXPECTED AGAIN TUESDAY AND TUESDAY NIGHT. SOME OF THESE STORMS COULD BE SEVERE WITH DAMAGING WINDS...LARGE HAIL BEING THE GREATEST THREAT. AN ISOLATED TORNADO CANNOT BE RULED OUT. .SPOTTER INFORMATION STATEMENT... SPOTTER ACTIVATION IS NOT EXPECTED THROUGH TONIGHT. REPORTS OF HAIL WOULD BE APPRECIATED ALONG WITH PEAK WIND GUSTS. && STAY TUNED TO NOAA WEATHER RADIO FOR FURTHER DETAILS OR UPDATES...OR CHECK OUR WEB SITE AT WEATHER.GOV/IWX LMZ043-046-061-021315- NEW BUFFALO MI TO ST JOSEPH MI-MICHIGAN CITY IN TO NEW BUFFALO MI- MICHIGAN CITY IN TO ST JOSEPH MI OUT TO MID LAKE- 418 PM EDT SUN APR 1 2007 THIS HAZARDOUS WEATHER OUTLOOK IS FOR EXTREME SOUTHEASTERN LAKE MICHIGAN. .DAY ONE...TODAY AND TONIGHT A GALE WARNING IS IN EFFECT THROUGH THIS EVENING. SOUTHWEST WIND TO 35 KNOTS WITH HIGHER GUSTS CAN BE EXPECTED. .DAYS TWO THROUGH SEVEN...MONDAY THROUGH SATURDAY THERE IS A CHANCE OF THUNDERSTORMS WITH GALE FORCE WIND GUSTS TUESDAY AND TUESDAY NIGHT. STRONG NORTHWEST WINDS ARE EXPECTED TO CAUSE HAZARDOUS CONDITIONS FOR SMALL CRAFT WEDNESDAY THROUGH FRIDAY. && STAY TUNED TO NOAA WEATHER RADIO FOR FURTHER DETAILS OR UPDATES...OR CHECK OUR WEB SITE AT WEATHER.GOV/IWX/PROGRAMAREAS/MARINE/INDEX.PHP
1 strong wind. Local standard time, as filed.
A downburst from a collpasing shower produced damage to two 50 foot storage tanks. Neither tank had a roof or dome on them. Winds were estimated around 50 mph.
After NWS Directive 10-1605, the rules offices file Storm Data by.
Every storm in Indiana in 2007Every state in 2007This day in weather historyWarnings in Indiana, April 2007
NOAA National Centers for Environmental Information, Storm Events Database, compiled from the National Weather Service’s monthly Storm Data. Complete through 2026-06; NCEI adds each month about 75 days after it ends and revises past years a few times a year. Rebuilt 2026-09-24. Each event’s entry at NCEI: 22401.