Alert archive / Maryland / Severe Thunderstorm Warnings in 2009
Severe Thunderstorm Warning 138, NWS Philadelphia/Mount Holly
NWS Philadelphia/Mount Holly issued this severe thunderstorm warning at Jul 26, 2009, 4:19 PM EDT for Caroline County, Queen Anne's County, Talbot County, Maryland; Kent County, Delaware. It was in force for 44 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 26, 2009, 4:19 PM EDT (20:19 UTC)
- Expired
- Jul 26, 2009, 5:03 PM EDT
- In force
- 44 min
- Issued by
- NWS Philadelphia/Mount Holly
- Area
- Storm-based polygon
Counties Kent County, DE, Caroline County, MD, Queen Anne's County, MD, Talbot County, MD
The radar
The Dover AFB radar (KDOX), 40 km from the middle of the area, began a volume at 20:20 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 26, 4:22 PM EDT | HAIL 0.88 | Easton, MD | NICKEL SIZE IN EASTON. |
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 |
|---|---|---|---|
| Jul 26, 2:07 PM EDT | Severe Thunderstorm Watch | SPC | 7 hr |
The nearest sounding before it
Wallops Is Stn, VA (KWAL), launched 12:00Z, 8.3 hours before the alert went out and 114 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.
- Mixed-layer CAPE
- 2195 J/kg
- Mixed-layer CIN
- -60 J/kg
- Mixed-layer LCL
- 821 m above ground
- 0-6 km bulk shear
- 18 kt
- 0-1 km storm-relative helicity
- 10 m²/s²
- 0-3 km storm-relative helicity
- 41 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted, in the capitals the NWS used until 2016.
000 WUUS51 KPHI 262019 SVRPHI DEC001-MDC011-035-041-262130- /O.NEW.KPHI.SV.W.0138.090726T2019Z-090726T2130Z/ BULLETIN - EAS ACTIVATION REQUESTED SEVERE THUNDERSTORM WARNING NATIONAL WEATHER SERVICE MOUNT HOLLY NJ 419 PM EDT SUN JUL 26 2009 THE NATIONAL WEATHER SERVICE IN MOUNT HOLLY NJ HAS ISSUED A * SEVERE THUNDERSTORM WARNING FOR... CENTRAL KENT COUNTY IN CENTRAL DELAWARE... CAROLINE COUNTY IN EASTERN MARYLAND... EASTERN TALBOT COUNTY IN EASTERN MARYLAND... THIS INCLUDES THE CITY OF EASTON... CENTRAL QUEEN ANNES COUNTY IN NORTHEAST MARYLAND... * UNTIL 530 PM EDT * AT 417 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A SEVERE THUNDERSTORM CAPABLE OF PRODUCING NICKEL SIZE HAIL...AND DAMAGING WINDS IN EXCESS OF 60 MPH. THIS STORM WAS LOCATED NEAR HAMBLETON...OR NEAR EASTON...AND MOVING NORTHEAST AT 30 MPH. * THE SEVERE THUNDERSTORM WILL BE NEAR... TANYARD AROUND 425 PM EDT... MATTHEWS AROUND 435 PM EDT... GRIFFIN AND CORDOVA AROUND 440 PM EDT... QUEEN ANNE AROUND 445 PM EDT... RIDGELY...DENTON AND JUMPTOWN AROUND 450 PM EDT... OAKLAND AROUND 455 PM EDT... PRECAUTIONARY/PREPAREDNESS ACTIONS... IN ADDITION TO LARGE HAIL AND DAMAGING WINDS...CONTINUOUS CLOUD TO GROUND LIGHTNING IS OCCURRING WITH THIS STORM. MOVE INDOORS IMMEDIATELY LIGHTNING IS ONE OF NATURES GREATEST KILLERS. REMEMBER...IF YOU CAN HEAR THUNDER...YOU ARE CLOSE ENOUGH TO BE STRUCK BY LIGHTNING. A SEVERE THUNDERSTORM WATCH REMAINS IN EFFECT UNTIL 900 PM EDT SUNDAY EVENING FOR DELAWARE AND NORTHEASTERN MARYLAND AND SOUTHERN NEW JERSEY. && LAT...LON 3866 7607 3876 7620 3926 7569 3907 7543 TIME...MOT...LOC 2019Z 223DEG 28KT 3874 7608 $$ NIERENBERG
2 follow-up statements
000 WWUS51 KPHI 262032 SVSPHI SEVERE WEATHER STATEMENT NATIONAL WEATHER SERVICE MOUNT HOLLY NJ 432 PM EDT SUN JUL 26 2009 DEC001-MDC011-035-041-262130- /O.CON.KPHI.SV.W.0138.000000T0000Z-090726T2130Z/ KENT DE-CAROLINE MD-QUEEN ANNES MD-TALBOT MD- 432 PM EDT SUN JUL 26 2009 ...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 530 PM EDT FOR NORTHEASTERN TALBOT...CENTRAL QUEEN ANNES...NORTHERN CAROLINE AND CENTRAL KENT COUNTIES... AT 430 PM EDT...TRAINED WEATHER SPOTTERS REPORTED A SEVERE THUNDERSTORM CAPABLE OF PRODUCING NICKEL SIZE HAIL...AND DAMAGING WINDS IN EXCESS OF 60 MPH. THIS STORM WAS LOCATED NEAR MATTHEWS...OR 8 MILES NORTHEAST OF EASTON...MOVING NORTHEAST AT 35 MPH. AT 422 PM...A TRAINED WEATHER SPOTTER REPORTED NICKEL SIZE HAIL IN EASTON. THE SEVERE THUNDERSTORM WILL BE NEAR... DENTON AND JUMPTOWN BY 440 PM EDT... RIDGELY AND OAKLAND BY 445 PM EDT... GREENSBORO BY 450 PM EDT... GOLDSBORO BY 455 PM EDT... SANDTOWN...GOLDSBORO AND HENDERSON BY 500 PM EDT... HENDERSON BY 505 PM EDT... PRECAUTIONARY/PREPAREDNESS ACTIONS... IN ADDITION TO LARGE HAIL AND DAMAGING WINDS...CONTINUOUS CLOUD TO GROUND LIGHTNING IS OCCURRING WITH THIS STORM. MOVE INDOORS IMMEDIATELY LIGHTNING IS ONE OF NATURES NUMBER ONE KILLERS. REMEMBER...IF YOU CAN HEAR THUNDER...YOU ARE CLOSE ENOUGH TO BE STRUCK BY LIGHTNING. A SEVERE THUNDERSTORM WATCH REMAINS IN EFFECT UNTIL 900 PM EDT SUNDAY EVENING FOR DELAWARE AND NORTHEASTERN MARYLAND AND SOUTHERN NEW JERSEY. A SEVERE THUNDERSTORM WATCH ALSO REMAINS IN EFFECT UNTIL 1100 PM EDT SUNDAY EVENING FOR NEW JERSEY AND EASTERN PENNSYLVANIA. && LAT...LON 3872 7599 3883 7613 3926 7569 3907 7543 TIME...MOT...LOC 2031Z 224DEG 30KT 3885 7594 $$ GORSE
000 WWUS51 KPHI 262103 SVSPHI SEVERE WEATHER STATEMENT NATIONAL WEATHER SERVICE MOUNT HOLLY NJ 503 PM EDT SUN JUL 26 2009 DEC001-MDC011-035-041-262113- /O.CAN.KPHI.SV.W.0138.000000T0000Z-090726T2130Z/ KENT DE-CAROLINE MD-QUEEN ANNES MD-TALBOT MD- 503 PM EDT SUN JUL 26 2009 ...THE SEVERE THUNDERSTORM WARNING FOR NORTHEASTERN TALBOT...EAST CENTRAL QUEEN ANNES...NORTHERN CAROLINE AND CENTRAL KENT COUNTIES IS CANCELLED... THE THUNDERSTORM THAT PROMPTED THE WARNING HAS WEAKENED, THEREFORE THE WARNING HAS BEEN CANCELLED. A SEVERE THUNDERSTORM WATCH REMAINS IN EFFECT UNTIL 900 PM EDT SUNDAY EVENING FOR DELAWARE AND NORTHEASTERN MARYLAND AND SOUTHERN NEW JERSEY. LAT...LON 3872 7599 3883 7613 3926 7569 3907 7543 TIME...MOT...LOC 2103Z 224DEG 30KT 3904 7570 $$ GORSE
The office that day
Everything else NWS Philadelphia/Mount Holly issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jul 25, 9:41 PM EDT | Severe Thunderstorm Warning | PHI | Caroline, Queen Anne's, Talbot | 64 min |
| Jul 25, 10:29 PM EDT | Severe Thunderstorm Warning | PHI | Caroline, Queen Anne's, Talbot | 61 min |
| Jul 26, 7:05 PM EDT | Severe Thunderstorm Warning | PHI | Cecil | 70 min |
Nearby
Severe Thunderstorm Warnings in Maryland, 2009Severe Thunderstorm Warnings in Delaware, 2009Every severe thunderstorm warning in 2009
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.