Alert archive / New York / Severe Thunderstorm Warnings in 2007

Severe Thunderstorm Warning 76, NWS Burlington, VT

July 10, 2007St. Lawrence County, New York

NWS Burlington, VT issued this severe thunderstorm warning at Jul 10, 2007, 6:08 PM EDT for St. Lawrence County, New York. It was in force for 67 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: Jul 10, 2007, 6:08 PM EDT (22:08 UTC)
Expired: Jul 10, 2007, 7:15 PM EDT
In force: 67 min
Issued by: NWS Burlington, VT
Area: Counties, with a storm outline in the text

County St. Lawrence County, NY

The radar

The Ft Drum radar (KTYX), 92 km from the middle of the area, began a volume at 22:12 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
Jul 10, 7:00 PM EDT	TSTM WND DMG	Russell, NY	SEVERAL TREES DOWN IN THE TOWN OF RUSSELL REPORTED BY TOWN HIGHWAY GARAGE

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

Did it verify

Verified. The Iowa Environmental Mesonet's Cow matched one storm report to this severe thunderstorm warning; the first came 52 minutes after it went out.

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
Jul 10, 12:59 PM EDT	Severe Thunderstorm Watch	SPC	8 hr

The nearest sounding before it

Albany, NY (KALY), launched 12:00Z, 10.1 hours before the alert went out and 244 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: 2432 J/kg
Mixed-layer CIN: -71 J/kg
Mixed-layer LCL: 686 m above ground
0-6 km bulk shear: 32 kt
0-1 km storm-relative helicity: -13 m²/s²
0-3 km storm-relative helicity: 51 m²/s²
Significant tornado parameter: 0.3
Supercell composite: 2.0

Open this sounding in Storm Lab

The text

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

000 
WUUS51 KBTV 102209
SVRBTV
NYC089-102315-
/O.NEW.KBTV.SV.W.0076.070710T2208Z-070710T2315Z/

BULLETIN - EAS ACTIVATION REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE BURLINGTON VT
608 PM EDT TUE JUL 10 2007

THE NATIONAL WEATHER SERVICE IN BURLINGTON HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  ST. LAWRENCE COUNTY IN NORTHERN NEW YORK

* UNTIL 715 PM EDT.

* AT 600 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
  CLUSTER OF STRONG TO SEVERE THUNDERSTORMS CAPABLE OF PRODUCING 
  NICKEL SIZE HAIL...AND   DAMAGING WINDS IN EXCESS OF 60 MPH.  
  THESE STORMS WERE LOCATED NEAR EDWARDS...TO RICHVILLE...AND 
  HEUVELTON...AND MOVING SLOWLY NORTH AT 15 MPH.

* THE SEVERE THUNDERSTORMS WILL BE NEAR...
  PYRITES AROUND 615 PM EDT.
  CANTON AROUND 625 PM EDT.
  MORLEY AROUND 635 PM EDT.
  LISBON AND 6 MILES WEST OF WEST POTSDAM AROUND 640 PM EDT.
  MADRID AROUND 645 PM EDT.
  CHIPMAN AROUND 650 PM EDT.

THESE ARE DANGEROUS STORMS. PREPARE FOR DAMAGING WINDS...DESTRUCTIVE
HAIL...AND DEADLY CLOUD TO GROUND LIGHTNING. MOVE TO A SHELTER...
PREFERABLY INSIDE A STRONG BUILDING BUT AWAY FROM WINDOWS.

LAT...LON 4441 7579 4412 7515 4489 7477 4488 7514
      4467 7553 4454 7567

$$

JMG

2 follow-up statements

000 
WWUS51 KBTV 102247
SVSBTV

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE BURLINGTON VT
644 PM EDT TUE JUL 10 2007

NYC089-102315-
/O.CON.KBTV.SV.W.0076.000000T0000Z-070710T2315Z/
ST. LAWRENCE NY-
644 PM EDT TUE JUL 10 2007

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 715 PM EDT
FOR WESTERN ST. LAWRENCE COUNTY...

AT 636 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR CONTINUED TO
INDICATE A CLUSTER OF STRONG TO LOCALLY SEVERE THUNDERSTORMS CAPABLE 
OF PRODUCING NICKEL SIZE HAIL...AND DAMAGING WINDS IN EXCESS OF 60 
MPH.  THESE STORMS WERE LOCATED FROM NEAR GOUVERNEUR...TO NEAR 
HERMON..MOVING SLOWLY NORTH NORTHEAST AT 10 TO 15 MPH.

OTHER LOCATIONS IN THE WARNING INCLUDE BUT ARE NOT LIMITED TO
DE KALB...PYRITES...AND RICHVILLE.

THESE ARE POTENTIALLY DANGEROUS STORMS. IF YOU ARE IN THEIR 
PATH...PREPARE FOR STRONG WINDS...POSSIBLE LARGE HAIL...AND DEADLY 
CLOUD TO GROUND LIGHTNING. PEOPLE OUTSIDE SHOULD MOVE TO A SHELTER...
PREFERABLY INSIDE A STRONG BUILDING BUT AWAY FROM WINDOWS.

LAT...LON 4441 7579 4412 7515 4489 7477 4488 7514
      4467 7553 4454 7567

$$

JMG

000 
WWUS51 KBTV 102314
SVSBTV

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE BURLINGTON VT
712 PM EDT TUE JUL 10 2007

NYC089-102322-
/O.EXP.KBTV.SV.W.0076.000000T0000Z-070710T2315Z/
ST. LAWRENCE NY-
712 PM EDT TUE JUL 10 2007

...THE SEVERE THUNDERSTORM WARNING FOR WESTERN ST. LAWRENCE COUNTY
EXPIRES AT 715 PM EDT...

THE LOCALLY SEVERE THUNDERSTORMS ACROSS THE COUNTY EARLIER...HAVE 
WEAKENED TO BELOW SEVERE THRESHOLDS. HOWEVER...THUNDERSTORMS WITH 
LOCALLY TORRENTIAL RAINFALL ARE STILL OCCURRING ACROSS THE 
SOUTHWESTERN PORTIONS OF THE COUNTY...WHICH MAY LEAD TO MINOR POOR 
DRAINAGE FLOODING FROM GOUVERNEUR NORTHEASTWARD TO HERMON AND 
PYRITES.

LAT...LON 4441 7579 4412 7515 4489 7477 4488 7514
      4467 7553 4454 7567

$$

JMG

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 Burlington, VT wrote its last area forecast discussion before this severe thunderstorm warning went out at Jul 10, 3:52 PM EDT, 2 hours 16 minutes earlier.

Area forecast discussion, Jul 10, 3:52 PM EDT, 2 hours 16 minutes before

AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE BURLINGTON VT
352 PM EDT TUE JUL 10 2007

.SYNOPSIS...
A SEVERE THUNDERSTORM WATCH CONTINUES IN EFFECT THROUGH 9 PM EARLY
TONIGHT.

SHOWERS AND THUNDERSTORMS WILL BE SCATTERED ACROSS THE AREA
TONIGHT. SOME OF THE STORMS MAY BE ACCOMPANIED BY STRONG
WINDS...SMALL HAIL AND HEAVY RAIN THROUGH EARLY TONIGHT. OTHERWISE
A WARM HUMID AIRMASS WILL CONTINUE ACROSS THE AREA INTO WESNESDAY
NIGHT. A COLD FRONT WILL MOVE ACROSS THE AREA WEDNESDAY AFTERNOON
AND NIGHT...WITH MORE THUNDERSTORMS ACCOMPANIED BY GUSTY
WINDS...HAIL AND HEAVY RAIN. DRIER AIR WILL MOVE INTO THE AREA ON
THURSDAY.

&&

.NEAR TERM /UNTIL 6 AM WEDNESDAY MORNING/...
SEV TSTM WATCH IN EFFECT THRU 9 PM THIS EVE.

SOUTHWEST UPR LVL FLOW ACRS AREA IN ADVANCE OF NXT H/5 TROF MOVG INTO WRN
GRTLKS. SFC FEATURES INCLUDE QUASI STATIONARY FNTL BNDRY FM CAPE
COD...THEN THRU ERN VT...AND INTO NRN NY...THEN W INTO THE CNTRL
GRTLKS. SATL INDCS THAT CLD BAND ASOCD WITH CDFNT BROKE UP
ALLOWING HEATING AND DESTABILIZATION. MAJOR CONTRIB FACTORS TOP
PSBL SEV TSTMS ARE UPLIFT FM TERRAIN...INCRSNG DESTABILIZATION OF
ATMOSPHERE AND CLD BNDRYS.

GREATEST CAPES WRN VT AND ERN/CNTRL NY THUS POT FOR SEV TSTMS ACRS
OUR AREA THIS AFTN INTO THE EVE. WL INDC STG/DAM WNDS...SMALL HAIL
AND HVY RAIN WITH ANY TSTMS INTO FIRST PART OF TNGT. CNVTN DVLPD OVR
ADIRONDACKS AND SRN GREEN MTNS ERLY THIS AFTN WITH STORMS MOVG E
ACRS AREA AND WL CONT INTO THE ERLY NIGHT HOURS.

THEREAFTR...THINGS CALM DOWN A BIT LATER TNGT. HOWEVER WITH APRCHG
TROF TO OUR W...AND MUGGY AIRMASS IN PLACE...WL INDC CHC SHWR/TSTM
OVRNGT...WITH PTCHY LATE NIGHT FOG. WL IND LOWS IN THE UPR 60S TO LWR
70S.

&&

.SHORT TERM /6 AM WEDNESDAY MORNING THROUGH THURSDAY NIGHT/...
DURG WED...H/5 TROF MOVS FM CNTRL GRTLKS WED MRNG...INTO NRN NY
LATE WED AND INTO NEW ENG LTR WED NGT. NXT H/5 TROF APRCHS AREA FM
GRTLKS THURS NGT WITH INCRSG CLDS...AND CHC SHWR NRN NY AND SLGT
CHC ELSW LATE AT NGT. CDFNT ASOCD WITH INITIAL TROF...MOVS FM ERN
GRT LKS ERLY WED...ACRS NRN NY WED AFTN AND VT WED NGT.

STG ACTIVE CDFNT WITH TIGHT THERMAL PACKING ON MODEL. WL GO WITH
LIKELY SHWRS/TSTMS ACRS AREA AND WL INDC GUSTY WINDS...SMALL HAIL
AND HVY RAIN WITH THESE STORMS AS THEY MOV W TO E ACRS AREA...PER
SPC OUTLOOK FOR DAY 2.

THIS IS FOLLOWED BY SOME DRYING THURS IN ADVANCE OF SECONDARY CDFNT
LATER THURS NGT. HAVE GONE CLOSE TO MAV TEMPS...BUT TWEAKED MAXS AND
MINS UP A FEW DEGRS EACH DAY/NGT.

&&

.LONG TERM /FRIDAY THROUGH TUESDAY/...
BASIC TREND IN LATEST AVBL MODEL/ENSEMBLE SOLNS CONTINUES TO PAINT A
RATHER UNSETTLED SCENARIO ACROSS THE NORTH COUNTRY THROUGH MUCH OF
THE EXTENDED. MEAN PATTERN WOULD SUGGEST THE COMBINATION OF UPPER
LVL TROUGHINESS...AND SEVERAL SFC TROUGH PASSGS DURING THE PERIOD
WOULD ARGUE FOR CHC POPS THROUGH MUCH OF THE PERIOD. BEST CHC OF
THUNDER WOULD APPEAR TO OCCUR BY MONDAY INTO TUESDAY WHEN MORE
ENHANCED SFC BASED INSTABILITY APPEARS TO OCCUR.

&&

.AVIATION /20Z TUESDAY THROUGH SUNDAY/...
FOR THE NEXT 24 HOURS...SCT STRONG CONVECTION TO AFFECT REGION
THROUGH THE LATE AFTERNOON/EVENING HOURS WITH ASSOC MVFR/BRIEF IFR
CONDS AND ISOLD SFC WND GUSTS TO 50KT POSSBL. AS CONVECTION WANES
OVERNIGHT...NEAR SATURATED SFC CONDS COMBINED WITH LIGHT WINDS WILL
LEAD TO WIDESPREAD BR AND PATCHY DENSE FOG AFTER 02Z. BY
TOMORROW...INCREASING SOUTHERLY/SOUTHWESTERLY WINDS EXPECTED BY LATE
MORNING/EARLY AFTERNOON HOURS UNDER PRIMARILY VFR CONDS.

THEREAFTER...ON AND OFF CHCS OF SHOWERS AND OCCL BOUTS OF THUNDER
WILL AFFECT THE REGION THROUGH MUCH OF THE PERIOD DUE TO THE
COMBINATION OF AN UPPER TROUGH LATE IN THE WEEK...AND A SFC FRONTAL
PASSG EARLY NEXT WEEK. THUS PRIMARILY VFR CONDS EXPECTED...LOW BRIEF
MVFR/IFR POSSBL IN ANY CONVECTION...AND LATER AT NIGHT DUE TO PATCHY
BR/FG IN FAVORED LOCALES.

&&

.BTV WATCHES/WARNINGS/ADVISORIES...
VT...NONE.
NY...NONE.

&&

SYNOPSIS...SFH
NEAR TERM...SFH
SHORT TERM...SFH
LONG TERM...JMG
AVIATION...JMG

Hazardous weather outlook, Jul 10, 5:08 AM EDT, 13 hours before

HAZARDOUS WEATHER OUTLOOK
NATIONAL WEATHER SERVICE BURLINGTON VT
508 AM EDT TUE JUL 10 2007

NYZ026>031-034-035-087-VTZ001>012-016>019-110915-
NORTHERN ST. LAWRENCE-NORTHERN FRANKLIN-EASTERN CLINTON-
SOUTHEASTERN ST. LAWRENCE-SOUTHERN FRANKLIN-WESTERN CLINTON-
WESTERN ESSEX-EASTERN ESSEX-SOUTHWESTERN ST. LAWRENCE-GRAND ISLE-
WESTERN FRANKLIN-ORLEANS-ESSEX-WESTERN CHITTENDEN-LAMOILLE-CALEDONIA-
WASHINGTON-WESTERN ADDISON-ORANGE-WESTERN RUTLAND-WINDSOR-
EASTERN FRANKLIN-EASTERN CHITTENDEN-EASTERN ADDISON-EASTERN RUTLAND-
508 AM EDT TUE JUL 10 2007

THIS HAZARDOUS WEATHER OUTLOOK IS FOR NORTHERN NEW YORK...CENTRAL
VERMONT...NORTHEAST VERMONT...NORTHWEST VERMONT AND SOUTHERN
VERMONT.

STRONG TO SEVERE THUNDERSTORMS WILL ONCE AGAIN DEVELOP ACROSS THE
NORTH COUNTRY THIS AFTERNOON.

.DAY ONE...TODAY AND TONIGHT

A WEAK SURFACE BOUNDARY WILL INTERACT WITH STRONG DAYTIME HEATING
AND PLENTY OF LOW LEVEL MOISTURE TO FORM ANOTHER ROUND OF SHOWERS
AND THUNDERSTORMS TODAY. THE THUNDERSTORMS WILL FIRST DEVELOP
ACROSS THE HIGHER TERRAIN OF THE ADIRONDACK MOUNTAINS IN NORTHERN NEW
YORK AND GREEN MOUNTAINS IN VERMONT BY EARLY THIS AFTERNOON. THESE
STORMS ARE EXPECTED TO MOVE FROM SOUTHWEST TO NORTHEAST ACROSS THE
REGION AT 15 TO 20 MPH. GIVEN...THE VERY UNSTABLE AIR MASS IN
PLACE...THE PRIMARY SEVERE WEATHER THREAT WILL BE STRONG AND
DAMAGING WINDS. THE VERY WARM TEMPERATURES ALOFT WILL LIMIT THE
POTENTIAL FOR SEVERE HAIL THIS AFTERNOON.

IN ADDITION...THE STORMS WILL BE CAPABLE OF PRODUCING LOCALLY VERY HEAVY
RAINFALL IN A SHORT PERIOD OF TIME. THIS HEAVY RAINFALL...COMBINED
WITH RAINS FROM RECENT STORMS WILL ENHANCE THE POTENTIAL FOR FLASH
FLOODING ACROSS THE REGION. SOME MINOR FLOODING OF SMALL STREAMS
AND POOR DRAINAGE AREAS CAN BE EXPECTED WITH THE STRONGER STORMS
THIS AFTERNOON AND EVENING.

PLEASE STAY TUNED TO NOAA WEATHER RADIO...YOUR LOCAL MEDIA...OR
GO TO WWW.WEATHER.GOV/BURLINGTON FOR FURTHER UPDATES ON THIS
WEATHER SITUATION.

.DAYS TWO THROUGH SEVEN...WEDNESDAY THROUGH MONDAY

ANOTHER ROUND OF STRONG TO SEVERE THUNDERSTORMS WILL IMPACT THE
REGIONS ON WEDNESDAY AFTERNOON AND EVENING. THESE STORMS ARE
EXPECTED TO DEVELOP ALONG A SURFACE COLD FRONT DURING THE
AFTERNOON HOURS...AND WILL HAVE THE POTENTIAL TO PRODUCE STRONG
AND DAMAGING WINDS...ALONG WITH HAIL AND LOCALLY HEAVY DOWN POURS.

.SPOTTER INFORMATION STATEMENT...

SPOTTER ACTIVATION WILL BE NEEDED ACROSS THE NORTH COUNTRY FOR
THIS AFTERNOON THROUGH EARLY EVENING. SPOTTERS ARE ENCOURAGED TO
REPORT ANY SEVERE WEATHER OR FLOODING TO THE NATIONAL WEATHER
SERVICE IN BURLINGTON...ALONG WITH RAINFALL AMOUNTS.

TABER

In the hours before

Local storm report, Jul 10, 3:28 PM EDT, 2 hours 40 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE BURLINGTON VT
328 PM EDT TUE JUL 10 2007

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

0325 PM     HAIL             HARTLAND                43.54N 72.40W
07/10/2007  E0.75 INCH       WINDSOR            VT   TRAINED SPOTTER

&&

DONNYD

Local storm report, Jul 10, 3:49 PM EDT, 2 hours 19 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE BURLINGTON VT
349 PM EDT TUE JUL 10 2007

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

0347 PM     HAIL             SCHROON LAKE            43.83N 73.73W
07/10/2007  E0.88 INCH       ESSEX              NY   POST OFFICE

&&

DONNYD

Local storm report, Jul 10, 3:56 PM EDT, 2 hours 12 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE BURLINGTON VT
356 PM EDT TUE JUL 10 2007

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

0335 PM     HAIL             SOUTH SCHROON           43.79N 73.79W
07/10/2007  E0.88 INCH       ESSEX              NY   PUBLIC

&&

DONNYD

Local storm report, Jul 10, 4:26 PM EDT, 1 hour 42 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE BURLINGTON VT
426 PM EDT TUE JUL 10 2007

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

0312 PM     HAIL             NORWICH                 43.72N 72.30W
07/10/2007  E0.88 INCH       WINDSOR            VT   PUBLIC

0330 PM     TSTM WND DMG     SCHROON LAKE            43.83N 73.73W
07/10/2007                   ESSEX              NY   PUBLIC

            TREES DOWN ON GOLF COURSE

&&

DONNYD

Local storm report, Jul 10, 5:16 PM EDT, 52 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE BURLINGTON VT
516 PM EDT TUE JUL 10 2007

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

0406 PM     HAIL             WESTON                  43.28N 72.80W
07/10/2007  E1.00 INCH       WINDSOR            VT   PUBLIC

0445 PM     HAIL             ELLENBURG DEPOT         44.90N 73.80W
07/10/2007  E0.50 INCH       CLINTON            NY   CO-OP OBSERVER

&&

MACKE

Local storm report, Jul 10, 5:34 PM EDT, 34 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE BURLINGTON VT
534 PM EDT TUE JUL 10 2007

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

0505 PM     HAIL             STANNARD                44.53N 72.22W
07/10/2007  E1.00 INCH       CALEDONIA          VT   TRAINED SPOTTER

0520 PM     HAIL             WHEELOCK                44.59N 72.09W
07/10/2007  E0.50 INCH       CALEDONIA          VT   AIRPLANE PILOT

0515 PM     HAIL             WOODSTOCK               43.63N 72.52W
07/10/2007  E0.25 INCH       WINDSOR            VT   TRAINED SPOTTER

&&

MACKE

The office that day

Everything else NWS Burlington, VT issued on the same UTC day.

Issued	Product	Office	Counties	Lasted
Jul 10, 1:51 PM EDT	Severe Thunderstorm Warning	BTV	Essex	54 min
Jul 10, 2:42 PM EDT	Severe Thunderstorm Warning	BTV	Essex	33 min
Jul 10, 3:16 PM EDT	Severe Thunderstorm Warning	BTV	Essex	59 min
Jul 10, 3:46 PM EDT	Flash Flood Warning	BTV	Essex	3 hr
Jul 10, 4:17 PM EDT	Severe Thunderstorm Warning	BTV	Franklin	58 min
Jul 10, 4:42 PM EDT	Severe Thunderstorm Warning	BTV	Clinton	63 min

Nearby

Severe Thunderstorm Warnings in New York, 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.