Alert archive / Indiana / Severe Thunderstorm Warnings in 2008

Severe Thunderstorm Warning 209, NWS Indianapolis, IN

August 1, 2008Madison County, Indiana

NWS Indianapolis, IN issued this severe thunderstorm warning at Aug 1, 2008, 10:45 PM EDT for Madison County, Indiana. It was in force for 45 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: Aug 1, 2008, 10:45 PM EDT (02:45 UTC)
Expired: Aug 1, 2008, 11:30 PM EDT
In force: 45 min
Issued by: NWS Indianapolis, IN
Area: Storm-based polygon

County Madison County, IN

The radar

The Indianapolis radar (KIND), 85 km from the middle of the area, began a volume at 02:47 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 watch it was issued in

The SPC watch in force over the same counties when this warning went out.

Issued	Product	Office	Lasted
Aug 1, 10:17 PM EDT	Severe Thunderstorm Watch	SPC	3 hr

The nearest sounding before it

Cncnati-Daytn, OH (KILN), launched 00:00Z, 2.8 hours before the alert went out and 192 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: 1511 J/kg
Mixed-layer CIN: -13 J/kg
Mixed-layer LCL: 1473 m above ground
0-6 km bulk shear: 31 kt
0-1 km storm-relative helicity: 67 m²/s²
0-3 km storm-relative helicity: 82 m²/s²
Significant tornado parameter: 0.2
Supercell composite: 2.6

Open this sounding in Storm Lab

The text

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

000 
WUUS53 KIND 020245
SVRIND
INC095-020330-
/O.NEW.KIND.SV.W.0209.080802T0245Z-080802T0330Z/

BULLETIN - EAS ACTIVATION REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE INDIANAPOLIS IN
1045 PM EDT FRI AUG 1 2008

THE NATIONAL WEATHER SERVICE IN INDIANAPOLIS HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  NORTHERN MADISON COUNTY IN CENTRAL INDIANA...

* UNTIL 1130 PM EDT

* AT 1042 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
  SEVERE THUNDERSTORM CAPABLE OF PRODUCING PENNY SIZE HAIL...AND
  DAMAGING WINDS IN EXCESS OF 60 MPH.  THIS STORM WAS LOCATED NEAR
  RIGDON...OR 10 MILES WEST OF FAIRMOUNT...AND MOVING SOUTHEAST AT 20
  MPH.

* THE SEVERE THUNDERSTORM WILL BE NEAR...
  RIGDON BY 1050 PM EDT...
  ORESTES BY 1115 PM EDT...
  ALEXANDRIA BY 1125 PM EDT...

FOR YOUR PROTECTION MOVE TO AN INTERIOR ROOM ON THE LOWEST FLOOR OF
YOUR HOME OR BUSINESS. THIS STORM HAS THE POTENTIAL TO CAUSE SERIOUS
INJURY AND SIGNIFICANT DAMAGE TO PROPERTY.

LAT...LON 4039 8557 4015 8558 4031 8583 4034 8586
      4040 8586 4040 8575
TIME...MOT...LOC 0245Z 314DEG 15KT 4037 8582

$$

JOHNSON

2 follow-up statements

000 
WWUS53 KIND 020311
SVSIND

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE INDIANAPOLIS IN
1111 PM EDT FRI AUG 1 2008

INC095-020330-
/O.CON.KIND.SV.W.0209.000000T0000Z-080802T0330Z/
MADISON-
1111 PM EDT FRI AUG 1 2008

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 1130 PM EDT
FOR NORTHERN MADISON COUNTY...

AT 1105 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR CONTINUED TO
INDICATE A SEVERE THUNDERSTORM CAPABLE OF PRODUCING PENNY SIZE
HAIL...AND DAMAGING WINDS IN EXCESS OF 60 MPH.  THIS STORM WAS
LOCATED NEAR ORESTES...OR 9 MILES SOUTHWEST OF FAIRMOUNT...MOVING
SOUTHEAST AT 17 MPH.

THE SEVERE THUNDERSTORM WILL BE NEAR...
  ALEXANDRIA BY 1120 PM EDT...

LAT...LON 4039 8557 4015 8558 4031 8583 4034 8586
      4040 8586 4040 8575
TIME...MOT...LOC 0311Z 314DEG 15KT 4029 8572

$$

JOHNSON

000 
WWUS53 KIND 020325
SVSIND

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE INDIANAPOLIS IN
1125 PM EDT FRI AUG 1 2008

INC095-020335-
/O.EXP.KIND.SV.W.0209.000000T0000Z-080802T0330Z/
MADISON-
1125 PM EDT FRI AUG 1 2008

...THE SEVERE THUNDERSTORM WARNING FOR NORTHERN MADISON COUNTY WILL
EXPIRE AT 1130 PM EDT/1030 PM CDT/...

THE STORM WILL CONTINUE TO PRODUCE TORRENTIAL DOWNPOURS AND SMALL 
HAIL...BUT HAS WEAKENED BELOW SEVERE LIMITS.

LAT...LON 4039 8557 4015 8558 4031 8583 4034 8586
      4040 8586 4040 8575
TIME...MOT...LOC 0325Z 314DEG 15KT 4025 8567

$$

JOHNSON

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 Indianapolis, IN wrote its last area forecast discussion before this severe thunderstorm warning went out at Aug 1, 6:55 PM EDT, 3 hours 50 minutes earlier.

Area forecast discussion, Aug 1, 6:55 PM EDT, 3 hours 50 minutes before

AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE INDIANAPOLIS IN
655 PM EDT FRI AUG 1 2008

.AVIATION...

DISCUSSION FOR 00Z TAFS.

EVENING THUNDERSTORMS WILL BE SO FAR SOUTH THAT THEY WILL ONLY BE
MENTIONED IN KBMG TAF FOR THE FIRST 3 HOURS. AFTER THAT CLEARING
IS EXPECTED BUT THE VFR CONDITIONS WILL GIVE WAY TO FOG AGAIN
TONIGHT WITH MVFR EXPECTED AT ALL SITES WITH IFR CONDITIONS
POSSIBLE TOWARDS SUNRISE IN THE OUTLYING AREAS. IND SHOULD REMAIN
MVFR OR BETTER. THEN A RETURN TO VFR AT ALL SITES AFTER 14Z.

&&

.PREV DISCUSSION... /ISSUED 200 PM EDT FRI AUG 1 2008/

DISCUSSION...EARLY THIS AFTERNOON A WEAK COOL FRONT WAS FOUND FM
SRN MI TO NRN IL STRETCHING TO N CENTRAL MO. VIS SAT PIX SHOW
ABUNDANT CLOUD COVER ACRS IL AND PLENTY OF SHALLOW CU ACRS INDIANA.
WEAK SW SFC FLOW WAS FOUND ACRS THE AREA AND DEW POINTS WERE QUITE
HUMID...NEAR 70.

MAIN FORECAST CHALLENGE TONIGHT WL BE POPS.

MODELS REMAIN IN PRETTY GOOD AGREEMENT AND WL USE A BLEND FOR THE
MOST PART. H2O VAPOR IMAGERY SHOWS A S/W OVR WRN ONTARIO DIVING SE
TOWARD THE GRT LKS. MODELS KEEP THE BEST DYNAMICS WITH THIS FEATURE
WELL NORTH OF INDIANA. FORECAST SOUNDINGS INDICATE A WEAK CAP IN
PLACE ACRS CENTRAL INDIANA. TIME HEIGHT SECTIONS SHOW LIMITED MID
AND UPPER LVL MOISTURE...BUT GOOD LWR LVL MOISTURE....BUT UPWARD VV
IS NOT WELL ORGANIZED. LITTLE TO NO HELP TONIGHT SEEN ON THE 310K
ISENTROPIC SFC. HENCE BEST CHCS FOR FORCING WL BE DIURNALLY DRIVEN
ALONG WITH EFFECTS FROM THE UPPER S/W...WHICH WL BE MINIMAL.
HENCE...ATTM FEEL THE CAP WL PROBABLY HOLD FOR MUCH OF THE DAY.
HENCE WL KEEP LOW CHC POPS ACRS THE NRN PARTS OF THE FA...AS THIS
AREA WOULD BE MOST LIKELY TO BE INFLUENCED BY THE S/W. FARTHER SOUTH
WL STICK CLOSE TO MAVMOS POPS...WHICH SHUD RESULT IN A DRY FCST.
GIVEN THE MOIST DEW POINTS ACRS THE AREA...WL LEAN TO THE WARMER
SIDE OF THE MAVMOS ON LOWS.

DRIER BUT WARM AIR BEGINS TO SPREAD INTO INDIANA ON SATURDAY AND
SUNDAY AS THE RIDGE OVR THE CENTRAL PLAINS BUILDS INTO THE STATE.
HENCE PTCLDY AND HUMID WARM DAYS ALONG WITH MOCLR AND MILD NIGHTS WL
BE THE WAY TO GO. H8 TEMPS WL GRADUALLY INCREASE AS THE WEEKEND
PROGRESSES...REACHING THE UPPER TEENS BY SUNDAY. GIVEN THE
WARM...MOIST AIR MASS WL CONTINUE TO LEAN TO THE WARMER SIDE OF THE
MAVMOS ON LOWS FOR SAT NIGHT AND SUN NIGHT. AS FOR HIGHS...A BLEND
OF THE MAVMOS AND METMOS SHUD WORK FINE...AS MAVMOS CONTINUE TO RUN
SLIGHTLY WARM.

AS FOR THE EXTENDED...UPPER RIDGE WILL REMAIN OVR THE AREA ON MONDAY
PROVIDING ANOTHER DAY OF HOT AND DRY WX...BUT THE RIDGE WL BEGIN TO
BREAK DOWN AND SLIDE EAST ON TUES AND WED. VERY WARM AND VERY HUMID
AIR WL LINGER IN PLACE ACRS INDIANA AS A COLD FRONT SLOWLY PUSHES
SOUTH THROUGH THIS PERIOD. HENCE WL NEED TO CONTINUE THE TSRA CHCS
FOR TUESDAY AFTERNOON THROUGH WED NIGHT. ADDITIONAL CLOUDS AND
POSSIBLE TSRA SHUD HELP COOL PREVIOUS HIGH TEMPS FROM THE MID 90S
ABOUT 3 TO 5 DEGREES.

ATTM THERE APPEARS TO BE A LACK OF UPPER SUPPORT ON THURSDAY AND
FRIDAY...ALONG WITH WEAK BUT BROAD HIGH PRES IN PLACE AT THE SFC.
FURTHERMORE MID LVLS SUGGEST SUBSIDENCE IN THE WAKE OF WEDNESDAY/S
FRONT. HENCE WL KEEP THE THURSDAY-FRIDAY PD DRY ALONG WITH
SEASONABLE TEMPS FOR NOW.

&&

.IND WATCHES/WARNINGS/ADVISORIES...
NONE.
&&

AVIATION...JOHNSON
PUBLIC...JP

Hazardous weather outlook, Aug 1, 5:30 PM EDT, 5 hours 15 minutes before

HAZARDOUS WEATHER OUTLOOK...UPDATED
NATIONAL WEATHER SERVICE INDIANAPOLIS IN
530 PM EDT FRI AUG 1 2008

INZ021-028>031-035>049-051>057-060>065-067>072-021000-
CARROLL-WARREN-TIPPECANOE-CLINTON-HOWARD-FOUNTAIN-MONTGOMERY-
BOONE-TIPTON-HAMILTON-MADISON-DELAWARE-RANDOLPH-VERMILLION-PARKE-
PUTNAM-HENDRICKS-MARION-HANCOCK-HENRY-VIGO-CLAY-OWEN-MORGAN-
JOHNSON-SHELBY-RUSH-SULLIVAN-GREENE-MONROE-BROWN-BARTHOLOMEW-
DECATUR-KNOX-DAVIESS-MARTIN-LAWRENCE-JACKSON-JENNINGS-
530 PM EDT FRI AUG 1 2008

THIS HAZARDOUS WEATHER OUTLOOK IS FOR CENTRAL INDIANA.

.DAY ONE...TONIGHT.

SCATTERED THUNDERSTORMS ARE POSSIBLE ACROSS CENTRAL INDIANA
TONIGHT. THERE IS A SLIGHT RISK THESE STORMS WILL BE SEVERE WITH
THE MAIN THREATS BEING DAMAGING WINDS...BRIEF HEAVY RAIN AND
DEADLY CLOUD TO GROUND LIGHTNING.

.DAYS TWO THROUGH SEVEN...SATURDAY THROUGH THURSDAY.

THERE IS ALSO A CHANCE OF THUNDERSTORMS TUESDAY AFTERNOON THROUGH
WEDNESDAY NIGHT.

VERY HOT AND HUMID WEATHER WILL OCCUR EARLY NEXT WEEK. AFTERNOON HEAT
INDEX VALUES WILL BE IN THE MIDDLE 90S SUNDAY AND MONDAY AND CLOSE
TO 100 TUESDAY.

.SPOTTER INFORMATION STATEMENT...

SPOTTER ACTIVATION IS POSSIBLE TONIGHT.

&&

MORE INFORMATION...ALONG WITH OTHER WEATHER...HYDROLOGICAL AND
CLIMATE INFORMATION CAN BE FOUND...AT HTTP://WEATHER.GOV/IND (ALL
LOWERCASE)

KOCH

In the hours before

Local storm report, Aug 1, 10:16 PM EDT, 29 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE INDIANAPOLIS IN
1016 PM EDT FRI AUG 01 2008

..TIME...   ...EVENT...      ...CITY LOCATION...     ...LAT.LON...
..DATE...   ....MAG....      ..COUNTY LOCATION..ST.. ...SOURCE....
            ..REMARKS..

0945 PM     TSTM WND DMG     EATON                   40.34N 85.35W
08/01/2008                   DELAWARE           IN   LAW ENFORCEMENT

            2 TREES DOWN IN EATON

&&

PGRAY

The office that day

Everything else NWS Indianapolis, IN issued on the same UTC day.

Issued	Product	Office	Counties	Lasted
Aug 1, 9:37 PM EDT	Severe Thunderstorm Warning	IND	Delaware, Madison	38 min
Aug 1, 9:45 PM EDT	Severe Thunderstorm Warning	IND	Delaware, Randolph	45 min
Aug 1, 10:28 PM EDT	Severe Thunderstorm Warning	IND	Randolph	32 min
Aug 1, 11:11 PM EDT	Areal Flood Advisory	IND	Delaware, Madison	3 hr

Nearby

Severe Thunderstorm Warnings in Indiana, 2008 Every severe thunderstorm warning in 2008

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.